Arbiter Systems 120A User Manual Download Page 3

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Model 120A

GNSS Synchronized Clock

Operation Manual

Chapter 1

General

Chapter 2

Specifications

Chapter 3

Physical Configuration

Chapter 4

Operation

Chapter 5

Instrument Configuration

Chapter 6

Firmware Updates

Appendix A

IRIG-B Time code

Appendix B

Serial Communications and Command Set

Appendix C

GPS Antenna Placement

Publication number: PD0058200A

Reorder number: AS011700

Summary of Contents for 120A

Page 1: ...MODEL 120A GNSS SYNCHRONIZED CLOCK USER MANUAL ARBITER SYSTEMS INC PASO ROBLES CA 93446 U S A WWW ARBITER COM ...

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Page 3: ... Operation Chapter 5 Instrument Configuration Chapter 6 Firmware Updates Appendix A IRIG B Time code Appendix B Serial Communications and Command Set Appendix C GPS Antenna Placement Copyright Arbiter Systems Incorporated August 2021 All rights reserved International copyright secured Publication number PD0058200A Reorder number AS011700 ...

Page 4: ...Check with Arbiter Systems at the address below for any revisions made since the original date of publication Contact Information Arbiter Systems Inc 1324 Vendels Circle Suite 121 Paso Robles CA 93446 805 237 3831 www arbiter com techsupport arbiter com sales arbiter com What This Manual Covers This manual describes the set up and operation of the Model 120A series GNSS synchronized clocks ...

Page 5: ...OF LAW OR OTHERWISE ARBITER SYSTEMS DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE AND BUYER EXPRESSLY WAIVES ALL OTHER WARRANTIES This limited warranty does not extend to any product which has been subject to 1 Improper use or application abuse or operation beyond its rated capacity or contrary to the instructions in the operation and maintenance manuals if any 2 Ac...

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Page 7: ...to 100 mm Wires AP0003400 11 1 3 3 BNC Female Breakout to 100 mm Wires AP0008900 11 1 3 4 BNC Female Breakout to Screw Terminals AP0014900 11 1 3 5 BNC Male Breakout to Screw Terminals AP0015000 11 2 Specifications 12 2 1 Receiver Characteristics 12 2 1 1 Input Signal 12 2 1 2 Time Accuracy 12 2 1 3 Satellite Tracking 12 2 1 4 Acquisition 12 2 1 5 Antenna 12 2 1 6 Antenna Cable 12 2 2 Interface 12...

Page 8: ...4 2 1 GNSS 18 4 2 2 Local Offset 18 4 2 3 DST 18 4 2 4 Outputs 18 4 2 5 SPST Relay Contact 19 4 2 6 Serial Port 20 4 2 7 Downloading a Configuration File 20 4 2 8 Uploading a Configuration File 20 5 Operation 21 5 1 Startup 21 5 2 Reset 21 5 3 Faults 22 6 Firmware Updates 23 6 1 Requirements 23 6 2 Procedure 23 6 3 Verifying 23 7 Appendix 24 7 1 IRIG B Timecode 24 7 1 1 IRIG B IEEE C37 118 1 24 7 ...

Page 9: ...7 5 Glossary 34 7 6 Drawings 35 ...

Page 10: ...ronized Clock Instrument comes with 1 four position and 4 two position pluggable terminal strip connectors installed and flange mounts attached 1 2 2 Antenna Assembly AP015700 An active low profile weatherproof GPS patch antenna is included Designed for bulkhead mounting the antenna requires 2 5 to 5 5 Vdc on the TNC connector for power 1 2 3 Antenna Cable Assembly CA0034700 A 5 meter 16 foot RG 1...

Page 11: ...3400 Transitions two wires to a male BNC connection 1 3 3 BNC Female Breakout to 100 mm Wires AP0008900 Transitions two wires to a female BNC connection 1 3 4 BNC Female Breakout to Screw Terminals AP0014900 Transitions wires to a female BNC connection via screw terminals 1 3 5 BNC Male Breakout to Screw Terminals AP0015000 Transitions wires to a male BNC connection via screw terminals ...

Page 12: ...RG 174 U 5 m 16 feet included Terminated with TNC and F Type connectors 2 2 Interface The Model 120A interface consists of a F Type antenna connector 4 LED annunciators and a twelve position pluggable 5 mm terminal strip on one panel with a micro USB connector data LED and a recessed reset button on the opposite panel Figure 2 1 Model 120A End Panels 2 2 1 Antenna Input The antenna input is a F ty...

Page 13: ...sions DCF77 Pulse Per Day PPD Pulse Per Hour PPH Pulse Per Second PPS 2 2 5 Relay Form A SPST N 400 V peak ac dc 20 40 ohms on resistance Signal Out of Lock Fault PPM PPH PPD ST Fail Safe In Unlocked Fault state power off contacts are open 2 2 6 Reset Function There is a recessed reset button on right of panel with USB port and LED The reset button has two functions 1 Restart the Model 120A Press ...

Page 14: ... Time Off 2 3 General 2 3 1 Power Requirements Input accepts 8 to 32 Vdc and is not isolated negative terminal is connected to chassis ground 2 3 2 Dimensions Chassis 110 x 85 x 30 mm 4 3 x 3 4 x 1 2 inch Chassis with mounting brackets 140 x 85 x 30 mm 5 5 x 3 4 x 1 2 inch 2 3 3 Weight 0 45 kg 1 lb 2 3 4 Temperature 40 C to 85 C ...

Page 15: ...ill operate over a 40 C to 85 C temperature range The small size allows for the unit to fit in small spaces The case is not waterproof so it must be kept in a weather protected location 3 1 1 Instrument Mounting The Model 120A comes with two removable flanges with slots that can be used to secure the unit to a panel or shelf 3 1 2 Power Requirements The Model 120A accepts a dc input voltage betwee...

Page 16: ... inch The antenna can be mounted in an alternate location and comes standard with a five meter 16 feet antenna cable 3 2 3 Antenna Mounting Position the antenna to have a clear view of the sky in all directions of the compass for best satellite tracking 1 Place the gasket onto the antenna 2 Pass the antenna base through the 23 mm 7 8 inch hole in the top of the cabinet 3 Spin the plastic base nut ...

Page 17: ...r each user 1 Admin Config Ultimate user role with no restrictions has all available commands add audit broadcast delete dst firmware gnss localoffset logout ool output password position readconfig relay serial status time timeout users whoami writeconfig and 2 Admin Administration role limited to configuring user related settings with the following commands add audit delete firmware logout passwo...

Page 18: ...ck the satellite constellation to track and get timing information from The Model 120A can receive GPS Galileo GLONASS and Beidou signals and can actively track up to 3 systems at a time The Model 120A cannot receive both GLONASS and BeiDou simultaneously 4 2 2 Local Offset Local Offset allows the user to set a local time zone and is entered in times from UTC time For example Pacific Standard Time...

Page 19: ... Second PPS The one pulse per second output is a pulse transmitted at the start of every second with a 10 ms pulse width The rising edge is the on time mark of the signal 4 2 5 SPST Relay Contact A Form A SPST solid state relay provides contact closure for several clock conditions and programmable pulse modes The contacts are normally open NO Normally refers to the relay condition when the clock i...

Page 20: ... current configuration can be downloaded to a binary file using the serial command readconfig Sending the readconfig command will initiate an X modem transfer and the Model 120A will wait for an X modem handshake to start sending the file when ready The user must use a terminal program capable of an X modem transfer to receive the file A successful process will look like read Start binary file tra...

Page 21: ...0 0 N A SN O 0 0 0 N A Not Yet Locked Time Quality Time Local 00 00 0000 00 00 00 Time UTC 00 00 0000 00 00 00 Which will progress to status Receiver Version SW ROM CORE 3 01 107888 HW 00080000 GNSS GPS GLONASS Galileo BEIDOU Tracked 8 7 5 N A SN O 40 31 37 N A Locked Time Quality 100nS Time Local 05 06 2020 16 27 58 Time UTC 05 06 2020 23 27 58 DST auto 7 00 5 2 Reset A recessed RESET button is l...

Page 22: ...r repair while the external errors can be fixed in the field System Error s Internal BootLoaderMissing Boot loader missing indicates issues with loading firmware at startup VCXO PLL Timing loop problems GnssNotDetected GNSS receiver error SPI EEPROM Internal EEPROM error SPI Flash not detected Internal Flash error SPI Flash error Internal Flash ready error External Antenna short The 120A antenna o...

Page 23: ...privileges Verify the firmware version installed by sending the firmware command Send the command firmware update wait for the prompt Start binary file transfer Xmodem send Select and send the firmware file using the Xmodem transfer of the terminal program When the firmware has been updated you will get a Success notification press enter to get the login screen The sequence will look like this fir...

Page 24: ...omponents of the IRIG B time code Figure 7 1 illustrates the primary differences between modulated and unmodulated IRIG B You will notice that the while modulated IRIG B is distinctive because of the 1 kHz sinewave carrier it is similar to unmodulated IRIG B since the peak to peak values of the carrier follow the same form as the peaks of the digital waveform which contain the information Note tha...

Page 25: ...ss make a serial connection using a terminal program with the following default settings Baud Rate 115200 Data Bits 8 Stop Bits 1 Parity N Default Username Administrator Default Password P4ssw_rd Administration Commands Admin Function Command Action Response List Users users Returns current list and roles of users Add User add username password role pw_perm Where username Min 8 char alphanumeric s...

Page 26: ...s returned Update Firmware firmware update Start binary file transfer Xmodem send Requires Admin Config privileges Show Audit Log History audit Displays log of system and user events in the following format Event User Description Download Configuration read config Start binary file transfer Xmodem receive Upload Configuration write config Start binary file transfer Xmodem send Exit Interface logou...

Page 27: ...5 2nd from last 6 3rd from last day Monday Sunday HH MM Change over time hours minutes Set Local Time Zone localoffset HH MM Where HH MM is local time offset from UTC Set Out Of Lock ool min Where min 0 99 minutes 0 off Set Out 1 and Out 2 Output Signals out put 1 2 IRIG IRIGC37 DCF77 PPD UTC local LD HD out put 1 2 PPH LD HD out put 1 2 PPS 1 999 LD HD out put 1 2 delay delay 0 10000nS Where 1 2 ...

Page 28: ...ST requires setting the date and time Set Serial Port ser ial baud length stop parity Where baud 1200 115200 length 7 or 8 stop 1 or 2 parity N E or O Select Serial Broadcast br oadcast B UTC local Where B Broadcast number 0 Off 1 ASCII Std 2 Vorne Std 5 Ext ASCII 6 ASCII Qual 7 Year ASCII 8 Custom 9 NEMA GPGLL 10 NEMA GPZDA Set Custom Broadcast String br oadcast custom string Where string is the ...

Page 29: ...nistrator Show Programmable Pulse Setting out put Displays the current output configuration Example OUT Mode Time Drive Delay 1 IRIGB C37 118 on UTC LD 0 2 IRIGB C37 118 on UTC LD 0 Show Out of Lock Setting ool Displays current out of lock setting in minutes Example Out of lock 1 min Show Local Offset localoffset Displays time zone setting in hours minutes Example Local Offset 8 00 Show Firmware V...

Page 30: ...rt Setting ser ial Displays the serial port settings Example serial 115200 8 1 N Show Serial Broadcast Setting br oadcast Displays the broadcast mode Example broadcast ASCII Std 1 UTC Show Custom Broadcast String br oadcast custom Displays the current custom broadcast string ...

Page 31: ...Pi Latitude where i 1 degrees dd 2 Minutes mm 3 Fractional minutes mmmm 4 Seconds ss 5 Fractional seconds fff 6 N North or S South pi Longitude where i 1 degrees ddd 2 minutes mm 3 fractional minutes 4 seconds ss 5 fractional seconds fff 6 E East or W West r Carriage return and line feed CR LF Sii String Type where ii 01 Status change 02 Vorne Opt28 03 Opt28 ASCII 04 True Time Opt28 s Seconds 00 5...

Page 32: ...5 Error 100 microseconds 63 Error 100 microseconds Table 7 3 List of True Time Quality Levels Ordinal 02 Using Ordinals and Conditionals An ordinal returns an ASCII character or characters e g 1 2 3 good bad etc for a requested value e g clock accuracy A conditional returns an ASCII character or characters e g 0 1 locked unlocked etc based on a true false request e g Is there a Fault Illustrated b...

Page 33: ...01 d h m s r Input String Construction Notes The method of starting the ASCII Standard broadcast is using the br 8 UTC or br 8 local command Custom string entry always begins with the br custom The T01 specifies the on time character as a Hex 01 which is the Start of Header Notice that these characters are preceded by the which precedes each of the other Table 7 1 characters d is for Julian Day h ...

Page 34: ...ssary Broadcast Serial data sent out over the serial port once per second DST Day Savings Time the GNSS Global Navigation Satellite System is is a general term describing any satellite constellation that provides positioning navigation and timing PNT services on a global or regional basis Including GPS BeiDou Galileo and GLONASS BeiDou is a global GNSS owned and operated by the People s Republic o...

Page 35: ...7 6 Clock Drawings ...

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