Receiver; Self-Quieting Frequencies - Motorola GM1200E Service Manual

Technical Specifications
6.3

Receiver

Channel Spacing
Sensitivity @ 12.5kHz or 20/25kHz
Intermodulation
Adjacent Channel Selectivity
Spurious Rejection
Audio Distortion @ Rated Audio
Hum and Noise (CCITT)
Audio Response (300 - 3000 Hz)
Co-channel Rejection
Conducted /Radiated Emission
Receive after transmit time
Audio Output Power
6.4

Self-Quieting Frequencies

Self-quieting frequencies are frequencies that are also generated by the radio and cause internal
interference. On these frequencies the interference caused by the self-quieter spur is great enough
that a radio will not meet its receiver sensitivity specification.
The frequencies are: UHF 403.2, 420, 436.8 and 453.6MHz.
1-6
SPECIFICATION ITEM
VHF 151.2 and 168MHz.
TYPICAL VALUE
12.5kHz or 20/25kHz
< 0.35 µ V (12dB SINAD)
>65dB ETS; >70dB with Base Option
>60dB (12.5kHz); >70dB (20/25kHz) ETS
>70dB ETS
<5%
>40dB (12.5kHz); >45dB (20/25kHz) CCITT
Flat or De-Emphasised
<12dB (12.5kHz); <8dB (20/25kHz) ETS
<2nW (0,1..1000MHz); <20nW (1..4GHz)
<25msec
<13W external
General