Symmetricom ATS-6511A User manual

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

configuration not readable

alarm

Changed to

status

reference:frequency:external

04/18/2012

WF

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).

02/18/2013

WF

J

Removed clock_freq_step

and clock_phase_step from

table 6

Added RMS to jitter spec.

04/22/13 GAR

K

Updated for Tflex 5.x

commands

Firewall settings/command.

8/13/13 RRW

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Table of Contents

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

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

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

2 Installation ............................................................................................................ 3

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

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

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

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

2.2.2.1 Network ..................................................................................................... 4

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

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

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

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

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

2.4 ATS-6511 Modules .............................................................................................. 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 Fiber Optic Input Behavior ................................................................................ 14

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

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

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

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

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

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

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

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

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

3.4.3.5 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

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

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

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

5 Maintenance ....................................................................................................... 46

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

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

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

6. 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

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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

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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.

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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.

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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 ATS-

6511 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.

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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 “ATS-

6511>” 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).

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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> ………..

Once timed out, the connection will drop.

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

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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 ATS-

6511> 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.

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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.

Figure 2 Single Slot 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]

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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 µs 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 µs, 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

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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]

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[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)

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: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)

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: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

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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

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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:

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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

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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 33

rd

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

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