Instrument Function > Modulation > Amplitude Modulation (AM) > Amplitude Modulation Settings
Amplitude Modulation Settings

To open the "Amplitude Modulation" dialog, select "Modulation > Configure > Amplitude Modulation" or use the MENU key under "Modulation".

In the upper section of the dialog, the modulation source is selected and the modulation switched on. The modulation source can be selected independently for the different modulation types and the LF output.

The configuration of the selected external or internal modulation source is performed in the lower section of the dialog or in the "LF Output" dialog (internal source only).

These settings affect all modulations which use the same modulation source.

State

Activates amplitude modulation.

Remote command: 
 
AM Source

Selects the source for the AM modulation signal.

The source can be selected independently for the different modulation types and the LF output. The configuration of the selected external and/or internal modulation source is performed in the lower section of the dialog or in the "Mod Gen" block (internal source only).

"Internal"

Uses the internal LF generator as modulation signal source for AM.

"External"

Uses an externally applied modulation signal.

The external signal is input via the MOD EXT connector.

Remote command: 
 
AM Depth

Sets the modulation depth in percent.

Remote command: 
 
LF Gen Freq

Sets the frequency of the LF generator.

This setting affects all analog modulations which use the LF generator as the internal modulation source.

Remote command: 
 
AM Sensitivity

Displays the input sensitivity of the externally applied modulation signal at the MOD EXT input in %/V.

The modulation depth entered under "AM Depth" is achieved with 1 Volt modulation of the input.

Remote command: 
 
AM External Coupling

Selects the coupling mode (AC or DC) for external feed.

Note: Coupling for external feed via input MOD EXT can be set independently for all modulations using the external modulation signal.

"AC"

Disconnects the DC voltage component and uses only the AC component of the modulation signal.

"DC"

Uses the modulation signal with both components, AC and DC.

Remote command: 
 
Ext. Impedance

(Source "External" only)

Sets the impedance for the external modulation signal, applied at the MOD EXT connector.

You can select 600 Ohm or high (>100 kOhm).

This setting affects all analog modulations which use the external modulation signal.

Remote command: 
 

 


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