Keysight Technologies M8131A, Руководство пользователя

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108 Keysight M8131A 16/32 GSa/s Digitizer User’s Guide
4 Remote Programming
:CHANnel<N>:DPRocessing: CHARacteris[:VALue]
Query
:CHANnel<N>:DPRocessing:CHARacteris[:VALue]? [{S16G |
S32G}]
Description The query returns the frequency and phase response data for a channel as
a string of comma-separated values.
Returned Format [:CHANnel<N>:DPRocessing: CHARacteris[:VALue]]
<freq_resp><NL>
<freq_resp> A comma-separated list of 321 triples. Each triple consists of:
• Input frequency in Hz starting at 0 Hz with a spacing of 25 MHz for a
sample rate of 16 GSa/s and 50 MHz for a sample rate of 32 GSa/s.
• Corresponding relative magnitude in linear scale
• Corresponding phase in radians
Example of the returned frequency response data for 32 GSa/s mode:
0.00000,1.00000, 0.00000,
5.00007,9.998865128E-01,-4.444515407E-01,
...
1.59510,3.858275712E-01,-9.67101,
1.60010,3.722717166E-01,-9.71801
:CHANnel<N>:DPRocessing:FILTer[:VALue]
Command
:CHANnel<N>:DPRocessing:FILTer[:VALue] {[{S16G |
S32G}], filter_values}
Description The command sets the 49 correction filter coefficients for the specified
channel. If the optional parameter of sample rate mode is given, it sets the
filter values for the specified sample rate otherwise for the current sample
rate mode. The correction filter is applied directly after the conversion by
the ADC and before further processing, for example by the DDC.
<N> An integer, 1-4 in a single digitizer system.
S16G Selects the coefficients for 16GSa/s
S32G Selects the coefficients for 32GSa/s