Here command has a slightly different usage on a TGPMT card , then on all our systems.

Actuators , Piezos, MicroMirror etc

MS2000 or RM2000 syntax

Shortcut	H
Format	HERE [axis]=[position in 1/10 microns]…
Units	1/10 microns
Remembered	Automatically

Tiger syntax

Shortcut	H
Format	HERE [axis]=[position in 1/10 microns]…
Units	1/10 microns
Type	Axis-Specific
Remembered	Automatically

Assign the specified number to the axis’s current position buffer. If no position is specified, 0 is assumed. The unit of measurement is in tenths of microns. This defines the current position to be a specific distance from the origin (0), i.e., the origin may change.

If there are no errors, the positive reply :A will be sent back from the controller

DOES NOT WORK FOR PIEZOS AND MICROMIRRORS. <del> DOES NOT WORK FOR “CLOCKED DEVICES” SUCH AS FILTER SLIDERS AND TURRETS.</del>

Example

H X=1234 Y=4321 Z
:A

The X position will change to 123.4 microns from the origin, Y will change to 432.1 microns, and the Z will be zeroed.

TGPMT usage

Shortcut	H
Format	HERE [axis] or HERE [axis]=0
Type	Axis-Specific
Remembered	Automatically

On a TGPMT card , this command this used to Zero the PMT signal reported by the RDADC command. When this command is issue , the current PMT signal is saved , and the controller begins subtracting it from the current PMT signal. Users can use this as a background subtract or offset feature.

User can cancel the zeroing by issuing HERE [axis]=0 . Readings reported by RDADC command will not be altered anymore.

Only the readings reported by the RDADC command are altered. 0-4V Analog PMT signal on the BNC connector is not altered.

This is a card wide-settings , both PMT0 and PMT1's reading are altered.

More details here.

Example

h m
:A

If the TGPMT card axis char is m. Saves the current PMTs readings and starts subtracting them from RDADC commands reported readings.

h m=0
:A

If the TGPMT card axis char is m. Clears the saved PMTs readings and stops subtracting them from RDADC commands reported readings.