DEV 1951 User Manual

User Manual

DEV 1951

Universal Switch Chassis 1 RU

DEV Systemtechnik GmbH

[e-mail]

www.dev-systemtechnik.com

Grüner Weg 4A

61169 Friedberg

GERMANY

Tel: [phone]

Fax: [phone]

Revision: 2017-10-26

DEV 91-0001-O

User Manual DEV 1951

Table of Contents

1 Revision History ----------------------------------------------------------- 8

2 Introduction ---------------------------------------------------------------- 9

2.1 Warranty ---------------------------------------------------------------------------------- 9

2.2 Limitation of Warranty ---------------------------------------------------------------- 9

2.3 Warnings ---------------------------------------------------------------------------------- 9

3 Product Description ----------------------------------------------------- 11

3.1 Features and Options ---------------------------------------------------------------- 11

3.1.1 Device Panel ---------------------------------------------------------------------------- 11

3.1.2 Communication Features ----------------------------------------------------------- 13

3.1.3 Autonomous Switching and Options --------------------------------------------- 14

3.1.4 TRAC Option ---------------------------------------------------------------------------- 14

3.2 Modules Description ---------------------------------------------------------------- 15

3.2.1 DEV 11–0005 --------------------------------------------------------------------------- 15

3.2.2 DEV 11-0009 --------------------------------------------------------------------------- 16

3.2.3 DEV 11-0010 --------------------------------------------------------------------------- 16

3.2.4 DEV 11-0011 --------------------------------------------------------------------------- 16

3.2.5 DEV 11-0024 --------------------------------------------------------------------------- 17

3.2.6 DEV 11-0027 --------------------------------------------------------------------------- 17

3.2.7 DEV 11-0028 --------------------------------------------------------------------------- 17

3.2.8 DEV 11-0033 --------------------------------------------------------------------------- 18

3.2.9 DEV 11-0050 --------------------------------------------------------------------------- 18

3.2.10 DEV 11-0057 --------------------------------------------------------------------------- 18

3.2.11 DEV 11-0058 --------------------------------------------------------------------------- 19

3.2.12 DEV 11-0107 --------------------------------------------------------------------------- 19

3.2.13 DEV 11-0108 --------------------------------------------------------------------------- 19

3.2.14 DEV 13-0169 --------------------------------------------------------------------------- 20

3.2.15 DEV 13-0170 --------------------------------------------------------------------------- 20

3.2.16 DEV 13-0171 --------------------------------------------------------------------------- 20

3.2.17 DEV 13-0174 --------------------------------------------------------------------------- 20

3.2.18 DEV 14-0014 --------------------------------------------------------------------------- 21

3.2.19 DEV 14-0087 --------------------------------------------------------------------------- 21

3.2.20 DEV 14-0088 --------------------------------------------------------------------------- 21

3.2.21 DEV 14-0091 --------------------------------------------------------------------------- 22

3.2.22 DEV 14-0093 --------------------------------------------------------------------------- 22

3.2.23 DEV 14-0095 --------------------------------------------------------------------------- 22

3.2.24 DEV 14-0102 --------------------------------------------------------------------------- 23

3.2.25 DEV 14-0110 --------------------------------------------------------------------------- 23

3.2.26 DEV 7462 -------------------------------------------------------------------------------- 23

3.2.27 DEV 7463 -------------------------------------------------------------------------------- 24

3.3 Product Drawings--------------------------------------------------------------------- 24

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User Manual DEV 1951

4 Installation Instructions ------------------------------------------------ 25

4.1 Scope of Delivery --------------------------------------------------------------------- 25

4.2 Installation of the Product --------------------------------------------------------- 25

4.2.1 Mechanical Integration of the Product ------------------------------------------ 25

4.2.2 Grounding, Data Cables, Alarm Cable, and Power Connection ------------ 25

4.2.3 Connection of Optical Cables ------------------------------------------------------ 26

4.2.4 Connection of RF Signal Cables ---------------------------------------------------- 26

4.2.5 Installation and Exchange of Modules ------------------------------------------- 27

4.2.6 Reset of the Device and the Restore of Factory Defaults ------------------- 27

4.2.7 Configuration Mode ------------------------------------------------------------------ 28

4.3 Device Factory Settings ------------------------------------------------------------- 29

4.3.1 Factory Settings for Sensing Switch Modules ---------------------------------- 29

4.3.2 Factory Communication Protocol Configuration ------------------------------ 29

4.3.3 Factory Network Settings ----------------------------------------------------------- 29

4.3.4 Factory SNMP Settings --------------------------------------------------------------- 30

4.3.5 Factory Sandar Prosan Protocol Settings ---------------------------------------- 30

4.3.6 Factory Leitch Protocol Settings --------------------------------------------------- 30

4.3.7 Factory QEC Protocol Settings ----------------------------------------------------- 30

4.4 Communication Interface Configuration --------------------------------------- 30

4.4.1 Serial Interface------------------------------------------------------------------------- 30

4.4.1.1 Standard Serial Interface Configuration --------------------------------------------------- 31

4.4.1.2 Sandar Prosan Protocol Serial Interface Configuration -------------------------------- 31

4.4.2 Ethernet Interface -------------------------------------------------------------------- 31

4.4.2.1 Ethernet Connection ---------------------------------------------------------------------------- 31

4.4.2.2 Network Setup via the Serial Interface ----------------------------------------------------- 32

4.4.2.2.1 Start and Termination of the Configuration Program ---------------------------------------------- 32

4.4.2.2.2 1 set IP address ----------------------------------------------------------------------------------------------- 34

4.4.2.2.3 2 set netmask ------------------------------------------------------------------------------------------------- 34

4.4.2.2.4 3 set gateway -------------------------------------------------------------------------------------------------- 34

4.5 Maintenance of the Product ------------------------------------------------------- 34

5 Operation of the Product ---------------------------------------------- 35

5.1 Modes of Operation ----------------------------------------------------------------- 35

5.1.1 Local Mode ----------------------------------------------------------------------------- 35

5.1.2 Remote Mode ------------------------------------------------------------------------- 35

5.1.3 Auto Mode ----------------------------------------------------------------------------- 36

5.1.3.1 Autonomous Switching Functionality ------------------------------------------------------ 36

5.1.4 Individual/Simultaneous Switching Mode -------------------------------------- 40

5.2 Initialization of the Device --------------------------------------------------------- 40

5.3 Operation via the Device Panel --------------------------------------------------- 40

5.4 Control via the Digital Interface -------------------------------------------------- 41

5.5 Operation via Web Interface ------------------------------------------------------ 43

5.5.1 Start of the Web Interface ---------------------------------------------------------- 43

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User Manual DEV 1951

5.5.2 The Main Window and Common Features of the Main Tabs --------------- 45

5.5.3 Status Tab ------------------------------------------------------------------------------- 46

5.5.4 Control Tab ----------------------------------------------------------------------------- 47

5.5.4.1 Switch ---------------------------------------------------------------------------------------------- 49

5.5.4.2 Distribution Amplifier -------------------------------------------------------------------------- 51

5.5.5 Events Tab ------------------------------------------------------------------------------ 52

5.5.6 Recording Tab -------------------------------------------------------------------------- 53

5.5.7 Setup Tab ------------------------------------------------------------------------------- 57

5.5.7.1 User Setup ----------------------------------------------------------------------------------------- 58

5.5.7.1.1 Password and Language ------------------------------------------------------------------------------------ 58

5.5.7.1.2 User Management ------------------------------------------------------------------------------------------- 58

5.5.7.2 System Setup ------------------------------------------------------------------------------------- 60

5.5.7.2.1 Network--------------------------------------------------------------------------------------------------------- 60

5.5.7.2.2 SNMP ------------------------------------------------------------------------------------------------------------ 61

5.5.7.2.3 CPH --------------------------------------------------------------------------------------------------------------- 62

5.5.7.3 Feature Setup ------------------------------------------------------------------------------------- 64

5.5.7.3.1 Recording ------------------------------------------------------------------------------------------------------- 64

5.5.7.3.2 Auto Mode ----------------------------------------------------------------------------------------------------- 65

5.5.7.3.3 Time Based Switching --------------------------------------------------------------------------------------- 67

5.5.7.3.4 TRAC ------------------------------------------------------------------------------------------------------------- 69

5.5.7.3.4.1 TRAC Setup ----------------------------------------------------------------------------------------------------- 70

5.5.7.3.4.2 IP Monitor ------------------------------------------------------------------------------------------------------ 74

5.5.7.3.4.3 Trap Log --------------------------------------------------------------------------------------------------------- 75

5.5.7.3.5 Actions ---------------------------------------------------------------------------------------------------------- 76

5.5.7.3.5.1 Switching Actions -------------------------------------------------------------------------------------------- 76

5.5.7.3.5.2 Action Log ------------------------------------------------------------------------------------------------------ 78

5.5.7.4 Software Service --------------------------------------------------------------------------------- 79

5.5.7.4.1 Restore Factory Defaults ----------------------------------------------------------------------------------- 79

5.5.7.4.2 Data Backup --------------------------------------------------------------------------------------------------- 79

5.5.7.4.3 Firmware Update --------------------------------------------------------------------------------------------- 83

5.5.8 Info Tab ---------------------------------------------------------------------------------- 84

5.6 Control via Remote Interface: Sandar Prosan Protocol --------------------- 85

5.6.1 Sandar Prosan Protocol Overview ------------------------------------------------ 85

5.6.2 Sandar Prosan Protocol Communication Structure --------------------------- 85

5.6.3 Sandar Prosan Commands ---------------------------------------------------------- 86

5.6.3.1 Status Query (Q) --------------------------------------------------------------------------------- 86

5.6.3.2 Query Alarm Messages (AM or AMA) ------------------------------------------------------ 86

5.6.3.3 System Identification (XR) --------------------------------------------------------------------- 87

5.6.3.4 Read Status of Signal Path (S or SA) --------------------------------------------------------- 87

5.6.3.5 Set Signal Path (M) ------------------------------------------------------------------------------ 88

5.6.3.5.1 Command Set 1 ----------------------------------------------------------------------------------------------- 88

5.6.3.5.2 Command Set 2 ----------------------------------------------------------------------------------------------- 88

5.6.3.6 Select Remote Control Mode (PMCI/PMCE)---------------------------------------------- 89

5.6.3.7 Select Switching Operation Mode (PMOI/PMOS) --------------------------------------- 89

5.6.3.8 Select Echo in Local Mode (PME0/PME1) ------------------------------------------------- 90

5.6.3.9 Select Power Supply Monitoring Mode (PMP0/PMP1) -------------------------------- 90

5.7 Control via Remote Interface: Leitch Protocol -------------------------------- 91

5.7.1 Leitch Protocol Overview ----------------------------------------------------------- 91

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User Manual DEV 1951

5.7.2 Leitch Protocol Communication Structure -------------------------------------- 92

5.7.3 Leitch Telnet Authentication ------------------------------------------------------- 93

5.7.4 Leitch Commands --------------------------------------------------------------------- 93

5.7.4.1 Enable Reporting (?) ---------------------------------------------------------------------------- 93

5.7.4.2 Alarms Request (Q?) ---------------------------------------------------------------------------- 93

5.7.4.3 Device Description Request (I?A) ------------------------------------------------------------ 94

5.7.4.4 Device Version Request (I?V) ----------------------------------------------------------------- 94

5.7.4.5 Request Crosspoint Status (S?{Lvl}) --------------------------------------------------------- 95

5.7.4.5.1 One Switch Module Installed ----------------------------------------------------------------------------- 95

5.7.4.5.2 Two Switch Modules Installed & Individual Switch Level Assignment Disabled ------------- 95

5.7.4.5.3 Two Switch Modules Installed & Individual Switch Level Assignment Enabled ------------- 95

5.7.4.6 Direct Crosspoint Take (X:) -------------------------------------------------------------------- 96

5.7.4.6.1 One Switch Module Installed ----------------------------------------------------------------------------- 97

5.7.4.6.2 Two Switch Modules Installed & Individual Switch Level Assignment Disabled ------------- 97

5.7.4.6.3 Two Switch Modules Installed & Individual Switch Level Assignment Enabled ------------- 97

5.8 Control via Remote Interface: QEC Protocol ---------------------------------- 98

5.8.1 QEC Protocol Overview -------------------------------------------------------------- 98

5.8.2 QEC Protocol Communication Structure ---------------------------------------- 98

5.8.3 QEC Commands ---------------------------------------------------------------------- 100

5.8.3.1 Check Change Flag / Unit Status (C)------------------------------------------------------- 100

5.8.3.2 Check Queue (Q) ------------------------------------------------------------------------------- 101

5.8.3.3 Firmware Version / Unit ID (F) ------------------------------------------------------------- 102

5.8.3.4 Query Output Channel (O) ------------------------------------------------------------------ 102

5.8.3.5 Set Crosspoint (S) ------------------------------------------------------------------------------ 103

5.9 Control via Remote Interface: SNMP ------------------------------------------- 104

5.9.1 SNMP Overview ---------------------------------------------------------------------- 104

5.9.2 Private Enterprise Number, Device Index Number -------------------------- 104

5.9.3 The Switch MIB Tree ---------------------------------------------------------------- 105

5.9.4 MIB Objects --------------------------------------------------------------------------- 105

5.9.4.1 .devSwitchTraps ------------------------------------------------------------------------------- 106

5.9.4.1.1 .devSwitchTraps.trapAlarmText ------------------------------------------------------------------------ 106

5.9.4.1.2 .devSwitchTraps.trapAlarm ------------------------------------------------------------------------------ 106

5.9.4.1.3 .devSwitchTraps.trapModeChange -------------------------------------------------------------------- 106

5.9.4.2 .instrument -------------------------------------------------------------------------------------- 107

5.9.4.2.1 .instrument.controllerMac ------------------------------------------------------------------------------ 107

5.9.4.2.2 .instrument.firmwareRevision -------------------------------------------------------------------------- 107

5.9.4.2.3 .instrument.instrumentType ---------------------------------------------------------------------------- 107

5.9.4.2.4 .instrument.antennaControllerType ------------------------------------------------------------------ 107

5.9.4.3 .application -------------------------------------------------------------------------------------- 108

5.9.4.3.1 .application.controlMode -------------------------------------------------------------------------------- 108

5.9.4.3.2 .application.switchingControl --------------------------------------------------------------------------- 108

5.9.4.3.3 .application.simultaneousMode ----------------------------------------------------------------------- 109

5.9.4.3.4 .application.numberOfSwitchGroups ----------------------------------------------------------------- 109

5.9.4.3.5 .application.switchGroupTable ------------------------------------------------------------------------- 109

5.9.4.3.5.1 .application.switchGroupTable.switchGroupEntry.swGroupIndex --------------------------- 109

5.9.4.3.5.2 .application.switchGroupTable.switchGroupEntry.swGroupMembers ---------------------- 109

5.9.4.3.5.3 .application.switchGroupTable.switchGroupEntry.swGroupMainRfStatus ----------------- 110

5.9.4.3.5.4 .application.switchGroupTable.switchGroupEntry.swGroupRedundancyRfStatus ------- 110

5.9.4.3.6 .application.numberOfSwitchUnits -------------------------------------------------------------------- 111

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User Manual DEV 1951

5.9.4.3.7 .application.switchUnitTable ---------------------------------------------------------------------------- 111

5.9.4.3.7.1 .application.switchUnitTable.switchUnitEntry.swIndex ----------------------------------------- 111

5.9.4.3.7.2 .application.switchUnitTable.switchUnitEntry.swSize-------------------------------------------- 111

5.9.4.3.7.3 .application.switchUnitTable.switchUnitEntry.swMembers ------------------------------------ 112

5.9.4.3.7.4 .application.switchUnitTable.switchUnitEntry.swPosition -------------------------------------- 112

5.9.4.3.8 .application.numberOfPorts ----------------------------------------------------------------------------- 113

5.9.4.3.9 .application.portTable ------------------------------------------------------------------------------------ 113

5.9.4.3.9.1 .application.portTable.portEntry.portIndex -------------------------------------------------------- 114

5.9.4.3.9.2 .application.portTable.portEntry.poEnable --------------------------------------------------------- 115

5.9.4.3.9.3 .application.portTable.portEntry.poType ------------------------------------------------------------ 115

5.9.4.3.9.4 .application.portTable.portEntry.poHasRfSense --------------------------------------------------- 115

5.9.4.3.9.5 .application.portTable.portEntry.poRfSense-------------------------------------------------------- 115

5.9.4.3.9.6 .application.portTable.portEntry.poRfLimit --------------------------------------------------------- 116

5.9.4.3.9.7 .application.portTable.portEntry.poHasBias -------------------------------------------------------- 116

5.9.4.3.9.8 .application.portTable.portEntry.poBiasOnOff ----------------------------------------------------- 116

5.9.4.3.9.9 .application.portTable.portEntry.poBiasCurrent -------------------------------------------------- 116

5.9.4.3.9.10 .application.portTable.portEntry.poBiasLimitLo --------------------------------------------------- 116

5.9.4.3.9.11 .application.portTable.portEntry.poBiasLimitHi --------------------------------------------------- 116

5.9.4.3.9.12 .application.portTable.portEntry.poHasGain ------------------------------------------------------- 117

5.9.4.3.9.13 .application.portTable.portEntry.poGain ------------------------------------------------------------ 117

5.9.4.3.9.14 .application.portTable.portEntry.poHasTilt --------------------------------------------------------- 117

5.9.4.3.9.15 .application.portTable.portEntry.poTilt -------------------------------------------------------------- 117

5.9.4.3.9.16 .application.portTable.portEntry.poCardType ----------------------------------------------------- 117

5.9.4.3.9.17 .application.portTable.portEntry.poSlot ------------------------------------------------------------- 118

5.9.4.3.9.18 .application.portTable.portEntry.poRfSenseStatus ----------------------------------------------- 118

5.9.4.3.9.19 .application.portTable.portEntry.poBiasStatus ---------------------------------------------------- 118

5.9.4.3.9.20 .application.portTable.portEntry.poLightStatus --------------------------------------------------- 118

5.9.4.3.9.21 .application.portTable.portEntry.poCardStatus --------------------------------------------------- 119

5.9.4.3.10 .application.antennaStatus ------------------------------------------------------------------------------ 119

5.9.4.3.11 .application.antennaPosition --------------------------------------------------------------------------- 119

5.9.4.4 .surveillance ------------------------------------------------------------------------------------- 120

5.9.4.4.1 .surveillance.trapEnableMask--------------------------------------------------------------------------- 121

5.9.4.4.2 .surveillance.errorEnableMask ------------------------------------------------------------------------- 121

5.9.4.4.3 .surveillance.numberOfErrors -------------------------------------------------------------------------- 122

5.9.4.4.4 .surveillance.errorTable ---------------------------------------------------------------------------------- 122

5.9.4.4.4.1 .surveillance.errorTable.errorEntry.errorIndex ---------------------------------------------------- 122

5.9.4.4.4.2 .surveillance.errorTable.errorEntry.errorNr -------------------------------------------------------- 122

5.9.4.4.4.3 .surveillance.errorTable.errorEntry.errorCount---------------------------------------------------- 122

5.9.4.4.4.4 .surveillance.errorTable.errorEntry.errorDateTime ----------------------------------------------- 123

5.9.4.4.4.5 .surveillance.errorTable.errorEntry.errorPending ------------------------------------------------- 123

5.9.4.4.4.6 .surveillance.errorTable.errorEntry.errorAcknowledge ------------------------------------------ 123

5.9.4.4.5 .surveillance.numberOfPowerLines ------------------------------------------------------------------- 123

5.9.4.4.6 .surveillance.powerLineTable --------------------------------------------------------------------------- 123

5.9.4.4.6.1 .surveillance.powerLineTable.powerLineEntry.powerLineIndex ------------------------------ 123

5.9.4.4.6.2 .surveillance.powerLineTable.powerLineEntry.powerLineStatus ----------------------------- 124

5.9.4.4.7 .surveillance.numberOfPowerSupplies --------------------------------------------------------------- 124

5.9.4.4.8 .surveillance.powerSupplyTable ----------------------------------------------------------------------- 124

5.9.4.4.8.1 .surveillance.powerSupplyTable.powerSupplyEntry.powerSupplyIndex -------------------- 124

5.9.4.4.8.2 .surveillance.powerSupplyTable.powerSupplyEntry.powerSupplyStatus ------------------- 124

5.9.4.4.9 .surveillance.numberOfFans ---------------------------------------------------------------------------- 124

5.9.4.4.10 .surveillance.fanTable ------------------------------------------------------------------------------------- 124

5.9.4.4.10.1 .surveillance.fanTable.fanEntry.fanIndex ------------------------------------------------------------ 125

5.9.4.4.10.2 .surveillance.fanTable.fanEntry.fanStatus ----------------------------------------------------------- 125

5.9.4.4.11 .surveillance.internalDeviceStatus --------------------------------------------------------------------- 125

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User Manual DEV 1951

5.9.4.4.12 .surveillance.externalDeviceStatus -------------------------------------------------------------------- 125

5.9.4.4.13 .surveillance.supportHardwareStatus ---------------------------------------------------------------- 125

5.9.4.4.14 .surveillance.errorDescription -------------------------------------------------------------------------- 125

6 Event Indication -------------------------------------------------------- 126

6.1 Event Indication via Alarm Connector ----------------------------------------- 126

6.1.1 A/B Alarm ------------------------------------------------------------------------------ 126

6.1.2 Summary Alarm ---------------------------------------------------------------------- 126

6.2 Software Event Indication --------------------------------------------------------- 127

6.2.1 Power Events-------------------------------------------------------------------------- 127

6.2.2 Switch Module Events -------------------------------------------------------------- 127

6.2.3 Input Module Events ---------------------------------------------------------------- 127

6.2.4 RF Level Monitoring Events -------------------------------------------------------- 127

6.2.5 Digital Signal Quality Events ------------------------------------------------------- 128

6.2.6 Other Events -------------------------------------------------------------------------- 128

7 Connectors -------------------------------------------------------------- 129

8 Technical Data and Options ----------------------------------------- 130

9 Conformance Declarations ------------------------------------------ 130

9.1 Certificate of Conformance ------------------------------------------------------- 130

9.2 EU Declaration of Conformity ---------------------------------------------------- 133

10 Glossary ------------------------------------------------------------------ 134

11 Notes ---------------------------------------------------------------------- 135

 Copyright DEV Systemtechnik GmbH 2004-2017 7

User Manual DEV 1951

Revision (Date)

Author

Short Description

A (03-Aug-2005)

MA

Recent version (added chapter SNMP and introduced
revision history)

B (02-Aug-2006)

WP

Various bug fixes

C (15-Feb-2007)

WP

Added WEEE statement

D (06-Dec-2007)

WP

Complete rework due to new microcontroller

E (27-May-2008)

WP

Complete rework to new document format and due to
changes in the FW

F (12-May-2010)

WP

Minor corrections

G (05-Oct-2010)

WP

Complete rework due to new CPU & SW

H (22-Dec-2011)

WP

Complete rework due to new features: data backup,
recording functionality, automatic switch back option,
MIB changes etc.

I (10-Jan-2012)

WP

Minor corrections

J (26-Feb-2013)

WP

Complete rework due to new modules and due to new
Web I/F functionalities

K (19-Nov-2013)

WP

Rework due to new modules / new functionalities

L (10-Apr-2014)

WP

Rework due to module modifications

M (23-Sep-2015)

WP

Rework due to changes in module portfolio

N (09-Jun-2017)

WP

Rework due to new document format including minor
corrections

O (26-Oct-2017)

WP

Complete rework

1 Revision History

8  Copyright DEV Systemtechnik GmbH 2004-2017

User Manual DEV 1951

2 Introduction

Thank you for purchasing a DEV 1951 Universal Switch Chassis. This user manual is
intended to familiarize you with the installation and operation of the product.

The DEV 1951 chassis for professional use can be equipped with one or two switch
modules with the same or different functionalities, thus realizing a single or dual
channel switching solution. There is a large selection of switch modules for
different applications; in addition, there are available some modules without
switching functionality that can be applied to the DEV 1951 chassis as well.

DEV Systemtechnik GmbH declares that this equipment meets all relevant
standards and rules. The unit carries a CE mark.

Please read all instructions before installation or usage of the product!

2.1 Warranty

The product has a warranty against defects in material and workmanship for a
period of two years from the date of shipment.
During the warranty period DEV Systemtechnik will, at its option, either repair or
replace the product if it turns out to be defective.

For warranty, service, or repair, the product must be returned to DEV System­technik. The customer has to pay shipping charges to DEV Systemtechnik and
DEV Systemtechnik will pay shipping charges to return the product to the customer.
However, the customer is obliged to pay all duties, all taxes, and all other additional
costs arising from the shipment of the product.

DEV Systemtechnik warrants that the software and firmware designated by
DEV Systemtechnik for use with the product will execute its programming
instructions if installed properly. DEV Systemtechnik does not warrant that the
operation of the product, software, or firmware will be uninterrupted or error-free.

2.2 Limitation of Warranty

The preceding warranty does not apply to defects resulting from:

 improper site preparation or site maintenance;
 improper or inadequate interfacing of the product;
 unauthorized modification or misuse of the product;
 the application of software supplied by the customer;
 improper or inadequate maintenance of the product;
 operation beyond the environmental conditions specified for the product.

2.3 Warnings

The following safety measures must be observed during all phases of operation,
service, and repair of the device. Failure to comply with the safety precautions or
warnings in this document violates safety standards of design, manufacturing, and
intended use of the device and may affect the built-in protections. DEV System­technik shall not be liable for the user's failure to comply with these requirements.
Disconnect the device from any external power line before opening of the housing.
In any case, the device is to be opened by trained service staff, only.

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User Manual DEV 1951

Environmental Conditions
The device is designed for indoor use and for an ambient temperature range.

Mechanical Integration
It is not permitted to fix the chassis on the rack mount flanges, only. Balanced
weight distribution of the chassis has to be ensured by placing it on a solid surface
or by using rack rails.
Sufficient airflow through the chassis must be ensured to achieve best cooling
results. Do not block or obstruct the airflow through the chassis at the front and at
the rear side, e.g. by placing large components close to the rear side.

Grounding, AC Connection, Cables
To minimize shock hazard the device must be connected to an electrical ground via
a ground wire, please refer to chapter 4.2.2.
For the AC connection, the device must be connected to the AC power supply
mains through two power cables with three conductors and with the ground wire
firmly connected to an electrical ground (safety ground) at the power outlet. Any
interruption of the protective ground conductor will cause a potential shock hazard
that might cause personal injury.
Risk of electrical shock and energy hazard:
Disconnecting a single power supply line only does not interrupt the AC supply of
the device. To isolate the device completely, disconnect both power supply lines.
Do not connect the device to AC mains supply exceeding the specifications for input
voltage and frequency. The recommended AC cables to be applied are standard
high temperature power cables with type IEC 60320-C13 appliance plug appro­priately rated to the conditions of the country where the device is operated.

Laser Safety (applies if equipped with Optical Switch Modules DEV 7462, DEV 7463)

 Safety of Laser Products

DEV Systemtechnik recommends following the governing standard of the
country where the product is operated to assure regulatory compliance and to
provide the necessary safety programs to protect the operators and other
persons who get in contact with the product.

 It is recommended to power down the product while working on the optical

fiber wiring.

 The optical modules installed in the product operate with light at a non-visible

wavelength. Highest caution has to be taken, since the modules may carry laser
light that is capable to harm the human eye!
If no optical fiber is (to be) connected to an optical module, the optical con­nector(s) have to be equipped with the appropriate protection cover(s).

 Direct exposure to the beam is to be avoided, i.e. do not look into

unterminated optical ports or at fibers that connect to unknown sources.

10  Copyright DEV Systemtechnik GmbH 2004-2017

User Manual DEV 1951

Un iv ers al S w itch C h ass is

Lo cal

Re m o te

DE V 19 51

Au to

1 2 3

4

3 Product Description

With the DEV 1951, DEV Systemtechnik has developed a modular design principle
for a universal dual channel switch chassis. A variety of different switch modules is
available that can be installed in the two slots of the device. A selection of passive
splitter modules and of distribution amplifier modules for ASI/SDI signals is avail­able as well. Please refer to chapter 3.2 for the description of the single modules.
A device panel (chapter 3.1.1) permits the monitoring and the local control of the
DEV 1951. Some other methods for the control and for the surveillance of the
device are provided (chapter 3.1.2). The application of sensing switch modules and
of digital signal switch modules enables additional autonomous switching
capabilities of the DEV 1951 (chapter 3.1.3) as well as the application of the TRAC
(stands for "Trap Receiver Action Controller") option (chapter 3.1.4).

3.1 Features and Options

3.1.1 Device Panel

The DEV 1951 provides a device panel at the front side of the chassis. A mode push
button and three yellow LEDs are located at the left side:

The mode push button (1) permits the change of the operation mode (please refer
to chapter 5.1) at the device. By pressing and holding the button for ~3 seconds the
status of the LEDs advances, i.e. always only one of the operation mode LEDs
"Auto" (2), "Local" (3), or "Remote" (4) is on.

Note:

 Products with the preceding version of the device panel are providing a "Local"

push button (instead of the mode push button) and a single "Remote" LED (i.e.
there is no explicit "Local" or "Auto" LED). The behavior of the push button and
the LED differs: The "Local" push button realizes the same functionality as the
mode push button but the device can be toggled between Local Mode ("Remote"
LED off) and Remote Mode or Auto Mode ("Remote" LED on) and vice versa,
only. Switching from Local Mode via the "Local" push button toggles to the
preceding mode (Remote Mode or Auto Mode) which was activated before the
device had been switched to Local Mode. The explicit activation of Remote
Mode or of Auto Mode is performed via Web Interface (chapter 5.5.2), or via
SNMP (chapter 5.9.4.3.1), or via Sandar Prosan protocol (chapter 5.6.3.6).

 Moreover, even older revisions of the DEV 1951 additionally provide a "Reset"

push button located left to the "Remote" LED and to the "Local" push button. This

 Copyright DEV Systemtechnik GmbH 2004-2017 11

"Reset" button is not supported by the firmware of the device. Please do not
operate the button it might have an impact on the behavior of the installed
switch modules!

User Manual DEV 1951

In A In B

Ch 1

Individ ual

Simultane ous

5

6

7

In A In B

Ch 2

The second functionality of the mode (or "Local") push button is the event
acknowledgment: If there are pending and not acknowledged event(s), this is
indicated –in addition to the alarm connector, please refer to chapter 6.1.2- at the
device panel via continuous alternate blinking of all channel LEDs, the "Individual"
LED, and the "Simultaneous" LED (see below). To acknowledge the event(s) (i.e. to stop
the event indication and thus the blinking of the LEDs at the device panel), the
mode push button is to be operated. Thus, three scenarios for the behavior of the
mode push button are to be considered:

1. There are no pending and not acknowledged event(s):
In this case, the operation mode can be altered as described above.

2. There are pending and not acknowledged event(s) in Local Mode:
In this case, a short operation of the push button acknowledges the event(s).
After that, the operation mode can be altered as described above.

3. Pending and not acknowledged event(s) in Remote Mode (or Auto Mode):
In this case, a short operation of the push button acknowledges the event(s)
and switches the device to Local Mode. After that, the operation mode can be
altered as described above.

Note:

 The type of event causing the event indication can be identified via Web

Interface or via remote interface, only.

 If an event is not acknowledged and if the event disappears (e.g. a detected

missing AC line is working again), the event indication will stop automatically (if
it is the sole event).

 The event indication cannot be stopped if no switch (or distribution amplifier)

module is installed or detected within the device.

In the middle of the device panel, the following elements are located:

 the channel push buttons and the green channel LEDs (5 & 7) and
 the switching mode push button and the yellow LEDs (6) for the Simulta-

neous/Individual switching mode functionality (please refer to chapter 5.1.4):

With the channel push buttons labeled "Ch 1" and "Ch 2", one of the two (input) ports
(primary (input) port "In A" or secondary (input) port "In B") of a switch module can
be switched to the common (output) port in Local Mode (!). The (input) port that is
currently active is indicated via the related green channel LED.
To alter the routing of a single switch module via the related channel push button
make sure that the device is in Local Mode and that the "Individual" LED is lit. After
the operation of the desired channel push button, the LED display will indicate the
altered switching position as a receipt.

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User Manual DEV 1951

Po w er S u pply 1
Po w er S u pply 2
Fa ilure

8 9 10

If the "Simultaneous" LED is lit (for the preconditions to activate Simultaneous
switching mode please refer to chapter 5.1.4), any of the two channel push buttons
can be operated to initiate the switching of the two installed switch modules.

Note:

 If the device is equipped with a single switch module only, the channel push

button of the empty slot will not work. In addition, the Simultaneous switching
mode is not available.

Three LEDs located at the device panel on the right are signalizing the power supply
operating status of the device:

 "Power Supply 1" LED ((8), green) and "Power Supply 2" LED ((9), green):

The related power supply unit provides secondary voltage if this LED is on.

 "Failure" LED ((10), red): This LED is on if either power supply unit does not

deliver any secondary voltage. The reason for this can be a defective power
supply, a defective primary protection fuse, or a missing primary voltage.

3.1.2 Communication Features

In addition to the device panel there are provided some options for the monitoring
and control of the product:
The standard digital interface of the DEV 1951 features basic remote switching
functionality permitting the control of the device, e.g. via a PLC (Programmable
Logic Control), please refer to chapter 5.4.
The Web Interface (chapter 5.5) provides features for checking the health status
and for changing the setup of the device; it enables full control in terms of
switching and in terms of setting up specific parameters. Additionally, the features
Time Based Switching and TRAC (if installed), and -for devices with installed sensing
switch modules- the recording functionality are accessible.
The implementation of SNMP (Simple Network Management Protocol) via the
Ethernet interface is intended to serve as the standard for remote monitoring and
control of the device (chapter 5.9).
In addition, a Communication Protocol Handler (CPH) is implemented which
enables the use of one of the following remote protocols with different monitoring
and control capabilities:

 Sandar Prosan protocol via serial interface (chapter 5.6);
 Leitch protocol via serial interface and via Ethernet interface (chapter 5.7); and
 QEC protocol via serial interface and via Ethernet interface (chapter 5.8).

The installation of sensing switch modules and of digital signal switch modules
enables the autonomous switching capability (chapter 3.1.3) of the device based on
the signal quality. Moreover, the TRAC option (chapter 3.1.4) permits a remote
device to control the switching of the DEV 1951.

 Copyright DEV Systemtechnik GmbH 2004-2017 13

User Manual DEV 1951

3.1.3 Autonomous Switching and Options

Among the broad choice of other switch modules, the DEV 1951 can be equipped
with one or two sensing switch modules or with one or two digital signal switch
modules; a mix of both types of switch modules is supported as well.
The sensing switch modules (and the digital signal switch modules) are special since
they permit the device to switch autonomously (please refer to chapter 5.1.3)
based on the RF level information (and on the digital signal quality information,
respectively) at both input ports of the module.
By default, the DEV 1951 provides autonomous switching capability from the
primary to the secondary input port(s).
With Option 22, the DEV 1951 is delivered with the main backup swap feature, i.e.
the autonomous switching works in both directions instead of switching from the
primary to the secondary input port(s), only.
With Option 28 the DEV 1951 is delivered with the automatic switch back feature
which permits the autonomous switching in both directions as well, but with an
adjustable hysteresis (for sensing switch modules) or with an adjustable delay (for
digital signal switch modules) when switching back from the secondary to the
primary input port(s).
The Web Interface enables the adjustment of the RF threshold levels for each input
port of a sensing switch module and enables the modification of settings for the
automatic switch back option.

3.1.4 TRAC Option

The product can be equipped with the TRAC (stands for Trap Receiver Action
Controller) option (Option 37), which permits the remote controlled switching of
the product based on SNMP traps, or based on the availability or on the absence of
a remote device (IP Monitoring). For more details, please refer to chapter 5.5.7.3.4.

14  Copyright DEV Systemtechnik GmbH 2004-2017

User Manual DEV 1951

Out

In A

In B

Monitor

In B

Mon ito r

Ou t In A

DE V 1 1-000 5

3.2 Modules Description

This paragraph points out the functionality of the modules that were designed for
the DEV 1951. There are available electrical and optical switch modules, passive
splitter modules, and distribution amplifier modules for ASI/SDI signals.
The modules described in the following can be removed, installed, and/or ex­changed even during the operation of the device. Knurled head screws are pro­vided on each module, which can be operated easily.
A short listing of the available DEV 1951 modules is provided here for reference:

3.2.1 DEV 11–0005 - DPST Switch Module with Monitor Port; 47…1006 MHz; 75 Ohm, BNC (f)

3.2.2 DEV 11–0009 - DPST Switch Module; DC…2500 MHz; 50 Ohm, N (f)

3.2.3 DEV 11–0010 - DPST Sensing Switch Module; DC, 950…2150 MHz; 75 Ohm, F (f)

3.2.4 DEV 11–0011 - DPST Sensing Switch Module; DC, 47…1006 MHz; 75 Ohm, F (f)

3.2.5 DEV 11–0024 - DPST Relay Switch Module with Termination; DC…18 GHz; 50 Ohm, SMA (f)

3.2.6 DEV 11–0027 - Relay Transfer Switch Module; DC…18 GHz; 50 Ohm, SMA (f)

3.2.7 DEV 11–0028 - DPST Switch Module; DC, 47…2500 MHz; 75 Ohm, F (f)

3.2.8 DEV 11–0033 - DPST Relay Switch Module; DC…18 GHz; 50 Ohm, SMA (f)

3.2.9 DEV 11–0050 - DPST Switch Module; DC…2500 MHz; 50 Ohm, SMA (f)

3.2.10 DEV 11–0057 - Transfer Switch Module; DC…1006 MHz; 75 Ohm, BNC (f)

3.2.11 DEV 11–0058 - DPST Sensing Switch Module; DC, 950…2150 MHz; 50 Ohm, SMA (f)

3.2.12 DEV 11–0107 - DPST High Power Sensing Switch Module; DC, 950…2150 MHz; 75 Ohm, F (f)

3.2.13 DEV 11–0108 - DPST High Power Sensing Switch Module; DC, 47…1006 MHz; 75 Ohm, F (f)

3.2.14 DEV 13–0169 - 1:4/4:1 Splitter/Combiner Module, Passive; 47…1006 MHz; 75 Ohm, F (f)

3.2.15 DEV 13–0170 - 1:4/4:1 Splitter/Combiner Module, Passive; 950…2150 MHz; 75 Ohm, F (f)

3.2.16 DEV 13–0171 - 1:4/4:1 Splitter/Combiner Module, Passive; 950…2150 MHz; 50 Ohm, SMA (f)

3.2.17 DEV 13–0174 - 1:2/2:1 Splitter/Combiner Module, Passive; 950…2150 MHz; 75 Ohm, F (f)

3.2.18 DEV 14–0014 - Ethernet 2:1/1:2 Switch Module

3.2.19 DEV 14–0087 - DPST Switch Module with DA 1:3; ASI; 75 Ohm, BNC (f)

3.2.20 DEV 14–0088 - DPST Switch Module with DA 1:3; ASI / HD-SDI; 75 Ohm, BNC (f)

3.2.21 DEV 14–0091 - Distribution Amplifier 1:3; ASI; 75 Ohm, BNC (f)

3.2.22 DEV 14–0093 - DPST Switch Module with DA 1:3; ASI / 3G-SDI; 75 Ohm, BNC (f)

3.2.23 DEV 14–0095 - Distribution Amplifier 1:3; ASI / 3G-SDI; 75 Ohm, BNC (f)

3.2.24 DEV 14–0102 - Distribution Amplifier 1:3; ASI / HD-SDI; 75 Ohm, BNC (f)

3.2.25 DEV 14–0110 - DPST Switch Module with DA 1:3; E1/T1; 75 Ohm, BNC (f)

3.2.26 DEV 7462 - 1:2 Optribution® Switch; 1260…1360 nm, 1510…1610 nm; SC/APC

3.2.27 DEV 7463 - 1:2 Optribution® Switch; 1260…1610 nm; SC/APC

3.2.1 DEV 11–0005

DPST Switch Module with Monitor Port; 47…1006 MHz; 75 Ohm, BNC (f)

The output port ("Out") can be switched to one of two input ports ("In A", "In B"). The
unused input port is terminated internally. The transmission is DC blocked. Failsafe
relays are used for switching. In the case of power loss, the primary input port
("In A") is routed to the output port. For measurement purposes, the monitoring
output port ("Monitor") is available.

 Copyright DEV Systemtechnik GmbH 2004-2017 15

User Manual DEV 1951

In A

In B

Out

Ou tIn B In A

DE V 1 1-000 9

Lo gic

Out

In A

In B

External
Controller

In A

Ou t

In B

DE V 1 1-001 0

Lo gic

Out

In A

In B

External
Controller

In A

Ou t

In B

DE V 1 1-001 1

3.2.2 DEV 11-0009

DPST Switch Module; DC…2500 MHz; 50 Ohm, N (f)

The common port ("Out") can be switched to one of two input/output ports ("In A",
"In B"). The unused input/output port is terminated internally. Latching relays are
used for switching.

3.2.3 DEV 11-0010

DPST Sensing Switch Module; DC, 950…2150 MHz; 75 Ohm, F (f)

Two input ports ("In A", "In B") can be switched to one output port ("Out"). The
unused input port is terminated internally. The module is able to pass an external
10 MHz reference signal.
The module provides RF level monitoring, i.e. the RF level of both input ports is
measured and is compared with (adjustable) RF threshold levels. This enables the
functionality to indicate an event (if the present input signal levels are below a
threshold level), and/or permits the DEV 1951 to control the switching
autonomously.

3.2.4 DEV 11-0011

DPST Sensing Switch Module; DC, 47…1006 MHz; 75 Ohm, F (f)

The functionality of the module DEV 11-0011 is identical with the module
DEV 11-0010 (please refer to chapter 3.2.3), but the module is designed for a
different frequency range.

16  Copyright DEV Systemtechnik GmbH 2004-2017

User Manual DEV 1951

Com

In A

In B

In BIn A

Co m

DE V 1 1-002 4

In A

In B

Out A

Out B

DE V 1 1-002 7

In A

Ou t A

Ou t B

In B

In A

In B

Out

In A

Ou t

In B

DE V 1 1-002 8

3.2.5 DEV 11-0024

DPST Relay Switch Module with Termination; DC…18 GHz; 50 Ohm, SMA (f)

The common port ("Com") of this high performance relay switch module can be
switched to one of two input/output ports ("In A", "In B"). The unused input/output
port is terminated internally.

3.2.6 DEV 11-0027

Relay Transfer Switch Module; DC…18 GHz; 50 Ohm, SMA (f)

The port "In A" of the high performance relay switch module is connected either to
the port "Out A" or to the port "Out B". In the latter case, the port "In B" is connected
to the port "Out A", otherwise to the port "Out B".

Note that logically, this transfer switch module is handled like any other 2:1 (DPST)
switch, i.e. the representation in the Web Interface, via SNMP, and via all CPH
protocols corresponds to a 2:1 switch even though the signal routing is realized as
described above.

3.2.7 DEV 11-0028

DPST Switch Module; DC, 47…2500 MHz; 75 Ohm, F (f)

The common port ("Out") can be switched to one of two input/output ports ("In A",
"In B"). The unused input/output port is terminated internally. The module is able to
pass an external 10 MHz reference signal.

 Copyright DEV Systemtechnik GmbH 2004-2017 17

User Manual DEV 1951

In A

In B

Com

In BIn A

Co m

DE V 1 1-003 3

In A

In B

Out

Ou t

In A In B

DE V 1 1-005 0

In A

In B

Out A

Out B

In A Ou t A In B Ou t B

DE V 1 1-005 7

3.2.8 DEV 11-0033

DPST Relay Switch Module; DC…18 GHz; 50 Ohm, SMA (f)

The common port ("Com") of this high performance relay switch module can be
switched to one of two input/output ports ("In A", "In B").

3.2.9 DEV 11-0050

DPST Switch Module; DC…2500 MHz; 50 Ohm, SMA (f)

The common port ("Out") can be switched to one of two input/output ports ("In A",
"In B"). The unused input/output port is terminated internally. Latching relays are
used for switching.

Note:

 The DEV 11-0050 is the successor of the DEV 11-0007.

3.2.10 DEV 11-0057

Transfer Switch Module; DC…1006 MHz; 75 Ohm, BNC (f)

The port "In A" of the module is connected either to the port "Out A" or to the port
"Out B". In the latter case, the port "In B" is connected to the port "Out A", otherwise
to the port "Out B".

Note that logically, this transfer switch module is handled like any other 2:1 (DPST)
switch, i.e. the representation in the Web Interface, via SNMP, and via all CPH
protocols corresponds to a 2:1 switch even though the signal routing is realized as
described above.

18  Copyright DEV Systemtechnik GmbH 2004-2017

User Manual DEV 1951

Lo gic

Out

In A

In B

External
Controller

Ou t

In A In B

DE V 1 1-005 8

Lo gic

Out

In A

In B

External
Controller

In A

Ou t

In B

DE V 1 1-010 7

Lo gic

Out

In A

In B

External
Controller

In A

Ou t

In B

DE V 1 1-010 8

3.2.11 DEV 11-0058

DPST Sensing Switch Module; DC, 950…2150 MHz; 50 Ohm, SMA (f)

The functionality of the module DEV 11-0058 is identical with the module
DEV 11-0010 (please refer to chapter 3.2.3), but the module is designed for 50 Ohm
with SMA connectors (instead of 75 Ohm with F connectors).

3.2.12 DEV 11-0107

DPST High Power Sensing Switch Module; DC, 950…2150 MHz; 75 Ohm, F (f)

The functionality of the module DEV 11-0107 is identical with the module
DEV 11-0010 (please refer to chapter 3.2.3), but the module is designed for high
power signals.

3.2.13 DEV 11-0108

DPST High Power Sensing Switch Module; DC, 47…1006 MHz; 75 Ohm, F (f)

The functionality of the module DEV 11-0108 is identical with the module
DEV 11-0010 (please refer to chapter 3.2.3), but the module is designed for a
different frequency range and for high power signals.

 Copyright DEV Systemtechnik GmbH 2004-2017 19

User Manual DEV 1951

In

Out 1
Out 2
Out 3
Out 4

InOu t 2Ou t 1 Ou t 3 Out 4

In

Out 1
Out 2
Out 3
Out 4

InOu t 2Ou t 1 Ou t 3 Out 4

In

Out 1
Out 2
Out 3
Out 4

InOu t 2Ou t 1 Ou t 3 Out 4

In

Out 1
Out 2

Ou t 1 O ut 2

DE V 1 3-017 4

In

3.2.14 DEV 13-0169

1:4/4:1 Splitter/Combiner Module, Passive; 47…1006 MHz; 75 Ohm, F (f)

This module for splitting or combining RF signals can be applied to a DEV 1951
equipped with a single switch module.

3.2.15 DEV 13-0170

1:4/4:1 Splitter/Combiner Module, Passive; 950…2150 MHz; 75 Ohm, F (f)

This module for splitting or combining RF signals can be applied to a DEV 1951
equipped with a single switch module.

3.2.16 DEV 13-0171

1:4/4:1 Splitter/Combiner Module, Passive; 950…2150 MHz; 50 Ohm, SMA (f)

This module for splitting or combining RF signals can be applied to a DEV 1951
equipped with a single switch module.

3.2.17 DEV 13-0174

1:2/2:1 Splitter/Combiner Module, Passive; 950…2150 MHz; 75 Ohm, F (f)

This module for splitting or combining RF signals can be applied to a DEV 1951
equipped with a single switch module.

20  Copyright DEV Systemtechnik GmbH 2004-2017

User Manual DEV 1951

1:1 Pa tc h C ab le

1

8

In A

In B

Out

1:1 Pa tc h C ab le

1:1 Pa tc h C ab le

1

8

1

8

8

1

8

1

8

1

Ou t

DE V 1 4-001 4

In A In B

Out 1

Po s 0:withou t elec trica l po wer
Po s 1:with electrical pow er In A selec te d
Po s 2:with electrical pow er In B selec te d
(stat e sh own he re )

Out 2

In A

In B

Out 3

Ex te rn al
Co ntro ller

Lo gic

CD

CD

1,2

0 0

1,2

2

1

In A In B Ou t 1 Out 2 Out 3

DE V 1 4-008 7

Out 1

Po s 0:withou t elec trica l po wer
Po s 1:with electr ical pow er In A selec ted
Po s 2:with electr ical pow er In B selec ted
(stat e sh own he re )

Out 2

In A

In B

Out 3

Ex te rn al
Co ntro ller

Lo gic

CD

CD

1,2

0 0

1,2

2

1

In A In B Ou t 1 Ou t 2 O ut 3

DE V 1 4-008 8

3.2.18 DEV 14-0014

Ethernet 2:1/1:2 Switch Module

The module is designed for Ethernet switching applications and is equipped with
three RJ-45 Ethernet connectors in order to select physically one of two routes.

3.2.19 DEV 14-0087

DPST Switch Module with DA 1:3; ASI; 75 Ohm, BNC (f)

The module is designed for ASI signal applications. Normally one of the two input
signals is routed to the three separately amplified output ports. In the case of
power loss, the primary input port ("In A") is routed only to the first output port
("Out 1") and the other output ports do not carry any signal.
The unused input port is terminated internally. Electronic switches and a failsafe
relay are used for switching.

Note:

 The DEV 14-0087 is the successor of the DEV 14-0001.

3.2.20 DEV 14-0088

DPST Switch Module with DA 1:3; ASI / HD-SDI; 75 Ohm, BNC (f)

The functionality of the module DEV 14-0088 is identical with the module
DEV 14-0087 (please refer to chapter 3.2.19), but the module is designed for
SD-SDI and HD-SDI signals in addition to ASI signals.

Note:

 Output port 1 ("Out 1") delivers an inverted ASI signal!

 Copyright DEV Systemtechnik GmbH 2004-2017 21

User Manual DEV 1951

Out 1

Po s 0:withou t ele ctrica l p ower
Po s 1:with electr ical pow er
(stat e sh own h ere)

Out 2

In

Out 2

Ex te rn al
Co ntro ller

Lo gic

CD

1

0 0

1

In Ou t 1 Out 2 O ut 3

DE V 1 4-009 1

Out 1

Po s 0:withou t elec trica l po wer
Po s 1:with electrical pow er In A selec te d
Po s 2:with electrical pow er In B selec te d
(stat e sh own he re )

Out 2

In A

In B

Out 3

Ex te rn al
Co ntro ller

Lo gic

CD

CD

1,2

0 0

1,2

2

1

In A In B Ou t 1 Out 2 O ut 3

DE V 1 4-009 3

Out 1

Po s 0:withou t electrica l p ower
Po s 1:with electr ical pow er
(stat e sh own h ere)

Out 2

In

Out 2

Ex te rn al
Co ntro ller

Lo gic

CD

1

0 0

1

In Ou t 1 Out 2 O ut 3

DE V 1 4-009 5

3.2.21 DEV 14-0091

Distribution Amplifier 1:3; ASI; 75 Ohm, BNC (f)

The module is designed to distribute and to amplify ASI signals. Normally the input
signal is routed to the three separately amplified output ports. In the case of power
loss, the input signal is routed only to the first output port ("Out 1") and the other
output ports do not carry any signal.

3.2.22 DEV 14-0093

DPST Switch Module with DA 1:3; ASI / 3G-SDI; 75 Ohm, BNC (f)

The functionality of the module DEV 14-0093 is identical with the module
DEV 14-0087 (please refer to chapter 3.2.19), but the module is designed for
SD-SDI, HD-SDI, and 3G-SDI signals in addition to ASI signals.

Note:

 Output port 1 ("Out 1") delivers an inverted ASI signal!

3.2.23 DEV 14-0095

Distribution Amplifier 1:3; ASI / 3G-SDI; 75 Ohm, BNC (f)

The functionality of the module DEV 14-0095 is identical with the module
DEV 14-0091 (please refer to chapter 3.2.21), but the module is designed for
SD-SDI, HD-SDI, and 3G-SDI signals in addition to ASI signals.

Note:

 Output port 1 ("Out 1") delivers an inverted ASI signal!

22  Copyright DEV Systemtechnik GmbH 2004-2017

User Manual DEV 1951

Out 1

Po s 0:withou t ele ctrica l p ower
Po s 1:with electr ical pow er
(stat e sh own h ere)

Out 2

In

Out 2

Ex te rn al
Co ntro ller

Lo gic

CD

1

0 0

1

In Ou t 1 Out 2 O ut 3

DE V 1 4-010 2

Out 1

Po s 0: withou t ele ctrica l p ower
Po s 1: with elec trical po w er I n A sele cted
Po s 2: with elec trical po w er I n B sele cted

Out 2

In A

In B

Out 3

Ex te rn al
Co ntro ller

Lo gic

CD

CD

1,2

0 0

1,2

2

1

Sw itch

Lo gic

In A In B

Ou t 1 Ou t 2 O ut 3

DE V 1 4-011 0

A

B

Com

Optical S w itch

Op tic al Fib er

Ex te rn al
Co ntro ller

Lo gic

Op tic al Fib er

Op tic al Fib er

Com

A B

3.2.24 DEV 14-0102

Distribution Amplifier 1:3; ASI / HD-SDI; 75 Ohm, BNC (f)

The functionality of the module DEV 14-0102 is identical with the module
DEV 14-0091 (please refer to chapter 3.2.21), but the module is designed for
SD-SDI and HD-SDI signals in addition to ASI signals.

Note:

 Output port 1 ("Out 1") delivers an inverted ASI signal!

3.2.25 DEV 14-0110

DPST Switch Module with DA 1:3; E1/T1; 75 Ohm, BNC (f)

The module is designed for E1 or T1 signal applications. Normally one of the two
input signals is routed to the three separately amplified output ports. In the case of
power loss, the primary input port ("In A") is routed only to the first output port
("Out 1") and the other output ports do not carry any signal.
The unused input port is terminated internally.

3.2.26 DEV 7462

1:2 Optribution® Switch; 1260…1360 nm, 1510…1610 nm; SC/APC

The module is a switch for optical signals. The optical common port ("Com") can be
switched to one of the two optical input/output ports ("A", "B"). The module is
shown here with the E2000 HRL connector option; other optical connector types
are available alternatively.

 Copyright DEV Systemtechnik GmbH 2004-2017 23

User Manual DEV 1951

A

B

Com

Optical S w itch

Op tic al Fib er

Ex te rn al
Co ntro ller

Lo gic

Op tic al Fib er

Op tic al Fib er

Com

A B

Uni vers al S wit ch C ha ssis

Loc al

Rem ote

DEV 19 51

In A I n B

Ch 1

Indi vidu al

Sim ulta neo us

Aut o

Pow er Sup ply 1
Pow er Sup ply 2
Fail ure

1

5

6

7

8 9 102 3

4

In A I n B

Ch 2

1

Mode push button

2

Yellow LED indicating "Auto" Mode

3

Yellow LED indicating "Local" Mode

4

Yellow LED indicating "Remote" Mode

5

Channel push button and green LEDs "In A" & "In B" for the primary channel "Ch 1"

6

Switching mode push button and yellow LEDs "Simultaneous" & "Individual"

7

Channel push button and green LEDs "In A" & "In B" for the secondary channel "Ch 2"

8

Green LED indicating the operation of "Power Supply 1"

9

Green LED indicating the operation of "Power Supply 2"

10

Red LED indicating a "Failure" of one of the power supplies

WA RN IN G:

Disc onne ct p owe r
befo re op enin g!

1 2 3

4 5

6

7

8 9 10

Fus e 2 A T Fus e 2 A T

100 ...2 40 V

50... 60 H z
40 V A

11

In B

Mon ito r

Out In A

DEV 11 -00 05

In B

Mon ito r

Out In A

DEV 11 -00 05

Alar m DIG /In R S 232 Eth ern et

Cha nne l 2Cha nne l 1

1

Grounding bolt

2

AC plug for power supply unit 1

3

Fuse for power supply unit 1

4

AC plug for power supply unit 2

5

Fuse for power supply unit 2

6

"Alarm" connector, Sub-D 9 (m)

7

"Dig/In" connector, Sub-D 9 (f) for the digital interface

8

"RS 232" connector, Sub-D 9 (f) for the serial interface

9

"Ethernet" connector, RJ-45

10

Module slot "Channel 1" (here equipped with a DEV 11-0005 switch module )

11

Module slot "Channel 2" (here equipped with a DEV 11-0005 switch module )

3.2.27 DEV 7463

1:2 Optribution® Switch; 1260…1610 nm; SC/APC

The functionality of the DEV 7463 (here shown with the FC/APC connector option)
is identical with the DEV 7462 (please refer to chapter 3.2.26), but the module is
designed for a different optical wavelength range.

3.3 Product Drawings

Front View:

Rear View:

24  Copyright DEV Systemtechnik GmbH 2004-2017

User Manual DEV 1951

WA RNING:

Disc onn ect pow e r
be fo re o pen in g!

1 2 3

4 5

6

7

8 9

Fuse 2 A T Fuse 2 A T

10 0...2 40 V

50 ...60 Hz

40 V A

Alarm

DIG /In R S 232

Ethernet

4 Installation Instructions

4.1 Scope of Delivery

1 * DEV 1951 equipped with switch modules, distribution amplifier modules,
splitter modules, and other options,

as ordered
1 * User Manual (this document)

4.2 Installation of the Product

4.2.1 Mechanical Integration of the Product

Please refer to the warnings in chapter 2.3 regarding the mechanical integration of
the product. For the integration in a 19" rack, the rack slots must be prepared with
rails for the chassis. After inserting the chassis in the rack, fix the chassis with four
screws to the rack at its rack mount flanges.

4.2.2 Grounding, Data Cables, Alarm Cable, and Power Connection

For the warnings with respect to "Grounding, AC Connection, Cables" please refer
to chapter 2.3.
The chassis needs to be connected to the 19" rack via a ground wire. The grounding
bolt is located on the left at the rear side of the product:

Take off the upper nut and the first washer of the grounding bolt (labeled 1 in the
figure above) and connect the grounding cable, which must have a ring tongue
terminal matching for the M4 fastening bolt. After that, the washer and the nut
have to be tightened again.

Next, establish the external Ethernet connection by plugging an Ethernet cable
from your network to the "Ethernet" port (9) of the device.

If the basic network setup via serial interface (chapter 4.4.2.2) is required, and/or if
it is intended to control the device via the serial interface using Sandar Prosan pro­tocol, Leitch protocol, or QEC protocol, a serial connection between a PC and the
serial connector labeled "RS 232" (8) is to be established using a 1:1 cable. The
configuration of the serial interface is described in chapter 4.4.1.

If it is intended to control the DEV 1951 via the digital interface (chapter 5.4),
connect a prepared cable to the connector labeled "DIG/In" (7); the pin assignment
of the digital interface connector is stated in chapter 7.

If required, connect a prepared cable to the connector labeled "Alarm" (6); the pin
assignment of the alarm connector is subject of chapter 7 as well.

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Finally, connect two power cords to the primary connectors (2 & 4). It is recom­mended to use two separately fused phases of the available electrical outlets.

Note:

 It is highly recommended to power up the device after the installation of the

modules (chapter 4.2.5) and after the connection of all signal cables (chapters

4.2.3 & 4.2.4).

 The power lines are fused separately; the fuse holders (3 & 5) are located

below the related power inlet (2 & 4). If a fuse has to be exchanged, unplug the
device completely and use 2 A T 5*20 mm glass fuses for replacement only!

4.2.3 Connection of Optical Cables

Only if the DEV 1951 is equipped with optical switch modules DEV 7462 and/or
DEV 7463, optical fibers have to be connected to the installed optical modules.

Please refer to the laser safety warnings stated in chapter 2.3!
If applicable, apply strain relieves to the optical fibers which are to be connected to

the installed optical modules in a way, that the connectors of the optical modules
are not stressed mechanically.

Sequentially, remove each optical connector protection cover at the device, and
plug in and tighten the corresponding connector from the optical fiber bundle(s).

Note:

 The optical modules are available with different optical connector types, i.e.

FC/APC, E2000 HRL, or SC/APC.
Make sure, that the matching connectors are installed in the application.

4.2.4 Connection of RF Signal Cables

Apply strain relieves to the external RF signal cables which are to be connected in a
way, that the connectors of the device are not stressed mechanically.

When connecting RF cables to the installed modules, each connector providing a
thread is to be tightened with a torque wrench. For 75 Ohm F connectors the
applied torque should not exceed 4.5 Nm (39.8 lbf-in). In case of 50 Ohm
SMA connectors or N connectors, a torque wrench adjusted to 1 Nm (8.85 lbf-in) is
to be used. If a module is equipped with BNC connectors, make sure that the
bayonet of each RF connection is locked.

Note:

 For 75 Ohm RF connectors, either female 75 Ohm BNC connectors or female

precision F connectors are applied. Make sure, that the applied connectors are
male 75 Ohm BNC connectors or male precision F connectors (with thin inner
conductor).

 Each unused output port of a passive splitter module or of a distribution

amplifier module is to be terminated with an appropriate load (i.e. 50 Ohm
SMA (m), 75 Ohm F (m), or 75 Ohm BNC (m)) to achieve best amplitude
frequency response.

 If all cables are connected, the device can be powered up.

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4.2.5 Installation and Exchange of Modules

The product is usually delivered with the ordered modules, which are already
installed. Therefore, you may proceed in reading the next chapter.
In case that a module has to be exchanged or if the DEV 1951 is to be upgraded
with an additional module, the following instructions are to be noticed:
Note:

 Though the exchangeable modules are hot pluggable, it is recommended to

power down the device for exchange operations to avoid short circuits and for
safety reasons. There may be situations where a longer lasting interruption of
the signal transmission is not permitted, so -for instance- an exchange of a
power supply module has to be performed while the device is powered up. In
this situation, the operations as described below can be performed without
problems, but have to be carried out with the utmost caution.

 After removing, adding, or exchanging a switch module (or a distribution

amplifier module) while the device is powered up, the device is to be restarted
to update the controller regarding the applied changes.
This can be done without interruption of the signal transmission.

 If exchanging or installing optical modules, please especially refer to the

warnings regarding laser safety stated in chapter 2.3.

 Note that in rare cases the insertion of a switch module may cause an auto-

matic device reset.

 The device is to be equipped with at least one switch module (or one distribu-

tion amplifier module). If not a single switch (or distribution amplifier) module
is installed or detected, the device signalizes this by a permanent event

indication (please refer to chapters 3.1.1 & 6.1.2).
Removal of a module:
Any cable attached to the front side of the module is to be disconnected it in the

first step. For the removal, unscrew the two knurled head screws of the module (or
of the blind plate) before gently pulling out the module completely (or before
taking off the blind plate).

Installation of a module:
In the first step, plug in the module by inserting it into the two card guides of the

desired slot and by gently pushing the module into the chassis that it levels with the
rear side of the device. Screw in the two knurled head screws of the module, next.
Finally, (re-) connect the corresponding cables to the module.

4.2.6 Reset of the Device and the Restore of Factory Defaults

During power-up or after a restart the controller of the device performs a health
check and scans the assemblies of the device, e.g. to detect whether a module is
installed in a slot or not. If there is a module installed, the settings for this slot are
transferred to the module. This implies that a reset is necessary only if changes on
the modules population of the device were performed or if there were applied ele­mentary changes, e.g. restoring the factory defaults via the Web Interface.

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A device reset can be performed in three different ways:

1. Reset via the switching mode push button at the device panel:

Press and hold the switching mode push button (labeled 6 in the figure of

chapter 3.1.1) for approximately ten seconds.

The reset command is accepted if the "Individual" LED and the "Simultaneous" LED

plus all channel LEDs are quickly alternately blinking (ten times).

2. Reset via the serial interface when terminating the configuration program

(chapter 4.4.2.2.1).

3. Reset via Web Interface (chapter 5.5.7.4.3).
Note:

 It takes about 60 seconds after a device reset or after a power cycle that the

device is completely accessible again via the device panel, via the digital inter-

face, via the serial interface, via Web Interface, and via the different remote

protocols, e.g. via SNMP.

 If the Web Interface does not react after a restart, then the ARP (Address Reso-

lution Protocol) cache of your computer may have to be cleared by opening a

command window and by typing: "arp –d<CR>" (<CR> stands for hitting the "Enter"

or "" key on the keyboard).

 If –for any reason– neither a device reset nor a power cycle restores all func-

tionality, a reset to factory defaults is to be considered.

The restore of the device factory settings (chapter 4.3) can be performed via

Web Interface (chapter 5.5.7.4.1) or within Configuration Mode:

4.2.7 Configuration Mode

The Configuration Mode was applied to enable the change of a few settings locally
via the device panel. These settings are:

 Special OIDs enabled/disabled

Within Configuration Mode some special OIDs can be configured to be acces-

sible via SNMP or not. Since this setting is customer-specific, it is not described

further in the context of this documentation.

It is recommended to leave this setting unchanged if not being aware of the

impact a change of this setting might have.

 Power supply monitoring enabled/disabled

If not ordered otherwise the power supply monitoring of the device is enabled.

This setting can be changed by issuing the Sandar Prosan command PMP0 (please

refer to chapter 5.6.3.9), via modifying the .errorEnableMask (chapter

5.9.4.4.2), or within Configuration Mode.

 Reset to factory defaults

The restore of the device factory settings (chapter 4.3) can be performed via

Web Interface (chapter 5.5.7.4.1) or within Configuration Mode.
To activate the Configuration Mode, press and hold the mode (or "Local") push but-

ton (chapter 3.1.1) either during power-up, or during the device reset process
(chapter 4.2.6).
At the end of the boot process (after approx. 60 seconds), the "Individual" LED and
the "Simultaneous" LED are continuously alternately blinking and the "Local" LED is on
for confirmation (for products with the preceding version of the device panel
providing only a single "Remote" LED, the "Remote" LED is off, respectively).

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Attention: Keep the mode (or "Local") push button pressed, releasing the button
will cause the device to leave the Configuration Mode.

 "Ch 1" push button:

This button is used for toggling between disabling the special OIDs (LED "In B" is

on) and enabling the special OIDs (LED "In A" is on).

Again, it is recommended to leave this setting unchanged, i.e. the special OIDs

are to be left disabled (LED "In B" is on)!

 "Ch 2" push button:

This button is used to toggle power supply monitoring between

disabled (LED "In B" is on) and enabled (LED "In A" is on).

 Switching mode push button (labeled 6 in the figure of chapter 3.1.1):

Pressing this button restores the device factory settings. The "Remote" LED is

turned on as a receipt.
After making the preferred settings, release the mode (or "Local") push button to

leave the Configuration Mode. This automatically initiates a device reset.

4.3 Device Factory Settings

The product is delivered with factory settings as described in the following.
It is possible to restore these settings, please refer to chapter 4.2.6.

4.3.1 Factory Settings for Sensing Switch Modules

All sensing switch modules provide RF level monitoring functionality. I.e. for both
input ports, the aggregated signal power level of the RF signal is measured and
compared with an RF threshold level. If the RF level is below the RF threshold level,
an event is triggered which is indicated e.g. via Web Interface. The factory setting
for the RF threshold level for each input port of a sensing switch module depends
on the lower limit of the applied sensing switch module:

RF threshold level: (20 dB above lower limit)
For example, if the lower limit is -50 dBm, the factory setting for the RF threshold

level is -30 dBm. The RF threshold level can be adjusted for each input port via the
Web Interface (please refer to chapter 5.5.4.1) or via SNMP (chapter 5.9.4.3.9.6) in
a range which depends on the applied sensing switch module.
Note that if an exchange module is inserted in a slot of the DEV 1951, the new
module inherits the stored settings of this slot (after a device reset).

4.3.2 Factory Communication Protocol Configuration

The factory setting for the Communication Protocol Handler (CPH) is the Leitch
protocol, i.e. the serial interface configuration are the standard serial interface
configuration settings, please refer to chapter 4.4.1.1.
Chapter 5.5.7.2.3 describes the change of the protocol assignment.

4.3.3 Factory Network Settings

The factory network settings of the device are:

IP-Address: 192.168.0.11
Netmask: 255.255.255.0
Gateway: 192.168.0.99

For changing the network setup, please refer to chapters 4.4.2.2 & 5.5.7.2.1.

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4.3.4 Factory SNMP Settings

The factory SNMP settings are configured as follows:

Read Community: public
Write Community: private

Local/Remote changeable via SNMP:

Additionally, the default community for all four Trap Destination IP Addresses is set
to public and all configurable traps are disabled. If an address is defined without
explicit port assignment, the standard SNMP trap port 162 is assigned implicitly.
For changing the SNMP setup, please refer to chapter 5.5.7.2.2.
There are software factory defaults for some SNMP objects, please refer to the
corresponding chapters:

 .application.controlMode chapter 5.9.4.3.1
 .application.portTable.portEntry.poEnable chapter 5.9.4.3.9.2
 .application.portTable.portEntry.poRfLimit chapter 5.9.4.3.9.6
 .surveillance.trapEnableMask chapter 5.9.4.4.1
 .surveillance.errorEnableMask chapter 5.9.4.4.2

4.3.5 Factory Sandar Prosan Protocol Settings

By default, the setting "Echo in Local Mode" is disabled. I.e. if the device is in Local
Mode, it does not respond to any Sandar Prosan command; please refer to chapter

5.6.1. This setting can be changed by issuing the Sandar Prosan command PME1
(chapter 5.6.3.8) or via Web Interface (chapter 5.5.7.2.3).

4.3.6 Factory Leitch Protocol Settings

By default, the setting "Echo in Local Mode" is disabled. I.e. in Local Mode, the
device responds with the Leitch Error Message to any valid Leitch command.
Furthermore the setting "Individual Switch Level Assignment" is enabled by default,
please refer to chapter 5.7.1. Both settings can be changed via Web Interface
(chapter 5.5.7.2.3).

4.3.7 Factory QEC Protocol Settings

The factory setting for the QEC serial address is 0x11 (decimal: 17).
Chapter 5.5.7.2.3 describes the change of this setting.

4.4 Communication Interface Configuration

Aside of the digital interface that permits the switching via dry contacts, two
hardware interfaces are provided for the communication with the device: a serial
interface and an Ethernet interface.
The serial interface can be used for the basic network setup and for the operation
via Sandar Prosan protocol, or via Leitch protocol, or via QEC protocol.
The Ethernet interface is used for the operation via Web Interface, via SNMP, and
via Leitch protocol or via QEC protocol through Telnet.

4.4.1 Serial Interface

The Sub-D 9 pos female connector labeled "RS 232" for the standard (3-wire) RS 232
interface is located at the rear side of the chassis; for the pin assignment please
refer to chapter 7.

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The serial interface of the device supports different remote protocols defined by
the CPH configuration. The default protocol assignment of the serial interface is
subject of chapter 4.3.2. The protocol assignment can be changed via Web Inter­face (chapter 5.5.7.2.3); there it is possible to deselect any CPH support as well.

4.4.1.1 Standard Serial Interface Configuration

The standard serial interface configuration is applied if the device is configured to
support none of the available CPH protocols (i.e. to support the network setup via
serial interface, only) or if the device is configured to support the Leitch protocol or
the QEC protocol. The standard serial interface configuration is described by the
following parameters:

Transmission rate: 9600
Data bits: 8
Parity check: none
Start/Stop bit: 1
Handshake: none

4.4.1.2 Sandar Prosan Protocol Serial Interface Configuration

The Sandar Prosan protocol serial interface configuration is applied if the device is
configured to support the Sandar Prosan protocol. The Sandar Prosan protocol
serial interface configuration is described by the following parameters:

Transmission rate: 9600
Data bits: 7
Parity check: odd
Start/Stop bit: 1
Handshake: none

4.4.2 Ethernet Interface

The connector labeled "Ethernet" located at the rear side of the chassis is an RJ-45
jack for the standard 100Base-TX Ethernet interface; chapter 7 describes the pin
assignment.

4.4.2.1 Ethernet Connection

If a standalone device is to be connected to a PC only, the connection can be estab­lished via a direct Ethernet cable (or through a local hub/switch) between the
Ethernet connector of the device and the Ethernet connector of the PC. The net­work setup of the PC is to be altered that it is in the same subnet as the device. If it
is intended to use the factory network settings, the IP address of the standalone PC
is to be set to 192.168.0.x, with x in the range 1…254, except 11, which is the address of
the device, e.g. set the IP address of the standalone PC to the default gateway
address 192.168.0.99.
If the device is to be connected to the local network, make sure to change the net­work setup as required. Ask your network administrator for the details on network
parameters which are to be used.
The factory network settings are subject of chapter 4.3.3.

There are two different methods to change the network setup. First, the network
setup can be changed via Web Interface (please refer to chapter 5.5.7.2.1). The
other method that can be performed is subject of the following chapter.

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4.4.2.2 Network Setup via the Serial Interface

Only a few elementary parameters of the network setup can be changed via the
serial interface.
First, establish a hardware connection between a serial port of a PC (e.g. COM1)
and the RS 232 interface of the device (i.e. the connector labeled "RS 232" at the
chassis) using a straight cable; please refer to chapter 7 for the pin assignment of
the serial connector.
Next, start a terminal application (e.g. MS Windows HyperTerminal) on your PC.

Note:

 The interface settings of the terminal application have to match the standard

serial interface configuration (chapter 4.4.1.1); otherwise, it is not possible to

enter the configuration program as described below.

 The terminal application is to be configured that the "Backspace" or "←" key on

the keyboard works properly in the application, and that it sends a <CR> only

(and not a <CR><LF>) when hitting the "Enter" or "" key on the keyboard.

If using MS Windows HyperTerminal, select the "Properties" entry from the

"File" menu and click on the "Settings" tab. There, select "ANSI" from the

Emulation drop down list and then click on the button to

uncheck "Send line ends with line feeds" as shown in the following figure:

4.4.2.2.1 Start and Termination of the Configuration Program

If the serial interface is used for the communication via one of the CPH protocols,
the access to the configuration program can be established during power-up or
after a device reset, only.
In this case, the terminal application is to be started and is to be connected (with
the standard serial interface configuration settings, please refer to chapter 4.4.1.1)
before the boot phase.

While the device is booting press and hold (max. 60 seconds) the keys <Ctrl> and T
(i.e. <Ctrl>-T) in parallel on the keyboard until the following message appears:

please release key

After releasing the keys, the following text is displayed:

You have 60 seconds for login...

DEV login:

To start the configuration program the login procedure must be accomplished
within 60 seconds with the following authentication:

DEV login: config<CR>

Password: devConfig<CR>

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Note:

 <CR> stands for hitting the "Enter" or "" key on the keyboard.
 All characters/commands to be entered are case sensitive.
 If the serial interface is not assigned to any CPH protocol it is not required to

press <Ctrl>-T during the boot process. I.e. it is always possible to enter the

configuration program without any time limits or restrictions regarding the

number of login attempts.

 Otherwise (i.e. if a CPH protocol is assigned), if nothing is entered at the

DEV login: prompt, or after the third unsuccessful attempt to login, the CPH

takes over the serial interface which is announced by:

CPH starts now!

After successful authentication, the configuration program is launched. After start
and after the finalization of most of the choices the program lists the choices that
can be performed:

config

======

1 set IP address (192.168.0.225)

2 set netmask (255.255.0.0)

3 set gateway (192.168.0.99)

q quit without saving

x save configuration and exit

your choice >

Choices can be executed by typing the character in the first column of each line
followed by a <CR>. The second column of each line provides a short description of
the choice and the third column displays in parentheses the current setting of the
corresponding choice. In the example above, the IP address and the netmask are
different from the factory network settings (chapter 4.3.3).

When using the "q" choice the configuration program terminates. If a CPH protocol
is assigned, the CPH takes over the serial interface, which is announced by:

CPH starts now!

When using the "x" choice the configuration program saves all changes made and
resets the device (i.e. rebooting the device):

your choice > x<CR>

rebooting the device, please wait...

After a device reset it takes a few moments before the serial interface is accessible
again as described at the beginning of this chapter.
In the following, the available choices are explained:

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4.4.2.2.2 1 set IP address

This choice is used to change the IP address of the device:

(...)

your choice > 1<CR>

Current IP address is 192.168.0.225

Enter IP address ('NONE' to clear) >

To change the current IP address type in a different valid address; to clear the
address type in "NONE<CR>"; and just entering <CR> maintains the current setting:

Enter IP address ('NONE' to clear) ><CR>

unchanged

4.4.2.2.3 2 set netmask

This choice is used to change the netmask of the device:

(...)

your choice > 2<CR>

Current netmask is 255.255.0.0

Enter netmask ('NONE' to clear) >

To change the current netmask type in a different valid entry; to clear it type in
"NONE<CR>"; and just entering <CR> maintains the current setting.

4.4.2.2.4 3 set gateway

This choice is used to change the gateway address of the device:

(...)

your choice > 3<CR>

Current gateway is 192.168.0.99

Enter gateway ('NONE' to clear) >

To change the current gateway address type in a different valid address; to clear
the address type in "NONE<CR>"; and just entering <CR> maintains the current setting.

4.5 Maintenance of the Product

The product is maintenance-free.
Cleaning of the surface of the chassis should be done carefully with a dry lint-free
cloth.

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5 Operation of the Product

After going through the installation steps as described above, the device is ready to
use. There are different options for monitoring and control, please refer to chapter

3.1.2. Before the operation via each of these possibilities is explained, the different
device operation modes are described:

5.1 Modes of Operation

Local Mode, Remote Mode, and Auto Mode define the manner how the device is
controlled. In addition, Individual switching mode and Simultaneous switching
mode define the switching behavior of the device.
The operation mode can be changed via the mode (or "Local") push button at the
device panel (please refer to chapter 3.1.1), via Web Interface (chapter 5.5.2), via
SNMP (chapter 5.9.4.3.1), and via Sandar Prosan protocol (restricted to the change
between Remote Mode and Auto Mode and vice versa (chapter 5.6.3.6)).

Note:

 The factory setting for the operation mode is Remote Mode.

Changing the switching mode (chapter 5.1.4) is possible only if the DEV 1951 is
equipped with two switch modules.
In Local Mode the switching mode can be altered via the switching mode push
button at the device panel (labeled 6 in the figure of chapter 3.1.1) or via Web
Interface (chapter 5.5.4.1). In Remote Mode, the switching mode can be changed
via Sandar Prosan protocol (chapter 5.6.3.7) and via SNMP (chapter 5.9.4.3.3).

5.1.1 Local Mode

In Local Mode the device executes commands which are issued via push button
actions at the device panel or (also in parallel) via Web Interface.
The digital interface is disabled in Local Mode as well as the functionality of the
different remote protocols (SNMP, Sandar Prosan, Leitch, and QEC) to issue
switching commands and to modify the settings of the device. However, the
communication to the remote interfaces either is enabled or is capable to be
enabled (keyword "Echo in Local Mode", please refer to chapters 5.6.1 & 5.7.1) for
status queries.
No autonomous switching is performed in Local Mode if the DEV 1951 is equipped
with sensing switch modules (and/or digital signal switch modules). Neither Time
Based Switching nor TRAC initiated switching is performed in Local Mode, as well.

Note:

 For products with the preceding version of the device panel providing a "Local"

push button (instead of the mode push button) and a single "Remote" LED

(instead of the three operation mode LEDs), only: The "Remote" LED at the

device panel being off indicates that the device is in Local Mode.

5.1.2 Remote Mode

The Remote Mode is implemented for operation via the digital interface, via SNMP,
via Sandar Prosan protocol, via Leitch protocol, or via QEC protocol.
In Remote Mode, the status of the DEV 1951 is indicated via the LEDs at the device
panel and via Web Interface, but the buttons at the device panel are locked and the
control functionality of the Web Interface is disabled.

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No autonomous switching is performed in Remote Mode if the DEV 1951 is
equipped with sensing switch modules (and/or digital signal switch modules).
Neither Time Based Switching nor TRAC initiated switching is performed in
Remote Mode, as well.

Note:

 For products with the preceding version of the device panel providing a "Local"

push button (instead of the mode push button) and a single "Remote" LED

(instead of the three operation mode LEDs), only:

The "Remote" LED at the device panel is on in Remote Mode, but it cannot be

distinguished whether the device is in Remote Mode or in Auto Mode.

5.1.3 Auto Mode

The Auto Mode is used for Time Based Switching (please refer to chapter 5.5.7.3.3),
or for the optional TRAC functionality (chapter 5.5.7.3.4), or for autonomous
switching if the DEV 1951 is equipped with sensing switch modules (and/or digital
signal switch modules).
As in Remote Mode, the status of the DEV 1951 is indicated via the LEDs at the
device panel and via Web Interface, but the buttons at the device panel are locked
and the control functionality of the Web Interface is disabled.
The digital interface is disabled in Auto Mode as well as the functionality of the
different remote protocols (SNMP, Sandar Prosan, Leitch, and QEC) to issue
switching commands and to modify the settings of the device. However, is possible
to issue status queries and to perform some changes on the operation behavior of
the device, e.g. via the Sandar Prosan PMxy commands (chapters 5.6.3.6…5.6.3.9).

Note:

 For products with the preceding version of the device panel providing a "Local"

push button (instead of the mode push button) and a single "Remote" LED

(instead of the three operation mode LEDs), only:

The "Remote" LED at the device panel is on in Auto Mode, but it cannot be

distinguished whether the device is in Auto Mode or in Remote Mode.
Which of the functionalities is activated in Auto Mode can be selected via Web

Interface (chapter 5.5.7.3.2):

 the Time Based Switching functionality (chapter 5.5.7.3.3); or
 the optional TRAC functionality (chapter 5.5.7.3.4); or
 the autonomous switching functionality if the DEV 1951 is equipped with one

or two sensing switch modules (and/or digital signal switch modules):

5.1.3.1 Autonomous Switching Functionality

The primary input port "In A" and the secondary input port "In B" of the sensing
switch module(s) (digital signal switch module(s)) are continuously monitored
regarding the present RF level (regarding the present digital signal quality,
respectively) if
a. the "Auto Mode Assignment" is set to "Autonomous Switching"

(please refer to chapter 5.5.7.3.2), and if
b. the sensing switch module(s) (digital signal switch module(s))

is (are) switched to the primary input port, and if
c. Auto Mode is activated.

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E.g. in Individual switching mode the device switches a sensing switch module
(digital signal switch module) to the secondary input port if

 on the primary input port, the RF level falls below the defined RF threshold

level (the digital signal quality becomes "Fail", respectively) and if

 on the corresponding secondary input port, the RF level is above the

RF threshold level (the digital signal quality is "OK", respectively).
If neither Option 22 (main backup swap) nor Option 28 (automatic switch back) is
installed, there will be no automatic switching back to the primary input port.
In this case, the switching is to be done explicitly in Local Mode or in Remote Mode.

If Option 22 (main backup swap) is installed, the autonomous switching works in
both directions in the same manner as the switching from the primary to the
secondary input port (as described above).
This means that the device remains switched to the secondary input port unless on
the secondary input port the RF level falls below the RF threshold level (the digital
signal quality becomes "Fail", respectively) and if on the corresponding primary
input port the RF level is above the RF threshold level (the digital signal quality is
"OK", respectively).

If Option 28 (automatic switch back) is installed and activated (as described in
chapter 5.5.7.3.2), the switching back from the secondary to the primary input port
is initiated by the RF level rising above the RF threshold level again (the digital
signal quality becoming "OK" again, respectively) on the failing primary input port.
This switching back is supported by an offset which is an adjustable hysteresis
(0 dB, 1 dB, 3 dB, or 5 dB) for sensing switch modules, or which is an adjustable
delay (0…10 seconds) for digital signal switch modules.

For the autonomous switching capability has to be considered in addition, whether
Individual switching mode or Simultaneous switching mode is activated
(chapter 5.1.4) and whether (and which) input ports are disabled (chapters 5.5.4.1
& 5.9.4.3.9.2), since this has an influence on the switching behavior. Therefore, the
following scenarios are to be examined for the autonomous switching functionality:

 Switching from the primary input port to the secondary input port in

Individual switching mode:

- If both input ports of a sensing switch module (or of a digital signal switch
module) are enabled, the switching is performed as described above.
I.e. the device switches only if on the primary input port the RF level falls
below the RF threshold level (the digital signal quality becomes "Fail", re­spectively) and if on the corresponding secondary input port the RF level is
above the RF threshold level (the digital signal quality is "OK", respectively).

- If the primary input port of a sensing switch module (digital signal switch
module) is disabled, the RF level information (the digital signal quality infor­mation, respectively) of the port is ignored as a trigger; i.e. the device does
not switch to the secondary input port.

- If the secondary input port of a sensing switch module (digital signal switch
module) is disabled, the RF level check (the digital signal quality check, re­spectively) of this port is omitted. Thus, if the sensing switch module (digi­tal signal switch module) is switched to the (enabled) primary input port
and if on the primary input port the RF level drops below the RF threshold
level (the digital signal quality becomes "Fail", respectively), the device un-

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 Switching from the primary input port to the secondary input port in

Simultaneous switching mode
(with two sensing switch modules (digital signal switch modules) installed):

- If all input ports are enabled, the autonomous switching is performed for

- If one of the primary input ports is disabled, this port is not considered in

- Disabling one or both secondary input ports encourages the switching in

 With Option 22:

Switching back from the secondary input port to the primary input port in
Individual switching mode:

- If both input ports of a sensing switch module (digital signal switch module)

- If the primary input port of a sensing switch module (digital signal switch

- If the secondary input port of a sensing switch module (digital signal switch

 With Option 22:

Switching back from the secondary input ports to the primary input ports in
Simultaneous switching mode
(with two sensing switch modules (digital signal switch modules) installed):

- If all input ports are enabled, autonomous switching is performed for both

conditionally switches this sensing switch module (digital signal switch
module) to the secondary input port.

both channels from the primary input ports to the secondary input ports.
The condition is that if on the primary input port of one or of both channels
the RF level drops below the RF threshold level (the digital signal quality be­comes "Fail", respectively) and if on both secondary input ports the RF level
is above the RF threshold level (the digital signal quality is "OK",
respectively).

the switching decision, i.e. the device switches if on the enabled primary
input port the RF level drops below the RF threshold level (the digital signal
quality becomes "Fail", respectively).
There is no autonomous switching if both primary input ports are disabled.

this situation, since the signal information of the secondary input port(s) is
ignored.

are enabled, the switching is performed as described above.
I.e. the device switches only, if on the secondary input port the RF level falls
below the RF threshold level (the digital signal quality becomes "Fail", re­spectively) and if on the corresponding primary input port the RF level is
above the RF threshold level (the digital signal quality is "OK").

module) is disabled, the RF level check (the digital signal quality check,
respectively) of this port is omitted. Thus, if the sensing switch module
(digital signal switch module) is switched to the (enabled) secondary input
port and if on the secondary input port the RF level drops below the
RF threshold level (the digital signal quality becomes "Fail", respectively),
the device unconditionally switches to the primary input port.

module) is disabled, the RF level information (the digital signal quality infor­mation, respectively) of the port is ignored as a trigger, i.e. the device does
not switch autonomously to the primary input port.

channels from the secondary input port to the primary input port.
The condition is that if on the secondary input port of one or of both chan­nels the RF level drops below the RF threshold level (the digital signal qual-

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- If one (or both) primary input port(s) is (are) disabled, the RF level infor-

- If one secondary input port is disabled, this port is not considered in the

 With (activated) Option 28:

Switching back from the secondary input port to the primary input port in
Individual switching mode:

- If both input ports of a sensing switch module (digital signal switch module)

- If the primary input port of a sensing switch module (digital signal switch

- The secondary input port is not considered in the switching decision in this

 With (activated) Option 28:

Switching back from the secondary input ports to the primary input ports in
Simultaneous switching mode
(with two sensing switch modules (digital signal switch modules) installed):

- If all input ports are enabled, autonomous switching is performed for both

- If one (or both) primary input port(s) is (are) disabled, the RF level infor-

- The secondary input port(s) is (are) not considered in the switching decision

ity becomes "Fail", respectively) and if on both primary input ports the
RF level is above the RF threshold level (the digital signal quality is "OK" on
both primary input ports, respectively).

mation (the digital signal quality information, respectively) of the port(s) is
omitted. Thus, disabling one (or both) primary input port(s) encourages the
switching in this situation, since the signal information of the primary input
port(s) is ignored.

switching decision, i.e. the device switches if on the enabled secondary in­put port the RF level drops below the RF threshold level (the digital signal
quality becomes "Fail", respectively).
There is no autonomous switching if both secondary input ports are
disabled.

are enabled, the switching is performed as described above.
I.e. the device switches, if on the primary input port the RF level is above
the RF threshold level again (the digital signal quality is "OK" again,
respectively) plus an offset value (chapter 5.5.7.3.2).

module) is disabled, the RF level check (and the digital signal quality check,
respectively) of this port is omitted. Thus, the device unconditionally
switches to the primary input port.

scenario. Therefore, it does not matter whether the secondary input port is
disabled or enabled.

channels from the secondary input ports to the primary input ports.
The condition is that on both primary input ports the RF level is above the
RF threshold level again (and the digital signal quality is "OK" again,
respectively) plus the offset value (chapter 5.5.7.3.2).

mation (the digital signal quality information, respectively) of the port(s) is
omitted. Thus, disabling one (or both) primary input port(s) encourages the
switching in this situation, since the signal information of this (these)
primary input port(s) is ignored.

in this scenario; i.e. it does not matter whether the secondary input port(s)
is (are) disabled or enabled.

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5.1.4 Individual/Simultaneous Switching Mode

Regarding the signal routing both channels of a DEV 1951 equipped with two switch
modules are independent from each other, but the device provides two switching
modes: Individual switching mode and Simultaneous switching mode.
In Individual switching mode, both switch modules can be operated independently
from each other. In Simultaneous switching mode, both switch modules are
switched synchronously to the same input port (i.e. either to input port "In A" or to
input port "In B").
The selection between Individual switching mode and Simultaneous switching
mode can be performed via the switching mode push button at the device panel
(labeled 6 in the figure of chapter 3.1.1) or via Web Interface (chapter 5.5.4.1) in
Local Mode, and via Sandar Prosan protocol (chapter 5.6.3.7) or via SNMP
(chapter 5.9.4.3.3) in Remote Mode.

Note:

 If the first and the second switch module are in different positions, it is not

possible to activate the Simultaneous switching mode. In this case, the channel
LEDs of both channels at the device panel will toggle twice when operating in
Local Mode the switching mode push button. To overcome this situation the
same switching position has to be established by switching one of the channels
(in Individual switching mode) before activating the Simultaneous switching
mode, e.g. via operating the switching mode push button at the device panel.

 Naturally, the Simultaneous switching mode is not available if the device is

equipped with a single switch module, only.

5.2 Initialization of the Device

The device performs a health check and a configuration check during power-up and
after a device reset. This takes about 60 seconds; there is no manual configuration
necessary, all settings (including the operation mode) after power-up or after a
device reset remain unchanged.

Note:

 If not a single switch (or distribution amplifier) module is installed, the device

signalizes this by a permanent event indication (please refer to chapters 3.1.1 &

6.1.2).

5.3 Operation via the Device Panel

The local operation (via push buttons) and the status indication (via LEDs) of the
device panel were already explained in chapter 3.1.1.

Note:

 The factory default for the operation mode is Remote Mode.

To operate the push buttons at the device panel, the DEV 1951 has to be
switched to Local Mode via the mode push button (or the "Local" push button)
at the device panel (please refer to chapter 3.1.1), via Web Interface (chapter

5.5.2), or via SNMP (chapter 5.9.4.3.1).

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1951

PIN 9

PIN 8

PIN 7

1951

1951

1951

Individual: C hannel 1, Port "In A"

Simultaneous: both channels, Port "In A"

PIN 9

PIN 8

PIN 7

PIN 3

PIN 2

PIN 1

PIN 3

PIN 2

PIN 1

Individual: C hannel 1, Port "In B"
Simultaneous: both channels, Port "In B"

Individual: C hannel 2, Port "In A"

Simultaneous: (not functional)

Individual: C hannel 2, Port "In B"
Simultaneous: (not functional)

5.4 Control via the Digital Interface

The digital interface of the DEV 1951 provides basic remote switching functionality,
e.g. for the control via a PLC (Programmable Logic Control).
The connector for the digital interface (SubD-9 (f), labeled "DIG/In") is located at the
rear side of the chassis, please refer to chapter 7 for the pin assignment.

Note:

 Since the digital interface is defined as a remote interface, it only works if the

device is in Remote Mode.

 If the device is equipped with a single switch module, only the contacts for

Channel 1 are monitored for operation.

 If the device is equipped with two switch modules and if the switching mode is

set to Simultaneous switching mode (chapter 5.1.4), only the contacts for
Channel 1 are monitored for operation.

 The switching commands via the digital interface will override switching

commands issued via SNMP or via any CPH protocol (Sandar Prosan, Leitch, or
QEC), i.e. the digital interface has a higher priority.

The following figure shows how the switch module setting works when using the
digital interface:

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Channel

Port

Pin

Common Pin

1

"In A" 9 8 1 "In B" 7 8 2 "In A" 3 2 2 "In B" 1 2

Pin-Pin

Status

Pin-Pin

Status

Action

9-8

closed

7-8

closed

no action

closed

open

Individual: Channel 1 → "In A"
Simultaneous: both channels → "In A"

open

closed

Individual: Channel 1 → "In B"
Simultaneous: both channels → "In B"

open

open

no action

3-2

closed

1-2

closed

no action

closed

open

Individual: Channel 2 → "In A"
Simultaneous: (not functional)

open

closed

Individual: Channel 2 → "In B"
Simultaneous: (not functional)

open

open

no action

Note:

 The switching principle is that the pin of the channel/port to be switched is set

to the same electrical potential as the common pin.
Both common pins of the digital interface of the DEV 1951 (pin 8 and pin 2) are
on ground potential (GND). It is intended that the switching is performed via
(dry) relay contacts, but also open collector switching is possible if the voltage
of the open collector circuit does not exceed +12 V DC; TTL-level (+5 V DC) is
recommended. The following tables inform about the pin assignment on the
digital interface connector and about the behavior of the digital interface:

 When switching the device to Remote Mode it is not guaranteed, that the

device is in the switching position(s) as given by the potentials of the contacts
of the digital interface.
Since switching via the digital interface is slope triggered, it is recommended to
generate a switching event after the activation of Remote Mode for any
channel in order to synchronize the device with the switching position(s) as
given by the potentials of the contacts of the digital interface. This event is
independent from the device being equipped with one or two switch modules
and the switching mode being Individual or Simultaneous.

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5.5 Operation via Web Interface

The Web Interface is a comfortable user interface for operating the product, i.e. the
device is controlled via a computer and a Web Browser as the communication
application. Several users (assumed the appropriate number of licenses) can access
the device at a time. Eight licenses are included in the delivery and it is possible to
purchase additional license keys at any time, please contact DEV Systemtechnik.

Note:

 Most of the screenshots shown in the following were made from the Web

Interface of a DEV 1951 equipped with two sensing switch modules and with
applied Option 28 (automatic switch back) and with applied Option 37 (TRAC).
Other configurations may deviate from the layout but not from the basic
functionality of the Web Interface.

5.5.1 Start of the Web Interface

To start the Web Interface open a web browser (recommended is Mozilla Firefox
(version 3.5 or higher), also Chrome, Opera, Safari, or Internet Explorer (starting
with version 8, recommended is version 9 or higher) are supported) and type in the
URL (IP address) of the device:

http://<IP-of-the-device>/

After a moment, the Start Screen of the Web Interface appears:

To log on the first time use the factory default account:

Username: ADMIN
Password: ADMIN

After entering username and password, click on .

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Note:

 Both, username and password are case sensitive.
 Note the header in the Start Screen:

The labels "SystemName" and "SystemLocation" are the SNMP variables
'System Name' and 'System Location'; both can be set within the SNMP setup
(please refer to chapter 5.5.7.2.2).

 If the Start Screen is unavailable, make sure that the computer accessing the

device is in the same subnet of the common network (chapter 4.4.2.1).

 If the network connection to the device gets lost during a session, an appropri-

ate notification will pop up. After confirmation, the web browser is redirected
to the Start Screen. If the device is accessible again, a new authentication is
required.

 During power-up or after a reset the device displays a different screen:

DEV 1951

SystemName

SystemLocation

If the device is operational (again), the screen usually automatically changes to
the Start Screen, thus enables the input fields to be edited; if not, please use
the refresh functionality of your web browser (e.g. the function key F5).

 The Web Interface permits the definition of a number of users for accessing the

Web Interface in parallel (in accordance to the number of installed licenses). An
additional user who tries to log in receives a corresponding notification
informing about the logged in user(s), e.g.:

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 It is recommended to add users AND to change the password of the factory de-

fault account. How this is to be done is subject of chapters 5.5.7.1.2 & 5.5.7.1.1.

 The language of the screenshots shown here is English, as a second language

currently German is available (chapter 5.5.7.1.1).

5.5.2 The Main Window and Common Features of the Main Tabs

After successful authentication the main window of the Web Interface shows up
with the Status Tab opened, which is the default view:

In the top of the window on the left side, the five (or six) tabs are located ("Status",
"Control", "Events", "Recording" (only for a DEV 1951 with installed sensing switch
module(s), please refer to chapter 5.5.6), "Setup", and "Info"). The active tab is
highlighted; clicking on an inactive tab opens the corresponding tab instead.
In the middle on the top of the window three buttons are located indicating that
the device is in Remote Mode (as shown in the screenshot above), or in Local Mode
(as shown in the screenshot of chapter 5.5.3), or in Auto Mode.
Changing the operation mode of the device via Web Interface is performed by

clicking on the desired button, e.g. clicking in the situation above on the but­ton, highlights the button instead of the button. In the representa-

tion of the device panel in the upper part of the Status Tab, the indicators change
correspondingly (here from "Remote" to "Local").
Right to these buttons the currently logged in user (here: "ADMIN") and the permis­sion of the user (here: "admin") are shown. Please refer to chapter 5.5.7.1.2 for
more information on this subject.
Then, the date and time of the device are displayed right to this information. The
correct date and time depend on the proper configuration of an NTP timeserver
and of the timezone (chapter 5.5.7.2.1). Note that if there was no timeserver de­tected at power-up, the device sets the date and time to "01-Jan-2000 00:00".

In the right corner close to the company logo, the button is located.
Clicking on this button returns the Web Interface to the Start Screen.

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Note:

 It is recommended to finish a Web Interface session by clicking on the

button. This instantaneously releases the allocated license and enables other
users to log in.

 A timeout feature (20 seconds) is implemented within the Web Interface, i.e. a

session is automatically terminated (and the allocated license is released) if a
user who is currently logged in closes the web browser.

 This means that a Web Interface session is kept open unless the button

is operated or if the web browser (in other words, the connection to the de­vice) is closed.

 It is possible to start a Web Interface session on another computer using the

same user account; naturally, this automatically terminates the session on the
preceding computer.

5.5.3 Status Tab

The upper part of the Status Tab shows a simplified representation of the front and
of the rear side of the device. Thus, a quick overview is provided regarding the de­tected module configuration, regarding the operating status, regarding the switch­ing status, and regarding the health status of the device. The round indicators are
equivalent to the physical LEDs at the device panel (green = ok/activated input,
red = failure, yellow = Remote/Local/Auto/Simultaneous/Individual, or gray = /off),
please refer to chapter 3.1.1 for details on the indicator information.

In the lower part of the Status Tab, the Active Events Window is located. This win­dow shows pending and not acknowledged events via the related event
descriptions with a date/time stamp. event shown in the following screenshot was
triggered for demonstration purpose. To obtain more details on the events open
the Events Tab (chapter 5.5.5).

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Note:

 Here, the symbolic representation of the DEV 1951 shows the two applied

modules DEV 11-0010. Other product configurations are presented in a similar
manner. Note that passive modules like the available passive splitter modules
are not shown in the Web Interface, since these modules do not contribute to
additional surveillance information.

 The module specific panel in the Control Tab (please refer to chapter 5.5.4 and

sub-chapters) can be accessed directly from the Status Tab by clicking on the
module representation.

5.5.4 Control Tab

The main purpose of the Control Tab is the switching of the device. Additionally, it
provides means for changing module specific settings.
On the left side, the structuring entry "Switches" contains one or two entries in order
to select a specific module of the device.
The name of each entry ("Switch X") is the descriptive designator, which can be edited
by double-clicking the specific item:

Note that on the right side in a switch (!) panel the port names (here "In 1 A", "In 1 B",
and "Out 1") can be edited in the same manner.

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Note:

 If changes of settings (which are to be saved explicitly) are applied in a panel of

the Control Tab (or within an entry of the Setup Tab, please refer to chapter

5.5.7), they are highlighted in yellow. If a different panel within the Control Tab

(or a different entry within the Setup Tab) is selected without saving the
change(s) in the current panel or entry, a corresponding warning message pops
up. The following figure shows this situation for selecting the "Switch 2" panel af­ter "Surveillance Enable" check box of "In 1 B" in the "Switch 1" panel:

 The number of entries within the structuring entry "Switches" corresponds to the

number of detected switch modules.
If a distribution amplifier module is installed, it can be selected in the same
manner on the left side of the Control Tab within the appearing structuring
entry "Distribution Amplifier" (as shown in the screenshot of chapter 5.5.4.2).

 Switching and the change of settings within the Control Tab of the Web Inter-

face can be performed by operators with "read/write" or "admin" permission
only, and if the device is in Local Mode.

If a module functionality within a functionality item is selected on the left side of
the Control Tab, the corresponding panel appears on the right side. The different
panels are explained in the following. Note that in the lower right corner of each

panel two buttons are provided for selecting and
switching mode.

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5.5.4.1 Switch

If a switch is selected on the left side of the Control Tab, the corresponding switch
panel appears on the right side. It consists of two or three sections:

1) In the upper section below the descriptive designator (here: "Switch 1"), first the
"Input Port Numbers" and the "Output Port Number" of the switch module are shown as a
reference to the index of the SNMP .portTable (please refer to chapter 5.9.4.3.9)
and if port specific events are to be identified in the Events Tab (chapter 5.5.5).
Then the "Module Type" (here: "DEV 11-0010") and the "Group Assignment" -here always
"Group 1" since the group assignment of the DEV 1951 cannot be changed- are
listed. Additionally -with Option 28 (chapter 5.5.7.3.2) installed and acti­vated- the line "Automatic Switch Back at" indicates the switch back level; here with
"-27.0 dBm" an offset (i.e. 3 dB) to the (standard -30 dBm) RF threshold level
setting is displayed.

2) Within the second section, the switching status of the switch module is shown
and can be changed.
Depending on the active switching mode, either the individual switching of the
current switch module can be performed, or the simultaneous switching of the
two switch modules. The switching mode is indicated at the lower right of any

switch panel by one of the buttons or being activated
(i.e. or ).

The screenshot above shows in the middle the measured RF level of each input
port on the left side. The green background implies that the RF level is above
the individual threshold, it is red otherwise.
The background color of a port rectangle appears in gray if the port is disabled
(e.g. by deactivating the corresponding "Surveillance Enable" check box), or if it does
not provide any status information.

The individual switching of a switch module is performed as follows:
To switch in Local Mode (!) only the selected module, Individual switching

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mode is to be activated; i.e. in this scenario, the button in the lower
right corner is to be operated:

Next, click on the circle between the representation of inputs and output,
which causes two additional buttons to appear:

After a click on the button, the actual switching is performed and the
new status (the module is switched to the primary input) is shown:

Please notice that the button becomes disabled (grayed out:

), indicating that the device cannot be switched back to Simulta­neous switching mode, since the two installed switch modules are not in the
same switching position now.

Note:

• If the device is equipped with two switch modules, if Local Mode is

activated, and if both switch modules are in the same switching position,
the button can be operated (independently which switch is

selected on the left side of the Control Tab) to activate the Simultaneous
switching mode. If activated, both switch modules will now switch
synchronously if the switching of any module is performed as described
above.

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• The input ports of many switch modules appear as gray rectangles. Only

• If the device is in Remote Mode or in Auto Mode, the and the

3) For sensing switch modules and for digital signal switch modules a third section
appears below the switching section permitting the modification of module
specific parameters. Note that after settings have been altered within this

section in Local Mode (!), a click on the button is necessary to
apply the changes:

• For both input ports of a sensing switch module, the "RF Threshold" can be

• The "Surveillance Enable" check boxes are used to enable (default) or to disable

Note:

 Older sensing switch modules are still working in the DEV 1951 with the current

firmware version but with the following restrictions: First, the RF threshold
level for each input port cannot be adjusted via Web Interface or via SNMP, but
through a potentiometer with a threshold level scale on the sensing switch
module. Thus, the line "RF Threshold" is not displayed for these modules in the
third section. Second, these modules are not capable to deliver the measured
RF level value, only an assessment "OK" (with green background) or "Fail" (with
red background) is shown. Naturally, these modules are not capable to support
Option 22 (main backup swap) and Option 28 (automatic switch back).

enabled (!) input ports of sensing switch modules (or of digital signal switch
modules) which are capable of judging the (digital) signal quality are
displayed as rectangles with a green or a red background.

switching mode buttons are disabled (grayed out).

adjusted individually within a certain range.

events possibly caused by the input ports of sensing switch modules and of
digital signal switch modules.

5.5.4.2 Distribution Amplifier

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This type of panel (within the appearing structuring entry "Distribution Amplifier") is
available only for devices with installed distribution amplifier module(s) for ASI/SDI
signals, i.e. this screenshot was taken from a DEV 1951 in a different configuration.
The panel consists of two sections:

1) In the upper section below the descriptive designator (here: "Amp 2"), first the
"Port Number" of the module is shown as a reference to the index of the SNMP

.portTable (please refer to chapter 5.9.4.3.9) and if port specific events are to be

identified in the Events Tab (chapter 5.5.5). Then the "Module Type" is listed (here:
"DEV 14-0091"). Finally, the "Signal Status" is an assessment regarding the detected
signal quality that can be either "Fail" (red) or "OK" (green).

2) In the "Setup" section, the "Surveillance Enable" check box is used to enable (default)
or to disable events possibly caused by the related port. Note that after this

setting was altered in Local Mode (!), a click on the button is
required to apply the change.

5.5.5 Events Tab

The Events Tab displays a table of the events that were detected by the device.
The different events are listed line-by-line, i.e. each event carries a Date/Time

stamp (in the format: "DDD DD MMM YYYY hh:mm:ss", here: "Wed 11 Oct 2017 15:45:04")
informing about the last occurrence of that event. The second column is a Counter
reporting the number of occurrences of that event (here: "1"). The third column
denotes whether that event is Ack.nowledged ("X") or not (" ") (here: " ", i.e. <space>,
meaning not acknowledged). The fourth column shows whether that event is
Pend.ing ("X") or not (" ") (here: "X", i.e. pending). The fifth and the sixth columns
inform about the error code No. in Hexadecimal (here: "1302") and in Decimal (here:
"4866") notation; the last column reports the related Event Description (here:
"Power Supply 2"), please refer to chapter 6.2.

Below, the buttons and are located:

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An event can be acknowledged by highlighting (i.e. clicking on) the related line and
by operating the button afterwards. The intention of the

acknowledgement of an event is to provide means to mask out a pending event of
the Active Events Window in the Status Tab (chapter 5.5.3) and to stop the event
indication (chapters 3.1.1 & 6.1.2) if all pending events in the table are
acknowledged. If a confirmed event occurs again, the counter in the table is
increased and the acknowledgement is reset (i.e. the "X" disappears, the Active
Events Window reports the event again, and the event indication becomes active).
An acknowledged and not pending event can be deleted from the list by high-

lighting the corresponding line, followed by clicking on .
If a deleted event occurs again, a line added at the beginning of the table.

Note:

 It is possible to acknowledge (and to delete) more than one entry at a time by

highlighting more entries using the <Ctrl> or the <Shift> key of the keyboard in
combination with mouse click(s).

 Users with "read" permission only have no rights to acknowledge or to delete

event entries (chapter 5.5.7.1.2).

 If an event is still pending or not acknowledged, it cannot be deleted.
 The table content can be stored using the data backup functionality

(chapter 5.5.7.4.2).

5.5.6 Recording Tab

The Recording Tab is available only if the DEV 1951 is equipped with sensing switch
module(s). For this type of modules, the RF level data is continuously captured in
discrete intervals. The Recording Tab permits the visualization and the external
storage of this data.
After opening the Recording Tab for the first time in a Web Interface session, two
empty diagrams labeled "Overview" and "Details" are shown as in the next
screenshot.

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In this application, the drop down list "Signal Type" permits the selection of
"RF Level" only.
After selecting one to three "Signals" via the three drop down lists, the recorded
data shows up in both diagrams:

Note:

 The recording interval and thus the recording duration can be altered, please

refer to chapter 5.5.7.3.1. The data representation initially always comprises
the recorded data for the selected items, i.e. it is stretched if the full recording
duration is not reached yet, and the graphs indicate via gaps if the device was
turned off for a span of time.

 The checkbox labeled "Show Thresholds" enables the display of the related

present threshold for the selected signals. If checked, each threshold is shown
as a separate horizontal line with an individual label.

It is possible to magnify the data by drawing a zoom window in either (!) diagram,
i.e. by clicking and holding the left mouse button while pulling the mouse over the
interesting area:

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Directly after releasing the left mouse button, the zoomed area appears in the
"Details" diagram while the "Overview" diagram is highlighting the zoomed area:

Three buttons are located at the bottom of the Recording Tab:
If the recorded data of the selected items was zoomed as described above, the but-

ton resets the data representation to the initial state, i.e. all recorded
data for the selected signals is displayed in both diagrams.
The remaining two buttons provide the option to store the captured data externally

(without the possibly displayed thresholds). stores the recorded data
of the currently selected signals and the button stores all recorded data

of the device, i.e. the available data of all signals. After operating one of the but­tons, a browser specific window pops up and suggests the storage of the data as
"recording.csv" and as "recording_all.csv", respectively. The csv (comma-separated values)
file format permits the data import e.g. into a MS Excel worksheet:
The csv-file is a text file modeling a table. Each line is interpreted as row containing
column information, here with the columns delimited by a semicolon (";") charac­ter as the column separator.

The number of columns in the file depends on the export method ( vs.

). If the button is selected, the number of columns depends
on the number of signals currently presented. In any case, each signal consists of a
"Time" and of a "Value" column; the number of lines depends on the recording
duration (over 17000 lines e.g. within two days with the default ten seconds
recording interval).
The first line of the csv-file is the header line providing the column information. The
first entry is assigned to the first channel (e.g. "In 2 A", indicating the (default) port
name of the primary input port of the second sensing switch module, please refer
to chapter 5.5.4), concatenated with the "Signal Type" (i.e. here always "RF Level")
and with "Time". After the semicolon, the same entry is listed with "Values" instead
of "Time". This sequence is repeated for all columns that are part of the csv-file.

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In 2 A RF Level Time

In 2 A RF Level Values

In 2 B RF Level Time

In 2 B RF Level Values

09-Oct-2017, 15:53:32

-21.9

09-Oct-2017, 13:53:32

-23.6

09-Oct-2017, 15:53:42

-22.0

09-Oct-2017, 15:53:42

-23.6

09-Oct-2017, 15:53:52

-22.2

09-Oct-2017, 15:53:52

-23.9

09-Oct-2017, 15:54:02

-22.3

09-Oct-2017, 15:54:02

-23.9

09-Oct-2017, 15:54:12

-21.9

09-Oct-2017, 15:54:12

-23.7

09-Oct-2017, 15:54:22

-22.1

09-Oct-2017, 15:54:22

-23.9

09-Oct-2017, 15:54:32

-22.3

09-Oct-2017, 15:54:32

-23.9

09-Oct-2017, 15:54:42

-22.1

09-Oct-2017, 15:54:42

-23.7

09-Oct-2017, 15:54:52

-22.1

09-Oct-2017, 15:54:52

-23.9

09-Oct-2017, 15:55:02

-22.1

09-Oct-2017, 15:55:02

-23.8

The actual data starts in the second line of the csv-file. Note that the time infor­mation is stated in standard MS Excel format, i.e. the integral part of the number
defines the date (starting from 1 being the 01-Jan-1900, e.g. 43017 denotes the
date 09-Oct-2017) and the fractional part defines the time within the date
(1/(24 * 60 * 60) = 00:00:01, e.g. .66 = 15:50:24).
In the following only the first few lines of a csv-file are listed which was created by

exporting the data shown in this chapter via the button ("⌡" and "⌠"
are symbolizing that the two consecutive lines are actually one line in the file):

In 2 A RF Level Time;In 2 A RF Level Values;⌡
⌠In 2 B RF Level Time;In 2 B RF Level Values;

43017.662175925925926;-21.9;43017.578842592592593;-23.6;

43017.662291666666667;-22.0;43017.662291666666667;-23.6;

43017.662407407407407;-22.2;43017.662407407407407;-23.9;

43017.662523148148148;-22.3;43017.662523148148148;-23.9;

43017.662638888888889;-21.9;43017.662638888888889;-23.7;

43017.662754629629630;-22.1;43017.662754629629630;-23.9;

43017.662870370370370;-22.3;43017.662870370370370;-23.9;

43017.662986111111111;-22.1;43017.662986111111111;-23.7;

43017.663101851851852;-22.1;43017.663101851851852;-23.9;

43017.663217592592593;-22.1;43017.663217592592593;-23.8;

After import and formatting the "Time" columns to the format
"DD-MMM-YYYY, hh:mm:ss" this results in the following table:

Note:

 The decimal separator in the csv-file is the point character ("."), this has to be

considered during the data import of the csv-file e.g. into an Excel worksheet.

 For the data import into an empty MS Excel worksheet, select the tab "Data"

and there the icon "From Text". Then locate the csv-file and follow the instruc­tions of the text import wizard.

 The correct time information is dependent on the proper configuration of a

timeserver and of the timezone. The settings can be applied via the network
setup of the Setup Tab (chapter 5.5.7.2.1).
If no timeserver is configured for the device, the recording of the data starts at
01-Jan-2000, 00:00:00; after a device reset the time is reset to 01-Jan-2000,
00:00:00 as well, but the recording of the data is continued with the time of the
last sample.
If a timeserver was configured for the device that is not available anymore after
a reset, the recording of the data is continued with the time of the last sample
as well. Otherwise, if the timeserver is available after a device reset, the
recording of the data is continued with the correct time; i.e. this causes a time
gap within the data.

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5.5.7 Setup Tab

On the left side, the Setup Tab contains the menu items structuring the different
entries described in the following. Initially the single entries are not displayed:

To demonstrate the available setup entries, all menu items above were folded out
in the following screenshot:

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5.5.7.1 User Setup

The menu item User Setup on the left side of the Setup Tab provides access to the
Password and Language entry for all users and access to the User Management
entry for users with "admin" permission.

5.5.7.1.1 Password and Language

The input fields of the Password and Language entry enable the user who is cur­rently logged in to change the password and to alter the personal language setting.
To change the password, enter the old password, the new password, and the con­firmation of the new password.
To change the language, select an entry from the drop down list "Language".

A click on the button applies the changes made. If the password has
been changed, a window pops up for confirmation.

Note:

 English and German are the languages supported by the current firmware.

5.5.7.1.2 User Management

The currently logged in user has to have "admin" permission to access the User
Management entry where users can be added or deleted and the permission can
be modified.
In the next screenshot, a user named TEST with "admin" permission is in the pro-

cess to be restricted to "read/write" permission. After a click on the
button, this user will then have all rights but only access to the Password and Lan­guage entry within the Setup Tab. A user with "read" permission additionally is not
able to apply any changes within the other tabs of the Web Interface.

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To add a new user click on "Add New User" and enter a name in the appearing text
field and click again. By default this new user has "read" permission and no
password is set for this user.

By activating an existing user, the permission category can be altered and a pass­word can be set for this user. A click on the button applies the

changes made. If the password has been changed, a confirmation window pops up.
To delete a user, click on the (trash bin) icon right to the user entry, a window
pops up for confirmation.

Note:

 As already mentioned, user names and passwords are case sensitive.
 Do not forget to click on the button to store the settings made

before selecting (or adding) another user.

 A user logs on without any password if this user was added without an assigned

password. The following message pops up during the login process:

 It is not possible to delete the ADMIN user but it is recommended to change

the default password.

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5.5.7.2 System Setup

The menu item System Setup on the left side of the Setup Tab provides access to
the Network entry, to the SNMP entry, and to the CPH entry for users with "admin"
permission.

5.5.7.2.1 Network

For the network setup of the device, at least the fields "IP Address" and "Netmask"
have to contain valid entries.
"Gateway", "Nameserver 1", and "Nameserver 2" are to be specified by their IP ad­dresses, the "Nameserver" entries are used for the resolution of the "Timeserver"
fields, only.
The "Timeserver" fields are used to specify one or two timeservers either via full­qualified domain name or via IP address.
To specify the timezone select an entry from the drop down list "Timezone":

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A click on the button applies the changes made.
If the IP address has been changed, a confirmation window pops up informing
about the redirection of the browser to the new address, e.g.:

Note:

 The LED symbols right to the fields for the gateway, for the nameservers, and

for the timeservers indicate whether the saved (!) entry is an available network
resource (green) or not (red).

5.5.7.2.2 SNMP

With the SNMP setup, the settings for "System Name" and "System Location" can
be modified. A "System Administrator" can be defined and the passwords for the
"Read Community" and for the "Write Community" can be set. The check box
below these entries is used to enable the switching between Local Mode, Remote
Mode, and Auto Mode via SNMP, please refer to chapter 5.9.4.3.1.
Additionally, up to four Trap Destination IP Addresses can be defined via the IP ad­dress and the port in the format <ip-address>{:<port>}, e.g. 192.168.0.148:121. If <port> is not
specified, the standard SNMP trap port 162 is assumed. The LED symbols right to
the IP addresses fields indicate (after the entries have been saved) whether the ad­dresses are available network resources (green) or not (red). The community for
each of the four entries can be altered from the default "public" as well.
The check boxes below the header "Enabled Traps" provide access to the SNMP
.trapEnableMask (chapter 5.9.4.4.1) via Web Interface.
Finally, a click on the icon initiates the download of the MIB of the device.

A click on the button applies the changes made.

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Note:

 The strings "System Name" and "System Location" are part of standard SNMP

functionality and are limited to 40 characters, each. The number of visible
characters in the text fields is limited by the field size.

 As mentioned, the strings "System Name" and "System Location" are also

displayed in the Start Screen of the Web Interface (chapter 5.5.1).

5.5.7.2.3 CPH

To change the protocol assignment within the CPH setup, select the desired proto­col from the drop down list "CPH Protocol": If "none/configuration program" is
selected, the CPH is disabled and the serial interface is used for the configuration
program (please refer to chapter 4.4.2.2) with the settings described in chapter

4.4.1.1. Selecting any other entry changes the assignment to the selected protocol
(Prosan, Leitch, or QEC):
If "Prosan" is selected, the check box "Echo in Local Mode" appears in addition to
the drop down list "CPH Protocol". Chapter 5.6.1 explains the impact when
enabling/disabling "Echo in Local Mode".

If "Leitch" is selected, the "Echo in Local Mode" and "Individual Switch Level Assign­ment" check boxes are appearing in addition to the drop down list "CPH Protocol".
Chapter 5.7.1 explains the impact when enabling/disabling "Echo in Local Mode"
and "Individual Switch Level Assignment".

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If "QEC" is selected, the drop down list "QEC serial address" appears in addition to
the drop down list "CPH Protocol". The device address for the serial communication
via QEC protocol (chapter 5.8) can be modified in the range 0x00…0xFF.

A click on the button applies the changes made and restarts
the device. This is indicated via a confirmation window, e.g.:

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Recording Interval

Resulting Recording Duration

10 Seconds

2 Days

30 Seconds

6 Days

60 Seconds

12 Days

5.5.7.3 Feature Setup

The Feature Setup menu item on the left side of the Setup Tab provides access for
users with "admin" permission to the device specific setup entries, i.e. to the
Recording entry, to the Auto Mode entry, to the Time Based Switching entry, and
to the optional TRAC submenu plus the Actions submenu.

5.5.7.3.1 Recording

This entry is available only if the product is equipped with sensing switch modules.
The Recording entry permits the configuration of the interval for the signal
recording functionality; please refer to chapter 5.5.6.

Via the "Recording Interval" drop down list the interval for the regular data capture
can be selected. After an entry was picked, the "Resulting Recording Duration" is
displayed in the line below. The following choices are available:

Note:

 After clicking on the button with a different recording interval

selected than the currently applied setting all stored recording data is deleted
instantaneously; the recording starts with the new recording interval setting.

 The default recording interval setting is 10 seconds; after a Restore Factory

Defaults (chapter 5.5.7.4.1), this setting is applied as well.

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5.5.7.3.2 Auto Mode

The Auto Mode entry is required for selecting the functionality that the device is
supposed to perform if Auto Mode is activated.
Additionally and only if Option 28 is installed, the "Automatic Switch Back" section
appears in which the automatic switch back functionality (please refer to chapters

3.1.3 & 5.1.3) can be activated and configured.

The drop down list "Auto Mode Assignment" provides up to three entries:

1) Autonomous Switching

Only if the device is equipped with sensing switch modules and/or with digital
signal switch modules this entry is available and can be selected.
If "Autonomous Switching" is activated, the autonomous switching functionali­ty of the device based on the RF level information (and on the digital signal
quality, respectively) is enabled in Auto Mode.

2) Time Based Switching

The Time Based Switching functionality (chapter 5.5.7.3.3) is enabled in Auto
Mode if this entry is activated.

3) TRAC

This entry is available and can be selected only if the device is equipped with
the TRAC option. The TRAC functionality (chapter 5.5.7.3.4) is enabled in Auto
Mode if "TRAC" is activated.

If Option 28 is installed, the automatic switch back functionality can be activated
and configured in the section "Automatic Switch Back". With this functionality acti­vated -and the Auto Mode Assignment set to "Autonomous Switching"-, the auto­nomous switching functionality can be extended in a way that the device in Auto
Mode can switch single (if Individual switching mode is active) or both (if Simulta­neous switching mode is active) signal paths back to the primary input port(s).
The check box labeled "Enable Automatic Switch Back" is used for the activation/
deactivation of the automatic switch back functionality.

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If an installed sensing switch module is switched to the secondary input port and if
on the primary input port the RF level rises above the corresponding RF threshold
level plus an offset value, the device switches back to the primary input port. This
offset value (0 dB, 1 dB, 3 dB, or 5 dB) can be selected via the drop down list
labeled "Hysteresis for Automatic Switch Back":

If an installed digital signal switch module is switched to the secondary input port
and if on the primary input port the signal quality becomes "OK" again for a
selected time, the device switches back to the primary input port. This time (0…10
seconds) can be selected via the drop down list labeled "Switch Back Time for
Automatic Switch Back (ASI/SD-SDI/HD-SDI/3G-SDI)":

A click on the button applies the changes made.
Note:

 If Option 22 is installed, the main backup swap functionality is activated perma-

nently if the Auto Mode Assignment set to "Autonomous Switching". No ex­plicit adjustments need to be performed.

 By default the Auto Mode Assignment set to "Autonomous Switching" (if appli-

cable) and –if Option 28 is installed- the automatic switch back functionality is
activated; is set to "0" dB for sensing switch modules and is set to "10" seconds
for digital signal switch modules; these settings are applied as well after a
Restore Factory Defaults (chapter 5.5.7.4.1).

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5.5.7.3.3 Time Based Switching

Time Based Switching is a functionality to enable the time controlled switching of
the device. The following prerequisites are to be considered:

 Time Based Switching is to be configured via the Web Interface, only.
 The device needs to obtain the present time from a timeserver, i.e. the net-

work setup of the device may have to be supplemented with the entry for a
valid timeserver, and the local timezone may have to be adjusted, please refer
to chapter 5.5.7.2.1.
Again, the present device time is displayed in the top of the window left to the

button. Note that if there was no timeserver detected at power-up, the

device sets the date and time to "01-Jan-2000 00:00".

For setting up Time Based Switching within the Web Interface, activate Local Mode
(in order to suppress unwanted Switching Actions during the setup).

 As the first step select "Time Based Switching" in the drop down list

"Auto Mode Assignment" of the Auto Mode entry (chapter 5.5.7.3.2) and save
the change.

 Next, within the Switching Actions entry (chapter 5.5.7.3.5.1) at least one

Switching Action needs to be defined.

 After that, at least one trigger of the Time Based Switching entry (see below)

needs to be defined and to be enabled.

 For arming the device for Time Based Switching, activate the Auto Mode.

After selecting the entry Time Based Switching on the left side of the Setup Tab,
click on "Add new trigger"…

…and enter a name in the appearing text field (here: "Wednesday 16:10").
Next, select the name to enable the definition of the trigger (alternatively and if
applicable, click on an existing trigger in the list to modify it):

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Either a time trigger is defined:

 repetitive for one or more weekdays by checking the corresponding box(es)

(here, We(dnesday) was chosen), or it is defined as a

 single occurrence using the drop down lists below "Day" and "Month" for

defining the date.
Note that when checking one or more weekdays, the drop down lists for "Day" and
for "Month" become grayed out and vice versa when selecting a "Day" and/or a
"Month", the weekday check boxes become grayed out. In this case –i.e. to re­enable the weekday check boxes- choose the first entry (the blank entry above the
entry "01") in both drop down lists for "Day" and "Month".
After specifying the weekday(s) or the date select the time for the switching event
via the drop down lists for "Hour" (here: "16"), "Minute" (here: "10"), and "Second"
(here: "00", thus unchanged).
Then select the "Switching Action" via the drop down list. Here an action is shown
and selected as the default that was defined already via the Switching Actions setup
entry (chapter 5.5.7.3.5.1).
As the last step in defining a time trigger either activate the trigger by checking the
box right to the "Enabled" label, or leave it unchecked if it is intended to set up the
trigger in advance:

Finally, click on the button to store the settings made before
selecting (or adding) another trigger and/or before activating the Time Based

Switching by clicking on the button.

Note:

 The check box labeled "Enabled" is grayed out and the message "Not enabled in

Auto Mode Assignment" appears if "Time Based Switching" is not activated in

the "Auto Mode Assignment" of the Auto Mode entry (chapter 5.5.7.3.2).

 If the connection to the timeserver is not established, this is displayed in the

Time Based Switching functionality via the message: "Warning: The device currently does

not receive a valid time from an NTP server, so time based switching may not work properly. Please check the

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time server configuration". Time Based Switching can be activated in such a case as

well, but this may cause unwanted switching of the device.

 Neither the activated time triggers nor the activated Switching Actions are

checked for ambiguity or contradictions. The behavior of the device is not

predictable in such a case.

 It is recommended to perform Time Based Switching with the device set to

Individual switching mode (chapter 5.5.4.1) and rather to use appropriate

configured Switching Actions to avoid unwanted switching behavior.

 To copy a trigger click on the (copy entry) icon left to the (trash bin)

icon of the trigger entry. The copy that is appearing has the same name but

with a leading "Copy of" (which can be renamed by double clicking the name).

 To delete a trigger click on the (trash bin) icon right to the trigger entry.

A window pops up for confirmation.

 Finally, do not forget to click on the button to activate the Time Based

Switching functionality:

5.5.7.3.4 TRAC

The TRAC submenu is available in the menu item Feature Setup of the Setup Tab
only if the device is equipped with Option 37.
TRAC (stands for "Trap Receiver Action Controller") is a powerful feature enabling
the device to execute Switching Actions (please refer to chapter 5.5.7.3.5.1) based
on received SNMP traps or on IP monitoring.
The following prerequisites are to be considered:

 TRAC is to be configured via the Web Interface, only.
 If Switching Actions based on received SNMP traps (trap triggers) are pursued,

the DEV 1951 must be configured as trap destination within the device that is

sending the traps.

For example, if the device is a DEV 1953, activate the SNMP setup (chapter

5.5.7.2.2) there and enter the IP address of the DEV 1951 in one of the four

Trap Destination IP Address fields. No changes on the port setting (162) or on

the community are required if the TRAC Setup (chapter 5.5.7.3.4.1, description

of the upper section) of the DEV 1951 was not changed. Then, one or more

traps should be enabled within the SNMP setup of the DEV 1953 before saving

the changes.

Note that traps received by the device (in the example: the DEV 1951) can be

monitored via the Trap Log (chapter 5.5.7.3.4.3).

 If Switching Actions based on IP Monitoring are pursued, the target device

causing Switching Actions has to support and must be reachable via ICMP Echo

Requests (better known as "ping").

 Select "TRAC" in the drop down list "Auto Mode Assignment" of the Auto Mode

entry (chapter 5.5.7.3.2) and save the change.

 It is recommended to activate Individual switching mode (e.g. via the Control

Tab in Local Mode, chapter 5.5.4.1) and to define the necessary Switching

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Actions (chapter 5.5.7.3.5.1) before the definition of trap triggers or of

IP Monitoring triggers and before switching the device to Auto Mode.
The definition of trap triggers is explained within the description of the TRAC Setup
entry (chapter 5.5.7.3.4.1); here the usage of the Trap Log (chapter 5.5.7.3.4.3) as
definition support for trap triggers is explained as well. The definition of
IP Monitoring triggers is subject of chapter 5.5.7.3.4.2.

5.5.7.3.4.1 TRAC Setup

In the upper section, the TRAC Setup entry is used for the trap receiver settings and
for the definition of trap triggers in the lower section.
The TRAC Setup section comprises the fields "Trap Receiver Community" and "Trap
Receiver Port". By default, the "Trap Receiver Community" contains no entry, thus
not any restriction in the reception of traps. When entering e.g. "public" the recep­tion of traps is restricted to traps of the "public" community, only. The standard
SNMP trap port 162 is the default "Trap Receiver Port". This value can be changed if

required. It is recommended to click on the button to store the
settings made before continuing with the definition of trap triggers.
To define a trap trigger the entries in the section "Trap Trigger" can be defined
manually but an assisted procedure is recommended and described next.
As the first step, activate the Trap Log entry on the left of the Setup Tab:

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The traps received by the device are listed here (for details, please refer to chapter

5.5.7.3.4.3). Select a trap by clicking on the corresponding line in the upper table.
After activation, the details of the selected trap are listed in the lower table named
"Variable Bindings":

After the verification, that the highlighted trap contains the desired information it
can be transferred to the section "Trap Trigger" of the TRAC Setup entry by clicking

on :

The click on the button automatically activates the
TRAC Setup entry comprising a new entry in the Trap Trigger section named
"Added from Trap Log" and the settings for "Source IP", "Enterprise OID",
"Trap Specific", and the "Variable Bindings" as obtained from the Trap Log:

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As the next step, it is recommended to alter the name of the trap trigger to avoid
confusion when importing another trap entry in the same manner. This is done in
the usual way by double-clicking the entry:

After the renaming at least the "Switching Action" is to be selected via the related
drop down list (again, the appropriate Switching Actions (chapter 5.5.7.3.5.1)
should have been defined already) and the trap trigger needs to be enabled via the
"Enabled" check box.
If required, changes to the "Variable Bindings Matching Rules" table can be applied
in addition:

 Existing lines in the table can be deleted by clicking on the on the right side.

Additional lines can be added using the on the right side after the last line.

 Each line listed can be edited in the three columns "OID", "Op." (stands for "Op-

erator"), and "Value". For "OID" and "Value" manual entries are required, the

wildcard character ("*") can be used in the "OID" column and substitutes a

single OID specifier item. For the "Op." entry, a drop down list is provided as

shown in the next screenshot. The provided operators are self-explanatory;

"RE" stands for "Regular Expression", i.e. the "Value" is expected to be in Perl

syntax, please refer for instance to http://perldoc.perl.org/perlre.html

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As the last step, click on the button to store the settings made. All
enabled triggers (trap triggers and IP monitoring triggers) are activated by clicking

on the button.

Note:

 If either entry "Source IP", or "Enterprise OID", or "Trap Specific" is left blank

means the acceptance of any corresponding incoming data.

 Again, the wildcard character "*" (as a placeholder for any character) can be

used in the "Variable Bindings Matching Rules" table within the OID only, e.g.:

.1.3.6.1.4.1.21035.41.*.1.0 instead of .1.3.6.1.4.1.21035.41.2.1.0.

 The check box labeled "Enabled" is grayed out and the message "Not enabled in

Auto Mode Assignment" appears if "TRAC" is not activated in the drop down

list "Auto Mode Assignment" of the Auto Mode entry (chapter 5.5.7.3.2).

 Neither the activated trap triggers nor the activated Switching Actions are

checked for ambiguity or contradictions. The behavior of the device is not

predictable in such a case.

 To copy a trap trigger, click on the (copy entry) icon left to the (trash

bin) icon of the trigger entry. The copy that is appearing has the same name but

with a leading "Copy of" (which can be renamed by double clicking the name).

 To delete a trigger click on the (trash bin) icon right to the trigger entry.

A window pops up for confirmation.

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5.5.7.3.4.2 IP Monitor

The IP Monitoring entry can be used for the definition of triggers in order to switch
the DEV 1951 based on the availability or on the absence of a target device, e.g. a
video router. Again, the target device has to support and must be reachable via
ICMP Echo Requests ("ping").

The definition of a trigger within the IP Monitoring entry is done in the same
manner as for time triggers (please refer to chapter 5.5.7.3.3) or for trap triggers
(chapter 5.5.7.3.4.1).

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After clicking on "Add new trigger" a sensible name for the trigger is to be entered
(here: "1993 unreachable"). Then after selecting the new entry on the left side, the
definition of the trigger is performed on the right side.
Here, the "Destination IP" (the IP address of the target device) needs to be entered.
The "Interval" defines the time between the attempts to ping the target device; the
default value is 1 second. The "Number of attempts" (default: 2) is used to decide
after how many intervals the "Condition" is fulfilled. The "Condition" can be defined
via the drop down list, either "IP unreachable" or "IP reachable".
Then the "Switching Action" is to be selected via the corresponding drop down list
(again, the appropriate Switching Actions (chapter 5.5.7.3.5.1) should have been
defined already) and the trigger needs to be enabled via the "Enabled" check box.

As the last step, click on the button to store the settings made. All
enabled triggers (IP monitoring triggers and trap triggers) are activated by clicking

on the button.

Note:

 The check box labeled "Enabled" is grayed out and the message "Not enabled in

Auto Mode Assignment" appears if "TRAC" is not activated in the drop down

list "Auto Mode Assignment" of the Auto Mode entry (chapter 5.5.7.3.2).

 The activated Switching Actions are not checked for ambiguity or contradic-

tions. The behavior of the device is not predictable in such a case.

 To copy a trigger, click on the (copy entry) icon left to the (trash bin)

icon of the trigger entry. The copy that is appearing has the same name but

with a leading "Copy of" (which can be renamed by double clicking the name).

 To delete a trigger click on the (trash bin) icon right to the trigger entry.

A window pops up for confirmation.

5.5.7.3.4.3 Trap Log

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This screenshot of the Trap Log was already shown in the description how a trap
trigger can be defined; please refer to chapter 5.5.7.3.4.1. The "Trap Log" table
covers one entry per trap received by the device.
Each line comprises a "Date/Time" stamp, the "Source IP", the "Enterprise OID",
and the "Trap Specific" entries.
After selecting (i.e. clicking on) a specific line the "Variable Bindings" table shows
the specific information of the selected trap, i.e. one (or more) OID(s) with its
(their) value(s).

Note:

 The Trap Log remains empty if this device is not configured properly as trap

destination within the device that sends traps (chapter 5.5.7.3.4).

In addition, the TRAC Setup (chapter 5.5.7.3.4.1, description of the upper sec-

tion) needs to be configured accordingly.

 On the other hand, too many traps received by the device may cause the loss

of clarity within the Trap Log. It is to be considered whether the number of

traps can be reduced by changing communication parameters on both ends of

the transmission chain.

 The number of entries within the Trap Log is limited to 30; the oldest entries

are deleted first.

5.5.7.3.5 Actions

The Actions submenu item within the menu item Feature Setup of the Setup Tab
comprises the Switching Actions entry and the Action Log entry.

5.5.7.3.5.1 Switching Actions

The definition of Switching Actions is necessary for the Time Based Switching func­tionality and for the TRAC functionality. By setting up a Switching Action it can be
defined which switch module is affected and to which port the switch module is to
be commanded.

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After selecting the Switching Actions entry on the left side of the Setup Tab in the
submenu "Actions", click on "Add new action" and enter a name in the appearing
text field. When defining Switching Actions it is recommended to enter a meaning­ful short name (here: existing "to 1-B 2-A" and new "to 1-A 2-B"). This enables a
better distinction when selecting the appropriate Switching Action in the setup of
the Time Based Switching functionality or in the setup of the TRAC functionality
later.

Then select the name in the list to enable the definition of the Switching Action
(alternatively and if applicable, click on an existing action to modify it).
The Switching Action is defined by selecting the module outputs (via the check
boxes below the "On" label) and then the input port (via the drop down list below
the "Input" label) to be switched. Depending on the application, one or more
Switching Actions need to be defined.

Note:

 Do not forget to click on the button to store the settings made

before selecting (or adding) another Switching Action or before proceeding e.g.

with the Time Based Switching setup (chapter 5.5.7.3.3) or with setting up the

TRAC functionality (chapter 5.5.7.3.4).

 If the device is equipped with a single switch module, naturally only this

module is available for Switching Action definitions.

 Again, it is recommended to perform Time Based Switching (and TRAC as well)

with the device set to Individual switching mode. If it is intended to switch both

switch modules synchronously, rather the definition of a Switching Action is

recommended which defines the desired target switch positions for the single

switch modules.

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 To copy a Switching Action click on the (copy entry) icon left to the

(trash bin) icon of the action entry. The copy that is appearing has the same

name but with a leading "Copy of" (that naturally can be renamed).

 To delete a Switching Action click on the (trash bin) icon right to the action

entry. A window pops up for confirmation. Note that a Switching Action cannot

be deleted if it is used in a trigger definition; a corresponding message pops up

when trying to delete the Switching Action:

5.5.7.3.5.2 Action Log

The Action Log captures the Switching Actions performed by the device in Auto
Mode. Per entry, it comprises a "Date/Time" stamp, the "Trigger Type" and the
"Trigger Name" causing the action, and the "Action Type" and the "Action Name" of
the performed action.
The screenshot above shows three entries, one for each trigger type that can cause
a Switching Action:

 IP Monitor

the Switching Action "to 1-B 2-A" was caused by the IP monitor trigger named

"1993 unreachable" (please refer to chapter 5.5.7.3.4.2).

 Trap

the Switching Action "to 1-A 2-B" was caused by the trap trigger named

"1911 in Auto" (chapter 5.5.7.3.4.1).

 Time

the Switching Action "to 1-B 2-A"was caused by a trigger of the Time Based

Switching named "Wednesday 16:10" (chapter 5.5.7.3.3).

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5.5.7.4 Software Service

The Software Service menu item on the left side of the Setup Tab provides access
for users with "admin" permission to the Restore Factory Defaults entry, to the
Data Backup entry, and to the Firmware Update entry.

5.5.7.4.1 Restore Factory Defaults

With a click on the button, the settings of the device are reset
to the factory values as described in chapter 4.3 including all changes on the Web
Interface. To maintain the network setup of the device, activate the check box

"Keep IP Settings" before operating the button. After a click on

, a device reset is initiated indicated via a pop up window, e.g.:

Note:

 Any data stored via the data backup functionality is not deleted, please refer to

chapter 5.5.7.4.2.

 Recorded data (chapter 5.5.6) is deleted only if a different recording interval is

applied than the recording interval default setting (chapter 5.5.7.3.1).

5.5.7.4.2 Data Backup

The data backup functionality provides means to manage various device data.
It is recommended to perform external backups of the device configuration data
("Module Data" and "Device Data", see below) periodically.
The data backup functionality shows up with a table providing ten lines ("slots")
and with five buttons below the table which are grayed out initially.

The first action is to activate one of the ten slots by clicking on it, which causes the
corresponding line to be highlighted. Additionally, depending on the content of the

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selected slot, two to all of the five buttons become active, thus enabling the data
backup functionality:

After operating the button the drop down list "Type", the text field
"Description", and a button labeled appear:

With the drop down list, the type of data to be saved can be chosen:

 "Module Data"

to store the following data categories for all (!) installed modules:

● "Switch Settings",

● "RF Threshold Settings" (if applicable), and

● "Channel Settings and Names".

Please refer to chapters 5.5.4.1…5.5.4.2 for details on these settings and to the

"Restore" section below for retrieving all or only a part of these settings.

 "Device Data"

to store device specific settings accessible via the Setup Tab:

● "IP Settings" (chapter 5.5.7.2.1),

● "Time Based Switching / TRAC"

(chapters 5.5.7.3.3, 5.5.7.3.4.1, 5.5.7.3.4.2, 5.5.7.3.5.1),

● "User Setup" (chapter 5.5.7.1), and

● "General Setup (SNMP, Device Setup, …)"

(chapters 5.5.7.2.2, 5.5.7.3.1, 5.5.7.3.2, including the modes (chapter 5.1)).

Please refer to the chapters in parentheses for details on these settings and to

the "Restore" section below for retrieving all or only a part of these settings.

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 "Error Log"

to store the current content of the Events Tab (chapter 5.5.5).

Note that "Error Log" data can neither be restored nor be imported.
For better identification, it is recommended to enter a descriptive name for the

backup set in the "Description" text field before operating the button.
In the following screenshot, the first three slots are occupied with a backup set for

each type of data. These backup sets were created in the way as described above.

As indicated, the content of the selected slot determines which of the five buttons
is active or not. In the screenshot above the button is grayed out since it
is not possible to restore the content of an "Error Log" backup set. The

button is active only if either a slot with a backup set containing "Module Data" or
"Device Data" is selected.

Note:

 A backup set can only be restored to a device with the same product number.

Otherwise the message "Error: Backup created with different device" appears

instead of the button.
If a backup set containing "Module Data" is selected as shown in the next screen-

shot and if the button is operated, the available categories (as described
above) are listed. It is possible to (de-)select particular categories via the adjacent

check boxes before operating the button.

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If a backup set containing "Device Data" is selected as shown in the next screenshot
and if the button is operated, the available data categories (as described

above) are listed. It is possible to (de-)select particular categories via the adjacent
check boxes before operating the button.

After operating the button, the appearing "File" text field permits the
insertion of a filename including the path where the file resides. Alternatively, the

button can be used to locate the file. After the file was selected, a click on

the button activates the file transfer to the device.

Note:

 Precondition for the import is a valid backup set containing "Module Data" or

"Device Data", which was generated before via the button (see

below), or which was provided by DEV Systemtechnik.

 It is always possible to import a valid backup set containing "Module Data" or

"Device Data" to a selected slot. The information, which is possibly stored in

that slot, is overwritten without any confirmation.

 If the imported backup set is to be applied to the device, the button

is to be operated after the import.

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After operating the button a browser specific window pops up and sug­gests the storage of the data as "backup_slot_xx" (with "xx" being the number of the
slot (i.e. the line number 01…10 of the table) to be exported). If a backup set
contains "Module Data" or "Device Data", this data is stored in an encoded binary
format. The export of an "Error Log" backup set is stored in text format similar to
the appearance in the Events Tab (chapter 5.5.5).

With the button, the content of the selected slot is deleted without any
confirmation.

5.5.7.4.3 Firmware Update

The Firmware Update entry provides means to update the device firmware,
manuals etc., and/or to reset the device via Web Interface.

Precondition for updating the device firmware is a service package provided by
DEV Systemtechnik.
The input field permits the insertion of a filename including the path where the file

resides. Alternatively, the button can be used to locate the file. After the
selection of the file, a click on the button activates the file transfer to the

device. As soon as the upload is finished, the installation is started, please observe
the text output, which appears in the "Update Status:" text window.

If –for any reason– a device reset is required, the button can be used
to reset the device without updating the firmware.

After a click on the button, a device reset is initiated indicated via a
pop up window, e.g.:

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5.5.8 Info Tab

The Info Tab provides information regarding configuration and setup of the device.
This information is mainly intended for support purposes; part of this information
may be requested when contacting DEV Systemtechnik.

In the left column, first the "Hardware Configuration" is described:

 Device, here: DEV 1951
 MAC Address, here: 00-D0-93-3F-5A-54

The second section in the left column describes the "Software Options"; this device
is equipped with Option 28 (automatic switch back) and with Option 37 (TRAC).

In the right column on the top, the "Software Configuration" is described:

 Device Firmware version, here: 32-0071 G.01
 Linux Kernel version, here: 3.14.73-S
 SNMP Software version, here: 3.1.13
 the current IP Address of the device, here: 192.168.0.11
 Web Interface Licenses, here: 8
 SNMP Licenses, here: 1

The (download) icon located on the bottom of the right column is for
downloading the electronic version of the user manual.
Finally, in the right column in the middle the manufacturer's name, country and
hyperlink are listed.

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5.6 Control via Remote Interface: Sandar Prosan Protocol

5.6.1 Sandar Prosan Protocol Overview

Messages between the device and the host are transferred as records, i.e. data
between unique start and stop characters. Once a complete record is received, the
receiver returns the character <ACK> if the record is correctly received and recog­nized. If the record is incorrectly received, not recognized, or not available, the
receiver returns a <NAK> character. If the transmitter receives <NAK> (or no answer
e.g. within two seconds), it retransmits the message. The number of retransmis­sions and delays before a retransmission varies and depends on the current system.
Each record comprises a checksum that is inserted -as two characters in hexa­decimal notation- between the last data character and the stop character of the
record. The checksum is calculated by the modulo 256 sum of all data characters in
the record.
The record start character <STX>, the record stop character <ETX>, the acknowledge
character <ACK>, and the not-acknowledge character <NAK> cannot be transmitted as
data characters.

Note:

 The Sandar Prosan protocol is available only if "Prosan" is selected within the

CPH setup of the Web Interface; please refer to chapter 5.5.7.2.3. The protocol

is exclusively available via the serial interface; the settings of the serial inter-

face have to be configured accordingly (chapter 4.4.1.2).

 If "Echo in Local Mode" is disabled (factory default), the device responds in

Local Mode with an <ACK> character to the commands Q, XR, AM, AMA, S, or SA,

only. If enabled, the responses are equivalent to the responses in

Remote Mode.

"Echo in Local Mode" can be disabled or enabled within the CPH setup of the

Web Interface or via the device specific PMEy commands (chapter 5.6.3.8).

 The device specific PMxy commands (chapters 5.6.3.6…5.6.3.9) are not part of

the protocol standard and can be executed in Remote Mode or in Auto Mode.

 For testing purposes, the Sandar Prosan tool WinProTest v1.01 by Telecast

Norge AS may be used to issue Sandar Prosan commands.

5.6.2 Sandar Prosan Protocol Communication Structure

The basic command structure is:
Command:

<STX><command><checksum><ETX>

Notation:

<STX> = record start character (= 0x02)
<ETX> = record stop character (= 0x03)
<ACK> = acknowledge (complete record received) character (= 0x06)

<NAK> = not-acknowledge (incorrect record received) character (= 0x15)

Note:

 (Initially) always a <ACK> or <NAK> character is returned as a response to a

command.

 The switching command (M, chapter 5.6.3.5) can be executed in Remote Mode

only.

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5.6.3 Sandar Prosan Commands

The different commands for the communication with the device are described next.

5.6.3.1 Status Query (Q)

The status query can be sent at any time to the device
<STX>Q<checksum><ETX> i.e. <STX>Q51<ETX>

The device answer is
<ACK><STX>Q<status_byte><checksum><ETX> e.g. <ACK><STX>Q00B1<ETX>

with the following possible content of the <status_byte>:
00 = Status ok in Remote/Auto Mode
01 = Pending event(s) in Remote/Auto Mode
10 = Status ok in Local Mode
11 = Pending event(s) in Local Mode

5.6.3.2 Query Alarm Messages (AM or AMA)

This is the command for the query of pending events
<STX>AM<checksum><ETX> i.e. <STX>AM8E<ETX>

or
<STX>AMA<checksum><ETX> i.e. <STX>AMACF<ETX>

The device answer is
<ACK><STX>AM001:0000,e{,x

or
<ACK><STX>AMA001:0000,e{,x

with:
e = 00…99 number of events following

{,x

,…,xe}

1

= 00…FF if there are events: error code class (first digit) and
error code sub-class (second digit) in hexadecimal (!) notation,
separated by commas (",")

e.g. <ACK><STX>AM001:0000,00A5<ETX> (no events)
or <ACK><STX>AMA001:0000,01,1377<ETX> (power supply event(s))

Note:

 The type of event is indicated via the upper two hexadecimal digits of the

related error class. The first digit specifies the error class according to

chapter 5.9.4.4.2; the second digit defines the sub-class. The event(s) of the

second example are in the error class "1", i.e. this denotes events in the area of

the power supplies, please refer to chapter 6.2.1. The sub-class of the indicated

event (x1 = 13) is "3", specifying a "Power Supply" event.

 It is not indicated if there is more than one pending and not acknowledged

event of the same error code class/sub-class.

,…,xe}<checksum><ETX>

1

,…,xe}<checksum><ETX>

1

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5.6.3.3 System Identification (XR)

This command can be issued in order to obtain device information

<STX>XR<checksum><ETX> i.e. <STX>XRAA<ETX>

The device specific identification data is returned in the format
("⌡" and "⌠" are symbolizing that the two consecutive lines are actually one line)

<ACK><STX>XR:DEV<sp>SYSTEMTECHNIK,<model_number>,<model_type>,⌡
⌠<firmware_revision><checksum><ETX>

E.g. for a DEV 1951 with 2 switch modules and with firmware revision G.01

<ACK><STX>XR:DEV<sp>SYSTEMTECHNIK,DEV1951,2*AB-Switch,G.0155<ETX>

Note:

 <sp> denotes the "space" character.

5.6.3.4 Read Status of Signal Path (S or SA)

This is the command for the query of the switching status of the device

<STX>S<checksum><ETX> i.e. <STX>S53<ETX>

or

<STX>SA<checksum><ETX> i.e. <STX>SA94<ETX>

The device answer is a (sequence of) three digit number(s each) indicating to which
input port the corresponding output port is connected to

<ACK><STX>S:o1{,o2}<checksum><ETX> e.g. <ACK><STX>S:002,002DD<ETX>

or

<ACK><STX>SA:o1{,o2}<checksum><ETX> e.g. <ACK><STX>SA:0015F<ETX>

with:
o1 = the input port number of the first switch module that is either
001: first switch module / primary input port "In A" or
002: first switch module / secondary input port "In B";
{

} = ("{"and "}" indicate that the content only will be reported if two switch

,o2

modules are installed)
the input port number of the second switch module that is
001: second switch module / primary input port "In A" or
002: second switch module / secondary input port "In B"
if command set 1 is active;
OR
003: second switch module / primary input port "In A" or
004: second switch module / secondary input port "In B"
if command set 2 is active;
Note:

 Regarding the distinction between command set 1 and command set 2, please

refer to chapter 5.6.3.5.

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5.6.3.5 Set Signal Path (M)

This is the command for switching the switch module ooo to the input port iii.

<STX>Mooo:iii<checksum><ETX> e.g. <STX>M:001:002AA<ETX>

with:
ooo = the switch module number. ooo is 001 if the first switch module is to be
switched and ooo can be 002 if there are two switch modules installed and
if the second switch module is to be switched;
iii = the input port number to which the switch module is to be connected to,
either 001 or 002 if command set 1 is active,
and ranging from 001 to 004 if command set 2 is active, see below.

The device confirms the command with an <ACK> if the command is accepted and
with a <NAK> otherwise.

Note:

 If a parameter exceeds the permissible range or if the device is not in Remote

Mode, a <NAK> is returned.
For the DEV 1951 there is a distinction between two command sets. This distinction

is made only if there are installed two switch modules.

5.6.3.5.1 Command Set 1

Command set 1 is the standard command set which is activated after power on.
It is always active if there is installed a single switch module, only.
The switching command syntax and the meaning of ooo was described in chapter

5.6.3.5, the meaning of iii in command set 1 is

iii = the input port number either 001 for port "In A" or 002 for port "In B".

5.6.3.5.2 Command Set 2

Command set 2 is applicable only if two switch modules are installed.
Command set 2 is activated by issuing the M command with addressing the input
ports of the second switch module as 003 and 004 (instead of 001 and 002).
The switching command syntax and the meaning of ooo was described in chapter

5.6.3.5, the meaning of iii in command set 2 is
iii = the input port number ranging from 001 to 004:

first switch module / primary input port "In A" = 001
first switch module / secondary input port "In B" = 002
second switch module / primary input port "In A" = 003
second switch module / secondary input port "In B" = 004.

Note:

 The idea of command set 2 is to treat the device as a matrix with four input

ports and with two output ports, but of course the input ports of the first

switch module cannot be routed to the output port of the second switch

module and vice versa.

 Once command set 2 is activated it is valid until a device reset, i.e. there is no

command to switch back to command set 1.

 Naturally, command set 2 affects the responses to a switching status query

(please refer to chapter 5.6.3.4).

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5.6.3.6 Select Remote Control Mode (PMCI/PMCE)

Via these device specific commands, the operation mode can be either set to
Auto Mode (PMCI) or to Remote Mode (PMCE), please refer to chapter 5.1.

<STX>PMCI<checksum><ETX> i.e. <STX>PMCI29<ETX>

and

<STX>PMCE<checksum><ETX> i.e. <STX>PMCE25<ETX>

The device confirms both commands with an <ACK> if the command is accepted and
with a <NAK> if the device is in Local Mode.

Note:

 If the Auto Mode is activated via the PMCI command, this implies the usage of

the device defined by the Auto Mode Assignment of the Web Interface

(chapter 5.5.7.3.2).

 If Auto Mode is activated, no switching command (M, chapter 5.6.3.5) is

executed. The PMCE command has to be issued first, to get back the remote

switching control via Sandar Prosan protocol.

5.6.3.7 Select Switching Operation Mode (PMOI/PMOS)

The switching mode can be set via these device specific commands to
Individual switching mode (PMOI) or to Simultaneous switching mode (PMOS),
please refer to chapter 5.1.4.

<STX>PMOI<checksum><ETX> i.e. <STX>PMOI35<ETX>

and

<STX>PMOS<checksum><ETX> i.e. <STX>PMOS3F<ETX>

The device confirms both commands with an <ACK> if the command is accepted and
with a <NAK> otherwise. The commands are rejected in Local Mode and the PMOS
command is rejected in Remote Mode or Auto Mode if the preconditions for Simul­taneous switching mode are not given. I.e. if there is installed a single switch
module only or if there are installed two switch modules that are in different switch
positions.

Note:

 In Simultaneous switching mode the switching functionality via the M command

depends on the activated command set (chapter 5.6.3.5)

• Command set 1:
M001:001 and M002:001 - switches both switch modules to port "In A"
M001:002 and M002:002 - switches both switch modules to port "In B"

• Command set 2:
M001:001 and M002:003 - switches both switch modules to port "In A"
M001:002 and M002:004 - switches both switch modules to port "In B"

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5.6.3.8 Select Echo in Local Mode (PME0/PME1)

Using these device specific commands "Echo in Local" can be
disabled (PME0) or enabled (PME1).
If "Echo in Local" is disabled and if the device is in Local Mode, the device responds
to queries (Q, XR, AM or AMA, S or SA) with an <ACK> character only.

<STX>PME0<checksum><ETX> i.e. <STX>PME012<ETX>

and

<STX>PME1<checksum><ETX> i.e. <STX>PME113<ETX>

The device confirms both commands with an <ACK> if the command is accepted and
with a <NAK> if the device is in Local Mode.

Note:

 Alternatively, "Echo in Local" can be enabled or disabled within the CPH setup

of the Web Interface (please refer to chapter 5.5.7.2.3).

5.6.3.9 Select Power Supply Monitoring Mode (PMP0/PMP1)

With these device specific commands the power supply monitoring can be
disabled (PMP0) or enabled (PMP1).
If disabled, the reporting of all power supply event via the query command AM (or

AMA) (please refer to chapter 5.6.3.2) including the Q command (chapter 5.6.3.1) is

suppressed.

<STX>PMP0<checksum><ETX> i.e. <STX>PMP01D<ETX>

and

<STX>PMP1<checksum><ETX> i.e. <STX>PMP11E<ETX>

The device confirms both commands with an <ACK> if the command is accepted and
with a <NAK> if the device is in Local Mode.

Note:

 The successful execution of these commands modifies bit 1 of the SNMP

.errorEnableMask (chapter 5.9.4.4.2).

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5.7 Control via Remote Interface: Leitch Protocol

5.7.1 Leitch Protocol Overview

Like the Sandar Prosan protocol, the implementation of the Leitch protocol pro­vides a standard for the communication between the device and a host. The inter­face can be used for the monitoring and for the switching of the device. Within the
Leitch protocol standard it is distinguished between two protocol modes: the Leitch
Terminal Protocol and the Leitch Pass-Through Protocol. DEV Systemtechnik has
implemented a subset of the Leitch Pass-Through Protocol. Only one Leitch
Terminal Protocol command is implemented: "Enable Reporting" is the command
to switch to the Leitch Pass-Through Protocol mode.
The Leitch protocol is implemented to work via TCP/IP on port 23 (standard Telnet
port), and/or via the serial interface.

Note:

 The Leitch protocol is available only if "Leitch" is selected within the CPH setup

of the Web Interface; please refer to chapter 5.5.7.2.3. If it is intended to use

the serial interface to control the device via Leitch protocol, the settings of the

serial interface have to be configured accordingly (chapter 4.4.1.1).

 If "Echo in Local Mode" is disabled (factory default), the device responds in

Local Mode with the Leitch Error Message (see below) to any valid Leitch com-

mand which returns a response in Remote Mode. If enabled, the responses are

equivalent to the responses in Remote Mode. "Echo in Local Mode" can be en-

abled or disabled within the CPH setup of the Web Interface.

 The Leitch protocol implementation on this device distinguishes between "Indi-

vidual Switch Level Assignment" being enabled (factory default) or disabled.

The selection is performed via a check box in the CPH setup of the Web Inter-

face and has impact on the behavior of the "Request Crosspoint Status" com-

mand (chapter 5.7.4.5) and on the behavior of the "Direct Crosspoint Take"

switching command (chapter 5.7.4.6).

Basically the selection alters the perspective on the arrangement of the switch

modules within Leitch levels (<Lvl>) and destinations (<Dest>) in Individual

switching mode if the DEV 1951 is equipped with two switch modules

• If "Individual Switch Level Assignment" is enabled, the first switch module
is addressed via Level 0/Destination 0 and the second switch module
is addressed via Level 1/Destination 0.

• If "Individual Switch Level Assignment" is disabled, the first switch module
is addressed via Level 0/Destination 0 and the second switch module
is addressed via Level 0/Destination 1.

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5.7.2 Leitch Protocol Communication Structure

The basic command structure is:
Command:

@<sp><command><CR>

Notation:

@ = the "AT" sign
<sp> = the "space" character
<CR> = the carriage return or carriage return/line feed character(s)

Other characters used in this context:

? = the question mark character
! = the exclamation mark character
, = the comma character
: = the colon character
/ = the slash character

Note:

 All commands start with a "@", followed by the space character <sp>.

The command input is completed with a carriage return character <CR>.

 Parameter numbers are noted in hexadecimal format ("0"…"9" and "A"…"F")

and the counting is zero based, i.e. starting from "0"; e.g. "1" for addressing the
second input port.

 For corrections during the command input, the backspace key ("←" on the

keyboard) is supported.

 The device sends a new prompt (">") after the execution of a command and

after the possible response of a command to indicate that it is ready for the
next command.

 If the syntax of the command is not correctly entered, if a parameter exceeds

the permissible range, or if there is an attempt to switch in Local Mode,
the device responds with the Leitch Error Message

*** ERROR 2002 *** Illegal, Invalid, or overrange parameter entered
Command entry ignored
>_

 Except to the "Enable Reporting" command (please refer to chapter 5.7.4.1) the

device always returns a response to a command.

 The switching command (X:, chapter 5.7.4.6) can be only executed in

Remote Mode.

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5.7.3 Leitch Telnet Authentication

To use the Leitch protocol via Telnet, open a command window, and enter at the
command prompt (e.g. in MS Windows C:\>)

C:\>telnet<sp><IP-of-the-device><CR>

e.g.

C:\>telnet<sp>192.168.0.11<CR>

The device response is

Welcome to LEITCH Telnet

login: _

An authentication is necessary if connecting via Telnet to the device.
The login name and the password are unchangeable

login: leitch<CR>
password: leitchadmin<CR>

After successful authentication, the device response is

TERMINAL ON
>_

Note:

 An unlimited number of Leitch sessions can be executed in parallel via the

standard Telnet port (23).

 A timeout feature is implemented which terminates a Telnet session when

there was no input activity detected for more than 60 seconds.

 There is no authentication necessary if using the Leitch protocol via the serial

interface.

5.7.4 Leitch Commands

The different commands for the communication with the device are described next.

5.7.4.1 Enable Reporting (?)

This is the first command to be issued after starting a Leitch session.
The "Enable Reporting" command switches to the Leitch Pass-Through Protocol

mode to provide access to all other commands

>@<sp>?<CR>

The device is not responding to this command but shows a new prompt (">").
Note:

 If this command is not issued, the device does not respond at all and shows a

new prompt (">") only.

 After this command was issued, the setting of "Echo in Local Mode" (to be

changed via the CPH setup of the Web Interface, please refer to chapter

5.5.7.2.3) determines in Local Mode, whether the device just returns the

Leitch Error Message (chapter 5.7.2), or whether the device is responding to
valid Leitch commands as described in the following.

5.7.4.2 Alarms Request (Q?)

With this command, the device is queried for pending events

>@<sp>Q?<CR>

The device answer is

Q:<Lvl><Dest>,<Src>/A<##>,N<##>,R<##>
>_

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with:

<Lvl> = the first level number, here always "0";
<Dest> = the first destination number, here always "1";
<Src> = the first source number, here always "1";
A<##> = active events, here either "00" or "80";
N<##> = new events, here always "00";
R<##> = released events, here always "00".

I.e. in case of no events, the device answer is

Q:01,1/A00,N00,R00
>_

Note:

 Currently only a single event bit (code "80") is supported, i.e. if there are

pending and not acknowledged events, the device answers with:

Q:01,1/A80,N00,R00
>_

5.7.4.3 Device Description Request (I?A)

With this command, the device is queried for the model number

>@<sp>I?A<CR>

The device answer is

I!A,<device_id>,<device_type>,<#_of_chars>,<model>
>_

with:
<device_id> = here always "0";
<device_type> = here always "0";
<#_of_chars> = number of characters following, here always "7";
<model> = the model number string here always "DEV1951".

I.e. the device answer is

I!A,0,0,7,DEV1951
>_

5.7.4.4 Device Version Request (I?V)

With this command, the device is queried for the firmware version

>@<sp>I?V<CR>

The device answer is

I!V,<device_id>,<device_type>,<hw_type>,<hw_version>,<sw_type>,<sw_version>
>_

with:
<device_id> = here always "0";
<device_type> = here always "0";
<hw_type> = here always "0";
<hw_version> = here always "00";
<sw_type> = letter ("A"…"Z") of the firmware version in ASCII hex,
e.g. "41", = ASCII 0x41 = "A";
<sw_version> = first and second digit of the firmware version,
e.g. "01", "0" for major release, "1" for minor release.

I.e. for a device with firmware revision G.01

I!V,0,0,0,00,47,01
>_

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5.7.4.5 Request Crosspoint Status (S?{Lvl})

This is the command for querying the switching status of the device or of a level

>@<sp> S?{Lvl}<CR>
The "{""}" are indicating the level information as optional.

For the DEV 1951 three scenarios are to be distinguished:

5.7.4.5.1 One Switch Module Installed

The response to the command requesting the switching status of the device

>@<sp> S?<CR>

or the response to the command requesting the switching status of Level 0

>@<sp> S?0<CR>

initiates the same type of reply

S:00,<Src> e.g. S:00,0
>_

with:

<Src> being either 0 for input port "In A" or 1 for input port "In B".

Note:

 The device replies with the Leitch Error Message (please refer to chapter 5.7.2)

when requesting the switching status of Level 1.

5.7.4.5.2 Two Switch Modules Installed & Individual Switch Level Assignment Disabled

As well as in Individual switching mode as in Simultaneous switching mode, the
response to the command requesting the switching status of the device

>@<sp> S?<CR>

or the response to the command requesting the switching status of Level 0

>@<sp> S?0<CR>

initiates the same type of reply

S:00,<Src0> e.g. S:00,1
S:01,<Src1> S:01,0
>_

with:

<Src0> and <Src1> being either 0 for input port "In A" or 1 for input port "In B".

Note:

 The device replies with the Leitch Error Message (please refer to chapter 5.7.2)

when requesting the switching status of Level 1.

5.7.4.5.3 Two Switch Modules Installed & Individual Switch Level Assignment Enabled

In Individual switching mode the response to the command requesting the
switching status of the device

>@<sp> S?<CR>

initiates the device answer

S:00,<Src0> e.g. S:00,1
S:10,<Src1> S:10,0
>_

with:

<Src0> and <Src1> being either 0 for input port "In A" or 1 for input port "In B".

The response to the command requesting the switching status of Level 0

>@<sp> S?0<CR>

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initiates the device answer

S:00,<Src> e.g. S:00,1
>_

i.e. the response returns the status of the first switch module
with:

<Src> being either 0 for input port "In A" or 1 for input port "In B".

The response to the command requesting the switching status of Level 1

>@<sp> S?1<CR>

initiates the device answer

S:10,<Src> e.g. S:10,0
>_

i.e. the response returns the status of the second switch module
with:

<Src> being either 0 for input port "In A" or 1 for input port "In B".

In Simultaneous switching mode the response to the command requesting the
switching status of the device

>@<sp> S?<CR>

or the response to the command requesting the switching status of Level 0

>@<sp> S?0<CR>

initiates the same type of reply

S:00,<Src0> e.g. S:00,1
S:01,<Src1> S:01,0
>_

with:

<Src0> and <Src1> being either 0 for input port "In A" or 1 for input port "In B".

Note:

 The device replies with the Leitch Error Message (chapter 5.7.2) when

requesting the switching status of Level 1 in Simultaneous switching mode.

5.7.4.6 Direct Crosspoint Take (X:)

This is the Leitch command for switching

>@<sp>X:<Lvl>/<Dest>,<Src><CR> e.g. @<sp>X:0/0,1<CR>

with:
<Lvl> = Level, see below;
<Dest> = Destination, see below;
<Src> = Source, the input port number to which the switch module is to be
connected to, i.e. 0 for input port "In A" or 1 for input port "In B".

Note:

 If the device is in Local Mode, or in Auto Mode, or if a parameter exceeds the

permissible range, the device answers with the Leitch Error Message.

 If the device is in Simultaneous switching mode, the switching of both switch

modules is performed by addressing either switch module (please refer to
chapter 5.7.4.6.2) or the first switch module (chapter 5.7.4.6.3) with the
desired switching position. The response to the command considers the
addressed module only.

For the DEV 1951 three scenarios are to be distinguished:

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5.7.4.6.1 One Switch Module Installed

In this scenario the meaning of the parameters <Lvl> and <Dest> in the command is
<Lvl> = Level, here always "0";
<Dest> = Destination, here always "0".

I.e. the device is to be switched with

>@<sp>X:0/0,<Src><CR> e.g. @<sp>X:0/0,1<CR>

After the execution of the switching command, the device answers with

S:00,<Src> e.g. S:00,1
>_

with:

<Src> having the same meaning and value as in the command.

5.7.4.6.2 Two Switch Modules Installed & Individual Switch Level Assignment Disabled

In this scenario the meaning of the parameters <Lvl> and <Dest> in the command is
<Lvl> = Level, here always "0";
<Dest> = Destination, here either "0" for addressing the first switch module or
"1" for addressing the second switch module.

I.e. the device is to be switched with

>@<sp>X:0/<Dest>,<Src><CR> e.g. @<sp>X:0/1,0<CR>

After the execution of the switching command, the device answers with

S:0<Dest>,<Src> e.g. S:01,0
>_

with:

<Dest> and <Src> having the same meaning and value as in the command.

Note:

 Only in Individual switching mode, the addressed module is switched and in

Simultaneous switching mode either switch module can be addressed to
initiate the switching of both modules.

5.7.4.6.3 Two Switch Modules Installed & Individual Switch Level Assignment Enabled

In this scenario the meaning of the parameters <Lvl> and <Dest> in the command is
<Lvl> = Level, here either "0" for addressing the first switch module or
"1" for addressing the second switch module;
<Dest> = Destination, here always "0".

I.e. the device is to be switched with

>@<sp>X:<Lvl>/0,<Src><CR> e.g. @<sp>X:1/0,1<CR>

After the execution of the switching command, the device answers with

S:<Lvl>0,<Src> e.g. S:10,1
>_

with:

<Lvl> and <Src> having the same meaning and value as in the command.

Note:

 The switching will be performed in Individual switching mode as described

above, in Simultaneous switching mode the first switch module is to be
addressed to initiate the switching of both modules.

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5.8 Control via Remote Interface: QEC Protocol

5.8.1 QEC Protocol Overview

The QEC protocol is another standard for the communication between a host and
the device and can be used for the monitoring and for the switching of the device.
As within the Sandar Prosan protocol messages between the device and the host
are transferred as records, i.e. data between unique header (<STX>, <ACK> or <NAK>)
and end (<ETX>) characters. Each record includes a header byte, a two-byte address,
then either a command byte and necessary data bytes or a negative response byte,
then an end byte, and a checksum byte.
This QEC protocol implementation covers a subset of commands of the protocol
version v2.15 and is implemented to work via TCP/IP on port 23 (standard Telnet
port), and/or via serial interface.

Note:

 The QEC protocol is available only if "QEC" is selected within the CPH setup of

the Web Interface; please refer to chapter 5.5.7.2.3. If it is intended to use the
serial interface to control the device via QEC protocol, the settings of the serial
interface have to be configured accordingly (chapter 4.4.1.1).

 If the serial interface is used for the communication, the QEC serial address

(see below) can be selected via the CPH setup of the Web Interface.

 Within the QEC protocol, the DEV 1951 is treated as a matrix, i.e. as a 2x1

matrix if equipped with one switch module, and as a 4x2 matrix if equipped
with two switch modules. Naturally, the input ports of the second switch
module (i.e. input 3 or input 4) cannot be routed to the output port of the
first switch module (output 1) and vice versa (the input ports of the first switch
module cannot be routed to the output port of the second switch module).

5.8.2 QEC Protocol Communication Structure

The basic command structure is:
Command:

<STX><address><command>{<data>}<ETX><checksum>
Positive Response:

<ACK><address><command>{<data>}<ETX><checksum>
Negative Response:

<NAK><address><negative_response><ETX><checksum>

Notation:
<STX> = start character (= 0x02) [command header]
<ETX> = stop character (= 0x03) [command/response end]
<ACK> = acknowledge character (= 0x06) [positive response header]

<NAK> = not-acknowledge character (= 0x15) [negative response header]

Note:

 A command starts with an <STX> character; a positive response to a command

starts with an <ACK> character; and a negative response starts with the <NAK>
character.

 The <address> consists of two ASCII bytes representing the device address.

When using the serial interface for the communication, the hexadecimal QEC
serial address is used as the device address; please refer to chapter 4.3.7. If the
device is addressed via Ethernet, the device address is 0xFF.

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 The <command> is one hexadecimal ASCII byte representing the command issued.

The <data> part is required for selected commands and in selected positive
responses only and consists of one or more hexadecimal ASCII bytes.

 The <checksum> byte is calculated by a bit-by-bit eXclusive OR (XOR) operation

of all the bytes in the record including header byte (<STX>, <ACK>, or <NAK>) and
stop character (<ETX>).

 The <negative_response> byte indicates the detected type of error:

x Checksum incorrect

The checksum received is detected to be different to the calculated checksum,
an example for this type of response

hexadecimal: 15 46 46 78 03 74
content: <NAK> <address=FF> x <ETX> <checksum>

c Command unrecognized

An unspecified command was received, an example for this type of response

hexadecimal: 15 43 30 63 03 1C
content: <NAK> <address=C0> c <ETX> <checksum>

u Command unavailable

A command was received which is not implemented or which cannot be
executed due to the current operation mode (Local Mode!) of the device,
an example for this type of response

hexadecimal: 15 31 31 75 03 79
content: <NAK> <address=11> u <ETX> <checksum>

i Improper data

A command with too few or too many bytes was received,
an example for this type of response

hexadecimal: 15 46 38 69 03 1B
content: <NAK> <address=F8> i <ETX> <checksum>

d Data out of range

A command was received with data bytes exceeding the range (e.g. of the
output port number or of the input port number) of the device,
an example for this type of response

hexadecimal: 15 30 31 64 03 69
content: <NAK> <address=01> d <ETX> <checksum>

 The switching command (S, chapter 5.8.3.5) can be only executed in

Remote Mode.

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Hex:

0x80 (MSB)

0x40

0x20

0x10

0x08

0x04

0x02

0x01 (LSB)

Bit: 7 6 5 4 3 2 1 0

Content:

1 0 0 0 Overflow

0

Alarm

Change

5.8.3 QEC Commands

The different commands for the communication with the device are described next.

5.8.3.1 Check Change Flag / Unit Status (C)

The command for reading the change flag is issued in the form

hexadecimal: 02 XX XX 43 03 XX
content: <STX> <address> C <ETX> <checksum>

e.g. for a device with the device address 11 connected to the serial port

hexadecimal: 02 31 31 43 03 42
content: <STX> <address=11> C <ETX> <checksum>

The change flag byte (<Cflg>) after "C" in the positive response informs whether
there are any changes in the change queue (please refer to chapter 5.8.3.2). The

C command is supposed to be sent periodically to check if any changes have been

made or if any events have occurred. The change flag byte is defined as follows:

The "Change" bit is set if there have occurred changes on the switching status of
the device, i.e. if the change queue is not empty. The "Alarm" bit is set if any (not
acknowledged) event is pending, and the "Overflow" bit is set if the change queue
is full and if an additional change has occurred before reading the change queue via
the Q command (chapter 5.8.3.2).

Note:

 Since the DEV 1951 provides only (up to) two outputs, it is not possible that the

"Overflow" bit is ever set.

 The change flag byte is cleared (i.e. set to 0x80) only if the queue is empty and

if there are no (not acknowledged) events.

The positive response to this command is

hexadecimal: 06 XX XX 43 8X 03 XX
content: <ACK> <address> C <Cflg> <ETX> <checksum>

e.g. for a device with the device address 11 connected to the serial port with no
changes and no "Alarm" bit set

hexadecimal: 06 31 31 43 80 03 C6
content: <ACK> <address=11> C 0x80 <ETX> <checksum>

and e.g. for the same device with changes and with the "Alarm" bit set returns

hexadecimal: 06 31 31 43 83 03 C5
content: <ACK> <address=11> C 0x83 <ETX> <checksum>

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