User`s guide

Key Reference 5
N9340B User’s Guide 129
AM
Key access: [SPAN] > {Demod} > {AM}
Pressing {AM ON} activates the AM demodulation
and turns off FM demodulation (if it is on).
FM
Key access: [SPAN] > {Demod} > {FM}
Pressing {FM ON} activates the FM demodulation
and turns off AM demodulation (if it is on). For
non- zero spans, a 100 kHz resolution bandwidth is
used during the demodulation, regardless of the
screen annotation. When the span is set to zero
span, the displayed bandwidth is used. For best
results, move the signal to be demodulated to
within 3 divisions of the top of the display.
Speaker Vol
Key access: [SPAN] > {Demod} > {Speaker Vol}
Selecting AM or FM turns the speaker on. Press
this softkey and rotate the knob to adjust the
internal speaker volume.
Delay Time
Key access: [SPAN] > {Demod} > {Speaker Vol}
Allows you to set the time, in non- zero spans, to
pause and demodulate the signal after each sweep.
The demodulated signal can be heard during
demodulation. In zero span, demodulation is
performed (and can be heard) throughout the
sweep.
With non- zero spans, in AM the Video BW is set to
3 kHz and the Resolution BW is set to 10 kHz. In
FM, the Video BW is set to 30 kHz and the
Resolution BW is set to 100 kHz.
When AM or FM demod is enabled, the instrument
will tune to the marker frequency and wait for the
Demod to take place. Delay Time is not available
unless AM or FM demod is selected, and span is >0