Transfer Fine Time From Fine Clock To Warm Clock Receiver; Pps Alignment - Novatel OEM6 Series User Manual

Operation OEM6 Cards and Enclosure
Transfer FINE Time from a Fine Clock to a Warm Clock GPS Receiver
1. Connect the 1 PPS signal of the fine clock receiver to the Mark 1 input (Event1) of the warm
clock receiver as shown in Figure 21.
Figure 21: Transfer FINE Time from Fine Clock to Warm Clock Receiver

If Receiver 2 is not in coarsetime, the input is ignored.
2. Issue the following command to the warm clock receiver:
adjust1pps mark
The phase of the warm clock receiver clock is adjusted by the fractional measurement of the fine clock
receiver's 1 PPS mark input event. In other words, it synchronizes the warm clock receiver's 1 PPS to the
incoming 1 PPS of the fine clock receiver. It does not adjust the one second TOW counter or the
receiver's week number. This procedure is used to make small corrections to the warm clock receiver's
clock.
Fine Clock
Receiver
connected to COM
Input on Warm
Clock Receiver
1PPS on Fine
Clock Receiver
connected to MK1|
on Warm Clock
Receiver
OEM6 Family Installation and Operation User Manual Rev 7
Fine Clock
Figure 22: 1 PPS Alignment
TIMESYNC log
transmit time is
dependant on baud
RS-232
TTL
10 ms
1PPS IN
(1 ms)
Warm Clock
The next
TIMESYNC log
is triggered by
the next PPS
Chapter 4
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