Keysight EXG and MXG X-Series Signal Generators User’s Guide 381
Using Avionics VOR/ILS Softkeys for N5171B/72B and N5181B/82B with Option 302
Using ILS Glide Slope Softkeys
To set the ILS Glide Slope carrier frequency
1. Press Aux Fctn > Avionics > ILS Glide Slope
2. Press Carrier Freq Index
(Default <value> is 1 and corresponds to 334.70 MHz.)
3. Select a <value> from 1 to 40 (see table) and press Enter.
There are forty channels that are allocated to the ILS Localizer at 50 kHz
spacing in the range from 108.10 - 111.95 MHz; each ILS Localizer carrier has
a corresponding ILS Glide Slope carrier frequency in the range from 329.15 -
334.70 MHz.
Since VOR [VHF Omnidirectional Range] systems range from 108.00 to
118 MHz, this frequency range overlaps with the ILS Localizer carrier
frequency range from 108.10 - 111.95 MHz; to allow ILS and VOR systems to
share this frequency range, only frequencies where the first decimal is odd (like
the following examples: 108.10, 108.15, 108.30, 108.35...) are used as
ILS Localizer carriers.
The default ILS Glide Slope carrier frequency Index is 1 and corresponds to
334.70 MHz.
ILS Localizer and Corresponding ILS Glide Slope
Carrier Frequencies (MHz)
ILS
Localizer
Index 1-20
ILS Glide
Slope
Index 1-20
ILS
Localizer
Index 21-40
I
LS Glide
Slope
Index 21-40
1=108.10 1=334.70 21=110.10 21=334.40
2=108.15 2=334.55 22=110.15 22=334.25
3=108.30 3=334.10 23=110.30 23=335.00
4=108.35 4=333.95 24=110.35 24=334.85
5=108.50 5=329.90 25=110.50 25=329.60
6=108.55 6=329.75 26=110.55 26=329.45
7=108.70 7=330.50 27=110.70 27=330.20
8=108.75 8=330.35 28=110.75 28=330.05
9=108.90 9=329.30 29=110.90 29=330.80
10=108.95 10=329.15 30=110.95 30=330.65
11=109.10 11=331.40 31=111.10 31=331.70
12=109.15 12=331.25 32=111.15 32=331.55
13=109.30 13=332.00 33=111.30 33=332.30
14=109.35 14=331.85 34=111.35 34=332.15
15=109.50 15=332.60 35=111.50 35=332.90
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