User Manual 43
described in "Specifications".
5.5.4 Modulating Waveform Source
Press Mod -> Source to select Internal (default) or External as the modulation source.
Internal Source
When internal modulation source is selected, the modulating waveform is set as a Square with
50% duty cycle, and the rate at which the output amplitude "shifts" between "carrier amplitude"
and "modulating amplitude" is determined by "2ASK Rate".
External Source
With the External source, the generator receives the external modulating signal from the
[Sync/Mod/Trig] connector at the pront panel.
Note: The [Sync/Mod/Trig] connector is different when controlling 2ASK and AM/FM/PM
modulations externally. In 2ASK modulation, the [Sync/Mod/Trig] connector has adjustable edge
polarity.
5.5.5 2ASK Rate
When internal modulation source is selected, the 2ASK Rate is the rate at which the output
amplitude shifts between "carrier amplitude" and "modulating amplitude". Press Rate to set.
Use the numeric keyboard or direction keys and knob to input the desired frequency value.
The frequency range is from 2mHz to 1MHz and the default is 100Hz.
Note: This menu will be grayed out and disabled when the external modulation source are
selected.
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