Model 1093A/B/C GPS Satellite-Controlled Clock
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The Arbiter Systems®, Inc. Model 1093A/B/C GPS Satellite-Controlled Clock is a GPS timing source for applications which do not require the ultimate, 100 ns accuracy of our higher-performance models. The Model 1093A/B/C has 1 µs worst-case accuracy, to meet the requirements of a broad range of applications. The Model 1093A has two LEDs to monitor operating status. The Model 1093B adds an LCD setup/status display and a keyboard. The Model 1093C also includes a large (20 mm or 0.8 in.) LED time display. In all versions, twelve receiver channels provide optimum performance.
Two pluggable terminal strip outputs provide unmodulated IRIG-B and 1 PPS. A modulated IRIG-B output (1093opt92) is available on a third pluggable terminal strip output. These outputs have substantial drive capability to easily drive multiple loads in parallel. These outputs are configurable to provide other output signals or an event-capture input.
The GPS Data Backup Battery is now included in the Model 1093A/B/C. This feature improves acquisition time to as little as 15 seconds after a brief power loss by supplying constant power to the real-time clock and RAM in the GPS receiver module.
Other available option include Four Additional Configurable Outputs (1093opt03); High Drive IRIG-B Outputs (1093opt27); Power System Time, Frequency, and Phase Monitor (1093opt28); one Form C (SPDT) fail-safe, LOCKED relay (1093opt93) that is compatible with 129 Vdc digital fault recorder inputs; plus many more.
An event capture input is standard, and may be wired to one of the output connectors or used for synchronizing data collection on an external computer via the serial port. This input has 1 µs resolution. A programmable-pulse output may be used to generate an output pulse at the IRIG-B unmodulated or the 1 PPS outputs in addition to the AUX OUT on the RS-232 Port.
Standard power options include 85 to 264 Vac/110 to 275 Vdc, with either IEC-320 or terminal strip inlet, and 10 to 60 Vdc with terminal strip inlet. The terminal-strip versions have a surge-withstand network designed to meet ANSI/IEEE C37.90-1 and IEC801-4 specifications. Power configurations may be retrofitted in the field.
Also available, the Model 1092A/B/C GPS Satellite-Controlled Clock provides the same performance and functionality as the Model 1093A/B/C, but has a small, tabletop chassis and an external (wall-mount) power supply.
Model 1093A/B/C Specifications

Receiver Characteristics:
- Timing Accuracy:
- Specifications apply at the 1 PPS output, in the presence of Selective Availability (SA), as of date of publication.
- UTC/USNO: ±1 µs peak
- Position Accuracy:
- 25 meters, USA Department of Defense Selective Availability (SA) off.
- 100 meters, Selective Availability on.
- Altitude, 140 meters, Selective Availability on.
- All specifications rms, 95% confidence, with Position-Hold Mode off and receiving at least four satellites
- 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.
- Acquisition:
- 2 minutes typical, cold start
- 15 minutes, 90% confidence, cold start
- 40 seconds, 90% confidence, with almanac less than 1 month old
- 15 seconds, 90% confidence, with ephemeris less than 4 hours old
- The GPS Data Backup Battery is now included in the Model 1093A/B/C. This feature improves acquisition time to as little as 15 seconds after a brief power loss by supplying constant power to the real-time clock and RAM in the GPS receiver module.
I/O Configuration:
- 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 A Input:
- 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 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 to 600 seconds, except in one-shot mode, where the output is Low prior to the specified time and High thereafter.
- I/O Options:
- IRIG-B Modulated (1093opt92): bus driver, 4 Vpp, 20 ohms source impedance; drives a 50-ohm load at 3 Vpp; pluggable terminal strip
- Second RS-232 Port (1093opt19): Provides all the same capabilities as the standard RS-232C serial port except there is no AUX IN line. AUX OUT provides programmable pulse function at RS-232 levels.
- Relay contacts (1093opt93): 1 set, Form C (SPDT) fail-safe, 0.3 A at 130 Vdc; Locked function.
Interface:
- Operator:
- Display:
- Status LEDs (Models 1093A/B/C)
- 2 x 20 character supertwist LCD (Model 1093B/C)
- 14 mm (0.56 in.) LED; 9 digits (Model 1093C)
- Functions:
- Time: UTC or local
- Position: latitude, longitude, altitude
- Receiver and clock status
- 1 PPS (input) deviation
- Event time
- Status LEDs:
- Operate (green)
- Unlocked (red)
- Keypad: Eight keys; select display functions or setup menus (Model 1093B/C)
- Setup:
- 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 to 99 minute(s), 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
- System:
- RS-232: 1200 to 19,200 baud; 7 or 8 data bits; 1 or 2 stop bits; even/odd/no parity
- Interrogate mode
- 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
- RS-422/485 driver can also be fitted (1093opt94)
- Second RS-232 port available (1093opt19)
- Connector: Male 9-pin D-sub (TXD, RXD)
Certifications and Approvals
- CE mark/label and certificate:
Power Requirements:
- Standard:
- Voltage: 85 to 264 Vac, 47 to 440 Hz, 20 VA maximum or 110 to 275 Vdc, 15 W maximum
- Inlet: IEC-320 with fuse and mating cordset. Specify option P01 - P10
- Available cordset plug style and specifications are described in the Options and AccessoriesOptions and Accessories section
General:
- Physical:
- Size: 1 RU rack mount or tabletop, 260 mm deep FMS, Rack mounts included.
508 x 381 x 203 mm (20 x 15 x 8 in.), shipping - Weight: 2 kg (4.5 lbs), net
5.5 kg (12 lbs), shipping - Antenna:
- Mounting: 0.75 in. pipe (1 in. - 14 marine) thread
- Cable Connection: F-type
- Size: 77.5 dia. x 66.2 mm (3.05 x 2.61 in.)
- Weight: 170 grams (6.0 oz)
- Antenna Cable:
- Type: RG-6, 15 m (50 ft) provided
- Weight: 0.69 kg (1.52 lbs) per 15 m
- Environmental:
- Operating Temperature: 0° to +50° C (-20° to +70° C typical)
- Nonoperating Temperature: -40° to +75° C
- Humidity: Noncondensing
- EMC: Radiated susceptibility: passes walkie-talkie test. Conducted emissions: power supply complies with FCC 20780, Class A and VDE 0871/6.78 Class A. Surge withstand capability (SWC), power inlet: designed to meet ANSI/IEEE C37.90-1 and IEC 801-4
Options:
Except as noted otherwise, only one I/O Option may be installed. Available options are listed below and described in the Options and AccessoriesOptions and Accessories section.
I/O:
| Order Number: | Description |
|---|---|
| 1093opt03: | Four Additional Configurable Outputs [Modulated outputs also require Option 92.] |
| 1093opt19: | Second RS-232 Port [May be combined with other I/O options.] |
| 1093opt20A: | Four Configurable Fiber-Optic Outputs |
| 1093opt27: | Eight-Channel High-Drive IRIG-B Output [Modulated outputs also require Option 92.] |
| 1093opt28: | Power System Time, Frequency, and Phase Monitor |
| 1093opt29: | Four Additional Outputs with Dry Contact and +25/50 Vdc |
| 1093opt32: | Internal Network Time Protocol (NTP) Server |
| 1093opt92: | IRIG-B Modulated Output [May be combined with other I/O options.] |
| 1093opt93: | Out-of-Lock Relay, 1 Form C (SPDT) [May be combined with other I/O options.] |
| 1093opt94: | RS-422/485 half-duplex [May be combined with other I/O options.] |
| 1093opt95: | Four BNC Output Connectors (Parallel to Pluggable Terminal Strip) [May be combined with other I/O options.] |
| 1093opt96: | 1 PPS Output Reconfigured to Programmable Pulse [May be combined with other I/O options.] |
| 1093opt97: | IRIG-B Output Reconfigured to Programmable Pulse [May be combined with other I/O options.] |
| 1093opt98: | 1 PPS Output Reconfigured to Event Input [May be combined with other I/O options.] |
Power (select only one):
| Order Number: | Description |
|---|---|
| 1093opt07: | IEC-320 Power Inlet, 85 to 264 Vac, 110 to 275 Vdc |
| 1093opt08: | Terminal Power Strip, Surge Withstand, 10 to 60 Vdc |
| 1093opt10: | Terminal Power Strip, Surge Withstand, 85 to 264 VAc, 110 to 275 Vdc |
General:
| Order Number: | Description |
|---|---|
| 1093Aopt04: | On/Off Switch |
| 1093Bopt01: | LCD Backlight |
| 1093Bopt04: | On/Off Switch |
| 1093Copt01: | LCD Backlight |
Accessories:
Included:
| Order Number: | Description |
|---|---|
| AS0028200: | Rack Mount Kit |
| AS0035400: | 1093/1092 Operation Manual |
| AS0076200: | GPS Antenna, pipe mountable |
| CA0021315: | 15 m (50 ft) RG-6 Antenna Cable |
| P01-P10: | Power Cord Available cordset plug style and specifications are described in the Options/Accessories section. |
Available:
| Order Number: | Description |
|---|---|
| AS0033100: | Rack Slide Kit |
| AS0044600: | GPS Antenna Mounting Bracket |
| AS0044700: | 21 dB Pre-Amp, In Line - For use with cable lengths greater than 75 m (250 ft) |
| AS0044800: | RG-11 Crimp Tool + 25 F-type Connectors |
| AS0048900: | Antenna Grounding Block Kit |
| AS0049000: | GPS Surge Protector Kit |
| AS0062000: | High Interference GPS Antenna and Mounting Adapter Kit |
| CA0021315: | 15 m (50 ft) RG-6 Antenna Cable |
| CA0021330: | 30 m (100 ft) RG-6 Antenna Cable |
| CA0021345: | 45 m (150 ft) RG-6 Antenna Cable |
| CA0021360: | 60 m (200 ft) RG-6 Antenna Cable |
| CA0021375: | 75 m (250 ft) RG-6 Antenna Cable |
| TF0006400: | RG-6 Crimp Tool |
| WC0004900: | 300 m (1000 ft) Roll RG-11 Cable |


