DS-GPS-CLOCK
TECHNICAL REFERENCE MANUAL
4.3.2. Status
The status LED indicates the current status of the device:
4.4. Mounting the aerial
The aerial supplied with the DS-GPS-CLOCK is designed to be mounted magnetically on any metallic
surface. The cable length is 5 m.
Please contact your sales manager if your application requires a different aerial.
4.5. Warm-Up time
When the DS-GPS-CLOCK is used as a GPS based time code generator for the first time, has been
moved more than 200 km, or not used for 10 hours (since last usage), it is recommended to perform a
‘cold start’. To get the best performance from your GPS in the future, perform this cold start in an open
place with a good all round view to the sky. Allow the GPS to map the satellites for at least 20 to 30
minutes. The GPS builds up the ‘Ephemeris’ data on each satellite which is stored in a non-volatile
memory so that future satellite tracking is swift and stable. Once the GPS has carried out a successful
cold start, future satellite lock from power up will take between 15 seconds and 1 minute. Before going to
test in a shady environment with tall objects or near to trees, allow the GPS to settle in an open space for
5 to 10 minutes.
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At normal operation - when DS-GPS-CLOCK is
locked to the selected time source - it shortly
blinks once a second.
Image 3: LED: Normal Operation
When the time source signal is missing (neither
GPS or IRIG time code signal), the device
automatically goes to flying-wheel operation. This
is indicated by inverted blinking.
Image 4: LED: Missing Signal
