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operations:documentation.clock_and_delay_check [2014/10/30 18:02] Lucia McCallum [Field System and station time agreement] |
operations:documentation.clock_and_delay_check [2015/06/17 23:28] Lucia McCallum [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. | ||
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+ | **Be sure that mk5=dot? returns FHG_off before you run fmset. Sometimes if a power glitch occurs while the Mark5 is recording, it can get stuck. If FHG_on, end with disk_record=off and then run fmset again | ||
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+ | During the observation, it is useful to monitor the delay difference on a plot. to do it, you can start a terminal on ops2 (or ops1hb at MtPleasant) and <code>cd /vlbobs/ivs/logs</code> Then start gnuplot: <code>gnuplot</code> You shall start and/or refresh the plot window for each station by hand each time you wish to see the plot: | ||
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+ | <code> | ||
+ | set term 'wxt' 0 ; plot "hb_ddif.txt" | ||
+ | set term 'wxt' 1 ; plot "ke_ddif.txt" | ||
+ | set term 'wxt' 2 ; plot "yg_ddif.txt" | ||
+ | </code> | ||
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=====GPIB communication with Agilent counters ===== | =====GPIB communication with Agilent counters ===== |