CMG-DCM / AM - Güralp Systems Limited
CMG-DCM / AM - Güralp Systems Limited
CMG-DCM / AM - Güralp Systems Limited
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<strong>CMG</strong>-<strong>DCM</strong> Data Communications Module<br />
has the format<br />
key-id:days-since-epoch:seconds-since-day-start<br />
where days-since-epoch is the number of days elapsed since<br />
November 17, 1989. The CD1.1 transmitter scans this file in<br />
order, and stops when it finds a key with an activation time in<br />
the past (relative to the time-stamp of the data being<br />
transmitted.) Thus, to supersede an existing key, you must place<br />
the new entry before the old one in the file, so that the CD1.1<br />
transmitter will not continue signing subframes with the old<br />
key.<br />
To make the CD1.1 transmitter sign all subframes with a new<br />
key, even when backfilling, you should add the line<br />
key-id:0:0<br />
to the beginning of the file.<br />
9. If you are running it, restart the CD1.1 transmitter with the<br />
command killall -HUP cd11sf. (Using the -HUP option<br />
makes the command send a hangup signal to the CD1.1<br />
transmitter rather than killing it outright.)<br />
10.If you are running it, restart the CNSN transmitter with the<br />
command killall -HUP cnsnauth<br />
50 Issue F