System Overview
R&S
®
ZVA
94
Quick Start Guide 1145.1090.62 ─ 10
signal can be provided either by a second analyzer port or by an external generator. The
down-converted signals are fed to the REF IN and MEAS IN input connectors of the
analyzer port providing the RF source signal.
Option R&S ZVA-K8 also comprises option ZVA-K4, Frequency Conversion.
3.5.8 Mixer Delay w/o LO Access (R&S ZVA-K9)
Measurement of the absolute or relative group delay of a mixer. The mixer delay mea-
surement is an extension of the scalar mixer measurement: The network analyzer gen-
erates a two-tone RF signal as a mixer input signal and measures the converted IF signal
at the mixer output. The mixer delay is derived from the relative phases of the two-tone
signals at the mixer input and the mixer output.
Compared to conventional measurement methods, the mixer delay measurement offers
several additional advantages.
●
No external mixers are needed.
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A network analyzer with standard functionality is sufficient, see description of test
setups below.
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Easy calibration using a calibration mixer.
3.5.9 Long Distance Mixer Delay (R&S ZVA-K10)
The mixer delay measurement can be performed with two different R&S ZVA or R&S ZVT
network analyzers, one providing the source ports, the other the receive port. The two
instruments can communicate with each other via LAN using LXI event messages. This
can be advantageous e.g. for measurements on DUTs with large dimensions where the
connection to a single instrument would require very long RF cables.
3.5.10 Internal Pulse Generators (R&S ZVA-K27)
Provides two independent control signals at the CASCADE output connector on the rear
panel of the network analyzer. The signals can be used to control an R&S ZVAXxx
Extension Unit equipped with a pulse modulator option.
3.5.11 Noise Figure Measurement (R&S ZVAB-K30)
Provides the noise figure of a DUT which operates in its linear range. The noise figure of
a device is the ratio of the output signal-to-noise ratio (SNR) to the input SNR, provided
that a thermal noise signal is fed to the input. It is a measure of the degradation of the
SNR caused by the device.
The method of measurement offers several advantages:
●
No additional noise source is required.
●
The result can be obtained in a single sweep.
Optional R&S ZVA Extensions
