Chapter 2 SCPI Device Message Details
2-158
:CALCulate:MARKer[1]|2|3|4|5|6|7|8|9|10:FCOunt:X?
Frequency Counter Query
Function
This command queries the measured value of the frequency counter.
Query
:CALCulate:MARKer[n]:FCOunt:X?
Response
<freq>
Parameter
<n>
Marker number
1
Marker 1
2
Marker 2
3
Marker 3
4
Marker 4
5
Marker 5
6
Marker 6
7
Marker 7
8
Marker 8
9
Marker 9
10
Marker 10
When omitted: Marker 1
<freq>
Center frequency of zone maker
Range –99.999999999999 GHz to 99.999999999999
GHz
Resolution 0.001 Hz
Suffix code None
–999999999999 is returned when no
measurement is executed or when there is an
error.
Details
A non-measurement value is returned when a marker number other than
that of the active marker has been specified.
A non-measurement value is returned when the Marker Mode is either
Fixed or Off.
Example of Use
To query the frequency counter value of marker 1.
CALC:MARK:FCO:X?
> 100000000.00
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