To Set The Am Depth Of The Variable Phase Signal (Var Freq); To Set The Frequency Of The Sub-Carrier Signal (Subcarrier Freq); To Set The Sub-Carrier Am Depth That Modulates The Vor Carrier - Keysight Technologies N5171B EXG User Manual

Avionics VOR/ILS (Option 302)
Using VOR [VHF Omnidirectional Range] Softkeys
amplitude modulated onto one of the VOR carriers (108.00 to 117.95 MHz).
This makes the reference signal essentially an FM/AM multiplex signal.

To set the AM depth of the variable phase signal (VAR Freq)

1. Press Aux Fctn > Avionics > VOR
2. Press REF/VAR
3. Press VAR Depth
(Default value is 30%.)
4. Select a value from 0 to 49.9% and press Enter.
Enter a value in percentage to set the AM depth of the variable phase signal
(VAR Freq).

To set the frequency of the sub-carrier signal (SubCarrier Freq)

This process sets the frequency of the sub-carrier for a VOR signal.
1. Press Aux Fctn > Avionics > VOR
2. Press REF/VAR
3. Press SubCarrier Freq
(Default value is 9960 Hz.)
4. Select a value in Hz | kHz | MHz | GHz from 0 Hz to 20 kHz.
The 30 Hz reference signal (REF Freq) is placed on a sub-carrier of 9960 Hz
(SubCarrier Freq) using frequency modulation with a peak deviation set to
480 Hz (REF Deviation). This frequency modulated sub-carrier is then
amplitude modulated onto a VOR carrier (108.00 to 117.95 MHz). This makes
the reference signal essentially an FM/AM multiplex signal.

To set the sub-carrier AM depth that modulates the VOR carrier

1. Press Aux Fctn > Avionics > VOR
2. Press REF/VAR
3. Press SubCarrier Depth
(Default value is 30%.)
4. Select a value from 0 to 49.9% and press Enter.
Enter a value in percentage to set the Sub-carrier AM depth as it modulates
the main carrier of a VOR signal.
Sub-carrier AM depth is typically 30%, but can range from 0 to 49.9%.
120 Keysight EXG and MXG X-Series Signal Generators User's Guide