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JRC JSS-2250 Instruction Manual Page 175

Mf/hf radio equipment.
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Overall distortion and noise
Conducted spurious emission
Clarifier variable range
Antenna impedance
Line output
DSC Watch Keeping Receiver
Reception frequency
Receiving system
1st IF
2nd IF
Frequency stability
Sensitivity
Passband
Spurious response
Blocking/Desensitization
Conducted spurious emission
Antenna impedance
DSC Modem
Modulation rate
Modulation method
Mark frequency (Y)
Space frequency (B)
DSC Protocol
DSC operation standards
DSC code
NBDP Modem
Modulation rate
Modulation method
Mark frequency (Y)
Space frequency (B)
NBDP Protocol
NBDP code
When an input signal level of 30 uV is applied, the ratio
between low-frequency output 1000 Hz and unwanted
components contained in that output is 30 dB or more.
Power emitted from antenna terminal is 2 nW or less (9kHz
- 2GHz) and 20 nW or less (2GHz - 4GHz).
±200 Hz (1 Hz steps)
50Ω unbalanced
0 dBm 600Ω (balanced)
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
Double superheterodyne
40.04025 MHz
40.25 kHz
Within ±10 Hz
1% or lower symbol error rate at reception input voltage of
1µV
6 dB bandwidth
30 dB bandwidth
60 dB bandwidth
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
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
Power emitted from antenna terminal is 2 nW or less.
50Ω unbalanced
Within
100 baud ±30x 10
FSK (sub-carrier: 1700 Hz)
Transmission
Reception (permissible value) : Within 1615 Hz ±20 Hz
Transmission
Reception (permissible value) : Within 1785 Hz ±20 Hz
ITU-R recommendation M.493-13 (Class A and B)
ITU-R recommendation M.541-9, M.821-1
10-bit error detecting code
Within 100baud ±30x 10
FSK
( sub-carrier: 1700Hz)
Transmission
Reception (permissible value) : Within 1615 Hz ±20 Hz
Transmission
Reception (permissible value) : Within 1785 Hz ±20 Hz
ITU-R recommendation M.476-5,M.491-1,M.492-6,M.625-4
ITU-T recommendation F.1、 F.130、 S.6
7-bit error detecting code
: 270 - 300 Hz
: Within ±380 Hz
: Within ±550 Hz
- 6
: Within 1615 Hz ±0.5 Hz
: Within 1785 Hz ±0.5 Hz
- 6
以 内
: Within 1615 Hz ±0.5 Hz
: Within 1785 Hz ±0.5 Hz
Specifications
9-3

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Jss-2500, Jss-2250n, Jss-2500n

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