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Instrument Functions
R&S
®
UPP
391
User Manual 1411.1055.32 ─ 10
For alternative distortion measurement, see
For more distortion measurements, see
Chapter 5.23, "Distortion Measurements"
Function (THD+N & SINAD)
Selection of THD+N & SINAD measurement.
Remote command:
THDNsndr
Meas Mode
Used to select the THD+N measurement method and the calculation formula for the
measured value.
The term
Level
indicates that the measurement result is displayed as an RMS value
and is not relative to the total RMS value (as is customary with distortion measure-
ments).
With the
Noise
measurements, it is also possible to filter all harmonics (except the fun-
damental) out of the overall signal.
Note:
The noise energy of the respective sideband is also filtered out with each har-
monic so that with very low frequencies - with theoretically with large numbers of har-
monics - a large part of the noise energy is lost. To counter this, measurement is per-
formed with a very fine frequency resolution, which (compared to the THD+N measure-
ment) results in a considerably longer measurement time. The Level measurement
modes should therefore only be used for high frequencies.
Distortion Measurements
Summary of Contents for R&S UPP
Page 1: ...R S UPP Audio Analyzer User Manual User Manual Version 10 1411105532 ÅP ...
Page 34: ...Contents R S UPP 18 User Manual 1411 1055 32 10 ...
Page 630: ...Instrument Functions R S UPP 614 User Manual 1411 1055 32 10 Format ...
Page 631: ...Instrument Functions R S UPP 615 User Manual 1411 1055 32 10 Format ...