DOC 6501_Release V
ATS-6501 Users Guide
46
2. Using the TIC, measure the delay on the 1PPS cable between the Reference 1PPS and
4393A Card.
3. Measure the delay on the T-Flex TIC card input using a cable with a known delay and
connecting Slot 1 Port 1 (PPS Out) on the ATS-6501 to the TIC card (ex. 4393A) input.
Connect to Port 2101 and record the delay for that channel. Value should be in the low
nanoseconds.
TIC Card Delay = Port 2101 Value – Cable Delay = ____________________ns
4. Set the ATS-6501 up:
dpll_phase 0
steer_source manual
reference_type clock type
reference external
save
5. Power Cycle the ATS-6501.
a. Let the Osc Lock light come on.
b. Telnet to the ATS-6501 command port (1700).
c. Use the force_time command to set the system time.
d. Let the Outputs Enable light come on before proceeding.
6. Connect to Port 2101 and look at the measurement for the 1PPS Offset, use that value to
remove the offset. The offset should be larger than 100nSec. Smaller increments will be
ignored.
adjust_pps <value reported on port 2101>
7. Check the TIC Counter and use the value reported to set the dpll_phase value. This value
should be the inverse of the value reported on the TIC.
dpll_phase <TIC Value * (-1)>
save
To Next Page
Loading...
