Symmetricom ATS-6511A, ATS-6511B, ATS-6511C User Manual

Download

ATS-6511A ATS-6511B ATS-6511C

Dual Fiber Input Distribution

Users Guide

Version 5.x

Release K

Sep 2013

Revision History

Revision Description Date Approved

G Added SNMP Functionality.

Updated help menu Added alarm Changed to

reference:frequency:external

H Added model ATS-6511C,

4395B-(1,5,10) and 4385B Changed fiber alarm when in incorrect fiber_mode. Improved short term stability when locked to 6501 (version 4.3.5).

Removed clock_freq_step

configuration not readable

status

and clock_phase_step from table 6 Added RMS to jitter spec.

Updated for Tflex 5.x commands Firewall settings/command.

04/18/2012 WF

02/18/2013 WF

04/22/13 GAR

8/13/13 RRW

ATS-6511A/B/C Users Guide

DOC 6511_Release K

Table of Contents

1.1 Introduction .......................................................................................................... 1

1.2 Ordering Information ........................................................................................... 1

2.1 Powering on the ATS-6511 .................................................................................. 3

2.2 Communicating with the ATS-6511 .................................................................... 4

2.3 ATS-6511 Installation .......................................................................................... 6

2.4 ATS-6511 Modules .............................................................................................. 6

2.5 Fiber Optic Input Behavior ................................................................................ 14

2.6 Fiber Modes/Calibration .................................................................................... 16

2.7 Setting the System On Time Point (OTP) .......................................................... 19

2.8 Using an External Frequency Reference (ATS-6511B or C) ............................. 20

2.9 System Configuration Files (Syscfg) ................................................................. 21

3.1 Front Panel ......................................................................................................... 23

General Information ............................................................................................. 1

Installation ............................................................................................................ 3

2.2.1 DHCP ............................................................................................................ 4

2.2.2 Static IP Addresses ....................................................................................... 4

2.2.2.1

2.2.2.2

Network ..................................................................................................... 4

Console Cable ........................................................................................... 4

2.2.3 Setting an IP Address .................................................................................... 5

2.2.4 Firewall Settings ........................................................................................... 6

2.2.5 USB Ports ...................................................................................................... 6

2.4.1 Power Supplies .............................................................................................. 6

2.4.2 Output Cards ................................................................................................. 7

2.4.2.1 4394A (PPS/DC IRIG) .................................................................................. 7

2.4.2.2 4395A-10 / 4395B-10 (10MHz) .................................................................... 9

2.4.2.3 4395A-5 / 4395B-5 (5MHz) ........................................................................ 10

2.4.2.4 4395A-1 / 4395B-1 (1MHz) ........................................................................ 10

2.4.2.5 4387A (Modulated IRIG/NASA36) ............................................................ 11

2.4.2.6 4399A (L-Band BPSK module) ................................................................... 12

2.5.1 Auto-Switching ........................................................................................... 14

2.5.2 Manual Switching ....................................................................................... 15

2.6.1 Two Way Mode (ATS-6501 with 4372A-T Fiber Card) ............................ 16

2.6.2 Two Way Disabled (4372A-T Fiber Card) ................................................. 17

2.6.3 One-Way Fiber Calibration ......................................................................... 17

2.6.4 Asymmetrical Fiber Paths To a ATS 6511 Input Channel ......................... 18

2.6.5 TSC-4340A ................................................................................................. 18

Operations .......................................................................................................... 23

3.1.1 Power Supply Indicators .................................................................................. 23

3.1.2 Alarm Indicator ........................................................................................... 23

3.1.3 Oscillator Locked (Osc Lock) Indicator ..................................................... 24

3.1.4 Fiber A & B Indicators ............................................................................... 24

3.1.4 Outputs Enabled Indicator .......................................................................... 24

ATS-6511A/B/C Users Guide

DOC 6511_Release K

3.1.5. Fans ............................................................................................................. 24

3.1.6. Flash Card ................................................................................................... 25

3.1.7. Display Button ............................................................................................ 25

3.2 Rear Panel .......................................................................................................... 25

3.3 Software ............................................................................................................. 26

3.3.1 Current Version ........................................................................................... 26

3.3.2 Software Updates ........................................................................................ 26

3.3.2.1

3.3.2.2

Flash Card Replacement .......................................................................... 27

Remote Software Update ........................................................................ 27

3.3.3 Declassifying the System ............................................................................ 29

3.4 User Interfaces .................................................................................................... 29

3.4.1 Operating System ........................................................................................ 29

3.4.2 Telnet .......................................................................................................... 29

3.4.2.1

Command Port (1700) ............................................................................. 29

3.4.3.2 Diagnostic Port (1800) ................................................................................. 31

3.4.3.3

3.4.3.4

3.4.3.5

Status Port (1900) .................................................................................... 32

Average TIC Data Port (2100) ................................................................ 33

Raw TIC Data Port (2101) ...................................................................... 33

3.4.4 File Transfer Protocol (FTP) ....................................................................... 34

3.4.5 Simple Network Management Protocol (SNMP) ....................................... 34

3.5 Status Command ................................................................................................ 35

3.6 System Verification .................................................................................................... 35

Theory of Operations ......................................................................................... 44

4.1 Generation of Timing Signals ............................................................................ 44

4.2 Startup Sequence ................................................................................................ 44

Maintenance ....................................................................................................... 46

5.1 Internal Inspection .................................................................................................. 46

5.2 Fiber Cable Inspection ............................................................................................ 46

5.3 Fan Filter ................................................................................................................. 47

Troubleshooting ................................................................................................. 48

6.1 Front Panel Indications ....................................................................................... 48

6.2 Alarm Light ........................................................................................................ 48

6.2.1 Power Supplies ............................................................................................ 48

6.2.2 Fiber Inputs ................................................................................................. 49

6.2.3 Outputs Enabled .......................................................................................... 51

6.2.4 Internal Clock .............................................................................................. 52

6.2.5 Over Temperature and Fans ........................................................................ 52

6.2.6 PPS Outputs ................................................................................................ 53

6.2.7 IRIG Outputs ................................................................................................... 54

6.2.8 NASA36 Outputs ............................................................................................ 55

6.2.9 Configuration Not Readable ............................................................................ 56

6.3 Communication Problems .................................................................................. 56

6.3.1 LAN ............................................................................................................ 56

6.3.2 Console (Command Port) ........................................................................... 56

ATS-6511A/B/C Users Guide

DOC 6511_Release K

6.3.3 External Reference Adapter ATS 94001-5071A (6511B and C only) ....... 56

6.4 Syslog Command ............................................................................................... 57

6.5 Troubleshooting Summary .................................................................................... 58

Appendix A System Specifications .................................................................................. 60

Appendix B Status Command Fields ................................................................................ 66

Appendix C Status Port (1900) Example ......................................................................... 71

Appendix D. Detailed Command Information ................................................................ 80

Appendix E System Configuration (syscfg) ................................................................... 105

Appendix F Julian Date Calendars ................................................................................. 108

Figures

Figure 1 Rear Panel Output Card Locations ....................................................................... 7

Figure 2 Single Slot Output Module ................................................................................... 7

Figure 3 Timing System Diagram ..................................................................................... 19

Figure 4 External Frequency Reference ........................................................................... 20

Figure 5 ATS-6511 Front Panel ........................................................................................ 23

Figure 6 ATS-6511A Rear Panel ...................................................................................... 26

Figure 7 Rear Panel Fiber, LAN, and USB Connections ................................................ 26

Figure 8 Front Panel Flash Card ...................................................................................... 27

iii

ATS-6511A/B/C Users Guide

DOC 6511_Release K

1 General Information

1.1 Introduction

The ATS-6511 is a state-of-the-art signal distribution system providing GPS disciplined time and frequency references when locked to an ATS-6501. It utilizes an internal Ovenized Crystal Oscillator (OCXO) and low noise synthesizer (LNS) in conjunction with fiber optic inputs from an ATS-6501 to provide outputs that are characterized by the short-term stability of the OCXO, medium term stability of the ATS-6501 internal Rubidium reference and the long-term stability of the GPS constellation and/or and external Cesium reference. This provides a scalable architecture that allows users to fulfill a wide range of current and future requirements with a single unit. The ATS-6511 is suitable for a variety of precise time and frequency applications. Additionally, the ATS-6511B provides the user with the capability to enhance the frequency stability and holdover performance of the unit by using an external cesium (Cs) clock as the reference. An internal rubidium option is also available in the ATS-6511B-R.

In applications where reliability is a must the ATS-6511 is capable of operating from an AC (100 – 240VAC, 50-60 Hz) or DC Power -48 VDC (SELV type) (-18 to -60 VDC) source and comes with two fully redundant power supplies. The unit is capable of operating from a single supply in the event one of the two power supplies fails.

1.2 Ordering Information

ATS-6511A: Standard dual fiber input time and frequency distribution chassis. Dual AC input supplies included. Requires an external fiber time and frequency reference and includes two 1 PPS/DC IRIG, one 10 MHz, and one AM IRIG output module.

ATS-6511B: Long term holdover capability dual fiber input time and frequency distribution chassis. Dual AC input supplies included. Requires an external fiber time and frequency reference and includes two 1 PPS/DC IRIG, one 10 MHz, and one AM IRIG output module. A rear panel BNC connector is included for an external holdover reference, for instance a Cesium. The R option is available to provide an internal Rubidium for holdover.

ATS-6511C: Improved Phase Noise and Allan Deviation performance for the 1, 5, 10Mhz outputs. All other features equivalent to the ATS 6511B.

Option D (DC Power Input): Provides DC input -48 VDC (SELV type) (-18 to -60 VDC) capability instead of AC for one of the supplies. The second power supply is still AC.

Option D2 (Dual DC Power Input): Provides dual DC input -48 VDC (SELV type) (-18 to -60 VDC) capability instead of AC.

Option F (Front Panel Memory Card): Provides access to the unit’s non-volatile memory via the front panel. This option allows users to perform a complete software upgrade in the field without returning the unit to Symmetricom.

Option R (Internal Rubidium, ATS 6511B & C only): Provides internal Rubidium for improved holdover performance when both fiber inputs are not available.

ATS-6511A/B/C Users Guide

DOC 6511_Release K

Output Cards: The ATS-6511 has ten output cards available:

1. 4395A-10 Four 10Mhz Outputs

2. 4395B-10 Four 10Mhz Outputs (Lower Noise)

3. 4395A-5 Four 5Mhz Outputs

4. 4395B-5 Four 5Mhz Outputs (Lower Noise)

5. 4395A-1 Four 1Mhz Outputs

6. 4395B-1 Four 1Mhz Outputs (Lower Noise)

7. 4394A Programmable PPS and DC IRIG Module. Users can define the

signal types and operating parameters. Default set up is two 1PPS Outputs and two DC IRIG Outputs(Default = B000)

8. 4387A Four Modulated IRIG Outputs (Default = B120) or NASA36

9. 4387A-6V Four Modulated IRIG Outputs (Default = B120) or NASA36,

6 Vpp outputs.

10. 4399A L-Band card with one 1 PPS output and four RF outputs.*

*Note: This card takes up two of the six card slots available in the rear of the unit and can only be used in the ATS-6511. This card will not operate in the ATS-6501.

ATS 94000-115200 (formerly ATS 6501 OP001) USB Console Cable:: Allows users to connect to the system Command Port via a serial cable. This kit includes the programmed USB/Serial cable and Null Modem cable to connect the USB/Serial cable to a PC.

ATS 94001-5071A (formerly ATS 6501 OP002) USB External Reference Communication Cable: Provides a serial communications port to an external 5071A frequency reference. (ATS-6511B and ATS-6511C ONLY)

Notes:

1. The correct Symmetricom part number is constructed by appending the desired options to the base model in alphabetical order. None of the options are mutually exclusive so users can select as many options as desired.

Example Part Number: ATS-6511A-DF Description: Standard Dual Fiber Input with 1 AC power supply, 1 DC power supply, and the front panel flash option.

2. Fiber cables sold separately.

3. All units include Ethernet and fiber control.

4. Contact Symmetricom (www.symmetricom.com) for current pricing and availability.

ATS-6511A/B/C Users Guide

DOC 6511_Release K

2 Installation

The ATS-6511 provides a number of features which may require additional setup and this section provides a guideline for the basic setup. After completing this section, the ATS-6511 will produce timing outputs to the coarse calibration accuracies specified in Appendix A. The ATS6511 is designed to be quickly and easily integrated with other system components. Just a few steps are required in setting up the system so that it will begin producing accurate timing outputs. In order to set the system up, users will need to power up the system and set up communications in order to have access to the system command port. The only inputs required for operation of the ATS-6511 are at least one power source and one fiber optic input sourced from a 4372A/4372A-T installed in an ATS-6501 with revision 3.6.3 or newer software.

2.1 Powering on the ATS-6511

Apply power to the system by supplying input power to at least one of the two power supplies. When power is applied to the ATS-6511 the front panel will go through a self test and then the ATS-6511 will begin booting up.

Note: If power is applied to both power supplies the Status Indicator on the front panel of both power supplies should be green. If power is applied to only one of the two supplies the power supply without input power should have a red Status Indicator and the unit’s Alarm Indicator should be red.

Note: The ATS-6511 front panel Power-On Self Test (POST) will occur even if the front panel software flash is removed.

A. The Date/Time display will sequentially test each segment on each individual position

within the display.

B. One at a time, each position of the display will display the number 8 starting from the far

left and working to the right.

C. Each LED below the Date/Time Display (Alarm, Oscillator Locked, Input A, Input B, &

Outputs Enabled) will be turned on one at a time starting from the left to right. As each LED is tested it will be green, then red, and then turn off with the exception of the Input A indicator, this indicator will turn red, then green, then off.

D. The Date/Time display will then display “-9876543210” on the front panel. E. Lastly the Date/Time display will have a “-“ in the center of each position in the display. F. While the ATS-6511 is booting up and waiting for the internal oscillator to lock the Osc

Lock, Input A, and Input B LED indicators on the front panel below the Date/Time display should be Red and the bars in the display after the POST will move to the top, then center, then bottom and then go out. This display will repeat cycling the bars on the Date/Time display as long as the unit is not tracking one of the input fiber signals. Once the unit obtains the date/time from the fiber input (A or B) the Input A and/or Input B LED will turn green, the Osc Lock light should turn green, the front panel will begin displaying the present Date/Time, and the Outputs Enabled indicator will turn green within ~2 minutes.

Note: As the ATS-6511 warms up, the Oscillator Lock indicator should turn green within ~5 minutes after the system is turned on and the system locks to one of the Fiber inputs. The Alarm light may stay on until the Outputs are enabled. This is normal and does not indicate there is a problem with the unit. When the unit has locked the OCXO to one of the fiber inputs, the outputs will be enabled and the Outputs Enabled LED will turn green within ~2 minutes.

ATS-6511A/B/C Users Guide

DOC 6511_Release K

2.2 Communicating with the ATS-6511

Operators are capable of communicating with the system through a LAN connection directly or via one of the USB Ports when using (ATS 94000-115200) USB to Serial cable to access the command port.

2.2.1 DHCP

The ATS-6511 runs DHCP by default and will be assigned an IP address if it is connected to a network with a DHCP server. The ATS- 6511 will display the current IP address assigned to the unit in the Date/Time display after pressing and releasing the Display pushbutton on the front panel. Users can use this IP Address to access the systems command port (1700).

Note: If the LAN Cable is not connected to the unit an IP Address is not assigned and the front panel display button will not display an IP address for the system. Once the LAN cable is connected to the unit it will automatically attempt to obtain an IP address from a DHCP Server. If this does not work you may need to power cycle the unit.

2.2.2 Static IP Addresses

If you require a Static IP Address there are two options to set the network information in the system.

2.2.2.1 Network

If the network has a DCHP Server you can obtain the IP Address (ip addr) by pressing and releasing the Display pushbutton on the front panel. Telnet into the system using telnet ip addr

1700. Once the “ATS-6511>” prompt is displayed use the network_config command to manually configure the IP address for the unit. (See section 2.2.3).

If the network does not have a DHCP Server, press and hold the front panel display pushbutton for ~10 seconds until the display shows the IP Address of 192.168.0.1. This temporarily sets the IP Address of the unit. Telnet into the system using telnet 192.168.0.1 1700. Once the “ATS6511>” prompt is displayed use the network_config command to manually configure the IP address for the unit. (See section 2.2.3).

Note: If the LAN Cable is removed from the unit and reconnected the unit will attempt to obtain an IP Address from the DHCP Server. If the default IP Address (192.168.0.1) was set it may get reset. Press the Display Button on the front panel to make sure the IP Address is still set, if not press and hold the button until the default IP Address is set again.

2.2.2.2 Console Cable

This feature allows local users to set the unit up without having to access the system via the network. Connect a terminal to one of the USB ports on the rear panel using the USB to Serial conversion cable (ATS 94000-115200). Changes can be made using any terminal program (e.g., HyperTerm, TeraTerm) from the serial port of a computer/terminal. The communication settings are 115200 Baud, No Parity, 8 Data Bits, and 1 Stop Bit. Once connectivity is established the user will see the ATS-6511> command prompt. Execute the network_config command to set the IP Address, Netmask, Broadcast IP, and/or Default Gateway for the system if you are using a static IP Address. (See section 2.2.3).

ATS-6511A/B/C Users Guide

DOC 6511_Release K

Note: Make sure the USB Console Cable (ATS 94000-115200) is installed in one of the two USB ports when the system is powered on. If not, power the system down, plug the cable in and re-apply power.

Caution: The system default settings allows the operator to set a default IP address by pressing and holding the Display pushbutton on the front panel for ~10 seconds. This will set the IP address to 192.168.0.1. The IP address will be displayed on the front panel after it is set. If the button is held down too long and the IP Address is set to the default by mistake, you may be able to clear this by pulling the LAN connection on the rear panel and plugging the connector back in. If not, power-cycle the unit to restore the proper network settings. This front panel IP reset feature can be disabled using the frontpanel_button command. Users are cautioned that this reset feature is ON by default and must be turned off if this is not the desired behavior.

2.2.3 Setting an IP Address

Use the following steps to set the IP Address on the ATS-6511.

A. Telnet into the system telnet ip addr 1700 or connect to the unit via the (ATS 94000-

115200) USB Console Cable and the ATS-6511> prompt should appear.

B. Use the network_config command and options to set the system to the desired network

settings.

network_config --mode <DHCP|static> --ip <ip addr> --mask <mask> --broadcast <broadcast> -gateway <gateway>]

[Example]

network_config --mode static --ip 192.168.1.50 --mask 255.255.255.0 --broadcast 192.168.1.255

--gateway 192.168.1.1

C. These network settings will take effect immediately. Users should see the following:

<working> ………..

D. Users connected via the network will need to reconnect to the system using the newly

assigned static IP Address. Users do not need to save these changes; they are automatically stored on the system. The ATS-6511 will start up with the new settings each time it is rebooted or power cycled.

E. Users can also view the current network settings using the network command. This will

display the current settings.

ATS-6511>network

[mode] static [static] [broadcast] 192.168.150.255 [default_gateway] 102.168.150.1 [ip] 192.168.150.85 [netmask] 255.255.255.0 [OK] 2013-08-13T14:11:12Z

Once timed out, the connection will drop.

ATS-6511A/B/C Users Guide

DOC 6511_Release K

2.2.4 Firewall Settings

The system IP firewall has a default “allow all” policy. To enable the firewall, the customer needs to create a firewall rules file on the product file system named /mod/tsc/firewall.rules. There are example firewall rules files on the product in the directory /usr/tsc/site/firewall. Example rules files may be copied to the correct location and edited on the product using ‘vi’. Once the rules file is setup, reboot the product.

Note that miss-configuration of the firewall can lock out network access to the product. If that occurs, the firewall may be disabled by using a USB command port adapter, and executing the command firewall --disable. This removes the current firewall rules and resets it to immediately allow all traffic exposing the device.

The firewall is the standard FreeBSD IPFW. Full documentation on the firewall configuration may be found here:

http://www.freebsd.org/doc/en/books/handbook/firewalls-ipfw.html

2.2.5 USB Ports

The USB ports on the rear panel allow:

• Users to access the command port (ATS 94000-115200). See section 2.2.2.2. Users

can set the IP Address on the box following the instructions on section 2.2.3.B-C. The system will automatically connect to the command port and provide the ATS6511> command prompt.

• The ATS-6511B to communicate with a 5071A Cesium Clock (ATS 94001-5071A).

See section 2.7.

2.3 ATS-6511 Installation

The ATS-6511 is ready for installation into a standard 19" (48.3 cm) rack using either slides or shelves and will take up 1U of rack space. The C-300-S Series rack slides from General Devices or equivalent slides are recommended.

CAUTION: Use the screws provided with the unit to mount the rails to the side of the chassis. If longer screws are used, you could damage the power supplies or prevent them from being removed from the chassis.

2.4 ATS-6511 Modules

2.4.1 Power Supplies

The ATS-6511 operates with two power supplies capable of operating on different power sources. The 4385A (AC Power Supply) and 4386A (DC Power Supply) are available. The ATS-6511 is capable of operating on one power supply in the event the other fails or its input source fails. Power Supply #1 is on the left and Power Supply #2 is on the right. See Appendix A for the specifications on the Power Supplies.

ATS-6511A/B/C Users Guide

DOC 6511_Release K

2.4.2 Output Cards

The ATS-6511 has the capability using six output cards in each unit. The cards slots are identified by number so the operator is capable of determining the slot of the card in the show command and identifying the cards physical location in the chassis. Figure 1 shows the rear panel layout of the unit from left to right.

Slot 1 Slot 3 Slot 5 Slot 2 Slot 4 Slot 6

Figure 1 Rear Panel Output Card Locations

The ATS-6511 will operate with six different types of output cards. All output cards except the 4399A can be operated in any of the six slots. The 4399A is a double wide module that can only be installed in slots 3 and 5. The divider between Slots 3 and Slot 5 must be removed to accommodate installation of the 4399A L-Band module. To remove this divider, remove modules that are installed in these slots. Remove the screw located on the top of this divider. After removing this screw, pull the divider out the back of the chassis and install the 4399 Card. Once the card is installed power cycle the unit to allow the system to start up with the current card configuration.

At start up the unit will automatically detect and configure the system based on the cards installed. The cards are also hot swappable. Each of the standard output cards has four output connectors with the output number identified as shown below in Figure 2. See Appendix A for the specifications of each output module.

2.4.2.1 4394A (PPS/DC IRIG)

The factory default for this module provides two 1PPS outputs and two DC IRIG (B000) Outputs. The default configuration sets Outputs 1 and 2 to 1PPS and Outputs 3 and 4 to DC IRIG. The output types are user selectable/programmable. Users can change the signal types (PPS/DC IRIG), the PPS signal parameters, and the IRIG signal types on individual output ports.

• PPS: Valid PPS settings are 1, 10, 100, 1K, 10K, 100K, 1M PPS and 10M PPS. To set the PPS signal parameters use the pps command:

ATS-6511> pps [slot#] [port#] [pulse period] [pulse width]

Figure 2 Single Slot Output Module

ATS-6511A/B/C Users Guide

DOC 6511_Release K

The following example sets the PPS on Slot 1, Port 2 to 1MPPS and the pulse width to 500nsec (1/2 the duty cycle).

ATS-6511>pps 1 2 1e-6 5e-7

The following rules apply:

1. PERIOD - period of pulse in seconds(max of 1, min of 1e-7)

2. WIDTH - pulse width in seconds (minimum of 5e-8)

3. For PPS Rates where the duty cycle is 10 µ s or greater the pulse_width must be a

multiple of 10 µs, at least 10 µs wide, and at most half the duty cycle of the pulse_period.

4. For PPS rates where half the duty cycle is less than 10 µ s, the pulse_width must be

exactly one-half the pulse_period. (See example above.)

The system will generate an error message if the values are not correct or entered improperly.

To verify the settings use the settings hardware:slots:N command (N=Slot #) to obtain the current settings for a particular card.

ATS-6511> settings hardware:slots:1 [tsc4373] [ports] [1] [pps_period] 1 [pps_width] 1.000000000000000e-04 [type] pps [2]

[pps_period] 1.000000000000000e-06 [pps_width] 5.000000000000000e-07

[type] pps [3] [format] B [signal_word] 0 [type] irig [4] [format] B [signal_word] 0 [type] irig

• IRIG: Valid DC IRIG Codes are A(000,003,007), B(000,003,007), D002, E002, G002, and H002. Default is B000. To set the IRIG Code for the individual ports use the irig command:

ATS-6511> irig [slot#] [port#] [Code A-H] [Code Format <NNN>]

The following example sets the IRIG for Slot 1, Port 3 to A 003.

ATS-6511>irig 1 3 A 003

DOC 6511_Release K

ATS-6511A/B/C Users Guide

The system will generate an error message if the operator attempts to enter an unsupported or invalid code.

To verify the settings use the settings hardware:slots:N command (N=Slot #) to obtain the current settings for a particular card.

ATS-6511> settings hardware:slots:1 [tsc4373] [ports] [1] [pps_period] 1 [pps_width] 1.000000000000000e-04 [type] pps [2] [pps_period] 1.000000000000000e-06 [pps_width] 5.000000000000000e-07 [type] pps

[3] [format] A [signal_word] 3 [type] irig

[4] [format] B [signal_word] 0 [type] irig [OK] 2010-05-27T16:40:11Z

Note: The system will drop the leading Zeros in the signal_word.

To verify the card is working properly use the status hardware:outputs:slots:N command (N=Slot #) to obtain the current settings for a particular card.

ATS-6511>status hardware:outputs:slots:1 [ports] [1] [status] good [2] [status] good [3] [status] good [4] [status] good [power] enabled [type] 4394A [OK] 2013-08-13T14:27:55Z

2.4.2.2 4395A-10 / 4395B-10 (10MHz)

No programming is required for these modules. These modules will also work in any of the 6 card slots. To verify these cards are working properly use the status hardware:outputs:slots:N command (N = slot number) to obtain the current status for a particular card.

ATS-6501>status hardware:outputs:slots:3

[ports] [1]

DOC 6511_Release K

ATS-6511A/B/C Users Guide

[status] good [2] [status] good [3] [status] good [4] [status] good [power] enabled [type] 4395B-10 [OK] 2013-08-13T14:29:15Z

2.4.2.3 4395A-5 / 4395B-5 (5MHz)

ATS-6501>status hardware:outputs:slots:4

[ports] [1] [status] good [2] [status] good [3] [status] good [4] [status] good [power] enabled [type] 4395B-5 [OK] 2013-08-13T14:29:40Z

2.4.2.4 4395A-1 / 4395B-1 (1MHz)

ATS-6501>status hardware:outputs:slots:5

[ports] [1] [status] good [2] [status] good [3] [status] good [4] [status] good [power] enabled [type] 4395B-1 [OK] 2013-08-13T14:30:25Z

ATS-6511A/B/C Users Guide

DOC 6511_Release K

2.4.2.5 4387A (Modulated IRIG/NASA36)

This module provides four Amplitude Modulated (AM) IRIG Outputs or the NASA36 Serial Time Code. Valid AM IRIG Codes are A(130, 133, 137), B(120, 123, 127), E(111, 112, 121), G(141, 142, 147), and H(111, 112, 121, 122, 127). Default is B120.

• IRIG: To set the IRIG Code for the individual ports use the irig command:

ATS-6511> irig [slot#] [port#] [Code A-H] [Code Format <NNN>] [epoch]

The following example sets the IRIG Code for Slot 5, Port 3 to G 141.

ATS-6511>irig 5 3 G 141 0

[OK] 2013-08-13T14:31:11Z

The system will generate an error message if the operator attempts to enter an unsupported or invalid code.

To verify the settings use the settings hardware:slots:N command (N=Slot #) to obtain the current settings for a particular card.

ATS-6511> settings hardware:slots:5 [tsc4387] [ports] [1] [epoch_127] false [format] B [signal_word] 120 [type] irig [2] [epoch_127] false [format] B [signal_word] 120 [type] irig

[3] [epoch_127] false [format] G [signal_word] 141 [type] irig

[4] [epoch_127] false [format] B [signal_word] 120 [type] irig [OK] 2013-08-13T14:32:28Z

• NASA36: To set the NASA 36 Code for the individual ports use the nasa36

command:

ATS-6511> nasa36 [slot#] [port#]

The following example sets the Time Code for Slot 5, Port 3 to NASA 36.

ATS-6511>nasa36 5 3

DOC 6511_Release K

ATS-6511A/B/C Users Guide

The system will generate an error message if the operator attempts to enter an unsupported or invalid code.

To verify the settings use the settings hardware:slots:N command (N=Slot #) to obtain the current settings for a particular card.

ATS-6511> settings hardware:slots:5 [tsc4387] [ports] [1] [format] B [signal_word] 120 [type] irig [2] [format] B [signal_word] 120 [type] irig

[3]

[format] G [signal_word] 141

[type] nasa36

[4] [format] B [signal_word] 120 [type] irig [OK] 2013-08-13T14:35:35Z

To verify the card is working properly use the status hardware:outputs:slots:N command (N=Slot #) to obtain the current settings for a particular card.

ATS-6511>status hardware:outputs:slots:5 [ports] [1] [status] good [2] [status] good [3] [status] good [4] [status] good [power] enabled [type] 4387A [OK] 2013-08-13T14:36:00Z

2.4.2.6 4399A (L-Band BPSK module)

This module provides four RF outputs and one 1 PPS output on SMA connectors and is controlled via the 9 pin RS-232 located on its panel. The 4399A serial interface is via RS-232, at 115200 baud, 8-N-1, with flow control set to “none”. The serial interface is the means for issuing commands to the module as well as sending the file containing the BPSK bit pattern. Commands are case-sensitive. The BPSK bit pattern file can be sent to the board using Hyperterminal or any other communications program that supports the XMODEM protocol.

To send the bit pattern file using Hyperterminal, follow these instructions:

ATS-6511A/B/C Users Guide

DOC 6511_Release K

1.) Type “sendfile <ENTER>” at the terminal. The unit will then initiate erasure of the

on-board flash. This erasure process will take approximately 1 minute.

2.) Once erasure is complete, the terminal will prompt “send file.” The device will then

send an initiate character to the terminal once every 10 seconds until the file is sent. (NOTE: this process can be aborted by typing “Ctrl-C <ENTER> <ENTER>” but the flash will remain empty.)

3.) To send the file, select “Transfer” from the menu bar, followed by “Send File…”.

4.) Browse to the bit pattern file desired, and then select “Xmodem” from the Protocol

list.

5.) Click “Send”. The file will then be transferred to the device.

6.) Once transmission is complete, the Xmodem transfer window will close and the

device will send a termination character to the terminal once per second.

7.) Type “<ENTER> <ENTER>” to exit the transfer routine.

4399A Commands:

Note: The following commands are case-sensitive.

deviceid: reads and returns the rev number of the board.

sendfile: erases the flash memory and waits for the input of a new BPSK file. The BPSK file is

transmitted via XMODEM. If a BPSK signal is running when this command is issued, the signal output will be stopped.

freq: used to set the carrier frequency of the BPSK signal. After “freq <ENTER>” is typed, the terminal will prompt for the frequency. Frequency is entered in MHz, in hexadecimal format (i.e. 1500 MHz will be entered as “5DC”). Valid frequencies are 900 MHz – 1175 MHz, 1225 MHz – 1575 MHz, and 1625 MHz – 1750 MHz.

chiprate: used to set the rate at which the BPSK bits are transmitted. After “chiprate <ENTER>” is typed, the terminal will prompt for the chip rate. Chip rate is entered in MCPS, in hexadecimal format (i.e. 10 MCPS will be entered as “a”, and 20 MCPS will be entered as “14”). Valid chip rates are 1 MCPS – 20 MCPS.

run: used to reinitialize the signal output with the current frequency and chip rate settings.

stop: used to disable the signal output.

The following is a sample instruction set to initialize and run the 4399A unit at a frequency of 1 GHz, with a chip rate of 16 MCPS:

Welcome. 4399A> freq Enter freq>3e8 Done. 4399A> chiprate Enter rate>10 Done. 4399A> run

ATS-6511A/B/C Users Guide

DOC 6511_Release K

Done.

4399A BPSK File Format:

The BPSK file is sent to the 4399A unit through the serial port, via XMODEM. The file to be sent must be in binary format, with the first 32 bits designating the full length of the file. The BPSK signal may then begin on the 33rd bit and continue to the end of the file. This means that the BPSK file for a 10,000,000-chip pattern will actually be 10,000,032 bits long, and therefore the first 32 bits of the file must read 009896A0 (when viewed with a hex editor).

This device is designed to utilize chip patterns in 1,000,000-chip increments in size, but can accommodate any chip size that is divisible by 16. Maximum capacity of the internal flash memory is 32 megabits. When sending an output, the 4399A will continuously repeat the entire bit pattern in sequential order, from bit 33 to the end. Using this format, “1” represents the carrier signal and “0” represents the carrier signal after a 180 degree phase shift.

A very short sample of a 64-bit BPSK pattern follows:

00000060 D1CAEF91 3134E17C

This will cause the unit to continuously repeat the following pattern:

1101 0001 1100 1010 1110 1111 1001 0001 0011 0001 0011 0100 1110 0001 0111 1100

2.5 Fiber Optic Input Behavior

The ATS-6511 does not have a front panel switch to select the desired Fiber Input. This is accomplished via the auto switching feature or the command port. The default setting has Input A as the primary input, the Auto-Switching feature enabled, the minimum time for the primary source to be valid is 60 seconds, and the rearm feature is on. Once the ATS-6501s are operating and their outputs are enabled they will send the reference signals via fiber to the ATS-6511(s). One ATS-6501 drives Input A, a redundant ATS-6501 drives Input B. The ATS-6511 will select Input A once that fiber pair comes on line and the system locks to it since it is the default input.

Once the ATS-6511 is operating and both fiber inputs are present the unit will monitor the fiber inputs. The fiber pair driving the ATS-6511 is displayed on the front panel; Input A or Input B will be ON and Green. The status input:switch command will indicate the switching mode and the selected fiber pair. (i.e. Auto Switch: A). The alternate source input will also indicate the status of the fiber and if the signal is present and it will flash Green (On for 1 second, off for three seconds). If neither fiber input is available, the ATS-6511B or C will enter holdover mode using the internal Rubidium (ATS-6511B-FR or ATS-6511C-FR option) if available, the external reference input if available (ATS-6511B or C), or the internal OCXO (ATS-6511A, B or C).

2.5.1 Auto-Switching

When enabled, one of the two fiber pairs (A or B) will be the primary source. System settings can be checked using the settings fiber:switching command.

ATS-6511>settings fiber:switching

ATS-6511A/B/C Users Guide

DOC 6511_Release K

[auto_rearm] true [master] A [min_valid_time] 1 [mode] auto [OK] 2013-08-13T17:26:23Z

The mode indicates the ATS-6511 is using the auto switching feature. If there is a loss of signal on Fiber A (master) the Input A indicator will turn RED to indicate there is an issue with that source and the system will automatically switch over to Input B and the Input B indicator will turn ON. The status input:switch command will indicate an auto switch occurred as well as which fiber is currently selected (i.e. Auto Switched: B (now in B after an autoswitch). Once the signals to Input A are restored the INPUT A indicator will flash Green (on for 1 second/off for three seconds). When the master source (in this case Input A) remains valid for the [min_valid_time] (seconds-in this case 60) and the [auto_rearm] is true, the ATS-6511 will automatically switch back to the master source, in this case Input A becomes the active channel.

Note: If the [auto_rearm] is false, the system will remain on Input B until the operator commands the system to return to Input A. Once Input A is restored the Input A indicator will flash Green (on for 1 second/off for three seconds) and the system will remain in this mode until the operator commands the system to switch back to A. (fiber_switching auto A 60)

Caution: The system will not switch back to the primary source unless the manual option is used or until the [min_valid_time] has expired if you are using the auto mode with the norearm option off.

If there is a loss of signal on Input B (the alternate source) the INPUT B indicator will turn RED to indicate which fiber pair has been lost. Once the signals are restored the INPUT B indicator will flash Green indicating the source is available.

When both fiber inputs are not available, the unit will enter holdover mode. In the ATS-6511A, the internal OCXO is the holdover reference. The ATS-6511B-R provides an internal Rubidium reference for holdover, or can use the 10 MHz provided to the rear panel as the holdover reference. The ATS-6511B provides the user the ability to use an external input for holdover in addition to the internal OCXO.

2.5.2 Manual Switching

When the auto switching feature is disabled the operator must select the desired input (A or B) as the primary (master) source, in the example below Fiber A is the master. System settings can be checked using the settings fiber:switching command.

ATS-6511>fiber_switching manual A

[OK] 2013-08-13T17:30:02Z

ATS-6511>settings fiber:switching

[auto_rearm] true [master] A [min_valid_time] 30 [mode] manual [OK] 2013-08-13T17:32:52Z

ATS-6511A/B/C Users Guide

DOC 6511_Release K

The mode indicates the ATS-6511 is using the manual feature. In this case the Input A indicator will be On and Green to indicate the system is locked to the primary (master) source. The Input B indicator will flash RED (on 1 second/off three seconds) to indicate the source is available and the system is in the manual switching mode.

If there is a loss of signal on Fiber A the Input A indicator will turn RED to indicate there is an issue with that source however the system will not automatically switch over to Input B. The Alarm Indicator will turn RED and the Oscillator Lock Indicator will go out indicating the system is free running on the internal clock. Once Input A is restored the Input A indicator will flash RED (on 1 second/off three seconds) to indicate the source is available. Once the ATS-6511 locks to the reference signal on Fiber A input the Input A indicator and the Oscillator Lock Indicator will turn Green and the Alarm Indicator will go out.

The indications for Input B will not change unless the ATS-6511 is commanded to use Input B (fiber_switching manual B) or the input signal to Fiber B is Lost. Once this occurs the Input B indicator will turn Green and the Oscillator Lock Indicator should come on within a few seconds. After this the Alarm indicator should go out. The system will remain on Input B until commanded otherwise. Once the signals are restored The Input A indicator will flash RED (on 1 second/off three seconds) to indicate the source is available and the system is in the manual switching mode. The Fiber B indicator will turn RED and remain on if the input signal is lost.

2.6 Fiber Modes/Calibration

The ATS-6501/6511 systems are capable of operating in three distinct modes. This section assumes the on-time-point (OTP) of the system is the rear panel outputs on the ATS-6511. This may not be the desired location for the OTP; users should refer to section 2.7 for information on changing the location of the OTP for the system.

Warning: Users are cautioned to set the system (ATS-6501, TSC 4340A, and ATS 6511A/B/C) up in the desired operational configuration and calibrate any ATS-6511s in the two_way_disabled fiber mode to ensure the 1PPS outputs are either known or compensated for as described below. Changes to the system configuration will likely require re-calibration. If you have questions contact Symmetricom.

2.6.1 Two Way Mode (ATS-6501 with 4372A-T Fiber Card)

This mode uses the data exchange between the ATS-6501 4372A-T (Two-Way fiber card) and the fiber A/B input on the ATS-6511 to calibrate the output of the ATS-6511 and set the system on-time point (OTP) to the rear panel of the ATS-6511. The fiber path may pass through a TSC4340A. This method provides three distinct advantages. 1) The delays between the 6501 and 6511 are constantly measured and the system will compensate for any changes (i.e. diurnal changes with or without a 4340A). 2) The pair of fibers for Input A and Input B do not have to be the same length and could take separate paths. 3) The system calibration is automatically done for each pair of fiber inputs as long as the fibers for that pair are of equal length. If the individual fibers used in the pair paths to Input A or B are different length, the path length difference between the two fibers must be determined and the fiber delay difference programmed in for each input (A and/or B).

ATS-6511A/B/C Users Guide

DOC 6511_Release K

The system is set up to use the legacy fiber mode by default. The following shows the operator how to set the two-way mode and verify the system settings (settings fiber:mode).

ATS-6511A>fiber_mode two_way

[OK] 2013-08-13T17:37:30Z

ATS-6511A>settings fiber:mode two_way [OK] 2013-08-13T18:01:06Z

2.6.2 Two Way Disabled (4372A-T Fiber Card)

There may be some installations where the two way exchange over the fiber is not desired. This mode can be disabled using the fiber_mode command as shown below. Use the settings

fiber:mode command to verify the system settings. If these settings are correct ensure you use the save command to save the system settings

ATS-6511A>fiber_mode two_way_disabled

[OK] 2011-06-06T19:35:52Z

ATS-6511A>settings fiber:mode two_way_disabled [OK] 2013-08-13T18:01:26Z

Note: Refer to Section 2.6.4 to properly calibrate the system. Also note this is NOT the same as the legacy mode of operation. The ATS-6511 will not lock to the fiber input if the ATS-6501 has a 4372A Card and you are operating the ATS-6511 in the two-way_disabled fiber_mode.

2.6.3 One-Way Fiber Calibration

For system applications requiring the highest level of accuracy, the system should be calibrated at Symmetricom. This process involves installing the ATS-6501, user’s antenna and antenna cable, ATS-6511 and fiber optic cable(s) at the factory and comparing the PPS outputs to a system which has a known offset to UTC(USNO). Once the calibration is complete, the delay values are provided to the customer when the system is delivered. The PPS outputs will be accurate to the precise calibration levels specified in Appendix A as long as the user installs the antenna at a surveyed location. If a surveyed antenna location is not available, the ATS-6501 can be used to survey the location. Refer to the ATS-6501 manual for more information on installing the ATS6501 and antenna(s).

A coarse calibration of an ATS-6511 in a system is accomplished by accounting for the individual system delays and combining them to determine the overall delay of the system. This method is generally less accurate because the individual delays in the system are estimated and may not be entirely accurate. Refer to the ATS-6501 manual for more information on calculating the delay of the ATS-6501. Equation 2-1 gives the general formula for performing a coarse calibration of the cabling to the ATS-6511.

sec6511

f_Measure)per_unit_oefraction(Index_of_rFiber*Length_of_onds)_Delay(ATS_

Eq. 2-1

ATS-6511A/B/C Users Guide

DOC 6511_Release K

The Index_of_refraction refers to the velocity of the fiber optic signal as it travels through the fiber. This information can be obtained from the manufacturer of the fiber. It is typically specified as the delay value based on a unit of measure. Use the value provided and if needed convert the fiber optic cable length to the correct unit of measurement and calculate the delay as shown in Equation 2-1.

Once the ATS-6511 delay has been calculated, it must be entered into the system using the fiber_delay command. The example below is using a delay value of 118.5 ns for both fibers. Once the fiber delay value has been properly set use the save command to save the current delay to ensure the system uses the correct delay value after a reboot or power cycle. Users can verify the value was set properly by using the settings fiber:delay command and reviewing the settings.

ATS-6511>fiber_delay 1.185E-7 1.185E-7 OK [OK] 2010-05-27T19:29:58Z

ATS-6511>settings fiber:delay

[channelA] 1.185000000000000e-07 [channelB] 1.185000000000000e-07 [OK] 2013-08-13T18:03:24Z

Note: The new delay value will take effect immediately and could cause an alarm if the delay value forces the 1 PPS offset to be larger than 100 ns. The system will steer the internal clock to remove the fiber delay, if the alarm light came on it will go out once the 1 PPS Value returns to within 100 ns. The ATS-6511 outputs will now be accurate to the fine calibration accuracy specified in Appendix A.

2.6.4 Asymmetrical Fiber Paths To a ATS 6511 Input Channel

Two way mode can still be used in systems with asymmetrical transmit and receive fiber paths to a particular ATS 6511 input channel. The difference in delay between the two paths must be determined and entered into the ATS 6511 settings. The delay difference can be determined by using an optical TDR, or measuring the 1 PPS offset between the ATS 6501 and ATS 6511 using each of the fibers in two_way_disabled mode. When using the OTDR subtract the ATS 6511 to ATS 6501 transmit path delay from the ATS 6501 to ATS 6511 transmit delay path to obtain the fiber delay differential. Enter this number, including the sign, using the fiber_delay_diff command.

ATS-6511B> fiber_delay_diff <DELAYDIFFFIBERA DELAYDIFFFIBERB> (in seconds)

2.6.5 TSC-4340A

The 4340A fiber distribution amplifier may be used to distribute one fiber connection from the 4372A or 4372A-T to up to eight ATS 6511A/Bs. The 4340A works in any ATS 6511 fiber mode. Ensure you match fiber types when designing and installing a system which will include a 4340A. If using single mode 4372A or 4372A-T (default for both) ensure you are using a single mode 4340A (4340AS-8S for example). All of the systems are also capable of operating using multi-mode fiber by simply replacing the SM SFPs in the units.

Delay 1 = Delay 2 = Delay 3 =

Delay 4 =

DOC 6511_Release K

ATS-6511A/B/C Users Guide

NOTE: 4340As shipped after August 2011 will work with two way systems. If you have a 4340A shipped prior to August 2011, contact Symmetricom for information on upgrading the unit to work in two way systems.

2.7 Setting the System On Time Point (OTP)

The OTP of a system is defined as the point at which the timing signals coincide with UTC(USNO). Typical systems use distribution amplifiers and cabling to distribute timing signals from a single source to multiple users. This distribution network will delay the timing signals and affect their accuracy. For this reason it is important to select an appropriate OTP so that the desired timing signals are accurate when they reach the user.

Section 2.6 describes calibrating the ATS-6511 in both the two-way and one-way modes assuming that the OTP of the system is the rear panel of the ATS-6511. This is not generally a convenient location for the OTP of the system because there will be a delay associated with the distribution of the signals to the user. Figure 3 illustrates how to move the OTP of the system from the rear panel of the ATS-6511 to the user inputs. In moving the OTP of the system it is imperative that the distribution delays from the ATS-6511 to each of the users is equal. This will ensure that all users receive accurate timing signals.

ATS-6511 ATS-6501

OLD OTP

NEW OTP

PPS Output 1

PPS Output 2

PPS Output 3

PPS Output 4

Distribution_Delay

Delay 1

Delay 2

Delay 3

Delay 4

User 1

User 2

User 3

User 4

Figure 3 Timing System Diagram

Once the delay of the distribution network is known the OTP of the system can be shifted from the output of the ATS-6511 to the input of the user equipment. Use the dist_delay command to enter the delay value between the rear panel and desired OTP location as shown in Figure 3-2. Installing cables and distribution with the same delays will also ensure the 10 MHz signals are in phase, and the rising edge is aligned with the 1 PPS signals. The example below shows a delay of 50nSec.

ATS-6511>dist_delay 5.0E-8

[OK] 2013-08-13T18:04:40Z

Verify the system settings using the settings pps_adjust command.

ATS-6511A>settings pps_adjust

[distribution_delay] 5.000000000000000e-08 [OK] 2013-08-13T18:04:56Z

Port

DOC 6511_Release K

ATS-6511A/B/C Users Guide

If these settings are correct ensure you use the save command to save the system settings

2.8 Using an External Frequency Reference (ATS-6511B or C)

Users may decide to provide an EXTERNAL frequency reference to the ATS-6511B or C. The external frequency reference may be monitored by the ATS-6511B or C via a RS232 connection through either of the USB Connectors on the rear of the unit (ATS 94001-5071A). The Symmetricom 5071A is currently the only model supported; users should contact Symmetricom about the possibility of utilizing other clocks. The 5071A communications settings must be set to 9600 Baud, No Parity, 8 Data Bits, and 1 Stop Bit (9600,N,8,1) and a null modem serial cable will be required.

WARNING: Prior to setting the reference to external ensure the 10MHz signal from the reference is connected to the 10MHz IN connector on the rear of the ATS-6511B or C. If not, the ATS-6511B or C outputs will not be within specification and it could take up to several hours for the system to begin providing outputs within their specifications.

ATS-6511B -

MHz In

USB

Serial

MHz

Null Modem

Cable

1/2

RS-232

( DTE )

5071

External reference

Figure 4 External Frequency Reference

Current status can be determined using the status reference:frequency:external command.

ATS-6511Bs >status reference:frequency:external

[communications] bad 10MHz reference signal is present but the system is unable to

communicate with the 5071A

[communications] n/a 10MHz reference signal is present. The system will not attempt to

communicate with the external reference.

[locked] true 10MHz reference signal is present and the system is able to

communicate with the 5071A

[signal] missing 10MHz reference signal is not present. Do NOT select the reference

type as External.

Note: Make sure the USB-to-Serial Converter (ATS 94001-5071A) is installed on one of the two USB ports when the system is powered on. If not, power the system down, plug the cable in and re-apply power. The USB/Serial Cables are programmed to communicate with an external reference (ATS 94001-5071A) or to provide users access to the command port (ATS 94000-

115200). These cables are NOT interchangeable.

To set the type of reference use the reference_type command. If users are operating with a Symmetricom 5071A and they will set the system up so the ATS-6511B is communicating with the 5071A select hp5071A, if not select cesium.

ATS-6511B>reference_type hp5071a

[OK] 2013-08-13T18:05:30Z

ATS-6511A/B/C Users Guide

DOC 6511_Release K

Caution: If the system is unable to communicate with the external reference and the reference_type is hp5071A the Alarm light will come on and the Osc Lock light will go out and remain this way after you switch to the external reference. Make sure you select the proper reference_type before switching to external.

To set the reference to external use the reference command via the command port.

ATS-6511B>reference external

[OK] 2013-08-13T18:06:02Z

Note: The Alarm light will come on and the Osc Lock light will go out for a few seconds when you switch references. The system should clear all alarm indications within a few seconds.

To verify the settings use the settings reference command to check the current settings.

ATS-6511B>settings reference

[external] [type] hp5071a [source] ocxo [timescale] [OK] 2013-08-13T18:06:22Z

If these settings are correct type save to save the proper reference and reference type in the default user configuration file on the system to ensure the system starts up properly after a reboot or power cycle.

2.9 System Configuration Files (Syscfg)

The system is capable of allowing users to monitor and verify system configurations using the syscfg command. The files can be set up so critical system parameters can be checked against user defined nominal values and when the system settings do not match the nominal values the system provides a user defined alarm string to describe the configuration mismatch. This applies to any data set the system generates on Port 1900. Users can define the field and the nominal value. Users are cautioned that these values reported on Port 1900 are checked and must exactly match the value in the syscfg file. As an example, if you are operating in the dymanic positioning mode you would not want to set a nominal value for the altitude, latitude or longitude. You can however set the nominal value to “dynamic” for the positioning mode to alert you if someone places the unit in the incorrect positioning mode.

By default the system is operating in the “Standalone” mode and in this mode these parameters are not checked against the information provided on Port 1900. To enable this feature users will need to set the nominal values in the /mod/tsc/syslog/localcfg.py file. If no user specific parameters are set the system will use the factory default file /usr/tsc/syscfg/syscfg_default.py. Once the settings are entered users can turn this feature on using the syscfg command. See Appendix D for examples.

ATS-6511>syscfg --mode system Set Mode

[OK] 2013-09-05T23:53:17Z

DOC 6511_Release K

ATS-6511A/B/C Users Guide

Users can export the file using the --export option, download it via FTP, and edit the file in an editor of their choice. A Linux editor is recommended to prevent the Carriage Returns/Linefeeds from becoming and issue. Once the file has been edited users can upload the new file and then use the --import option to bring in the new file. Once successfully imported the system will load and begin using the imported file. See Appendix D for the detailed command information.

To check the status of this feature use the settings syscfg command.

ATS-6511>settings syscfg

[mode] system [OK] 2013-09-05T23:51:48Z

If configuration errors are detected the system will light the front panel alarm light and the alarms command will provide an indication of the error.

ATS-6511>alarm [alarm] syscfg -- Incorrect format in slot 6 port 2: expected=B, actual=H [OK] 2013-09-05T23:54:07Z

ATS-6511>alarms [syscfg] [occurrences] 1 [set] [what] Incorrect format in slot 6 port 2: expected=B, actual=H [when] 2013-09-05-23:53:16.800

[OK] 2013-09-05T23:55:35Z

To get a complete list of the configuration errors use the status syscfg:errors command.

ATS-6511>status syscfg:errors

[1] Incorrect format in slot 6 port 2: expected=B, actual=H [2] Incorrect signal word in slot 6 port 2: expected=120, actual=121 [OK] 2013-09-05T23:56:38Z

To stop using this feature use:

ATS-6511>syscfg --mode standalone Set Mode

[OK] 2013-09-05T23:53:17Z

Once the system has been set up for the correct mode use the save command to save the current system settings and the system will use these settings after a power cycle, restart, or reboot.

ATS-6511A/B/C Users Guide

DOC 6511_Release K

3 Operations

The ATS-6511 is used to extend the timing signals provided by the ATS-6501 over fiber optic cabling to accommodate transmission over long distance and improve signal integrity.

3.1 Front Panel

The ATS-6511 has several front panel indicators to provide the operator with the overall status of the unit and will provide a visual alarm indication if a problem with the hardware or the unit detects a condition that would cause the output signals to be outside of their timing specifications. More detailed status information can be retrieved using the status command on the Command Port.

Figure 5 ATS-6511 Front Panel

3.1.1 Power Supply Indicators

Each power supply has a front panel indicator that provides the operator an instant visual indication of the supply status. Power Supply #1 is on the left, power supply #2 is on the right as viewed from the front.

Indicator Status

Off No power is being provided to the ATS-6511. Green Power supply is good and is supplying power. Red ATS-6511 has power and the module has failed, is not seated properly, or is

unplugged from the power source.

Table 1

Power Supply Indicator

3.1.2 Alarm Indicator

The Alarm LED will turn red when the unit is not producing timing within their specifications or the system has suffered a major hardware failure.

Indicator Status

Off Unit has no current alarms. Green This indicator should only turn green during the front panel POST. Red Either power supply is missing/has failed or is without input power.

Any output module(s) is reporting a failure Outputs are not enabled (Power Up). Reference clock wander exceeded 100ns from fiber 1 PPS or input reference(s) are not present. The outputs are not locked to the reference input. Over temperature (internal temperature is greater than 65 C)

Table 2 Alarm Indicator

ATS-6511A/B/C Users Guide

DOC 6511_Release K

3.1.3 Oscillator Locked (Osc Lock) Indicator

The Oscillator Locked indicator on the ATS-6511 indicates the current status of the internal or external references. During system start up this light can take up to 5 minutes before it comes on.

Indicator Status

Off The internal OCXO is free running and cannot be steered to an input or the

reference inputs are missing.

Green The OCXO is being steered to the input indicated by the INPUT A/B LEDs, or

if they are both red to the internal Rubidium or External Reference (6511B only).

Red POST only.

Table 3 Oscillator Locked Indicator

3.1.4 Fiber A & B Indicators

The Fiber indicators on the ATS-6511 indicate the current status of the Fiber Inputs from the ATS-6501 reference(s).

Indicator Status

Off POST Only. Green Solid - Fiber input present, primary (master) input being used for steering.

Flashing – Fiber input is present, will switch to this secondary input if primary input is missing, unit is the Auto Switch Mode.

Red Solid - Fiber input not present or fiber mode setting is incorrect.

Flashing – Fiber input is present: unit in manual switching mode

Table 4 Fiber A and B Indicators

3.1.4 Outputs Enabled Indicator

This indicator provides the operator a visual indication regarding the output modules installed in the rear card slots on the unit. No user set up is required and the system will automatically configure the internal monitoring based on the card installed in each slot. To determine which module(s) is causing the alarm use the status health:output_modules command.

Indicator Status

Off Outputs not enabled Green Outputs are enabled. Red POST Only

Table 5 Outputs Enabled Indicator

3.1.5. Fans

Each two front panel fans is monitored by the ATS-6511. Any issues with the fans will be reported as an issue under the [health] status for the fans. Fan #1 is on the left and fan #2 is on the right. To check the status of the fans use the following commands on the command port.

ATS-6511>status hardware:fan

[1] true true indicates the fan is working [2] true false indicates the fan is off

+ 85 hidden pages

Symmetricom ATS-6511A, ATS-6511B, ATS-6511C User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual