4.10 External AM modulation
Fig 22
The External amplitude modulation has no parameter
setup menu. Selecting extam in the
Mode
menu enables the
External modulation input located on the rear panel of the
instrument. The modulating waveform from an external signal or
function generator can be applied to this input.
The carrier signal frequency, amplitude and waveform is
set with the
WaveF
,
Freq
and
Amp
buttons as explained on
pages 8 through 11. A 0.4V p-p signal will 100% modulate a
1Volt p-p carrier signal.
Note
: the auxiliary output waveform
maybe used as a modulating source.
4.11 Demo (B8040 FD only)
11. Lissajous pattern demonstration
Fig 23
In this mode the generator outputs the same frequency
sine wave on both the main output and the
B OUT
terminals
simultaneously. The frequency is set by the
Freq
button.
Set an oscilloscope to the X-Y mode and connect the main
output to the X input of the oscilloscope and the B OUT to the Y
input. Adjust the phase difference between the signals by
rotating the Encoder knob and observe the pattern on the
MODE: external AM
< extam demo
Phase=0
< extam demo
20
