124 Chapter 7
Controlling the OBR Remotely
*TST?
Usage:
*TST?
Description: Performs a self-test query.
Response: None.
System Level Commands
SCAN
Usage:
SCAN
Description: Tells the OBR to execute an optical Scan based on the
configured system parameters. Depending on the
wavelength range (CONF:RANG) setting and Scan Rate
(CONF:RATE), this command may take up to several
minutes to complete.
Response:
None.
Note: It is advisable to use the *OPC? query until it returns a “1,”
to verify that the Scan has been completed.
It is also advisable to use the SYST:ERR? query after each
SCAN command and before attempting to retrieve the data
with FETC queries. This will reveal any errors that occurred
during the Scan.
SYSTem:SPOTscan
Usage: SYST:SPOT {center, centerUnits}
Description: Tells the OBR to execute an optical Spot Scan based on the
configured system parameters. A Spot Scan is performed
over the same
wavelength
range
(CONF:RANG)
that would
be used for a regular Scan (triggered by the SCAN
command), but only a portion of the data is returned. The
data returned is centered around the x-axis location
“center,” in units “centerUnits.” Values for “centerUnits”
are: 0 for time (ns), 1 for length (m), 2 for length (ft), 3 for
inches (in), or 4 for millimeters (mm).
Response:
None.
Example: SYST:SPOT 1.5,
1
This command performs a spot scan centered around 1.5 m.
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