Common measurement settings
R&S
®
FSVA3000/ R&S
®
FSV3000
460
User Manual 1178.8520.02 ─ 08
For R&S FSV/A3004, 3007, 3013, and 3030 models, the following settings are availa-
ble:
"Off"
Deactivates the preamplifier.
"15 dB"
The RF input signal is amplified by about 15 dB.
"30 dB"
The RF input signal is amplified by about 30 dB.
For R&S
FSV/A44 or higher models, the input signal is amplified by 30 dB if the pream-
plifier is activated. In this case, the preamplifier is only available under the following
conditions:
●
In zero span, the maximum center frequency is 43.5
GHz
●
For frequency spans, the maximum stop frequency is 43.5
GHz
●
For I/Q measurements, the maximum center frequency depends on the analysis
bandwidth:
f
center
≤
43.5
GHz - (<Analysis_bw> / 2)
If any of the conditions no longer apply after you change a setting, the preamplifier is
automatically deactivated.
Remote command:
Noise Cancellation
The R&S
FSV/A can correct the results by removing the inherent noise of the analyzer,
which increases the dynamic range.
In this case, a reference measurement of the inherent noise of the analyzer is carried
out. The measured noise power is then subtracted from the power in the channel that
is being analyzed (first active trace only).
The inherent noise of the instrument depends on the selected center frequency, resolu-
tion bandwidth and level setting. Therefore, the correction function is disabled when-
ever one of these parameters is changed. A disable message is displayed on the
screen. To enable the correction function after changing one of these settings, activate
it again. A new reference measurement is carried out.
Noise cancellation is also available in zero span.
For an active external frontend, noise cancellation is not available. See
●
RMS
●
Average
●
Sample
●
Positive peak
Remote command:
6.4.3
Scaling the y-axis
The individual scaling settings that affect the vertical axis are described here.
Access
: "Overview" > "Amplitude" > "Scale" tab
Amplitude and vertical axis configuration
