GW Instek MFG-2000 Series - Selecting (FM) Modulation Source

MODULATION
139
Selecting (FM) Modulation Source
The function generator will accept an internal or external source for
FM modulation. The default source is internal.
Panel Operation
1. Press the MOD key.

2. Press F2 (FM).


3. Press F1 (Source).


4. To select the source, press F1
(Internal) or F2 (External).


~
EX

5. Press Return to return to the
previous menu.

External Source
Use the MOD INPUT terminal
on the rear panel when using an
external source.
42V
MAX
MOD
Note
If an external modulating source is selected, the
frequency deviation is determined by a ± 5V signal
input into the MOD INPUT terminal on the rear
panel. The frequency deviation is proportional to
the voltage of the modulation source. For example,
if the voltage of the modulation source is +5V, then
the frequency deviation would be equal to the set
frequency deviation. Lower voltages levels reduce
the frequency deviation while negative voltage
levels produce frequency deviations with
frequencies below the carrier waveform.