Skanti DSC 9001, Technical Manual, Page: 10 / 178

Input Impedance:
600 ohms, free of earth.
Scanning Interface:
Scanning of up to six frequencies may be
s e l e ct e d f r o m p r e - p r o g r a m m e d o r
user-programmed frequencies.
Scanning table and step commands are
transferred via transceiver interface.
Stops on 100 baud dot pattern only.
DSC ENCODER
Modulation:
Phase continuous AFSK keying.
Output Frequency:
1700 Hz +/-85 Hz.
Frequency Accuracy:
Better than 0.5 Hz.
Modulation Rate:
100 baud, +/-30 ppm.
Output Level:
Adjustable, -10 to +10 dBm, 600 ohms.
Output Impedance:
600 ohms, free of earth.
Unwanted Spectral Components:
More than 60 dB below mean power output
level.
TRANSCEIVER CONTROL
Control Data Interface:
Serial interface, compatible with RS-232.
Baud Rate: 2400 bps(T+Bus) /
4800 bps(NMEA).
Interface Protocol:
T+Bus(default) / T+Bus, one way / NMEA
TX Key Signal:
Open collector output, compatible with RS-410
type N.
Max current 50mA. Max voltage 32V. Low for
keying TX.
Handset On-Hook Signal:
RS-410 type N input. Internally pulled up to
12V through 1.8 kohm.
Should be connected to GND when handset is
off-hook or on-hook as determined by
configuration.
RADIOTELEX INTERFACE
Control Data Interface:
Serial interface, compatible with RS-232.
Opto-isolated (internally selected).
Baud rate: 2400 bits/sec.
Interface Protocol: T+Bus.
TX Key Signal:
RS-410 type N input.
Internally pulled up to 12V through 1kohm.
Should be connected to GND for keying TX.
OTHER INTERFACES
Navigator (DU or DCU):
Serial interface, opto-isolated, conforming with
NMEA 0183. Baud rate: 4800 bits/sec.
Printer (DU or DCU):
Serial interface compatible with RS-232,
opto-isolated (internally selected). Baud rate:
300 - 9600 bits/sec.
External Distress Alarm Button (DU or
DCU):
RS-410 type N input.
Internally pulled up to 12V through 1.8kohm.
Should be connected to GND when distress
button is activated.
Alarm Out (DCU):
Open collector output, compatible with RS-410
type N.
Max current 50mA. Max voltage 32V.
Low when Distress lamp is on.
Alarm 1 Out (DU):
Open collector output, compatible with RS-410
type N.
Max current 50mA. Max voltage 32V. Low as
determined by configuration.
INTRODUCTION TECHNICAL DATA
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