User`s manual

Controlling VariSpec Filters — 25
amount from its present wavelength, upon receipt of an eXecute command or an
external hardware trigger pulse in mode 4. At power-up Jump is set to 5.00. The
jump step can be any value consistent with the tuning range of the filter, given the
specifications.
Legal <arg> values: determined by filter optics
Query reply: present jump size in nm
Mode Select
M <arg> <term>
Command: set the Control Mode. Legal modes are 0 (sequential on sync) and 4
(move wavelength step on sync).
Mode 0 is sequential. The filter changes wavelength upon receipt of the sync
pulse. In Mode 4, the filter steps in wavelength as set by the “J” command,
triggered by the sync signal.
Legal <arg> values: [0, 4]
Query reply: present mode
Palette Select
P <arg> <term>
Command: go to palette element <arg>. If that element is undefined, an error is
generated and the Status LED is lit Red. The palette uses 0-based indexing, so the
first element is element 0.
You may also use the “>” character as <arg>, to request the next palette element;
or the “<” character, to request the previous palette element.
Legal <arg> values: [0 - 127], “<”, “>”
Query reply: present palette element number; 255 if palette element undefined
Reset
R <arg> <term>
Command: resets any pending fault conditions if <arg> is nonzero. This also
resets (to green) the Status LED if it is lit Red on the front panel. It is a good idea
to send an <esc> before sending the “R” command, if previous commands were
garbled in transmission. The <esc> clears the VariSpec communications buffer
and insures the “R” command is received properly.
Legal <arg> values: [0 or 1]
Query reply: 0 if no fault, error code otherwise
Sleep
S <arg> <term>
Command: puts filter to sleep with ID number given by <arg>. The ID number is
the filter’s 5-digit serial number, such as 50527, 50782, etc.
Legal <arg> values: [0 - 65535]
Query reply: 0 if awake, no reply if asleep