R&S ZVB - Page 330

R&S
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ZVA / R&S
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ZVB / R&S
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ZVT GUI Reference
Channel Menu
Operating Manual 1145.1084.12 – 30 315
analyzer (at one of the ports that are not used for the RF and IF signals) or by an external source.
A test setup with two mixers involves two independent LO signals at both mixers.
 The IF signal is the mixer output signal (mixing product), which is at one of the following
conversion frequencies: IF = LO + RF or IF = |LO – RF|, i.e. LO – RF (for LO > RF) or IF = RF –
LO (for RF > LO). The IF frequency is selected in the Define Frequencies... dialog. A test setup
with two mixers involves two independent conversion settings (see Test Setup with Two Mixers).
The signal description above with the swept RF signal and the LO signal at a fixed frequency
corresponds to the default configuration. In the Define Frequencies dialog, you can select any of the
signals as a Sweep/CW signal. You can set the frequency range for this signal via Start/Stop or CW
Frequency. A second signal is at a Fixed frequency, and the third at the calculated sum or difference
frequency (Auto).
The labeling of the complete diagrams depends on the sweep type.
 Frequency sweep
The following mixer signal diagram corresponds to a frequency sweep:
 RF signal (left side): Analyzer port number (e.g. Port 1), frequency sweep range (or fixed
frequency, if the LO signal is swept), CW power, frequency conversion settings (1 / 1
denotes no conversion).
 LO signals (1 or 2, from below): Signal source (analyzer port or external generator), fixed
power and frequency (or frequency sweep range, if the RF signal is at fixed frequency),
frequency conversion settings.
 IF signal (right side): Analyzer port number (e.g. Port 2), frequency range = (sweep range
+ LO) or |sweep range – LO|, expected fixed power.
 Power sweep
The following mixer signal diagram corresponds to a power sweep:
 RF signal (left side): Analyzer port number (e.g. Port 1), power sweep range or fixed
power, CW frequency, frequency conversion settings (1 / 1 denotes no conversion).
 LO signals (1 or 2, from below): Signal source (analyzer port or external generator), fixed
power or power sweep range, CW frequency, frequency conversion settings.