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operations:documentation.clock_and_delay_check [2012/08/15 04:36] Jim Lovell created |
operations:documentation.clock_and_delay_check [2014/10/30 18:02] Lucia McCallum [Field System and station time agreement] |
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The fmset program can be used to confirm that the Field system time agrees with the station time. Open a terminal on pcfs[hb|ke|yg], and type | The fmset program can be used to confirm that the Field system time agrees with the station time. Open a terminal on pcfs[hb|ke|yg], and type | ||
<code>fmset</code> | <code>fmset</code> | ||
- | The Field System and Computer times should agree. | + | The Field System and Computer times should agree. Press the <esc> key to exit fmset. |
+ | |||
+ | If fmset if not successful (persistent clock differences), it might be wirth to (a) reboot the Mk5, (b) check the DBBC and/or reconfigure/reboot the DBBC. | ||
===== Maser to GPS, Formatter to GPS delays and difference ===== | ===== Maser to GPS, Formatter to GPS delays and difference ===== | ||
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If one or both counters are not responding to these commands, you will see an error message like this <code>ERROR sp -4 GPIB Device time-out on response c2</code> To fix this, try re-setting the counters. In the Operator Input window, type <code>counter</code> and try the ''maserdelay'' and ''clkoff'' commands again. | If one or both counters are not responding to these commands, you will see an error message like this <code>ERROR sp -4 GPIB Device time-out on response c2</code> To fix this, try re-setting the counters. In the Operator Input window, type <code>counter</code> and try the ''maserdelay'' and ''clkoff'' commands again. | ||
+ | |||
+ | =====GPIB communication with Agilent counters ===== | ||
+ | If the GPIB has been restarted (via the PDU internet power switch, or a power outage) a field system restart is probably required to re-establish communications with the counters connected to the GPIB. Symptomatic is ''fmset'' working OK, sync_error=0, but ''counter'', ''clkoff'','' maserdelay'' commands not working; the ddiff counter showing random large offsets and/or changing rapidly. Restarting the field system should bring the ddiff counter back to a steady several microseconds and enable GPIB comms. | ||