Service Manual

Page 1.22
2 ~ SERVICE PHILOSOPHY
1.7.3
Receiver ETS AS4295
Sensitivity
≤0.5µV PD (-113dBm) for 20dB
SINAD
≤0.3µV PD (-117.5dBm) for 12dB SINAD
≤0.5µV PD (-113dBm) for 20 dB Quieting.
Adjacent Channel
Selectivity
25kHz Channel Spacing: >73dB
12.5kHz Channel Spacing: >60dB
25kHz Channel Spacing: >73dB
12.5kHz Channel Spacing: >65dB
Intermodulation Rejection
>65dB >70dB
Spurious Response
Rejection
>70dB >73dB
Blocking
>95dB >95dB
Conducted Spurious
Emissions
<2nW (-57dBm) - 9kHz to 1GHz
<20nW (-47dBm) - 1GHz to 4GHz
<20nW (-47dBm) - 9kHz to 4GHz
GENERAL
FM Residual Noise
(CCITT weighted)
25kHz Channel Spacing: >45dB
12.5kHz Channel Spacing: >40dB
Mute Range
Typically 6dB to 25dB SINAD
Typical setting 10dB to 12dB SINAD
Mute Response Time
<30mS (no CTCSS)
Add 200mS for CTCSS
Voting Response Time
Searches at 50ms/channel
Audio Distortion
500mW into 16Ω at <5% distortion
Audio Frequency
Response
300 to 3000Hz*: +1dB to -3dB
Figures apply for a flat audio response or a 6dB/octave de-emphasis curve
(*2550Hz for 12.5kHz channel spacing)
Deviation Sensitivity
(For rated audio at 1kHz)
20% MSD±3dB