DUPLEX OPERATING
CURVES
The curves indicate the amount of
attenuation (isolation) required between a "typical" transmitter (50 watt)
and receiver to prevent greater than 1 dB reduction in a 12 dB SINAD ratio,
due to (1) transmitter noise and (2) receiver desensitization. As an
example, a 150 MHz duplex station – would require approximately 51 dB
attenuation of transmitter noise at the receive frequency, and approximately
48 dB receiver desensitization isolation (receiver isolation from the
transmitter carrier frequency).
CAUTION: These curves are typical
curves and should not be used when accuracy is desired. They are meant to
serve only as a guide. For exact requirements of a specific duplex station,
contact the manufacturer of the radio
equipment.
