I unlocked the PMC and swept over C1:PSL-PMC_RAMP's full range a couple of times this morning. The PMC should now be relocked and returned
BLUE: Output of filter bank during an FM9 turn off. This is the transient which goes to the DAC.
The transients are mostly of the same magnitude as this.
RED: This is the input of the filter module during another such transient.
GREEN: Tried another switch; this time I filtered the time series in DTT by typing the SimDW into
the Triggered Time Series filter field. This should be simulating what comes out of the
output of the DW board - to convert to volts multiply by 15/32768.
PURPLE: Same kind of filtering as the GREEN, but with also a double 30 Hz highpass to remove the low
frequency damping control signals. You can see that the total transient is only ~5 counts
or ~1 mV at the coil driver output. This is comparable to the relative offset in the bypass
and filter paths.
Joe and I have taken control of the EPICS channels C1:PEM-Stacis_EEEX_geo and C1:PEM-Stacis_EEEY_geo since we heard that they are no longer in use. We are currently
using them to test the ability for the Snap camera code to read and write from EPICS channels. Thus, the information being written to these channels is completely unrelated
to their names or previous use. This is only temporary; we'll create our own channels for the camera code shortly (probably within the next couple of days).