Configuration
R&S
®
FSW-K40
42
User Manual 1173.9286.02 ─ 15
AM Rejection
Turns the suppression of AM noise on and off.
If on, the application suppresses the AM noise that the signal contains in order to dis-
play phase noise as pure as possible.
AM rejection is available for the I/Q sweep mode.
Remote command:
Max Freq Drift
Defines the minimum bandwidth or sample rate used in the signal processing to
increase the probability of capture drifting signals.
The tracking bandwidth is valid for all half decades measured in I/Q mode.
Remote command:
Digital PLL
Turns an additional frequency correction based on the I/Q data on and off.
If on, the application is able to track frequency changes during the I/Q data capture that
would otherwise fall into the half decade measurement bandwidth (see
).
The digital PLL works for all half decades measured in I/Q mode.
Remote command:
Decimation
Turns decimation on and off.
When you turn on decimation, the samples that have already been used for a given
half decade are resampled in lower half decades. Reusing these samples results in
lower measurement times in the lower half decades, because less samples have to be
recorded there.
To get valid results for lower offset frequencies, make sure to use an appropriate sam-
ple rate.
This feature is especially useful when you are measuring half decades with very low
offset frequencies.
Using decimation is available for the "I/Q FFT" sweep mode.
Remote command:
Online I/Q
Turns the online measurement mode for I/Q measurements on and off.
When you turn the online measurement mode on, the application records smaller
amounts of data at a time. It is thus able to process that data faster, because it does
not have to wait until the I/Q capture buffer is full, before processing the data.. The
result is that the measurement results are updated faster.
Controlling the Measurement
