Model 1083B GPS Satellite-Controlled Frequency Standard

The Arbiter Systems^®, Inc. Model 1083B GPS Satellite-Controlled Frequency Standard/Comparator delivers performance comparable to atomic frequency standards, but at a fraction of the price.

The outstanding long-term accuracy of the GPS system and the excellent short-term stability of Wenzel Streamline 10 MHz, third overtone SC-cut ovenized quartz oscillator combine to produce traceable, standard frequency outputs of 1 MHz, 5 MHz, and 10 MHz with outstanding spectral purity and long-term stability. These outputs are suitable for use as the frequency reference for counters and signal generators, or for multiplication to microwave frequencies. An output of one pulse per second (1 PPS) is also provided for time standard applications. The Model 1083B can also be equipped with a frequency measurement option (1083Bopt09) that allows the 1083B to measure the deviation and Allan Variance of a 1 MHz, 5 MHz, or 10 MHz signal and the deviation of a 1 PPS signal.

With the addition of a vacuum fluorescent display (VFD) and keyboard, the Model 1083B is ideal for both attended and unattended operation. All functions of the Model 1083B are available via the front panel and the serial interface. In addition to status and control information, the Model 1083B provides both UTC and local time, antenna position, and frequency deviation. Eight LEDs monitor operating status. The Model 1083B is equipped with an 85 to 264 Vac/110 to 275 Vdc power supply with an IEC-320 detachable cordset.

Additional 1 MHz, 5 MHz, and 10 MHz signals are available (up to eight total outputs), eliminating the need for a seperate distibution amplifier. For additional 1 PPS outputs, use the Arbiter Systems^®; Model 1073A Distribution Amplifier. The Model 1073A provides a total of up to 12 additional outputs.

The GPS Data Backup Battery is included in the Model 1083B. This feature improves acquisition time by supplying constant power to the real-time clock and RAM in the GPS receiver module.

Model 1083B 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: ±150 ns peak

Typical: < 40 ns rms, over 24 hours

Allan Variance:

After warmup; locked to GPS, including the effects of SA.

1 second: 5.0x10^-11

1 day: 5x10^-13

Oscillator:

Type: Wenzel Streamline 10 MHz, third-overtone SC-cut ovenized

Stability: 1 day: 1.0x10^-9; Over Temperature: 1.5x10^-8

Warmup: 6 hours

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 (referenced to WGS-84)

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
25 minutes, 90% confidence, cold start
30 seconds, 90% confidence, with ephemeris less than 4 hours old
66 seconds, 90% confidence, with almanac less than 1 month old
The GPS Data Backup Battery is included in the Model 1083B. 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:: Outputs: Four 50-ohm BNC; Three sine wave and one 1 PPS; Inputs: one 50-ohm BNC or High Impedance
Output Signals:: Sine wave: 1 MHz, 5 MHz, and 10 MHz, +11 dbm (2.5 Vpp) nominal into 50 ohms; 1 PPS: 5 V CMOS; 10 ohms source impedance; drive capability ±75 mA
Input Signals:: Sine wave: 1 MHz, 5 MHz, and 10 MHz; 1 PPS

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

Interface:

Operator:

Display: 2 x 20 character vacuum fluorescent

Functions:

Time: UTC or local
Position: latitude, longitude, altitude
Receiver and clock status
1 PPS (input) deviation

Status LEDs:

Operate (green)
Stabilized (green)
Unlocked (red)
Fault (red)

Input LEDs:

50 ohm (green)
1 PPS (green)
1 MHz (green)
5 MHz (green)
10 MHz indicated by illumination of the 1 MHz and 5 MHz LEDs

Keyboard: Eight keys

Setup:

Local time offset
Daylight Saving Time: On/Off/Automatic
Out-of-Lock time: 1 to 99 minutes, Off, or Zero Delay
Cable delay
Clock offset
Frequency/Time Measurement: 1 MHz, 5 MHz, 10 MHz, 1 PPS, Deviation/Allan Variance, Interval, Data Points, Termination
Auto-Survey: On/Off, Survey duration
Position Hold: Off/3D/Altitude
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:

Extended ASCII
ASCII with Time Quality
ASCII with Time Quality and Year
Vorne large-display time
Measurement Deviation

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

Options:

Options may be ordered in any combination except where noted otherwise. The available options are listed below and described in the Options and AccessoriesOptions and Accessories section.

I/O:

Order Number:	Description
1083Bopt09:	Frequency Measurement Capability
1083BoptxA:	1 MHz Sine Wave, BNC
1083BoptxB:	5 MHz Sine Wave, BNC
1083BoptxC:	10 MHz Sine Wave, BNC

The "x" denotes the output number, up to 8. Contact factory for TNC output connectors.

General:

Order Number:	Description
1083Bopt26:	Rack Slide Kit

Accessories:

Included:

Order Number:	Description
AS0028200:	Rack Mount Kit
AS0034100:	1083 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