Garmin GPS 400W, GNC 420W Installation Manual page 20

1.4.7 Glideslope Specifications (GNS 430W Only)
Sensitivity
Centering Accuracy
Selectivity
Standard deflection
Flag
Page 1-8
Rev. E
-87 dBm or less for 60% of standard deflection.
0 ± .0091 ddm or 0 ± 7.8 mV
The course deviation shall be 0 ddm ± .0091ddm when using
the Glideslope Centering Test Signal as the RF frequency is
varied ±17 kHz from the assigned channel.
At frequencies displaced by ±132 kHz or greater, the input
signal is at least 60 dB down.
a) With a standard deflection 'FLY DOWN' condition (90
Hz dominant), the output shall be -78 mV ± 7.8 mV.
b) With a standard deflection 'FLY UP' condition (150
Hz dominant), the output shall be +78 mV ± 7.8 mV.
The unit Flags:
a) When the level of a standard deviation test signal
produces 50% or less of standard deflection of the
deviation indicator.
b) In the absence of 150 Hz modulation.
c) In the absence of 90 Hz modulation.
d) In the absence of both 90 Hz and 150 Hz modulation.
e) In the absence of RF.
400W Series Installation Manual
190-00356-02