SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)
SA Mode Settings
Setting the Audio Capture Playback Softkeys
The FieldFox analog demodulation audio capture playback feature allows you
to capture/record the demodulated audio associated with an analog
demodulation measurement (AM DSB, AM SSB, FM, FM Stereo or PM) and
save it as an audio file. It also allows you to recall and playback audio files
through FieldFox's built-in speaker or headphones.
When Analog Demod is selected, you can choose from the following:
—Press Meas Setup 4
> More > Audio Capture Playback then
— If you want to initiate an audio capture:
Press Capture
— If you want to stop an audio capture:
Press Stop
to stop the current capture of audio data and depending on the
timing of pressing Stop, possibly prevent the audio data from being stored.
— If you have previously stored an audio file:
Press Playback
then
— Play
– to play the last current audio file (*.wave) loaded into memory.
— Stop
– to disable playback of the current audio file.
— Volume 0
– to enable disable volume and to adjust the volume from
0 to 100 (default = 50).
— Load Audio File
– to load a previously stored audio (.wave) file.
— Cap Auto–Load File
– enable/disables automatically loading of a
captured audio (.wav) file (default = OFF).
—Press Capture Settings
then
— Capture Count
– sets the number of audio captures for a
measurement (Default = 1; Settable: 1 to 10K).
— Capture Time
– sets the capture time (Default = 100 ms).
Minimum/Maximum capture times vary with other settings.
— Stereo Channel
– When Demod Type = FM Stereo / RDS, this
softkey sets the type of audio to be captured and stored: (Choose
single channel: Mono (L+R
), Left (L), Right (R), and Difference (L–R).
Or choose two channel: Stereo (L&R)
. Default = Mono (L+R).
Currently, the audio capture playback feature supports WAVE files with
mono or stereo LPCM data sampled at 48,000 Hz with 16 bits per sample.
If you are unable to hear your audio data files (*.wav), verify that your
System > Preferences > Preferences > Audio is set to On.
Keysight N9938-90003 User's Guide
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