Glideslope Specifications; Table 1-8 Glideslope Specifications - Garmin GTR 225 Installation Manual

1.7

Glideslope Specifications

Characteristics
Sensitivity
Centering accuracy
Selectivity
Standard deflection
Flag
190-01182-02
Rev. F

Table 1-8 Glideslope Specifications

-87 dBm or less for 60% of standard deflection
0 ±0.01183 ddm or 0 ±10.14 mV
The course deviation is 0 ddm, .0091 ddm 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
With a standard deflection FLY DOWN condition (90 Hz
dominant), the output is -78 mV ±7.8 mV
With a standard deflection FLY UP condition (150 Hz dominant),
the output is +78 mV ±7.8 mV
The unit flags in the event of any of the following conditions:
• The RF level of a standard glideslope deviation test signal is
such that the deflection of the deviation indicator is less that
50% of the standard deflection
• Absence of 150 Hz modulation
• Absence of 90 Hz modulation
• Absence of both 90 Hz and 150 Hz modulations
• Absence of RF signals
Specifications
GTR 225/GNC 255 TSO Installation Manual
Page 1-8