S820E UG PN: 10580-00343 Rev. H 6-37
VNA Mode 6-15 Sweep Trigger Menu
IFBW
The following choices are available for the intermediate frequency bandwidth
setting:
RF Immunity
The instrument defaults to RF Immunity Low. When set to High, RF
Immunity protects the instrument from stray signals generated by nearby or
co-located transmitters that can affect frequency and distance domain DTF
measurements. The algorithm that is used to improve instrument ability to
reject unwanted signals may slow down the sweep speed if interferers are
detected. If the instrument is used in an environment where immunity is not
an issue, then the RF Immunity key can be set to Low to optimize sweep
speed. Use this feature with caution, because the introduction of an
interfering signal might be mistaken for a problem with the antenna or cable
run. If Immunity is set to Low during a normal measurement, then the
instrument will be more susceptible to interfering signals. Interfering signals
can make the measurement look better or worse than it really is.
100 kHz the maximum sweep speed
50 kHz
20 kHz
10 kHz
5kHz
2kHz
1 kHz default
500 Hz
200 Hz
100 Hz
50 Hz
20 Hz
10 Hz the maximum dynamic range
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