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Press Log / Linear to select the AM operating mode.
When Internal AM is active, the AM Depth display
will reflect your selection as XX dB (Log) or XX %
(Linear). When External AM is active, the AM Sen
-
sitivity display will reflect your selection as XX dB/V
(Log) or XX %/V (Linear).
Press < Previous to return to the AM Status menu
display.
External AM Source
To provide amplitude modulation of the output sig
-
nal using a modulating signal from an external
source, first set up the external signal generator and
connect it to the MG369XB rear panel AM IN con
-
nector.
Next, access the AM Status menu (page 3-93) and
press Internal / External to select the external source
for the modulating signal.
The External AM Status menu (below) is then dis-
played.
This menu contains the external AM status window
that shows the current menu selections and the
measured AM Depth (The AM depth measurement
function measures the voltage of the external modu
-
lation signal and calculates the percentage modula
-
tion value). The menu lets you perform the
following:
q
Turn the selected AM mode On or Off
q
Edit the AM Sensitivity
q
Select the modulating signal source
q
Select the Linear AM or Log AM operating
mode
MG369XB OM 3-95
Local (Front Panel) Operation Signal Modulation