Novatel OEM615, Installation And Operation Manual

Page: 70 / 208

Operation OEM6 Cards and Enclosures Chapter 4
OEM6 Family Installation and Operation User Manual Rev 12 70
Transfer FINE Time (<50 ns) from a Fine Clock to a Cold Clock GPS Receiver
1. Connect a COM, USB or Ethernet port from the fine clock receiver to the cold clock receiver (for
example, COM2 on the fine clock receiver to COM3 on the cold clock receiver), as shown in Figure 31,
Transfer FINE Time from Fine Clock to Cold Clock Receiver on page 70. Configure both ports to the
same baud rate and handshaking configurations.
Figure 31: Transfer FINE Time from Fine Clock to Cold Clock Receiver
2. Issue the following command to the fine clock receiver:
log com2 timesyncb ontime 1
3. Connect the 1PPS signal of the fine clock receiver to the Mark 1 input (Event1) of the cold clock receiver.
4. Issue the following command to the cold clock receiver:
adjust1pps markwithtime
When the cold clock receiver receives the 1PPS event from the fine clock receiver, it checks to see if a valid
TIMESYNC log has arrived within 200 ms of the last 1PPS event. If so, it sets the cold clock receiver clock to
the time of the fine clock receiver. See
Figure 33, 1 PPS Alignment on page 72.
Fine Clock
Cold Clock