User's Manual Part 1

72 OEMV Family Installation and Operation User Manual Rev 5B
Chapter 4 Operation
The section that follows gives procedures for transferring time from a Fine Clock receiver to a Cold or
Warm Clock receiver.
4.9.3 Procedures to Transfer Time
These procedures are to transfer time between a Fine Clock and a Cold or Warm Clock GPS receiver.
Transfer COARSE time (<10 ms) from a Fine Clock to a Cold Clock GPS receiver
1. Connect a COM port from the Fine Clock to the Cold Clock (for example, COM2 on the
Fine Clock receiver to COM3 on the Cold Clock receiver). Configure both ports to the
same baud rate and handshaking configurations.
2. Issue this command to the Fine Clock receiver:
log com2 timesyncb ontime 1
3. Issue this command to the Cold Clock receiver:
adjust1pps time
When the Cold Clock receiver receives the TIMESYNC log, it sets its clock allowing for a 100 ms
transfer delay.
Transfer FINE time (<50 ns) from a Fine Clock to a Cold Clock GPS receiver
1. Connect a COM port from the Fine Clock to the Cold Clock receiver (for example, COM2
on the Fine Clock receiver to COM3 on the Cold Clock receiver). Configure both ports
to the same baud rate and handshaking configurations.
2. Issue this 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 this 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 it has received a valid TIMESYNC log 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 21, 1PPS Alignment on Page
73 below.
Transfer FINE time from a Fine Clock to a Warm Clock GPS receiver
1. Connect the 1PPS signal of the Fine Clock receiver to the mark 1 input (Event1) of the
Warm Clock receiver.
2. Issue this command to the Warm Clock receiver:
adjust1pps mark