Technical data

Operation
Table 3-1: LED Display
Conditions Yellow
(no GPS)
Green
(Osc. On)
Red
Alarm
Warm-up mode (~ 6
minutes from switch-on)
Off Off Flash
After warm up – outputs
but not valid
(Stabilization)
Off Flash Off
Normal operating mode Off On Off
Flywheeling (in spec. or
timed out)
On Off Off
Recovery from
Flywheeling (stabilization)
Off Flash Off
GPS Receiver failed self
test
Off Off On
Firmware Update
Download Process
Flash Flash Off
No power Off Off Off
NOTE
On switch-on, the front panel LEDs will flash in order, (i.e. RED followed by YELLOW
followed by GREEN).
Command Channel Operation
Control of the GPS Receiver is accomplished through the Command
Channel port, J7, on the rear panel. The Command Channel port
should be connected to the serial port of a PC running terminal
software.
GPS Timing Receiver Installation and Operation Manual
3-3