Model 1092A/B/C GPS Satellite-Controlled Clock (500 ns)

Need value and performance in a desktop model? This precision time clock model brings economy and flexibility to environments that don’t need or use a rack mount system.

With two terminal strip outputs providing unmodulated IRIG-B and 1 PPS signals, the 1092A/B/C is capable of driving multiple loads in parallel.

Like other Arbiter clock models, various options are available to extend the functionality of the base model. Features supported include a second RS-232 port, an Out-of-Lock Relay Form C SPDT, an IRIG-B Modulated Output, and the reconfiguring of 1 PPS and IRIG-B Output to Programmable Pulse. The 1PPS Output may also be reconfigured to be an Event Input.

Adding value, each Model 1092A/B/C includes a Limited Lifetime Warranty to the original owner/purchaser, a wall mount power supply, a GPS Antenna with a 15 meter antenna cable, and an operations manual. Avoid the extra charges other company’s tack onto their clocks!

Model 1092A/B/C is available with three front panel configurations. See photos and Key Features tab for more information.


Receiver Characteristics

Timing Accuracy

Accuracy Note Specifications apply at the 1 PPS output, in the presence of Selective Availability (SA), as of date of publication.
Accuracy UTC/USNO ± 500 ns peak

Satellite Tracking

Twelve (12) channel, C/A code (1575.42 MHz). Receiver simultaneously tracks up to twelve satellites. Results from all tracked satellites are averaged in Position-Hold Mode or, with Position-Hold Mode off, using least-squares estimation.


  • 150 seconds typical, cold start
  • 15 minutes, 90 % confidence, cold start
  • 40 seconds, with almanac less than 1 month old
  • 15 seconds, with ephemeris less than 4 hours old
  • The GPS Data Backup Battery is included in all Model 1092s. This feature improves acquisition time by supplying constant power to the real-time clock and RAM in the GPS receiver module.

I/O Configuration

Output Connectors

Two standard: one IRIG-B Unmodulated and one 1 PPS; Type: bus driver, 5 V CMOS; 10 ohms source impedance; ± 75 mA drive capability; pluggable terminal strip.
Open-drain FET drivers (400 V, 220 mA, 1 W power dissipation) can also be fitted; contact factory.

Event Inputs

One event timer channel with 1 µs resolution is standard. This function may be driven by the start bit of a received character on the serial port, or (by internal connection) an external 5 V CMOS/TTL signal at one of the terminal strip connectors.

Programmable Pulse Output

One programmable output pulse (by a jumper connection) that may be output on a terminal strip connector or the AUX OUT pin on either RS-232 Port.
Four modes:

  • Every 1 second to 60,000 seconds, starts top of the minute
  • Hourly at a specified offset
  • Daily at a specified time of day
  • One shot at a specified time of year

Pulse duration is programmable from 0.01 seconds to 600 seconds, except in one-shot mode, where the output is Low prior to the specified time and High thereafter.



  • Status LEDs (Models 1092A/B/C)
  • 2 character x 20 character supertwist LCD (Model 1092B)
  • 14 mm (0.56 in) LED; 9 digits (Model 1092C)
  • Time: UTC or local
  • Position: latitude, longitude, altitude
  • Receiver and clock status
  • 1 PPS (input) deviation
  • Event time
Status LEDs
  • Operate (green)
  • Unlocked (red)
Keyboard Eight keys; select display functions or setup menus (Model 1092B)
  • Local time offset
  • Output code select: Local/UTC
  • Daylight Saving Time (Set Summer Time): Off/On/Auto USA/Auto EUR/Auto CUS
  • Backlight control: On/Off/Auto
  • Event input: Event/1 PPS
  • Programmable Pulse setup
  • Antenna delay
  • Out of lock time: 1 minute to 99 minutes, Off, or Zero Delay
  • Auto-Survey: On/Off, Survey duration
  • Position Hold: On/Off, Position Auto/Manual
  • Option Configuration and Setup
  • Serial port: RS-232


RS-232 1200 baud to 19,200 baud; 7 or 8 data bits; 1 or 2 stop bits; even/odd/no parity

Second RS-232 port available (1092opt19)
Connector: Male 9-pin D-sub (TXD, RXD)

RS-422/485 Optional driver can also be fitted (1092opt94)
Broadcast modes
  • Standard ASCII (IRIG-J)
  • Extended ASCII
  • ASCII with Time Quality
  • ASCII with Time Quality and Year
  • Vorne large-display time
  • Status/Alarm
  • Event data
Connector Male 9-pin D-sub (TXD, RXD, AUX IN, AUX OUT)
AUX OUT can provide programmable pulse function at RS-232 levels

Power Requirements


Wall mount plug-in transformer: 9 Vdc/500 mA, 120 Vrms, 60 Hz UL/CSA; Contact factory for other voltages (input accepts 9 Vdc to 15 Vdc)



Size 43 mm H x 218 mm W x 257 mm deep, 1 RU with Rack Mount kit, AS0044500.
508 mm x 381 mm x 203 mm (20 in x 15 in x 8 in), shipping
Weight 1.4 kg (3 lbs), net
5.5 kg (12 lbs), shipping
  • Cable Connection: F-type
  • Mounting: 0.75 in pipe (1 in – 14 marine) thread
  • Size: 80 mm hex (across flats) x 84 mm tall (3.2 in x 3.3 in), including connector
  • Weight: 170 g (6 oz)
Antenna Cable Type: RG-6, 15 m (50 ft) provided
Weight: 0.69 kg (1.52 lbs) per 15 m


Temperature Operating: 0 °C to + 50 °C (- 20 °C to + 70 °C typical)
Nonoperating: – 40 °C to + 75 °C
Humidity Noncondensing
EMC Radiated susceptibility: passes walkie-talkie test.

Certificates and Approvals

CE mark/label and certificate