GMS VETA Technical Operation Manual

Download

Page 1



Technical Operations Manual



The most important thing we build is trust.

VETA Receiver

Cobham Surveillance GMS Products 1916 Palomar Oaks Way Ste 100 Carlsbad, CA 92008 100-M0133X1 05/27/09 T: 760-496-0055 F: 760-496-0057

www.cobham.com/gms

Page 2

RevisionHistory

Version Date Main Changes from Previous version Edited by

X1 9‐26‐2009 InitialRelease NM

   

 

100-M0133X1 2of33

www.cobham.com/gms

Page 3

Table of Contents

1. ACRONYMS ............................................................................................................................................................................................. 5

2. INTRODUCTION ................................................................................................................................................................................. 6

2.1 Key System Features ....................................................................................................................................................................... 6

3. GENERAL SYSTEM INFORMATION ........................................................................................................................................ 7

3.1 Warranty ............................................................................................................................................................................................... 8

3.2 Safe Operating Procedures .......................................................................................................................................................... 8

4. GETTING STARTED ........................................................................................................................................................................... 9

4.1 Initial Checkout ................................................................................................................................................................................. 9

4.2 Key RF Settings For COFDM Transmission ........................................................................................................................ 10

5. HARDWARE OVERVIEW .............................................................................................................................................................. 12

5.1 VR Front Panel ................................................................................................................................................................................. 12

5.1.1 Power Switch ...............................................................................................................................................................................................12

5.1.2 Received Signal Strength Green LED-s ............................................................................................................................................13

5.1.3 RF Green LED ...............................................................................................................................................................................................13

5.1.4 Lock Yellow LED ..........................................................................................................................................................................................13

5.1.5 Alarm Red LED .............................................................................................................................................................................................13

5.1.6 Green Config LEDS 1 to 8 ......................................................................................................................................................................13

5.1.7 Config Button ..............................................................................................................................................................................................13

5.1.8 RF Button .......................................................................................................................................................................................................14

5.1.9 Mode Button ...............................................................................................................................................................................................14

5.2 VR REAR PANEL .............................................................................................................................................................................. 15

5.2.1 RF AND IF CONNECTIONS ....................................................................................................................................................................15

5.2.2 ASI OUT ......................................................................................................................................................................................................... 16

5.2.3 Video ............................................................................................................................................................................................................... 16

5.2.4 Audio ............................................................................................................................................................................................................... 16

5.2.5 J1 Multifunction DB-15 (F) Connector ............................................................................................................................................17

5.2.6 J2 Multifunction DB-9 (M) Connector .............................................................................................................................................17

5.2.7 RJ-45, VIDEO SERVER (Optional Video Server) ...........................................................................................................................18

5.3 Using External Down-Converters ........................................................................................................................................... 18

6. SOFTWARE CONTROL OVERVIEW ....................................................................................................................................... 22

6.1 System Requirements .................................................................................................................................................................. 22

6.2 Software Installation ................................................................................................................................................................... 22

6.3 VR Configurator Functions ....................................................................................................................................................... 22

7. VETA CHAINING FEATURE ...................................................................................................................................................... 24

7.1 VETA Digital Repeater (VDR) .................................................................................................................................................... 24

7.2 Compact Surveillance Modem (CSM) ................................................................................................................................. 24

7.3 UDP Transmitter ............................................................................................................................................................................ 24

8. SPECIFICATIONS ............................................................................................................................................................................ 25

8.1 C-OFDM RF INPUT........................................................................................................................................................................ 25

8.2 C-OFDM IF INPUT ........................................................................................................................................................................ 25

8.3 DEMODULATION .......................................................................................................................................................................... 25

8.4 VIDEO DECODING ........................................................................................................................................................................ 25

8.5 AUDIO DECODING ....................................................................................................................................................................... 26

100-M0133X1 3of33

www.cobham.com/gms

Page 4

8.6 POWER ................................................................................................................................................................................................ 26

8.7 Physical ............................................................................................................................................................................................... 26

8.8 Environmental ................................................................................................................................................................................. 27

8.9 Optional LAN/USB Interface .................................................................................................................................................... 27

8.10 RS232 DATA OUTPUT ................................................................................................................................................................ 27

8.11 CONTROL ........................................................................................................................................................................................... 27

8.12 REMOTE CONTROL ....................................................................................................................................................................... 27

8.13 LOCAL MONITORING .................................................................................................................................................................. 27

8.14 REMOTE MONITORING .............................................................................................................................................................. 27

8.15 SECURITY OPTION ....................................................................................................................................................................... 27



List of Tables

TABLE 1 – RF CONNECTIONS ......................................................................................................................................................................... 16

TABLE 2 – ASI CONNECTOR ............................................................................................................................................................................ 16

TABLE 3 – VIDEO CONNECTOR ..................................................................................................................................................................... 16

TABLE 4 – AUDIO CONNECTIONS ............................................................................................................................................................... 16

TABLE 5 – J1 MULTIFUNCTION CONNECTOR ....................................................................................................................................... 17

TABLE 6 – J2 MULTIFUNCTION CONNECTOR ....................................................................................................................................... 18



List of Figures

FIGURE 1 – BASIC VDL SETUP .......................................................................................................................................................................... 9

FIGURE 2 – VR RF ESSENTIALS ...................................................................................................................................................................... 11 

FIGURE 3 – VR FRONT VIEW .......................................................................................................................................................................... 12

FIGURE 4 – VR FRONT PANEL ......................................................................................................................................................................... 12

FIGURE 5 – VR OSD ............................................................................................................................................................................................. 14

FIGURE 6 – VR REAR VIEW .............................................................................................................................................................................. 15

FIGURE 7 – BDC SETTINGS WINDOW ....................................................................................................................................................... 20

FIGURE 8 – EXTERNAL BDC SETUP .............................................................................................................................................................. 21

FIGURE 9 – VR CONFIGURATOR COM PORT SELECTOR ................................................................................................................... 23

FIGURE 10 – VR CONFIGURATOR MAIN SCREEN ................................................................................................................................ 23

List of Appendixes

APPENDIX A – LED INDICTORS ..................................................................................................................................................................... 28

APPENDIX B – TROUBLESHOOTING SECTION ....................................................................................................................................... 29 

APPENDIX C – CONTROL CABLE ................................................................................................................................................................... 30

APPENDIX D – VR DEFAULTS, LS BAND .................................................................................................................................................... 31

APPENDIX E – VR DEFAULTS, S1 BAND..................................................................................................................................................... 32

APPENDIX F – VR DEFAULTS, C2 BAND .................................................................................................................................................... 33

100-M0133X1 4of33

www.cobham.com/gms

Page 5

1. Acronyms



Thissectionlistsanddescribesthevariousacronymsusedinthisdocument.

Name Meaning

16QAM 16‐stateQuadratureAmplitudeModulation A/V Audio/Video AES AdvancedEncryptionSystem ABS BasicEncryptionSystem(8bit) CSM CompactSurveillanceModem COFDM CodedOrthogonalFrequencyDivisionMultiplexing CVBS CompositeVideo BDC Block‐DownConverter FEC ForwardErrorCorrection GUI I/O KBaud Kilobaudpersecond Kbps Kilobitspersecond Mbps Megabitspersecond MER ModulationErrorRate MPEG MovingPictureExpertsGroup NTSC NationalTelevisionSystemCommittee PAL PhaseAlternationLine QAM QuadratureAmplitudeModulation QPSK QuadraturePhaseShiftKeying RF RadioFrequency RX Receiver S/N Signal‐to‐NoiseRatio THD TotalHarmonicDistortion TX Transmitter UDP UserDatagramProtocol VDC Volts(DirectCurrent) VDL VETADigitalLink VDR VETADigitalRepeater VMT VETAMiniatureTransmitter VNA VETANetworkAdapter VR VETAReceiver VT VETATransmitter



Graphical User Interface Input/ Output



100-M0133X1 5of33

www.cobham.com/gms

Page 6

2. Introduction

GMS’ Very Efficient Transmission Apparatus (VETA) product line provides several key features that enable high-quality and low-latency wireless Audio/Video (A/V) transmission for the most demanding short or long distance point to point or to multipoint transmission applications. VETA uses a robust digital modulation system known as Coded Orthogonal Frequency Division (COFDM) that provides a robust link that is immune to multipath interference and provides crisp, clear pictures in the most difficult of terrains.

This manual provides information on how to operate the VR (VETA Receiver) as well as pertinent technical information related to the overall system.

2.1 Key System Features

(1)

 COFDM Demodulation 2K Carriers or 400  Bandwidths from 1.25

(2)

MHz to 8 MHz

 Input Frequency: 0.174 to 8.5 GHz (In-Bands)  Internal or External Down-Converters  Low End to End System Latency (down to ~44mS)  Secure – ABS / BCRYPT 128 or 256 Encryption

(3)

 Optional LAN IP Streaming Interface  Optional Video Server

(1), (2)

400 carriers is optional with the 1.25 or 2.5MHz RF bandwidths

(3)

BCRYPT 128 or 256 bit optional

100-M0133X1 6of33

www.cobham.com/gms

Page 7

3. General System Information

The VR (VETA Receiver) receives and demodulates DVB-T 2k carriers’ signals with bandwidths of 6, 7 or 8 MHz. Additionally, optional 1.25 or 2.5 MHz RF bandwidths with 400 carriers allow both increased reception range and larger quantity of simultaneous A/V links to operate in the same frequency band. The wider bandwidths provide greater throughput that allow the system to transfer the highest quality video.

The standard VR is supplied with dual Diversity inputs and internal RF Block-Down Converters (BDCs) with a user selected (at time of purchase) frequency band. The VR’s Maximal Ratio Diversity Combiner provides optimum reception in difficult fading and multipath environments. Additionally, the Diversity combining can provide up to 2.5 dB in link performance, increasing the receiver’s sensitivity to -97.5 dBm at 8 MHz bandwidth! Optional external GMS BDCs are available that can support other frequency bands and optimize reception when mounted directly to remote Antennas. These remote BDC can be powered from the IF line of the VR or, their own power supply. The VR can also be optional supplied with internal LNAs for operation below 860 MHz or no internal Down-Converter or LNA. The latter option is used when the BDC is remotely mounted, usually with an Antenna.

One of the biggest problems encountered in the transition from analog to digital A/V systems has been the inherent digital coding/decoding delays that in some digital systems are 400ms or more. The VETA Transmitters & Receivers employ internal MPEG-2 or MPEG-4

(4)

(User Selectable) Encoders and

Decoders with specially designed ‘low-delay’ coding technology, which provides an end to end latency down to 44ms without the introduction of any further MPEG encoding artifacts. This ensures that the picture you see is what is happening now - crucial for applications such as surveillance, and law enforcement, where personnel are reacting to real-time events.

Control and status monitoring can be accomplished via the VR Front Panel or via an external IBM PC and GMS’ M.S. Windows application control software. Critical performance parameters like Signal To Noise Ratio (SNR), Pre and Post FEC Bit Error Rate (BER) and Packet Errors are provided both on the On-Screen Display and M.S. Windows control program.

The VR also includes internal low-latency Audio/Video Decoder (MPEG-2 or MPEG-4

(4)

) and output circuits that provide video, L/R audio and data channels. Security of transmission is ensured by the use of Standard ABS encryption or, for greater security, the optional BCRYPT 128 or 256 bit scrambling algorithms.

The optional VETA IP Network Adapter (VNA) provides the VR with a video streaming capability for network interfacing. An optional M.S. Windows software Decoder and Recording application is also available. See Section 7 on VETA ‘Chaining’ feature. Alternatively the VR can have an integrated video server installed for web streaming applications.

The VR’s versatile housing can be optionally mounted in a suitcase, can sit on a desktop, or be configured to mount in a 19-inch instrumentation rack.

(4)

Option Dependant

100-M0133X1 7of33

www.cobham.com/gms

Page 8

3.1 Warranty

GMS offers a 12 month standard product warranty. During this period, should the customer encounter a fault with the equipment we recommend the following course of action:

 Check the support section of the website for information on that product and any

software/firmware upgrades.

 If fault persists call our support line and report the fault. If fault persists and you are

informed to return the product, please obtain an RMA number from the GMS support department or website and ship the equipment with the RMA number displayed and a description of the fault. Please email the support section the airway bill/consignment number for tracking purposes.

Depending on the nature of the fault GMS endeavor to repair the equipment and return it to the customer within 14 days of the item arriving at our workshops. Obviously it is impossible to cater for all types of faults and to manage 100% replacement part availability, and delays are sometimes inevitable.

Please contact GMS for details of packages that can be tailored to meet your individual needs, whether they are service availability, technical training, local geographic support or dedicated spares holdings.

3.2 Safe Operating Procedures

• Ensure that the power supply arrangements are adequate to meet the requirements of VETA product.

• Operate within the environmental limits specified for the product.

• Only authorized, trained personnel should open the product. There are no functions that required the User to gain access to the interior of the product.

100-M0133X1 8of33

www.cobham.com/gms

Page 9

4. Getting Started

(VT)

The VR is pre-configured by GMS prior to shipment (based on customer requirements), thus is ready to work “right out of the box”.

NOTE: Additional cables and antennas may be delivered by GMS based on customer application. Contact GMS for further information.

4.1 Initial Checkout

Prior to installing a VR unit into the desired target environment, an initial checkout should be performed to ensure proper operation of the unit. The initial checkout consists of configuring a basic VDL (Veta Digital LINK) wireless link. In the case outlined, we will assume a VETA Miniature Transmitter (VMT) is used to transmit to the VR. Note, that any MPEG-2, DVB-T compliant transmitter can be employed instead if the VR is set-up in standard DVB-T Mode (RF BW 6, 7, or 8 MHz) and not in ultra-low delay mode.

Figure 1 shows a basic VDL configuration wireless link. The following setup can be done, either wirelessly with antennas, or through hard line connection with 50Ω cable. In either case, make sure there is enough attenuation from the Tx to the Rx to avoid overdriving the receiver. In most DVB-T receivers, their optimal input power ranges from -30 to -70 dBm. The VR shown has internal BDCC installed locally within unit, which is our standard VR configuration. The steps necessary to setup the configuration shown are stated below:



(VR)

Figure 1 – Basic VDL Setup

100-M0133X1 9of33

www.cobham.com/gms

Page 10

 Install omni-directional antennas (or ones best suited for the application) onto the RF IN A

and RF IN B ports on the Veta Receiver and one on the SMA RF connector on the VMT. (Hard lined connection can be made instead, make sure enough attenuation is present when performing a hard line checkout)

 Attach the VMT breakout cable (780-C0449 or equivalent) and apply +12VDC to the red

pigtail and GND to the black pigtail. Ensure power supply can supply at least 0.5A at +12VDC.

 Attach a composite video source to the BNC video input cable that is located on the VMT

breakout cable.

 Note which VMT Configuration 1 through 16 is shown (rotary switch or through control

software); this number must match the receiver.

 Attach a video cable from BNC VID output port on the VR (VETA Receiver) to the

composite Video input port of a video monitor.

 Apply +12Vdc to the VR, pins 1, 2, +12V and 3, 4 ground to the J2 dB connector (if using

provided cable use the red (+12V) and black (GND) pigtails. Power supply must be able to source 2 AMP at 12VDC.

 Turn on the video source and video monitor equipment.  Turn on the VR with the PWR switch on the front panel (up is ON). The VR will output a

‘blue’ screen to your video monitor when no video is present to the VR.

 Once the VR has powered-up, ensure the selected green LED1 through 16 (above the

CONF button) matches the same configuration LED as the transmitter. If not use the CONF button to select the correct configuration, select the same number as the

transmitter. (See section 5.1.6 for explanation of binary representation of configs).

 If the configuration LED is flashing green press the RF button on the front keypad (this

action provides power to the internal down converters) and the LED will stay solid green.

 After approximately 5 seconds, the link should be established and video provided by the

source should be displayed on the monitor. The RF green LED should light as well as the signal strength green LED indicators.

 Press the MODE button to turn on the diagnostic OSD (on screen display).  If the red Alarm LED lights it may be an indication that the receiver is unable to lock to a

signal. Check the following:

 Ensure the receiver and transmitter lit configuration green LED (1 through 16)

located above the CONFIG button is the same. If not press the CONFIG button on either the transmitter or receiver so they match. Ensure the PWR switch for the VR is ON and that the RF button has been pressed



after apply +12VDC.

 If the TX and RX are physically too close to each other, the RX may overload

causing distorted Video. You may reduce the power of the TX (low power mode through VMT GUI) or move the TX & RX further apart. 50 Ohm RF attenuators can also be used to attenuate power from the Tx.

4.2 Key RF Settings For COFDM Transmission

The RF settings shown in Figure 2 show the key COFDM configurations for setting up any COFDM link. The settings underlined in RED must be matched specifically to the VETA Transmitter for proper RF lock and demodulation (the other COFDM parameters are auto-

100-M0133X1 10of33

www.cobham.com/gms

Page 11

detected). In general, when troubleshooting a RF link, the operator should make sure that the following RF parameters are matched at both the Transmitter and Receiver.

Figure 2 – VR RF Essentials

The initial checkout described above is simply to check the basic video operation of the VR unit. For further details on the connectors, monitoring and controlling the VR read thoroughly through this manual starting with section 5, hardware overview, and section 6. For a full explanation of the control software see Manual: 100-M0131.



100-M0133X1 11of33

www.cobham.com/gms

Page 12

5. Hardware Overview



The VR versatile housing can be optionally mounted in a suitcase, sit on a desktop or be configured to mount in a 19 inch instrumentation rack.

All interface connectors are located in the back of the unit. The front consists of a standard push button panel, LED indicators and a toggle power switch. The front and back panels of the VR unit are illustrated in Figure 3, 4 and 6 and discussed in detailed in this section.

5.1 VR Front Panel

The front button panel, LED indicators and power switch are explained in this section.

Figure 3 – VR Front View

Figure 4 – VR front panel

5.1.1 Power Switch

The Power Switch located on the far right side of the panel enables +VDC to the system; up position is ON, down position is OFF. On powering the VR, the eight green configuration LED-s (see section 5.1.6) will light up indicating the current configuration (the one that was active

100-M0133X1 12of33

www.cobham.com/gms

Page 13

when the VR power was turned off). In addition the red Alarm LED (see section 5.15) may light if the VR is unable to lock or decode the incoming signal.

5.1.2 Received Signal Strength Green LED-s

The green LED-s (located above the MODE button) when ON indicate the signal strength (the RF input power level) from the minimum (no LEDs light) to the maximum strength (all four LEDs light).

5.1.3 RF Green LED

The RF green LED indicator (located above RF button) when ON indicates that the VR is locked to the incoming signal; system is operating normally.

5.1.4 Lock Yellow LED

The LOCK (key icon) yellow LED indicator (located above the RF button) when is ON indicates that incoming signal is encrypted.

5.1.5 Alarm Red LED

The Alarm red LED indicator (located above the RF button) indicates a fault condition or an alarm when ON. This can be an indication that there is no RF lock; no video in the Transport Stream or non matching Encryption Key.

5.1.6 Green Config LEDS 1 to 8

The 8 green LEDs (located above the CONFIG button) indicate which one of the sixteen stored configurations is currently selected. Stored configurations are discussed in Section 6 of this manual and in section 5.1.8 below. If Config LED is flashing, the BDC power is OFF, and the RX

will not be able to receive a signal through the BDC.

The sixteen configurations are represented in binary format with LED-4 being the most significant bit, and LED-1 being the least significant. (Note: LED-5 will always be light, which indicates receiver is in 16-configuration mode). When LEDs 1-4 are all light, this represents config group 16, while when LEDs 1-4 are off, this represent config group 1.

5.1.7 Config Button

The Config button, when pressed, selects the next configuration from memory. The user will see the LEDs on the front panel increment in a binary fashion. The 16 configurations in memory define all potential variables including center frequency, modulation bandwidth, Guard Interval and OFDM polarity. See section 6 and software manual 100-M0131 for a full discussion on setting the parameters for each configuration.

100-M0133X1 13of33

www.cobham.com/gms

Page 14



Note that this configuration selection (1 through 16) must match the transmitter’s OFDM

modulation parameters selection for the link to work.

5.1.8 RF Button

Pressing the RF button toggles (ON/OFF) DC power to the Block-Down Converters.

Flashing Config LED indicates OFF state, and solid green – ON state. When using the internal BDCC, the DC power must be on.

5.1.9 Mode Button

Pressing the Mode button toggles the diagnostic On Screen Display (OSD). Pressing the mode button will toggle the OSD on with the spectrum display showing input A from the Composite Video output port. Pressing the mode button a second time will change the spectrum display to input B. Pressing a third time will turn the OSD off. The diagnostic data (displayed on top of the current video) includes, signal to noise data, input power level, frequency as well as some captured parameters from the incoming RF signal, as shown in Figure 5. The OSD is explained in detail in Manual 100-M0131.

Figure 5 – VR OSD

100-M0133X1 14of33

www.cobham.com/gms

Page 15

5.2 VR REAR PANEL

The rear panel contains the connectors necessary for interfacing to the VR. Detailed descriptions of all the VR connectors and components (see Figure 6) are included in the following sections.



Figure 6 – VR Rear View

5.2.1 RF AND IF CONNECTIONS

The VR can be configured with internal down converters, which is the normal default hardware setup, or with external down converters.

When using internal down converters the antennas are connected to the diversity RF input, RF IN A and RF IN B. Internal down converters take the microwave RF signal and down convert it to the UHF intermediate frequency (IF) which comes out on IF OUT A and IF OUT B BNC connectors. The IF OUT A and IF OUT B are then connected with external cables to the IF IN A and IF IN B BNC connectors respectively.

If using external down converters the IF outputs from the external down converters are connected to the IF IN A and IF IN B (in this scenario the RF IN A / B and IF OUT A /B are not used). See section 5.3 below on using external down converters.

 WARNING: external down converters can be supplied with +12VDC through the IF IN A or IF IN B ports (from the VR). Ensure the external DC can handle the +12VDC through the IF port before activating power (or for that matter ensure the power is off before connecting) otherwise damage could occur to the down converters. The +12V power can be activated using GMS control software or the RF button on the front panel.

100-M0133X1 15of33

www.cobham.com/gms

Page 16

Table 1 – RF Connections

Connector Name Connector Type Comments

RF IN A SMA (F) To internal down converter RF IN B SMA (F) To internal down converter IF OUT A BNC(F) From internal down

IF OUT B BNC(F) From internal down

IF IN A BNC(F) To demodulator/decoder IF IN B BNC(F) To demodulator/decoder

5.2.2 ASI OUT

One ASI (asynchronous serial interface) connector is provided. This is a 75 ohm AC coupled output. The ASI can be used if external decoders are preferred, or to a ASI recorder or Multiplexer.

Table 2 – ASI Connector

converter

Connector Name

ASI BNC (F) ASI out stream

5.2.3 Video

One composite video out 75 ohm impedance, PAL/NTSC standard is provided. S-Video output is also provided but is located on the multifunction J1 dB-15 (F) connector which is described under section 5.2.5.

Table 3 – Video Connector

Connector Name

VID BNC (F) Composite video out

5.2.4 Audio

A Lemo 5 pin connector is provided for audio output. The output level is nominal line level with output impedance of 50 ohm. Audio is single ended. There are no audio gain adjustments.

Table 4 – Audio Connections

Connector Type Comments

Connector Name

Connector Type

PIN Function

AUD Lemo 5-PIN (F) 1 NC AUD Lemo 5-PIN (F) 2 NC AUD Lemo 5-PIN (F) 3 GND AUD Lemo 5-PIN (F) 4 LEFT AUDIO AUD Lemo 5-PIN (F) 5 RIGHT AUDIO

100-M0133X1 16of33

www.cobham.com/gms

Page 17

5.2.5 J1 Multifunction DB-15 (F) Connector

The multifunction DB-15 connector provides for DC power out, received signal strength indicator, A & B, S-Video output and the necessary clocks, data and grounds for the optional chaining interface (an interface which allows multiple services to be sent via one RF link).

The DC power out is basically a loop through from the DC power in and should reflect the input DC level (see section 5.2.6). It is used to provide power for optional equipment and setups.

S-Video provides a step up in terms of video quality from composite video out (as described in section 5.2.3) and be taken from pins 14 and 15.

The remaining pins and their functions are described in the table below.

Table 5 – J1 Multifunction Connector

Connector Name

Connector Type

Pin Function Comments

J1 DB - 15 (F) 1 PWR OUT 9VDC-18VDC J1 DB - 15 (F) 2 PWR OUT J1 DB - 15 (F) 3 GND J1 DB - 15 (F) 4 GND J1 DB - 15 (F) 5 RSSI A 0 - 4.5V J1 DB - 15 (F) 6 RSSI B 0 - 4.5V J1 DB - 15 (F) 7 Chain CLK OUT J1 DB - 15 (F) 8 GND J1 DB - 15 (F) 9 Chain DATA OUT J1 DB - 15 (F) 10 Chain CLK IN J1 DB - 15 (F) 11 GND J1 DB - 15 (F) 12 Chain DATA IN J1 DB - 15 (F) 13 GND J1 DB - 15 (F) 14 S-LUMA OUT J1 DB - 15 (F) 15 S-CHROMA OUT

5.2.6 J2 Multifunction DB-9 (M) Connector

The multifunction DB-9 connector provides for DC power in, RS232 TX & RX control and RS232 TX & RX data.

The DC nominal voltage is 12VDC, minimum is 9VDC and maximum should not exceed 18VDC. Reverse polarity protection is provided but no protection for over voltage. Power pins 1 & 2 are internally connected as well as ground pins 3 &4.

The receiver can be controlled remotely with GMS PC control software (which is explained in more detail in Manual 100-M0131). This is done by connecting the PC RS232 transmit and receive lines to the RS232 TX CTRL and RS232 RX CTRL, pins 5 and 6.

In addition serial RS232 data, sent from the transmitter, can be received on pins 8 & 9, RS232 TX DATA and RS232 RX DATA using a PC RS232 port or another appropriate device.

100-M0133X1 17of33

www.cobham.com/gms

Page 18

The remaining pins and their functions are described in the table below.

Table 6 – J2 Multifunction Connector

Connector Name

Connector Type

Pin Function Comments

J2 DB - 9(M) 1 PWR IN 9VDC -18VDC J2 DB - 9(M) 2 PWR IN J2 DB - 9(M) 3 GND J2 DB - 9(M) 4 GND J2 DB - 9(M) 5 RS232 TX CTRL J2 DB - 9(M) 6 RS232 RX CTRL J2 DB - 9(M) 7 GND J2 DB - 9(M) 8 RS232 TX DATA J2 DB - 9(M) 9 RS232 RX DATA

5.2.7 RJ-45, VIDEO SERVER (Optional Video Server)

A VETA Receiver can optionally be configured to have an integrated video server installed. The video output from the VR will now show an overlay generated via the video server. When connected to a valid network the Video server will show its’ IP address on the video output as an overlay. If no Ethernet is connected, an icon of a RJ-45 with an ‘X’ through it will show in the upper right corner of the video output to indicate no network connection was made.

When a valid network has been attached, the user can open their internet browser and enter the IP address shown on the video overlay. The video shown at the video output of the VR should now be simultaneously streaming to the web browser. In order to make changes to the video server, the user will need the username and password:

The default user name is: admin

The default password is: 9999

To turn off the video overlay:

Suppose, for example that the IP address of the device is 192.168.1.168. The user would type in: http://192.168.1.168/tailpage.htm. (After login) The user would select “ON” or “OFF” in the OSD column.

Warning: Please write down the IP address of the device before turning off the OSD.

For more details on the video server, see the Video Server Manual.

5.3 Using External Down-Converters

Down converters have an LO (local oscillator) which is mixed with the DVB-T transmitter frequency and it then converts it to the IF - intermediate frequency. The VR (VETA receiver) locks on to the IF frequency in order to be able to receive the C-OFDM signal. The VR calculates

100-M0133X1 18of33

www.cobham.com/gms

Page 19

the IF frequency based on the LO (in MHz) of the down converter as well as the DVB-T transmitter frequency (in MHz) and whether the LO is using high or low side injection (relative to the band of transmission). These parameters must be entered into the GMS control software setup screens (see Figure 7 and also refer to manual 100-M0131) regardless if the VR is configured with internal or external down converters. However when the unit leaves the factory, these parameters are pre-configured when using internal down converters. When using external down converters it is up to the user to enter these parameters. If necessary contact the manufacturer of the BDC (block down converter) to find the LO, if it’s using ‘high’ or ‘low’ side injection and the gain of the unit. Although the BDC gain setting is not needed for the operation of the system it is used in calculating of input levels displayed by OSD (on screen display).

The OFDM polarity of ‘normal’ or ‘invert’ is usually selected based on the polarity of the transmitter.

The VR can source +VDC through the ‘IF IN B’ and ‘IF IN A’ ports so that the external BDC-s can be powered through the IF cable (referred to as ‘remote power’) instead of using a ‘local’ power source at the BDC. This feature makes powering the BDC-s convenient and less messy than dealing with additional power supplies. It also makes it easier to install the BDC-s in places where it may be difficult to have a local power source. The BDC Power with options ‘yes’ or ‘no’ turns ON or OFF the +VDC on the IF line. The DC voltage up the IF line is equal to the voltage supplied to the VR. If using long cable runs to external BDC the DC drop across the IF line may be such that the BDC are not able to power. In this case, one work around (besides using higher quality coax, with less DC loss/ft) is to increase the supply voltage to the VR. As

mentioned above in section 5.2.1, before selecting ‘yes’ ensure the external BDC has the capability of being powered up through the IF line. If not it could cause damage to the unit.

100-M0133X1 19of33

www.cobham.com/gms

Page 20

LO frequency must be entered in MHz.

Turns +VDC ‘ON’ or ‘OFF’ on the IF line

Choose between High or Low side injection

Enter gain of the BDC

Figure 7 – BDC Settings Window

External BDC-s are connected as shown in Figure 8. Ensure to use high quality 75 ohm impedance RF cable which can handle VHF to UHF frequencies from approximately 45 MHz to 1000 MHz. When using external BDC-s keep in mind that there is a limit to the length of the IF cable (cable between the BDC and the VR) which is based on:

o Excessive DC voltage drop: BDC-s usually have a specification calling out a minimum

DC voltage for their units to work. Excessive cable length can cause the DC voltage to drop below this minimum causing the system to fail. This voltage drop can usually be calculated based on the manufacturer’s cable properties. Or you can simply measure the DC voltage at the BDC (remember to keep a load on when making this measurement). The bottom line is that when using ‘remote’ power the user needs to ensure the DC voltage from the VR to the BDC is above the required minimum.

o The work-around to excessive DC voltage drop is to power up the BDC-s using ‘local’

power. Hence if the IF cable length is causing too much of a voltage drop, use a local power supply to power up the BDC.

o Excessive IF signal loss: Excessive cable length can also cause too much signal loss

(noted in dB) before it gets to the VR. Once again the manufacturer’s cable specifications can be used to calculate the dB loss based on frequency and cable length. It can also be measured using a Spectrum Analyzer if one is available. Signal loss results in system degradation noted usually in poor SNR readings and low input levels as seen on the OSD. Remember that a 3 dB loss corresponds to half power loss!

o One possible work-around to excessive signal loss (when running long IF cable lengths) is

to use a good quality in-line amplifier. Make sure to follow manufacturer’s instructions very closely because improper installation of an inline-amplifier could introduce other problems.

100-M0133X1 20of33

www.cobham.com/gms

Page 21

Figure 8 – External BDC Setup



100-M0133X1 21of33

www.cobham.com/gms

Page 22

6. Software Control Overview

Configuration, control and monitoring of the VR units are enabled through the use of GMS’ optional (sold separately) MS Windows-based VR Configurator software program. This Graphical User Interface (GUI) program provides the end user with a straightforward way to interface with the VR unit. During normal operation, once a VDL link is established, the VR Configurator GUI can be used to monitor the link statistics as well as control the receiver. Monitoring the link statistics is an optional operation therefore, if desired, the VR Configurator GUI does not need to be active and can be disconnected from the VR unit.

6.1 System Requirements

The VR Configurator program has been developed and tested on Windows 2000, Windows XP and Windows NT. Although the VR Configurator program may work properly on other operating systems, no GMS support or assistance can be provided concerning other operating systems.

6.2 Software Installation

The following instructions outline the installation process for the VR Configurator program:

Insert provided CD-ROM into computer.

Click on ‘setup.exe’ file. This will launch the GMS_VR Setup program and several initial setup files will begin to be copied onto the computer.

After the initial setup files are copied over, the GMS_VR Setup program will prompt the user to close any applications that are running. Once all other programs are exited, click on the ‘OK’ button.

The GMS_VR Setup program will prompt the user to click on the ‘computer icon’ button to begin installation. If desired, the user can change the destination directory from the default. Click on the ‘computer icon’ button.

The GMS_VR Setup program will then prompt the user to ‘Choose Program Group’. If desired, the user can change the program group from the default. Click on the ‘Continue’ button.

After installing the VR Configurator program, the GMS_VR Setup program will put up a window indicating that setup was completed successfully. Click ‘OK’.

6.3 VR Configurator Functions

The VR Configurator program provides the user access to many different configuration, control and monitoring options. When the VR Configurator program is launched, the screen shown in Figure 9 is displayed. The user should first select the serial port their computer is connected to via the Serial Port Selector and Status region. If the selected serial port is valid, the gray-colored status box will show ‘Ready’. The Device Selector region allows the end user to choose to interface to a VR (receiver) unit. To configure a VR, select the ‘VR’ box in the Device Selector region. Once the ‘VR’ box is selected, the screen shown in Figure 10 is displayed. The VR

100-M0133X1 22of33

www.cobham.com/gms

Page 23

Configurator program contains function buttons and all the configurable settings available on a VETA Rx.

For more detail see the Software Manual: 100-M0131.

Figure 9 – VR Configurator COM Port Selector

Figure 10 – VR Configurator Main Screen

100-M0133X1 23of33

www.cobham.com/gms

Page 24

7. VETA Chaining Feature

The VETA series of products use a Proprietary Transport stream protocol called ‘Chaining’ to create the VDR (VETA Digital Repeater), the CSM (Compact Surveillance Modem) or a UDP Tx. This is all available by utilizing the chaining feature which comes standard on all VETA Tx, VR and VNA. Contact factory for more information about the Chaining feature and the variety of applications it can be employed with.

7.1 VETA Digital Repeater (VDR)

An In band or cross band repeater can be made very simply with the VETA series Transmitter (VT-2W, VT-C, or VT-L) in conjunction with a VETA Receiver. The user simply has to connect the ‘Chaining Out’ of the VR into the ‘Chaining In’ of a VETA Tx.

7.2 Compact Surveillance Modem (CSM)

The VETA Compact Surveillance Modem is much like the VDR with the addition of the VETA NETWORK ADAPTOR (VNA). The VNA allows for IP streaming of video, or with a complement CSM a LAN Bridge (CSB) can be created across the link.

7.3 UDP Transmitter

A UDP transmitter can easily be employed using the Chaining Out of a VNA into the Chaining In of a VETA TX. UDP can be sent to the VNA via the RJ45 connector which is converted to Chaining within the VNA and delivered to the VETA TX through the Chaining interface. On the receiver Side, a VR will send its Chaining Out to the Chaining In of a VNA. The VNA can be connected to a router or simply another computer to distribute the UDP data.



100-M0133X1 24of33

www.cobham.com/gms

Page 25

8. Specifications

8.1 C-OFDM RF INPUT

Input Ports: 2 Connectors: BNC-F Input Impedance: 50 Ohms, <1.5:1 VSWR Input Frequency: 0.9 to 8.5 GHz (In-Bands) Frequency Accuracy: +/-10 ppm

8.2 C-OFDM IF INPUT

Input Ports: 2 Input Connector: BNC-F Input Impedance: 75 Ohms, <1.5:1 VSWR Input Frequency: 0.174 to 849 MHz Frequency Accuracy: +/-2 ppm Final IF Bandwidth: 10 MHz @-3dB LO Radiation: <-25 dBm DC Output: 12V @ 500 mA

External Down-Converters (optional) Frequencies >845 MHz

8.3 DEMODULATION

DVB-T # of Carriers: 2k DVB-T Bandwidth: 8/ 7/ 6 MHz DVB-T Guard Interval: 1/32, 1/16, 1/8, 1/4 DVB-T FEC 1/2, 2/3, 3/4, 5/6, 7/8 DVB-T Modulation QPSK, 16-QAM, 64-QAM Optional VETA Narrow BW Modes

Threshold: (6,7, & 8 MHz BW)

16-QAM ½: <-89 dBm 64-QAM ½: <-83dBm

(Optional Diversity can improve threshold by 2.5 dB) VETA BW Threshold: -100 dBm to -105dBm

8.4 VIDEO DECODING

Compression Type: MPEG-2 (Field or Frame Encoding, Selectable) Auto Detect Desired. Compression Standard: ISO/IEC 13818-2 with Intra-Refresh update mode for low Latency operation Video format standards: NTSC or PAL

VETA # of Carriers: 400 VETA Bandwidth: 2.5 MHz or 1.25 MHz VETA Guard 1/16, 1/8 VETA FEC 1/3, 2/3 VETA Modulation QPSK, 16QAM

QPSK ½: <-95 dBm

100-M0133X1 25of33

www.cobham.com/gms

Page 26

Profiles: SP@ML or MP@ML Chroma Format: 4:2:0 or 4:2:2 Line Standard: 525 and 625 (NTSC/PAL) Horizontal Resolution: 704, 528, 480, 352 pixels Veta Systems Latency end to end delay: Down to ~44ms for 6,7, or 8 MHz, Narrow BW to ~120mS (w/VETA TX Only, mode dependant)

Video Outputs 1- Composite w/OSD, 1-S-Video Standards: NTSC (with and without pedestal) or PAL Video Connectors: Composite – BNC-F,

S-Video – p/o J-1, DB-15F Output Impedance: 75 Ohms Output Level: 1V p-p Frequency Response: 10 Hz to 4 MHz, +/- 1.5 dB

8.5 AUDIO DECODING

Number of Channels: 2

Decompression Type: MPEG Layer I & II (Musicam) or NICAM (User Selectable) Musicam

Compression Standard: ISO/IEC 13818-3(Musicam) Bit rates: 256 kbit/s/ch (Musicam) All bitrates supported Sampling Frequency: 48 kHz only (Musicam) Nicam (Ultra-Low Latency)

Bits per Sample: 12 or 8

Sampling Frequency: 32 KHz, 16 KHz or 8 KHz Frequency Response: 200 Hz to 10 KHz, +/- 1.0 dB Analogue Audio Outputs: Un-balanced outputs, Line Level Output Impedance: <100 Ohms Unbalanced Connector: LEMO 5 pin

8.6 POWER

DC Voltage Range: 9 - 18 V Reverse Voltage Protection Power Consumption: 12 Watts W/ Optional AC to DC Adapter AC Voltage: 90-264 VAC @ 45-440 Hz AC Power Consumption: 13 Watts

Circuit Breaker Protector

8.7 Physical

Less Handles Dimensions: 9.752” W x 4.8” D x 1.754” H

24.77 cm W x 12.19 cm D x 4.45 cm H With Handles Dimensions: 9.752” W x 6.8” D x 1.754” H

24.77 cm W x 17.27 cm D x 4.45 cm H Weight: 3.69 lbs (1.67 kg)

100-M0133X1 26of33

www.cobham.com/gms

Page 27

8.8 Environmental

Operational Temperature: -10 to +70 deg C

8.9 Optional LAN/USB Interface

Refer to GMS’ VETA IP Network Adapter (VNA) Data Sheet. This optional module provides 10/100 Base-T LAN (RJ-45) Interface that can be used for audio/video/user-data streaming

8.10 RS232 DATA OUTPUT

Baud Rate: Up to 115 k baud. Connector: p/o J1, DB-9M

8.11 CONTROL

Local Control: Front Panel with 16 channel/mode select, Preset key selection (1-16).

8.12 REMOTE CONTROL

RS232 Control from PC GUI: All receiver options and functions are controlled via

the remote interface.

8.13 LOCAL MONITORING

Control Panel: Signal Strength (Bar Graph), Channel & Mode, and Rx Lock, invalid

Encryption Key

OSD: Signal to Noise Ratio (SNR), Pre and Post FEC Bit Error Rate (BER) and Packet Errors.

8.14 REMOTE MONITORING

All RX measurements and controls

8.15 SECURITY OPTION

ABS is standard. The VR can optionally be provided with BCRYPT 128 or 256 for protecting the signal in sensitive applications.

100-M0133X1 27of33

www.cobham.com/gms

Page 28

Appendix A – LED Indictors

LED condition Meaning Action

No Config LED-s lit Config LED is flashing

Red Alarm Lit RF LED Off

Red Alarm Lit RF LED On

Signal strength LED-s off

Unit is OFF Indicates that BDC

power is off

Turn the unit On Push the Mode button to

turn BDC-s On. Ensure that RF source is

active and has correct frequency.

No RF Signal Lock

Ensure that BDC-s are turned on. Ensure there is no interfering signal

Ensure that Video is enabled Has RF Signal Lock, but no decoder Lock

at the Transmitter.

Ensure that scrambling keys

matched No incoming RF signal Ensure that RF source is

active.

100-M0133X1 28of33

www.cobham.com/gms

Page 29

Appendix B – Troubleshooting Section

Symptom Possible Reason Action

Interference.

Receive antenna

positioning. Poor Link performance

Poor alignment of

directional antennas.

Unsuitable Antennas.

Reduced Transmit Power.

Reduced

Horizontal Resolution.

image quality

Video Bit Rate.

SNR Reading: 0.0 but, other RF

OFDM Polarity Mismatch

parameters locked

Remove interfering signal or switch to alternative frequency. Where possible mount antennas unobstructed, away from other objects and as high as possible. Ensure a proper alignment.

Ensure that antennas are in a right band. Ensure that attenuation setting is appropriate for direct output or amplifiers connected. Select horizontal resolution that matches the resolution of the source. Ensure appropriate Audio mode is selected or fully disabled if not required. Either on the Tx or Rx (which ever is more accessible) switch the OFDM polarity

100-M0133X1 29of33

www.cobham.com/gms

Page 30

Appendix C – Control Cable

100-M0133X1 30of33

www.cobham.com/gms

Page 31



Appendix D – VR DEFAULTS, LS BAND

The most important thing we build is trust.

100-M0133X1

www.cobham.com/gms

31of33

Page 32

Appendix E – VR DEFAULTS, S1 BAND

100-M0133X1 32of33

www.cobham.com/gms

Page 33

Appendix F – VR DEFAULTS, C2 BAND



100-M0133X1 33of33

www.cobham.com/gms