Standard Horizon HX-870 - Manual (Page 133)

Page 133 HX870
21.3 RECEIVER (for Voice and DSC)
Circuit Type ............................................Double-Conversion Superheterodyne
Intermediate Frequencies .........................................for Voice 1st: 38.85 MHz
2nd: 450 kHz
for DSC 1st: 30.4 MHz
2nd: 450 kHz
Sensitivity ..................................................for Voice 0.25 μV for 12 dB SINAD
for DSC 0.5 μV for 12 dB SINAD
Adjacent Channel Selectivity ....................................................... 70 dB typical
Intermodulation ............................................................................ 70 dB typical
Hum & Noise Ratio ..................................................................................40 dB
Selectivity .................................................... 12 kHz / 25 kHz (−6 dB / −60 dB)
AF Output (Internal SP) ....................700 mW @16 Ω for 10 % THD (@7.4 V)
21.4 GPS
Receiver Channels .......................................................................66 Channels
Sensitivity ........................................................................Less than −147 dBm
Time to First Fix .....................................................1 min typical (@Cold Start)
5 sec typical (@Hot Start)
Geodetic Datum................................................................................... WGS84
21.5 NMEA OUTPUT
NMEA 0183 Output Sentence (9600 baud) ................. DSC, DSE, GGA, GLL,
RMC, GSA & GSV