Instrument Function > Modulation Generator and LF Output > LF Output > LF Output Dialog
LF Output Dialog
LF Output State

Activates the LF output. This setting has no effect on the modulations.

The modulation signal is output at the LF OUTPUT connector of the instrument.

Remote command: 
 
Display LF Gen Level as Voltage of EMF

Activates the display of the signal level as voltage of the EMF (no-load voltage). If this setting is deactivated, the level is displayed as a voltage over a 50 Ohm load (preset state).

Note: This setting is not affected by an instrument preset (PRESET key), *RST) or the "Save/Recall" function. Only the "Factory Preset" resets the setting.

Remote command: 

n.a.

 
Out Voltage

Sets the voltage (peak) of the LF output signal.

Remote command: 
 
Source

Selects the internal source to be used for the LF Output signal. The available selection parameters vary according to the fitted options.

Note: If an avionic modulation (VOR/ILS) is running, the source is not selectable, since the LF generator is allocated by the modulation.

To enable the source selection, deactivate the avionic modulation first.

"None"

Switches off all internal modulation sources.

"LFGen1 / LFGen2"

Selects one of the internal LF generators as the source for the LF Output signal.

"LFGen1+2"

Selects both internal LF generators as the source for the LF Output signal. LF frequency and output voltage can be set separately for the two LF generators. The added output voltage of the two modulation generators must not exceed the overall voltage.

"Noise"

Selects the internal noise signal. The LF output signal is white noise either with Gaussian distribution or equal distribution.

See also "Noise Settings".

"LFGen1+Noise / LFGen2+Noise"

Selects one LF generator and the noise signal as the source for LF Output.

Remote command: 
 
Out Voltage 1/2

(Source LFGen1+2 only)

Selects the output voltage for the two LF generators. The sum of the two values must not exceed the overall output voltage set in the upper part of the menu.

Remote command: 
 
LFGen 1/2 Freq

(Source LFGen1+2 only)

Sets the frequency of the two LF generators.

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

Note: VOR/ILS is indicated and setting the frequency is disabled if VOR/ILS modulation is activated.

Remote command: 
 
LF Gen Shape

Selects the waveform shape for the signal of the second LF generator. For trapezoidal shapes, the instrument also displays the time parameters required to configure the signal.

Remote command: 
 
Trapeze Rise

(Source LFGen2 only)

Selects the rise time for the trapeze shape of the second LF generator.

Remote command: 
 
Trapeze High

(Source LFGen2 only)

Selects the high time for the trapeze shape of the second LF generator.

Remote command: 
 
Trapeze Fall

(Source LFGen2 only)

Selects the fall time for the trapeze shape of the second LF generator.

Remote command: 
 
Trapeze Low

(Source LFGen2 only)

Selects the low time for the trapeze shape of the second LF generator.

Remote command: 
 
DC Offset

Sets a DC offset at the LF Output.

Remote command: 
 

 


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