146 Chapter 7
Controlling the OBR Remotely
This query should be called before performing the
FETC:MEAS? command if the controller program needs to
pre-allocate space for the data.
Example: FETC:FSIZ? A, 0, 0,
1
This command returns the data array size of Trace A’s time
domain amplitude data, with data decimation on.
Response: The response is an integer indicating the number of data
samples to expect from the FETC:MEAS? queries.
If a successful scan has not been made before this query,
the OBR responds with “Trace A (B, etc.) contains no data.”
FETCh:GraphNAMe?
Usage:
FETC:GNAM?
Description: Retrieves the available graph names for all numeric values
of graphType for both time and frequency domain. This
allows the user to see what curve is associated with what
graphType value when calling FETC:MEAS? and other
commands that use the graphType parameter.
Response: The query returns the list of values of graphType for each
domain, as shown above under FETC:FSIZ?, beginning on
page 145.
FETCh:GraphSTRings?
Usage: FETC:GSTR? {domain, graphType, xUnits}
Description: Retrieves the graph title or name, the Y-axis label, and the
X-axis label for the specified domain, graphType, and
xUnits.
Domain can be set to 0 for time domain, or 1 for frequency
domain.
GraphType can take values from 0 to 4 or 8, as shown in
the table beginning on page 145. The assignment of
graphType depends on which domain is specified.
xUnits for the time domain can be set to 0 for time (ns), 1
for length (m), 2 for length (ft), 3 for inches (in), or 4 for
length (mm).
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