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10
3.3. Receiving Unit
Receive System
Double Conversation Super Heterodyne
1st 21.7MHz
Intermediate Frequencies
2nd 450kHz
Local Oscillation Frequency
Receiving Frequency - 21.7MHz
Local Oscillation Mode
SYNTHESIZER Mode
Sensitivity
32uV (20dB SINAD)
0.22uV (12dB SINAD)
Audio Frequency Response
-6dB/octave
Squelch Sensitivity
0.22uV
Co-Channel Rejection
-10dB ~ 0dB
Adjacent Channel Selectivity
Over 70dB
Spurious Response Rejection Ratio
Over 70dB
Inter-modulation Rejection Ratio
Over 68dB
Spurious Emission
Less than 2nW(-56.9dBm)
Hum and Noise
Less than -40dB
Audio Output Power (at 13.6 V DC)
4.5W / 4
Ω
(Distortion Rate: Less 10%)
3.4. Dedicated Receiving Unit
Operating Frequency
156.525MHz
Mode 16K0G2B
Receive System
Double-Conversion Super Heterodyne
Intermediate Frequencies
1st 10.70 MHz
2nd 450 kHz
Inter-modulation Rejection Ratio
Over 68dB
Adjacent Channel Selectivity
Over 70dB
Spurious Response Rejection Ratio
Over 70dB
Spurious Emission
Less than 2nW(-56.9dBm)
DSC Modulation Speed
1200baud (
±
30ppm)
DSC Modulation Mode
FSK
DSC Modulation Rate
Within m=2
±
10%
MARK Frequency
Within 1300Hz
±
10Hz
SPACE Frequency
Within 2100Hz
±
10Hz
Maximum Sensitivity Available
Bit Error Rate: Less than 10
-2
in 0.25uv
DSC Operation
ITU-R M.541-9
ITU-R M.689-2
DSC Protocol
ITU-R M.493-11 class-A
DSC FILE Memory
DISTRESS-Related Message Reception: 20
OTHERS-Related Message Reception : 20
Содержание STR-6000A
Страница 1: ...1 MARINE DSC VHF RADIO TELEPHONE FOR GMDSS OPERATING MANUAL STR 6000A SAMYUNGENC CO LTD...
Страница 19: ...19 STR 6000A Main Body STR 6000A Microphone...
Страница 47: ...47 END OF SEQUENCE contents among the received message should be ACK RQ No received ERROR ECC ERROR...
Страница 49: ...49...
Страница 65: ...65 Chapter 9 Block Diagram...
Страница 66: ...66 Chapter 10 Overall Drawing...