Keysight EXG and MXG X-Series Signal Generators User’s Guide
115
Avionics VOR/ILS (Option 302)
Using VOR [VHF Omnidirectional Range] Softkeys
When using an X-Series signal generator with Option 302 Avionics License to
simulate VOR signals, 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 one of the VOR carriers (108.00
to 117.95 MHz). This makes the reference signal essentially an FM/AM
multiplex signal.
Figure 5-3
VOR Softkeys
When testing a VOR system, the following VOR parameters can be set:
- Turns
on
the VOR
carrier and variable
phase signal
- Turns
on
all
VOR modulation
and VOR carrier
- Turns
on
only the
sub-carrier
- Turns
on
the sub-carrier
modulated with the
reference signal
- Sets the Bearing angle
FROM the VOR station
- Sets the Bearing
direction as either
From or To
the VOR station
- Sets the frequency of
the reference signal and
variable phase signal
- Sets the amount of
FM deviation the 30 Hz
reference signal applies
on the sub-carrier
- Turns
off
all
VOR modulation;
VOR carrier remains
on
.
- Sets AM depth of the
variable phase signal
- Sets the frequency of
the sub-carrier
- Sets the AM depth of
the sub-carrier as it
modulates the main carrier
- Sets a Carrier Frequency by selecting an Index from 1 to 160.
(Default: Index is 1 and corresponds to 108.00 MHz)
VOR Menu
Parameters
Default State
VOR Mode
OFF
Carrier Freq Index
1
108.00 MHz
Bearing menu
Angle
0.00 Deg
Direction
From
REF/VAR menu
REF/VAR Freq
30.00 Hz
REF Deviation
480.0 Hz
VAR Depth
30.0%
SubCarrier Freq
9.96000 kHz
SubCarrier Depth
30.0%
COM/ID menu
a
a. For information on the COM/ID menu,
