Specifications
9-4
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.493-14 (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 Rx distress, 20 Rx others, 20 Tx messages
● NBDP Modem
Modulation rate
Within 100baud ±30 x 10
-6
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.625-4
ITU-T recommendation F.1, F.130, S.6
NBDP code 7-bit error detecting code
Antenna tuner
Frequency range 1605.00 - 27500.00 kHz
Max. input power
JSS-2150/2250/2500
1605.00 - 3999.99 kHz : 150Wpep / 250Wpep / 500Wpep
4000.00 - 27500.00 kHz : 200Wpep / 300Wpep / 700Wpep
SWR after tuning 2:1 or less
Tuning method Preset or auto-tuning
Tuning time Preset tuning: 0.5 seconds, auto-tuning: max. 45 seconds
Power supply 24 VDC (21.6 VDC to 24.7 VDC)
MF/HF controller
Communication speed 57.6 kbps
Communication interface RS-485 and RS-232C, and Centronics compliant
Microphone input impedance 150Ω balanced
Standard modulation input -54 dBm
Audio output Internal loud speaker (8Ω) : 5W max
External speaker impedance : 8Ω or more
Handset phone (150Ω) : Rated 1mW or more
LCD display 3.8 inch FSTN monochrome, 320 x 240 dot, LED backlight
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