Keysight N9913B, Руководство пользователя

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Keysight N9938-90006 User’s Guide 179
SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)
SA Mode Settings
— Highpass Filter None – then choose:
— HPF 3 dB Cutoff 500.000 Hz – When the Highpass Filter is set to
Custom , sets the customized HPF 3 dB cutoff frequency for the
highpass filter (Default = 500 Hz; Minimum = 20 Hz, Maximum =
Varies, depending on the AF Span).
— Bandpass Filter None – Sets the Bandpass Filter for the current
measurement (Choices: None, CCITT, A-Weighted, C-Weighted,
C-Message, CCIR-1k Weighted, CCIR-2k Weighted, or CCIR
Unweighted). Default = None.
— More – FM and FM Stereo only . Opens a softkey menu to
enable/disable the De-Emphasis softkeys.
—— De-Emphasis OFF ON – Enables/disables the de-emphasis
applied to the demodulated signal.
—— De-Emphasis T – Sets the amount of de-emphasis applied to
the demodulated signal.
Setting the Marker Counter Gate Softkey
When AM Metric or FM Metric are selected, you can choose from the
following:
— Press Marker > Peak
— Press Mkr->/Tools > More > Mkr Properties > Counter Gate – Sets the AM
or FM Tune & Listen demodulated signal’s counter window time
(Minimum = 1 ms and Maximum = 2s; default = 100 ms).
The Counter Gate softkey is
not available when AM Tune & Listen, FM
(narrow) Tune & Listen, or FM (wide) Tune & Listen are enabled. Refer to
Figure 9-9 on page 182 .
None
No highpass filter is selected.
20 Hz
2-Pole Butterworth HPF with 3 dB cutoff frequency
of 20 Hz.
50 Hz
2-Pole Butterworth HPF with 3 dB cutoff frequency
of 50 Hz.
300 Hz
2-Pole Butterworth HPF with 3 dB cutoff frequency
of 300 Hz.
400 Hz
10-Pole Butterworth HPF with 3 dB cutoff
frequency of 400 Hz.
Custom
5-Pole Butterworth HPF with a custom 3 dB cutoff
frequency (determined by the HPF 3 dB Cutoff
setting).