CONFIGURATION AND SPECIFICATIONS
1-8
z
DSC Watch Keeping Receiver.
Reception frequency
Distress and safety frequencies of 2187.5 kHz and 8414.5 kHz, and
additionally on one or more of the 4207.5 kHz/ 6312.0 kHz/ 12577.0
kHz/ 16804.5 kHz
Receiving system
Double superheterodyne
1st IF
40.04025 MHz
2nd IF
40.25 kHz
Frequency stability
Within ±10 Hz
Sensitivity
1% or lower symbol error rate at reception input voltage of 1µV
Passband
6 dB bandwidth
: 270 - 300 Hz
30 dB bandwidth
: Within ±380 Hz
60 dB bandwidth
: Within ±550 Hz
Spurious response
Symbol error rate of 1% or better when an unwanted signal level of
31.6 mV is applied to a wanted signal level of 10 uv from an
intermediate frequency separated by 750 Hz or more through to a
frequency 3x the test frequency
Blocking/Desensitization
Symbol error rate of 1% or better at a wanted signal level of 10 uV
and an unwanted signal level of 1 mV separated by 500 Hz
Conducted spurious emission
Power emitted from antenna terminal is 2 nW or less.
Antenna impedance
50
Ω
unbalanced
z
DSC
Modem
Modulation rate
Within
100 baud ±30
x
10
-6
Modulation method
FSK (sub-carrier: 1700 Hz)
Mark frequency (Y)
Transmission
: Within 1615 Hz ±0.5 Hz
Reception (permissible value)
: Within 1615 Hz ±20 Hz
Space frequency (B)
Transmission
: Within 1785 Hz ±0.5 Hz
Reception (permissible value)
: Within 1785 Hz ±20 Hz
DSC protocol
ITU-R recommendation M.493-11 (Class A and B)
DSC operation standards
ITU-R recommendation M.541-9, M.821-1
DSC code
10-bit error detecting code
Message storage
20 messages for distress and 20 messages for others
z
NBDP
Modem
Modulation rate
Within 100baud ±30
x
10
-6
以内
Modulation method
FSK
(
sub-carrier
:
1700Hz
)
Mark frequency (Y)
Transmission
: Within 1615 Hz ±0.5 Hz
Reception (permissible value)
: Within 1615 Hz ±20 Hz
Space frequency (B)
Transmission
: Within 1785 Hz ±0.5 Hz
Reception (permissible value)
: Within 1785 Hz ±20 Hz
NBDP Protocol
ITU-R recommendation M.476-5,M.491-1,M.492-6,M.625-3
ITU-T recommendation F.1
、
F.130
、
S.6
NBDP code
7-bit error detecting code
z
Antenna
tuner
Frequency range
1605.0 - 27500.0 kHz
Max. input power
1605.0 - 3999.9 kHz
: 150Wpep
4000.0 - 27500.0 kHz
: 200Wpep
SWR after tuning
2:1 or less
Tuning method
Preset or auto-tuning
Tuning time
Preset tuning: 0.5 secs, auto-tuning: max. 45 secs
Power supply
24 VDC (21.6 VDC to 31.2 VDC)
Summary of Contents for JSS-2150
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Page 43: ...CONFIGURATION AND SPECIFICATIONS 1 29 ...
Page 44: ...CONFIGURATION AND SPECIFICATIONS 1 30 ...
Page 45: ...CONFIGURATION AND SPECIFICATIONS 1 31 ...
Page 52: ...CONFIGURATION AND SPECIFICATIONS 1 38 2 Antenna tuner NFC 2150 wiring diagram ...
Page 67: ...SETUP AND ADJUSTMENT 2 7 2 2 3 Menu tree ...
Page 68: ...SETUP AND ADJUSTMENT 2 8 ...
Page 84: ...SETUP AND ADJUSTMENT 2 24 ...
Page 108: ...Maintenance 4 10 ...
Page 128: ...Maintenance 4 30 ...
Page 132: ...APPENDIX 5 4 5 1 4 CMJ 2250 WKR MODEM UNIT DMC TRX DIODE SWITCH DIODE SWITCH ...
Page 134: ...APPENDIX 5 6 5 1 6 NDZ 227 DATA TERMINAL ...
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