User Manual

Page 127
GX1600/GX1700
20.3 RECEIVER
Frequency Range ............................................. 156.050 MHz to 163.275 MHz
Sensitivity
20 dB Quieting ................................................................................ 0.35 µV
12 dB SINAD .................................................................................. 0.25 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 ..................70 dB for Voice (70 dB for DSC)
Audio Output..................................4.5 W (at 4 ohms external speaker output)
Audio Response ............................................ within +1/-3dB of a 6 dB/Octave
de-emphasis characteristic at 300 to 3000 Hz
Frequency Stability ............... ±0.0003 % (-4 °F to +140 °F [-20 °C to +60 °C])
Channel Spacing ...................................................................................25 kHz
DSC Format ............................................................................ ITU-R M.493-13
20.4 GPS UNIT (GX1700)
Receiver Channels .......................................................................66 Channels
Sensitivity .........................................................................Less than -147 dBm
Time to First Fix ................................................ 1 minute typical (@Cold Start)
5 seconds typical (@ Hot Start)
Geodetic Datum................................................................................... WGS84
20.5 NMEA INPUT/OUTPUT
NMEA 0183 GPS Input (4800 baud) ........ GSA, GSV, GGA, GLL, GNS, RMC
NMEA 0183 DSC Output (4800 baud).......................................DSC and DSE
GSA, GSV, GGA, GLL, RMC (GX1700 when set to “On”)