Loc Specifications; Table 1-7 Loc Specifications - Garmin GTR 225 Installation Manual

1.6

LOC Specifications

Characteristics
Receiver audio sensitivity
Course deviation sensitivity
Flag
AGC characteristics
Selectivity
Standard deflection
Spurious response
Centering accuracy
Audio output
Audio response
Audio distortion
190-01182-02
Rev. F

Table 1-7 LOC Specifications

At -103.5 dBm (S+N)/N is not less than 6 dB
At -103.5 dBm, deviation output is not to be less than 60% of
standard deflection when a LOC deviation test signal is applied
The LOC Course Deviation Flag indicates in the event of any of
the following conditions:
• The RF level of a standard LOC deviation test signal is such
that the deflection of the deviation indicator is less than 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
From -99 dBm to -13 dBm input of a standard localizer audio test
signal, audio output level does not vary more than 3 dB
6 dB BW is greater than 9 kHz
69 dB BW is less than 36 kHz
With a standard deflection FLY LEFT condition (90 Hz dominant),
the output is +90 mV ± 9 mV.
With a standard deflection FLY RIGHT condition (150 Hz
dominant), the output is -90 mV ± 9 mV
Greater than 60 dB
0 + 0.01023 ddm or 0 + 9.9 mV
A minimum 100 mW into a 500  load
Less than 6 dB of variation between 350 and 2500 Hz
In voice mode, an IDENT tone of 1020 Hz Ident Tone is attenuated
at least 20 dB down
The distortion in the receiver audio output does not exceed 10% at
all levels up to 100 mW
GTR 225/GNC 255 TSO Installation Manual
Specifications
Page 1-7