144 Chapter 7
Controlling the OBR Remotely
a trace (“A” through “E”) or the word (“DEFAULT”) must
be specified as a parameter.
Response: Returns the coefficients defined for the specified trace, or
the default coefficients that will be used for new
measurements. There are five temperature coefficients
labeled t0 through t4, and five strain coefficients labeled s0
through s4. All values are prefaced by their label and
separated by tab characters.
Example: CONF:COEF?
A
This query returns a message in the form
t0: 0.000000 t1: -0.801388 t2: 0.000000
t3: 0.000000 t4: 0.000000 s0: 0.000000
s1: -6.668000 s2: 0.000000 s3: 0.000000
s4: 0.000000
Data Capture and Retrieval Comman
ds
FETCh:FREQuency?
Usage: FETC:FREQ?
{trace}
Description: Queries the OBR for the starting frequency and the
increment size, both in units of GHz.
Response:
Returns
the
starting frequency
and
increment
size, separated
by a comma.
If no trace is specified, the values for Trace A will be
returned. If a successful scan has not been made before this
query, the OBR responds with “Trace A (B, etc.) contains
no data.”
Example: FETC:FREQ?
B
This query returns a message in the form
“193414.488699,0.001214,” meaning the
starting frequency
for Trace B is 193414.488699 GHz and the frequency
increment size/sample spacing is 0.001214 GHz.
FETCh:FSIZe?
Usage: FETC:FSIZ? {trace, domain, graphType, decimate} Trace
is specified as a single letter: A, B, C, D or E. Domain
can
be set to 0 for time domain, or 1 for frequency
domain.
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