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GS5891 Mobile GPS Timing Device
Products Introduction
The GS5891 GPS timing device is a compact, portable unit designed as a support instrument to provide users with precise UTC (Coordinated Universal Time) or TAI (International Atomic Time), while also offering signal detection capabilities.
The mobile timing device synchronizes its internal time with an external reference-either GNSS signals or a standard time code from a central time reference-and then distributes high-precision UTC or TAI time to other equipment via its timing output unit.
It can accept any of the following as a reference source for disciplining its internal rubidium atomic clock: external GNSS signals, IRIG-B(DC) code, or 1PPS + serial UTC/TAI time code. In addition, the device can test and calibrate the 1PPS signals of external equipment.
Application areas
Signal detection, frequency calibration, and time calibration for field timing equipment;
Time and frequency calibration for the firing range.
Time synchronization for base stations, control stations, monitoring stations, etc.
Features
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Its compact and portable design makes it easy to carry in the field;
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A dual backup design of rubidium clock + crystal oscillator. The rubidium clock serves as the master clock source, while the crystal oscillator is the backup. When the rubidium clock fails, it immediately switches to the backup crystal oscillator for timekeeping without affecting the signal output, ensuring high reliability;
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Provides UTC or TAI time to external users (selectable output);
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It has an internal GNSS satellite wireless signal receiving function, and the default priority is GPS;
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The device accepts B(DC) or 1PPS+serial UTC/TAI time code from a central timing station or mobile timing device for time synchronization.
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Once synchronized, it automatically begins outputting timing signals;
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When GNSS signals are available, the 1PPS timing output can be used to calibrate the frequency of the internal timekeeping clock.;
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The timekeeping accuracy is better than 10ms/year under uninterrupted power supply conditions;
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Equipped with battery power supply capability. The battery is rated for a minimum of 200 charge/discharge cycles or a minimum shelf life of 2 years;
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Equipped with portable mobile timing functionality, the device provides a holdover duration exceeding 5 hours. The rubidium clock delivers holdover accuracy better than 10µs over 5 hours, while the backup crystal oscillator ensures holdover accuracy better than 70µs over the same 5-hour period;
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It features displays for clock setting, synchronization, time measurement, number of visible satellites, and battery life;
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Meets vehicle-mounted military environmental requirements;
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The cold start stabilization time is less than 30 minutes.
Technical Indicators
|
Item |
Input/Output |
Indicator Item |
Index |
|
1 |
Input signal |
BeiDou satellite signals |
Number of channels/physical interfaces: 1 channel/TNC; Receiving frequencies: BeiDou: B3 band, C code; GPS: L1 band/A code; 1PPS timing accuracy: <100ns (1σ). |
|
B (DC) code signal input |
Number of channels/physical interfaces: 1 channel/aviation plug; Electrical interface: Electrically isolated RS422; Encoding format: Conforms to GB General Specification for Time Code Interface Terminals; UTC time information includes year, day, hour, minute, and second. Signal jitter: < 200ns |
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|
Time code signal input |
Number of channels/physical interfaces: 1 channel 1 PPS second signal, 1 channel serial UTFC /TAI time information, and a aviation connector; 1PPS signal pulse width: 2ms ± 100us; Rise time per second (PPS): ≤100ns; 1PPS signal jitter: ≤100ns; 1PPS + serial UTTC /TAI time code signal level: RS422; UTC time information includes year, day, hour, minute, and second. |
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|
2 |
Output signal |
B (DC) code signal output |
Number of channels/physical interfaces: 1 channel/aviation plug; Electrical interface: Electrically isolated RS422; Encoding format: Conforms to GB General Specification for Time Code Interface Terminals; UTC/TAI time information includes year, day, hour, minute, and second. Signal jitter: < 200ns |
|
Time code signal output |
Number of channels/physical interfaces: 1 channel 1PPS second signal, 1 channel serial UTFC /TAI time information, and a aviation connector; 1PPS signal pulse width: 2ms±100us; Rise time per second (PPS): ≤20ns; 1PPS signal jitter: ≤1ns(STD); Timing accuracy: ≤100ns(RMS ); 1PPS + serial UTTC /TAI time code signal level: RS422; UTC/TAI time information includes year, day, hour, minute, and second. |
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|
Status monitoring port |
Number of channels/physical interfaces: 1 channel/aviation plug; 10M/100M adaptive; The internal status information of the equipment is reported in real time. |
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Local 1PPS output |
Number of channels/physical interfaces: 1 channel/TNC; Output level: CMOS |
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Rubidium clock 10MHz output |
Number of channels/physical interfaces: 1 channel/TNC; Output waveform: sine wave; Output amplitude: 0.5V(RMS); Impedance: 50Ω±10Ω |
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|
3 |
Internal clock source performance |
Preheating lock time |
Frequency accuracy over 10 minutes at room temperature: ≤3E-10 |
|
Frequency accuracy |
≤3E-10 (Heat for 20 minutes within the temperature range of 0℃ to +50℃) |
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|
Frequency stability |
Short-term stability: <2E-11/1s; Long-term stability: <1E-12/1d |
Physical and Environmental Parameters
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Dimensions: Portable and miniaturized design 320mm×100mm×180mm (length×width×height, tolerance±2 mm) |
Weight: ≤15kg Color: Standard gray |
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Operating voltage: AC220V (1±5%) 50Hz (1±5%) Battery: 5 hours of battery life at room temperature |
Power consumption: ≤60W (stable operation at 25℃) |
|
Operating temperature: -40℃ to +50℃ |
Storage temperature: -45℃～+80℃ |
Package List
|
Item |
Name |
Quantity |
Remark |
|
1 |
Main unit |
1 |
|
|
2 |
GPS/BeiDou Dual-Frequency Antenna |
1 |
|
|
3 |
Antenna cable |
1 |
Standard configuration includes 15-meter Φ5 cable |
|
4 |
Mounting bracket |
1 |
Includes mounting and fixing kit |
|
5 |
DC power cable |
1 |
Standard configuration 1.5 meters |
|
6 |
Standard RJ45 network cable |
Standard configuration 3 meters |
|
|
7 |
Product Instruction Manual |
1 |
|
Address: |
No. 3908 ShiBo Avenue, Baqiao District, Xi`an, China |
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Email: |
sales@go-satcom.com tech@go-satcom.com |
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