Page 4-6
G900X/G950 Installation and Maintenance Manual – GIA 63W
Revision D
190-00719-00
4.2.4 LOC
Specifications
Table 4-4. GIA 63W LOC Specifications
Characteristics Specifications
Receiver Audio Sensitivity
At -103.5 dBm (S+N)/N shall not be less than 6 dB.
Course Deviation Sensitivity
At –103.5 dBm, deviation output shall not be less than 60%
of standard deflection when a LOC deviation test signal is
applied.
Flag
The VLOC Course Deviation Flag must be flagged:
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.
AGC Characteristics
From –99 dBm and –13 dBm input of a Standard VOR
Audio Test Signal, audio output levels shall not vary more
than 3 dB.
Selectivity
6 dB BW is greater than 9 kHz.
69 dB BW is less than 36 kHz.
Standard Deflection
a) With a standard deflection ‘FLY LEFT’ condition (90 Hz
dominant), the output shall be +90 mV ± 9 mV.
b) With a standard deflection ‘FLY RIGHT’ condition (150 Hz
dominant), the output shall be -90 mV ± 9 mV.
Spurious Response
Greater than 60 dB.
Centering Accuracy
Typical 0
±
3 mV (Max error 9.9 mV per RTCA DO-195).
Audio Output
A minimum 100 mW into a 500
Ω
load.
Audio Response
Less than 6 dB of Variation between 350 and 2500 Hz. In
voice mode, an ident tone of 1020 Hz shall be attenuated at
least 20 dB.
Audio Distortion
The distortion in the receiver audio output shall not exceed
10% at all levels up to 100 mW.