Frequency And Phase Response Data Access; Source]: Characteris[1|2|3|4][:Value]? [<Amplitude>[,<Sample_Frequency>]] - Keysight M8195A User Manual

6 General Programming
6.19

Frequency and Phase Response Data Access

6.19.1 [:SOURce]: CHARacteris[1|2|3|4][:VALue]? [<amplitude>[,<sample_frequency>]]
Command
Long
Parameters
Parameter Suffix
Description
Example
236
:CHAR?
:CHARacteris?

<amplitude> the output amplitude
 <sample_frequency> the sample frequency
None
Query the frequency and phase response data for a channel. The query returns the
data for the AWG sample frequency and output amplitude passed as parameters as a
string of comma-separated values. If the sample frequency or both parameters are
omitted, the currently configured AWG sample frequency and output amplitude are
used.
The frequency and phase response includes the sin x/ x roll-off of the currently
configured AWG sample frequency. As a result the query delivers different results
when performed at e.g. 60GSa/s or 65 GSa/s.
To achieve optimum frequency and phase compensation results, the frequency and
phase response has been characterized individually per channel and for different
output amplitudes. As a result, the query delivers different results when performed at
e.g. 500 mV or 800 mV.
The frequency and phase response refers to the 2.92 mm connector. In case external
cables from the 2.92 mm connector to the Device Under Test (DUT) shall be
mathematically compensated for as well, the corresponding S-Parameter of that
cable must be taken into account separately.
Format: The first three values are output frequency 1 in Hz, corresponding relative
magnitude in linear scale, corresponding phase in radians. The next three values are
output frequency 2, corresponding relative magnitude, corresponding phase, and so
on.
Query
:CHAR2?
"0,1.01068,0,
1e+008,1.00135,-6.11215e-005,
2e+008,0.993992,-0.000179762,
...
3.19e+010,0.0705237,-3.82659,
3.2e+010,0.0665947,-3.85028"
Keysight M8195A Revision 2 – Arbitrary Waveform Generator User's Guide