GPS183
Clock Module with GPS Satellite Receiver
IMS-GPS: Clock Module with GPS Satellite Receiver
The IMS-GPS is a 12-channel satellite clock module with GPS technology that has been developed from the ground up specifically for time and frequency synchronisation purposes. The IMS-GPS provides a high-precision, high-accuracy time and frequency reference for your Meinberg IMS system and is designed to receive signals from the U.S. Global Positioning System (GPS), allowing your Meinberg system to be used anywhere in the world.
How the IMS-GPS satellite clock works
The integrated GPS receiver requires an externally connected GPSANTv2 antenna to receive signals from GPS satellites.
Once the IMS-GPS is successfully initialised and synchronised, it distributes a 1PPS (pulse-per-second) reference clock signal and a 10 MHz reference frequency. These are then used by the IMS output modules to generate a wide variety of specific output signals used in a diverse range of applications. The precision and accuracy of the two aforementioned reference signals are critical in determining the corresponding precision and accuracy of the output signals.
The module also supports the IMS platform’s MRS functionality (Multi Reference Source) to utilise all available reference sources for synchronisation beyond the GNSS signals.
The IMS-GPS module is hot-swappable and is automatically detected and utilised when installed, even while the system is still in operation.
Use of Two IMS Receiver Modules
In systems equipped with two redundant IMS receiver modules, an RSC switchover module is used to switch between the two reference sources. The RSC serves to switch over the pulse and frequency outputs and serial interfaces of the connected reference clocks.
Key Features
- 12 channel GPS C/A code receiver with wide selection of oscillators
- Highly configurable pulse signals, including pulse-per-second and pulse-per-minute
- RS-232 interface for time string output and also for synchronization using time string input and PPS signal
- Included GPSANTv2 antenna uses downconverter technology to enable long transmission routes of up to 1100 m (1200 yards)
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Technical Specifications
| Humidity | Max. 85 % (non-condensing) at 40 °C |
|---|---|
| Interface | RS-232 interface for time string output and also for synchronization using time string input and PPS signal |
| Operating Voltage | +5 V DC |
| Accuracy of Frequency Outputs | Accuracy dependent on oscillator |
| Accuracy of Pulse Outputs | Depends on oscillator option: < ±100ns (TCXO, OCXO LQ) < ±50ns (OCXO SQ, OCXO MQ, OCXO HQ, OCXO DHQ, Rubidium) |
| Backup Battery Type | CR2032 (lithium button cell) |
| Current Draw | 1.1 A to 1.4 A (depends on oscillator option) |
| Frequency Inputs | 35.4 MHz (intermediate frequency of GPSANTv2) |
| Frequency Outputs | 0.125 Hz - 10 MH |
| Mixing Frequency | 10 MHz (from receiver) |
| Pulse Outputs | Various programmable pulse signals (TTL levels), including pulse-per-second and pulse-per-minute, outputs over four discrete channels, delivery via external output modules |
| Receiver | 12-channel GPS L1 C/A code receiver |
| Synchronisation Time | Max. 1 minute in normal operating conditions Max. 25 minutes (average 12 minutes) upon first initialization or in the absence of saved satellite data |
| Type of Antenna | Included GPSANTv2 antenna with innovative downconverter technology that allows transmission routes of up to 300 m using RG58 cable, 700 m using RG213 cable, and 1100 m using H2010 Ultraflex cable |
