Garmin GNS 530W, Installation Manual

Page: 18 / 216

Page 1-6 500W Series Installation Manual
Rev. D 190-00357-02
1.4.4 COM Transceiver Specifications (GNS 530W Only) **
Audio Output 100 mW minimum into a 500
Ω
load.
Audio Response
Less than 6 dB of Variation between 350 and 2500 Hz.
Audio Distortion
The distortion in the receiver audio output does not exceed
15% at all levels up to 100 mW.
AGC Characteristics
The audio output does not vary by more than 6 dB when the
level of the RF input signal, modulated 30% at 1000 Hz, is
varied from 5
μ
V to 450,000
μ
V.
Sensitivity (S+N)/N on all channels is greater than 6 dB when the RF
level is 2
μ
V (hard) modulated 30% at 1000 Hz at rated audio.
Squelch
2
μ
v
±
6 dB for 25 kHz channels.
3
μ
v
±
6 dB for 8.33 kHz channels.
Selectivity 6 dB BW is greater than
±
8 kHz for 25 kHz channeling.
60 dB BW is less than ±25 kHz for 25 kHz channeling.
6 dB BW is greater than ±2.778 kHz for 8.33 kHz channeling.
60 dB BW is less than ±7.37 kHz for 8.33 kHz channeling.
Spurious Response
Greater than 85 dB.
Transmitter Power At least 10 Watts*, 16 watts for “AW” models.
Transmitter Duty Cycle Recommended 10% maximum.
Modulation Capability
The modulation is not less than 70% and not greater than
98% with a standard modulator signal applied to the
transmitter.
Carrier Noise Level At least 45 dB (S+N)/N.
Frequency Stability
0.0005%
Demodulated Audio Distortion
Less than 10% distortion when the transmitter is modulated at
least 70%.
Sidetone 1.4 V
RMS
into a 500
Ω
load when the transmitter is modulated
at least 70%.
Demodulated Audio Response Less than 6 dB when the audio input frequency is varied from
350 to 2500 Hz.
* C37d Class 4 & 6 may not provide suitable COM transmit range for some high-altitude aircraft.
** Specifications shown apply at nominal input voltages of 14 VDC or 28 VDC, as applicable, and with
a nominal 50 ohm resistive load at the antenna connector.