3
Technical Specification
RT4722
Duplex spurious resp. att. More than 70 dB
Duplex desensitation Below 3 dB
Intermodulation att. More than 68 dB
Co-channel rejection Better than -10 dB
Adj. ch. selectivity More than 70 dB
Blocking More than 90 dBµV
Transmitter
RF output power * High 25W + 0 dB to -0.5 dB
Low 0.9W +0.5 dB to - 1 dB
Adj. ch. power Below -70 dBc
Spurious radiation Below 0.25 µW
Cabinet radiation Below 0.25 µW
AF response + 6 dB/octave
Distortion Below 5%
Signal/noise ratio Better than 40 dB
DSC Facilities:
DSC operation According to Rec. ITU-R M.541-6
and Rec. ITU-R M.689-2
DSC protocol According to Rec. ITU-R M.493-7 class A
Navigator interface NMEA 0183, GGA,GLL,ZDA
NMEA input current 8mA type
Symbol error rate
below 1*10
-2
at -119 dBm or 0.25 µV p.d.
Modulation 1700 Hz ± 400 Hz
1200 baud ± 30 ppm
Frequency error Below ± 1 Hz
Residual DSC-mod. Below - 26 dB
* Note: The transmitter has a built in temperature sense function that will reduce the output power from 25W to
1W if the radio is getting too hot. This may happen if there is no free air circulation around the radio.
9945
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