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22.3 RECEIVER (for Voice and DSC)
Frequency Range ............................................ 156.050 MHz to 163.275 MHz
Sensitivity
20 dB Quieting .............................................................................. 0.35 µV
12 dB SINAD ................................................................................. 0.30 µV
Squelch Sensitivity (Threshold) ..................................................... 0.13 µV
Modulation Acceptance Bandwidth ...................................................±7.5 kHz
Selectivity (Typical)
Spurious and Image Rejection ................ 80 dB for Voice (75 dB for DSC)
Intermodulation and Rejection ................ 80 dB for Voice (75 dB for DSC)
Audio Output ................................ 4.5 W (at 4 ohms external speaker output)
Audio Response .......................................... within +1/–3dB of a 6 dB/Octave
Frequency Stability .......................................... ±0.0003 % (–20 °C to +60 °C)
Channel Spacing ................................................................................. 25 kHz
DSC Format .......................................................................... ITU-R M.493-12
Antenuator (Local) .................................................................... Approx. 10 dB
22.4 RECEIVER (for AIS)
Frequency .................................. 161.975 MHz (CH A), 162.025 MHz (CH B)
Sensitivity ................................................................. 0.5 µV (at 12 dB SINAD)
Selectivity(Typical)
Spurious and Image Rejection ......................................................... 70 dB
Intermodulation and Rejection ......................................................... 70 dB
22.5 NMEA Input/Output
NMEA 0183 GPS Input (4800 baud) .......................... GGA, GLL, GNS, RMC
NMEA 0183 DSC Output (4800 baud) ..................................... DSC and DSE
NMEA 0183 AIS Output (38400 baud) .................................................... VDM
GX2000/GX2100
de-enphasis characteristic at 300 to 3000 Hz
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