Rohde & Schwarz R&S UPP, Руководство пользователя

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Instrument Functions
R&S
®
UPP
426 User Manual 1411.1055.32 ─ 10
"Level THD" RMS value of the selected harmonic distortion products (distortion
value) over frequency
THD = Total Harmonic Distortion. Distortion is measured as an RMS
value using the harmonics to be set in the panel shown below. For
details on the calculation, see
Chapter 5.23.2, "THD" , on page 384.
The RMS value is displayed in voltage units (analog measurement
mode: V, dBu, dBV, etc.; digital measurement mode: FS, dBFS, etc.).
"THD" Total harmonic distortion over frequency
The total harmonic distortion measurement shows the relationship
between the RMS value of the harmonics set in the panel below and
the total RMS value, and gives the result in the units % or dB. For
details on the calculation, see
Chapter 5.23.2, "THD" , on page 384.
Remote command:
SENSe[1]:CHIRpbased:MMODe:SWEep<n4>:A
on page 765
SENSe[1]:CHIRpbased:MMODe:SWEep<n4>:B
on page 765
Even Harmonics, Odd Harmonics
Selection of the desired harmonics. This panel only appears if the chirp
‑
based mea-
surement function "Level THD" or "THD" is selected.
The RMS value of the selected harmonics is measured. The chirp
‑
based measurement
function "Level THD" or "THD" above it determines whether the RMS value is dis-
played directly or in relation to the total RMS value. For details on the calculation, see
Chapter 5.23.2, "THD" , on page 384.
Remote command:
SENSe[1]:CHIRpbased:DISTortion<n3>:SWEep<n4>:A
on page 765
SENSe[1]:CHIRpbased:DISTortion<n3>:SWEep<n4>:B
on page 765
Filter
Three digital filters (user
‑
definable filters or weighting filters) in the measurement path.
The user
‑
definable filters are configured as filter 01 to 09 in the filter panel (see Chap-
ter 5.40, "User-Definable Filters" , on page 469) and can then be used (repeatedly if
necessary) in the analyzer.
For more information on the available weighting filters, see Chapter 5.41, "Weighting
Filters" , on page 478.
Chirp
‑
Based Measurement