10 Hardware-Accelerated Fast Power Measurement (Remote Command Only)
10.9 Diagnostic Binary Read Fast Power Measurement (Remote Command Only)
10.9 Diagnostic Binary Read Fast Power Measurement (Remote
Command Only)
Shorthand for :INIT immediately followed by :FETC?. The returned results are in
binary format. This command is used primarily for diagnostic purposes, to test for
ADC overloads and to visibly inspect the spectrum.
Remote
Command
:CALCulate:FPOWer:POWer[1,2,…,999]:READ2?
Example
:CALC:FPOW:POW1:READ2?
Notes Option FP2 is required
Note that Spectrum data is only returned if IncludePowerSpectrum is set to True (see "Include
Power Spectrum" on page 2838). If IncludePowerSpectrum is False, the number of spectrum
points is zero (0)
Units of the returned values are dependent on the Function parameter per channel (e.g. dBm for
BandPower, Hz for PeakFrequency)
Returns binary data (Little-Endian) that contains information on m amount of channels, along with ADC
over range and full spectrum data
The following is the binary format of the response
Bandwidth Return Value
1. Number of channels specified, m [4-byte int]
2. Declared function result for the 1st specified channel [4-byte float]
3. Declared function result for the 2nd specified channel [4-byte float]
…
(m + 1). Declared function result for the last (mth) specified channel [4-byte float]
ADC Over Range
1. ADC over-range occurred (1: true, 0: false) [2 byte short]
Spectrum Data
1. Number of points in the spectrum data, k [4-byte int]
2. Start frequency of spectrum data (Hz) [8-byte double]
3. Step frequency of spectrum data (Hz) [8-byte double]
4. FFT bin at 1st point (dBm) [4-byte float]
5. FFT bin at 2nd point (dBm) [4-byte float]
…
(k + 3). FFT bin at last (kth) point (dBm) [4-byte float]
Spectrum Analyzer Mode User's &Programmer's Reference 2851
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