VNA0440
–
VNA0440e
VNA0460
–
VNA0460e
user manual V3.1
- 33 -
Generator
The most used settings in a VNA are of the frequency generator and most of the time it a
frequency sweep.
In the Generator panel you choose start- and stop frequency and the number of steps. The
number next to the
steps-field
indicates the step size in MHz.
Setting a too high a generator power may overdrive the circuit under test, giving
unpredictable results. This is especially true for amplifier circuits, which boost the power
to an even higher level.
A generator level that is too low will affect dynamic range.
Warning: When measuring amplifiers or generators, make sure that the total power
to one of the VNA ports does not exceed its absolute maximum rating of 20dBm
input power.
Detector
The Detector panel allows setting the input attenuator for the two detector channels. The
measurement power range of the detectors is
up to 0dBm
. With the input attenuators this
range can be extended.
Warning: These settings do not change the absolute maximum power rating of
20dBm
.
The
Speed
option allows making a choice between fast sweeping with higher noise levels
or slow sweeping with lower noise and better accuracy. The measurement speed for Slow
/ Medium / Fast are approximately 4 / 2 / 1 ms per point respectively.
