Rohde & Schwarz R&S UPP, User Manual

Page: 448 / 938

Instrument Functions
R&S
®
UPP
432 User Manual 1411.1055.32 ─ 10
"Compressed" Compressed recording of the samples produced by peak value rectifi-
cation. Specifying a value (n) for the "Comp Fact" (compression fac-
tor) in the next operator field means that the highest value out of
every n consecutive samples is determined and this peak value is
used as the input signal for the waveform function. The maximum
recording time increases in proportion to the factor n.
Since this waveform contains only positive data, a logarithmic display
is possible.
Recommended for recording low-frequency signals if the standard
recording time is too short or the only aspect of interest is the peak
value trace (envelope).
Note: "Delay Ch1" or "Delay Ref Chan" (only for the "FFT" measure-
ment function) cannot be used in this mode and is thus set to 0 s.
"Undersample" Compressed recording of the samples produced by undersampling.
Specifying a value (n) for the "Comp Fact" (compression factor) in the
next operator field means that only every nth sample is recorded. The
maximum recording time increases in proportion to the factor n.
Recommended for recording low
‑
frequency signals if the standard
recording time is too short and the signal trace over time is of inter-
est.
Note: "Delay Ch1" or "Delay Ref Chan" (only for the "FFT" measure-
ment function) cannot be used in this mode and is thus set to 0 s.
Remote command:
SENSe7:MMODe
on page 767
Comp Factor
Used for entering the compression factor in compressed recording.
The factor entered here is the factor by which
●
the maximum recording time and pretrigger time increases compared to standard
recording
●
the time resolution deteriorates compared to standard recording
The size of the trace memory (480000 samples) and pretrigger memory (19200 sam-
ples) remains unaffected.
A reduction in the compression factor reduces the maximum possible recording time
and therefore where appropriate also the set recording and pretrigger times.
An increase in the compression factor does not alter the set recording time, but only
the maximum possible recording and pretrigger times. You can then set a longer
recording time ("Trace Length") and a longer pretrigger time.
Remote command:
SENSe<1|7>:CMPFactor
on page 767
Trace Length
Used to enter the recording length (memory depth), including an optional pretrigger, in
seconds.
Analysis in the Time Domain