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Sun Nov 2 21:37:22 2008
The ranger signal has been bad since around 11 AM on Oct 25 (last Saturday). There are no elog
entries from that day, but I am quite sure that someone must have been working around the PSL
It looks like what happened is that someone moved the chair with the monitor on it and/or the wooden
stool next to it. That put tension on the cable connecting the SR560 and the seismometer. The SR560
connector now seems loose and I think probably the cable ground wasn't connected. I swapped the
cable over to the "B" side of the SR560 and the ranger signal is now reasonable (very small offset
and normal seismic signal).
Please be careful when working around there. Everyone always says "I didn't do anything" or "it doesn't
We need to clean up the cabling around there in addition to
running a new power cable for the RF amplifier
on the POY table.
I have also reduced its sample rate from 2048 to 512 Hz. The data are OK after 909640694.
I also increased the sample rate of AS_MIC from 2048 to 16384 Hz but that one seems to be broken
the microphone seems to be either disconnected or broken