Model 1088B GPS Satellite-Controlled Clock
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The Arbiter Systems®, Inc. Model 1088B GPS Satellite-Controlled Clock provides unprecedented flexibility, performance, and value for worldwide timing applications. Combining GPS accuracy and ease of use with exceptionally flexible interface features and options in a space-saving package, the Model 1088B offers unparalleled value in GPS-synchronized clocks.
Flexibility
Offering standard operation from worldwide AC power sources, plus 110 to 370 volt DC sources (also standard), the Model 1088B integrates into most environments with no options required. Optional power configurations include terminal-strip power inlet (1088opt07), surge-withstand capability (1088opt15), and 10 to 60 Vdc operation (1088opt08).
Standard user-configurable input/output (I/O) capabilities provide over 260,000 possible configurations, with 22 available signals, in the standard unit alone. With the addition of the available options, trillions of combinations are possible!
The available I/O options add a wide variety of capabilities to the Model 1088B. Additional outputs are available in a variety of formats, including fiber optic. High-performance internal oscillators are also available.
With Option 28, the Model 1088B is a Power System Time, Frequency, and Phase Monitor with state-of-the-art accuracy.
Performance
The Model 1088B offers full-specified GPS timing accuracy of 100 ns rms from UTC/USNO. Typical performance is less than 40 ns rms. The Model 1088B provides this performance 24 hours a day, anywhere in the world.
Value
The Model 1088B Satellite-Controlled Clock was designed from the beginning to offer the greatest possible flexibility and value for a wide range of applications. See what we mean - compare the unmatched flexibility, performance, and value - put the Model 1088B to work in your system today!
Related Products
If your application does not require the outstanding flexibility and configurability of the Model 1088B, consider Models 1084A/B/C, 1092A/B/C and 1093A/B/C. All offer significant cost savings and many of the most-needed features of the Model 1088B.
Redundant configurations are available for applications that require even more resistance to loss of GPS synchronization. The redundant configuration consists of two clocks with clock-to-clock communications and an interconnect arbiter.
Model 1088B 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: ±50 ns rms, when receiving 4 or more satellites and Position-Hold Mode on
- UTC/USNO: ±100 ns rms, receiving a single satellite and Position-Hold Mode on
- UTC/USNO: ±200 ns rms, when receiving 4 or more satellites and Position-Hold Mode off
- Synchronization:
-
- CMOS output signals are synchronized to the 1 PPS output, ±50 ns maximum.
- IRIG-B modulated, ±1 µs, maximum
- The leading edge of the start bit of a received RS-232 data message may be selected to trigger the Event A input, providing synchronization with 100 ns resolution.
- Position Accuracy:
- 10 meters, rms, 90% confidence
- 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:
- 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 the Model 1088B. This feature improves acquisition time by supplying constant power to the real-time clock and RAM in the GPS receiver module.
I/O Configuration:
- Connectors:
- Four, BNC, user-configurable. Each connector is configururable as a specific input function or as any one of 22 output functions, listed below, by means of internal, push-on jumpers. Each output connector is independently buffered. Configuration may be changed easily in the field. Refer to the options section for more outputs.
- Analog outputs are op-amp (LF353) followers with 560-ohm protective resistors.
- CMOS outputs are buffer type (74HC126) with 47-ohm source resistors.
- Input Functions:
- Channel A: Event or 1 PPS: 5 V TTL/CMOS level
- Channel B: Event or 1 PPS: 5 V TTL/CMOS level
- Frequency Reference: 5 V TTL/CMOS or AC-coupled; 100 kHz, 1 MHz, 5 MHz, or 10 MHz
- Output Functions:
- Analog:
- IRIG-B, 1 kHz modulated, 10 Vp-p
- 1 PPS deviation; ±5 V at 10 µs/V
- 5 V CMOS:
- IRIG-B, E, D, or H, level-shift
- 1 PPS, 1 PPM, 1 PPH
- 1, 10, 50, 60, or 100 PPS
- 1k, 10k, or 100k PPS
- 1M, 5M, or 10M PPS
- Locked
- Programmable Pulse
- IRIG-B Modified Manchester (IEEE Standard 1344)
- Event A/B Inputs:
- Two inputs are available, each having a 100 ns timing resolution. Each input may be configured to accept an external 1 PPS signal, and measure the deviation from 1 PPS/GPS or to record up to 300 sequential events (separated by 11 ms). Event data is logged in battery-backed RAM and may be read or cleared from the front panel or RS-232 interface.
- Programmable Pulse Output:
- 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.
Interface:
- Operator:
- Display:
- 2 x 20 character supertwist LCD
- Functions:
- Time: UTC or local
- Position: latitude, longitude, altitude
- Receiver and clock status
- 1 PPS (input) deviation
- Event time
- Status LEDs:
- Operate (green)
- On Line (green)
- Unlocked (red)
- Fault (red)
- Battery Charge (green)
- Battery in Use (green)
- Battery Low (red)
- Keyboard:
- Eight keys
- Setup:
- Local time offset
- Output code select: Local/UTC
- Daylight Saving Time: On/Off/Automatic
- Backlight control: On/Off/Automatic
- Event input: Event/1 PPS, for each input A and B
- Programmable Pulse setup
- Antenna delay
- Clock offset
- Out-of-Lock time: 1 to 99 minutes, Off, or Zero Delay
- Auto-Survey: On/Off, Survey duration
- Position Hold: On/Off, Position Auto/Manual
- Option Configuration and Setup
- Recorder output A/B
- Frequency Reference: standard (internal) or external
- Serial port: RS-232
System:
- 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)
- Second RS-232 port available (1088opt17A)
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 370 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/Accessories section
- 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:
- 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:
- RG-6 type
- 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:
There are two internal option slots in the Model 1088B and options fit into two categories: those that require internal option slot space, and those that do not. Only one option may occupy the individual Option Slots. Available options are listed below and described in the Options and Accessories section.
I/O:
| Order Number: | Description |
|---|---|
| 1088opt03: | Four Additional Configurable Outputs [Slot A] |
| 1088opt04: | Parallel BCD Output 1 ms Resolution [Slot B] |
| 1088opt17: | BCD with Second RS-232 Port [Slot B] |
| 1088opt17A: | Second RS-232 Port [Slot B] |
| 1088opt18: | Self-Monitor IRIG-B Distribution System and Second RS-232 Port [Slot B] |
| 1088opt19: | Out-of-Lock Relay, 1 Form C (SPDT) [Slot B] |
| 1088opt20A: | Four Configurable Fiber-Optic Outputs [Slot A or Slot B] |
| 1088opt23: | COMTRADE Sample Rate Generator [Slot A or Slot B] |
| 1088opt27: | Eight-Channel High-Drive IRIG-B Output [Slot B] |
| 1088opt28: | Power System Time, Frequency, and Phase Monitor [Slot A] |
| 1088opt29: | Four Additional Outputs with Dry Contact and +25/50 Vdc [Slot B] |
| 1088opt32: | Internal Network Time Protocol (NTP) Server [Slot B] |
| 1088opt33: | Dual Internal Network Time Protocol (NTP) Server [Slot B] |
Power (select only one):
| Order Number: | Description |
|---|---|
| 1088opt07: | Terminal Power Strip, 85 to 264 Vac, 110 to 350 Vdc |
| 1088opt08: | Terminal Power Strip, 10 to 60 Vdc |
| 1088opt15A: | Surge Withstand and Terminal Strip 110 to 170 Vdc |
| 1088opt15B: | Surge Withstand and Terminal Strip 110 to 300 Vdc |
Oscillator and Timing:
| Order Number: | Description |
|---|---|
| 1088opt12: | OCXO and Four Additional Configurable Outputs [Slot A] |
General:
| Order Number: | Description |
|---|---|
| 1088opt01: | LCD Backlight |
Accessories:
Included:
| Order Number: | Description |
|---|---|
| AS0028200: | Rack Mount Kit |
| AS0029900: | 1088B 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 |
| CA0021302: | 2 m (6 ft) RG-6 Antenna Cable |
| CA0021306: | 6 m (20 ft) RG-6 Antenna Cable |
| 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 |