User's Manual

SBS-900 Shore Based Radar Systems
Chapter 10: Corrective maintenance
KH-1602-2 issue 1: Standard SBS900 Systems Operator & Maintenance Handbook
Page 202 of 240
Heading line: The heading line utilises the same circuitry as for a pulsed format, but are all
terminated by a link selectable 120| resistor.
ARP/ Heading line signals can be received as pulsed, quadrature, RSS422 or
+5.0V to +17.5V peak-peak (adjustable during system configuration, factory
set to +15V).
LEDs, links and test points
LEDs (all green) LED Status
D4 Lit when sync pulses (in & out) present at the backplane
ON
An input is being received
and an output generated at
the backplane
D5 Lit when video signals are present
D6 Lit when auxiliary video (blanking) pulses are present
Flashing
Only an input or an output is
available at the backplane
D7 Lit when azimuth signals are present
D8 Lit when heading line pulses are present
OFF
No input is being received or
no output is available from the
backplane
from
the backplane
D10 Lit when +5.0V is present
D11 Lit when -5.0V is present
Links (factory default settings in BOLD)
LK1
Open Heading line un-terminated
Made
G_[^cha fch_ n_lgch[n_^ 01/| `il QR311
LK2
Open Azimuth 2 un-terminated
Made
Azimuth 2 terminated
01/| `il QR311
LK3
Position A Pulsed heading line input
Position B Closing contact heading line input
LK4
Open
Heading line input for >5VDC
Made Heading line input for RS422 levels or <5VDC
LK5
Open
Azimuth 1 input for >5VDC
Made
Azimuth 1 input
for RS422 levels or <5VDC
LK6
Open Azimuth 1 un-terminated
Made
@tcgonb 0 n_lgch[n_^ 01/| `il QR311
LK7
Open Azimuth 2 input >5VDC
Made
Azimuth 2 input for RS422 levels or <5VDC
LK8
Position A
Variable azimuth and heading line amplitude
Position B RS422 azimuth and heading line level amplitude
Test points
TP1
Heading line IN LVTTL heading line pulses (3.3VDC)
TP2
Az1 IN LVTTL pulse for each azimuth pulse
TP3
Not accessible for service or maintenance use
TP4
Az2 IN LVTTL pulse for each azimuth pulse
TP5
Video IN 1.0V peak to peak video
TP6
Analogue ground 0V
TP7
Aux video IN LVTTL video or blanking pulses
TP8
Sync IN LVTTL pulses
TP9
Video OUT 1.0V to 5.0V peak to peak video
TP10
Blanking pulse OUT 3.0V to 14V pulses
TP11
Sync OUT 3.0V to 14V pulses
TP12
Analogue ground 0V
Power
The Radar I/O PCA uses +24V, +15V, +3.3V and -15V directly from the backplane. The +24V is
applied to a Voltage Regulator to generate a +5.0V and -5.0V supply for the internal circuits.
- LED D10 is lit when the +5.0V supply is present.
- LED D11 is lit when the -5.0 V supply is present.