|
Procedure: SHANEAO Sodium Filter
When deploying the Sodium filter into the light path,
set cx=-0.03 and cy=-0.03 in the fieldsteer.tcl
GUI to correct centering.
When retracting the Sodium filter from the light path,
remember to go Back On-Axis in the fieldsteer.tcl
GUI.
The need to modify cx and cy possibly results from tilt
during installation.
The (narrower passband) Sodium filter from the original Lick AO system was
installed into ShaneAO 2017-01-14.
Manipulation Using Keywords
The Sodium filter stage is controlled by the keyword SODIUMFILT,
with values In, Out and Moving/Unknown.
gshow -s saomot sodiumfilt
SODIUMFILT = In
modify -s saomot sodiumfilt=out
setting sodiumfilt = Out (wait)
gshow -s saomot sodiumfilt
SODIUMFILT = Out
A 'modify' of SODIUMFILT will not return until the
filter flipper has changed position (or times out after 5 seconds of
waiting).
SODIUMFILT is built upon two lower-level keywords:
-
SODIUM_CMD controls the output signal to the filter
flipper:
modify -s saomot SODIUM_CMD=In
-
SODIUM_POSN monitors the input signal from the filter flipper:
gshow -s saomot SODIUM_POSN
SODIUM_POSN = In
(SODIUMFILT is set to Moving/Unknown
when SODIUM_POSN does not match SODIUM_CMD)
Change Log:
- 2017-01-14: Updated.
- 2014-12-01: First version.
|