System Overview
R&S
®
ZVT
87
Getting Started 1300.0045.62 ─ 10
Option
Option Name
Functionality
R&S ZVT20-B21/23
Generator Step Attenuators for
port 1/port 3
(R&S ZVT20 only)
Control the source power, e.g. to protect sensitive DUTs from
excess input levels.
R&S ZVT20-B32/34
Receiver Step Attenuators for port
2/port 4
(R&S ZVT20 only)
Control the received power, e.g. to avoid damage to the ana-
lyzer.
The following sections provide a short introduction to the software options.
3.5.1 Time Domain (R&S ZVAB-K2)
The network analyzer measures and displays complex S-parameters and other quanti-
ties as a function of the frequency. The measurement results can be filtered and math-
ematically transformed in order to obtain the time domain representation, which often
gives a clearer insight into the characteristics of the DUT.
Time domain transforms can be calculated in band pass or low pass mode. For the lat-
ter the analyzer offers the impulse and step response as two alternative transformation
types. A wide selection of windows can be used to optimize the time domain response
and suppress sidelobes due to the finite sweep range. Moreover, it is possible to elimi-
nate unwanted responses by means of a time gate and transform the gated result back
into the frequency domain.
3.5.2 Arbitrary Generator and Receiver Frequencies (R&S ZVA-K4)
Measurements at arbitrary (not necessarily equal) generator and receiver frequencies
provide a wealth of applications, e.g. intermodulation measurements vs. frequency and
power, hot S-parameter measurements.
For intermodulation distortion measurements, the analyzer provides a measurement
and calibration wizard. Intermodulation products and intercept points of order 3, 5, 7, 9
can be measured at the input and at the output of the DUT.
The frequency conversion option also includes mixer and harmonics measurements.
3.5.3 Arbitrary Gen. and Rec. Frequencies (R&S ZVA-K4)
RF mixers convert an RF signal at one frequency into a signal at another frequency.
The frequency that is to be shifted is applied at the RF input and the frequency shifting
signal (from a local oscillator, LO) is applied to the RF mixer's LO port, resulting in an
output signal at the mixer's Intermediate Frequency (IF) port.
For a given RF signal, an ideal mixer would produce only two IF outputs: one at the
frequency sum of the RF and LO (IF = RF + LO), and another at the frequency differ-
ence between the RF and LO (IF = |RF – LO|). Filtering can be used to select one of
these IF outputs and reject the unwanted one.
Optional R&S ZVT Extensions
