Depending on the conditions, the module can work in one of the following modes:
Initialisation: After a power-up, the initialisation mode assures the configuration of the system. The typical time to perform the configuration of the system is up to 10 seconds.
Warm-up: In this mode, the system is waiting for the GPS initialisation (Satellites acquisition, tracking algorithms..) and for stabilisation.
Tracking Fast: After the warm-up phase, the oscillator is ready to be tracked, but with a short time constant to assure that the system is able to compensate for the deviation of the phase during the retrace phase of the oscillator.
The duration of this phase depends of the status of the oscillator regarding the following process:
During WARM-UP phase, the system continuously monitors the slope of the phase variation versus time between the oscillator signal and the frequency reference (GPS).
- The system stays in WARM-UP mode (cold oscillator or unavailable reference)
-The system enters in long time TRACKING FAST mode (1 hour)
- The system enters in short time TRACKING FAST mode (10 minutes)
- The systems enters directly in NORMAL TRACKED mode.
Normal Tracked: This is the normal mode of working. The system uses the time constant defined by the user (2000s by default)
Holdover: If no input is available, the module enters in holdover mode. The tracking function is blocked and the oscillator delivers its own frequency for the outputs.
Plug the supply cable into the GPS receiver.
A few seconds after power-up, the status of the system must be: Green LED blinking. This indicates that one or more unmasked alarm conditions are active on the module (INIT/WARM-UP, GPS, Oscillator alarm conditions).
If the Red LED is blinking, it indicates a connection problem between the module and the antenna (antenna over-current or undercurrent ). This indication may appear for a few minutes after power-up.
After approximately 12 minutes:
Red LED on: GPS reference unavailable and the module is in HOLDOVER mode
Green LED blinking: GPS reference is available and the module is operating in TRACKING FAST mode. Depending of the status of the oscillator, the TRACKING FAST mode duration can be either 10 minutes or 1 hour.
Green LED on. Means that the module is working in NORMAL TRACKED mode.
The unit is does not need any further configuration.