R&S
®
ZVA / R&S
®
ZVB / R&S
®
ZVT GUI Reference
Channel Menu
Operating Manual 1145.1084.12 – 30 348
dialog.
Abort Sweep aborts the calibration, e.g. in order to change the sweep settings.
The calibration sweeps are performed according to the settings shown in the Source/Receiver Cal
Settings panel below the list of calibrations. Modify Settings... opens the Modify Source Power Cal
Settings dialog to modify the essential settings of the next calibration sweep.
Power Meter selects an external power meter that is used to measure the exact source power at
the calibration plane; see Power Meter Settings in the Power Calibration section. Power meters
(Pmtr1, Pmtr2, ...) must be configured in the System Configuration – External Power Meters
dialog before they appear in the list.
Perform Verification Sweep after Cal enables or disables a verification sweep that the analyzer
performs after the source power calibration. The sweep is also displayed in the calibration sweep
diagram. Its purpose is to test the accuracy of the source power calibration after the final
correction data has been acquired. The final power calibration results are applied starting with the
first sweep after the verification sweep.
SOURce<Ch>:POWer<Pt>:CORRection:PMETer:ID
SOURce<Ch>:POWer<Pt>:CORRection:HAMonic[:ACQuire]
[SENSe<Ch>:]CORRection:POWer<Pt>:HARMonic:ACQuire
Intermodulation Distortion Measurement (R&S ZVA and R&S ZVT)
The Intermod Distortion Meas submenu controls the intermodulation distortion measurement including
power calibration and system error correction. The intermodulation distortion measurement requires option
R&S ZVA-K4. The results can be selected from the Trace – Measure – Intermod Distortion Quantities
submenu.
Intermodulation measurement, test setups
An intermodulation measurement is performed with two RF signals of equal power but different
frequencies termed the upper and lower tone. The purpose of the measurement is to test the properties of
a DUT that is supplied with a signal that covers a frequency band, typically a modulated RF channel. To
simulate this scenario, the frequency difference ("tone distance") between the upper and lower signal is
chosen to be small compared to the frequencies of the two tones:
f
L
≈ f
U
or Δf = f
U
– f
L
<< f
L
A nonlinear behavior of the DUT causes emissions at frequencies which correspond to sums and
differences of the upper and lower tone frequencies and their integer multiples. These intermodulation
products can be in the vicinity of the upper and lower tone frequencies, provided that their order is odd.
The analyzer measures the intermodulation products of k
th
order IMk (where k = 3, 5, 7, 9) at the lower
tone frequency minus (k – 1)/2 times the tone distance and at the upper tone frequency plus (k – 1)/2
times the tone distance. For an R&S ZVA analyzer that is equipped with option R&S ZVA<frequency>-
B16, Direct Generator/Receiver Access, a test setup of the following type is recommended:
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