Furuno FR-2155, Service Manual

Page: 41 / 152

2-27
2.26 Radar and ARPA output signal from INT-9170
(J442, J443 and J444)
TRIG Signal (TRIG)
•
Polarity/Voltage : Positive, +12 V
•
Pulselength : 4 µs (J444)
5 to 10 µs (J442/J443)
VIDEO Signal (VIDEO)
•
Polarity/Voltage : Negative, 4 Vpp
•
Characteristic : Input of amplifier
•
GAIN/STC : Not controlled
BEARING Signal (BP)
•
Pulse : 360 pulses/one ant. rotation
•
Polarity/Voltage : Positive, +12 V
•
Duty Cycle : 50% ±20%
HEADING Signal (HD)
•
Polarity/Voltage : Negative, +12 to 0 V
•
Timing : Negative going edge
FR2115-SME-09F
6 s
J444
For ARPA
(Waveform)
12 V
0 V
5 to 10 s
J442/443
For radar slave
display unit
12 V
0 V
0.5 to 1.5 s
(Tx delay)
(Correct Timing)
4 Vpp
8 12 V
0 V
12 V
0 V
5 to 10