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 194 of 240
10.8.8 NTX-A402 backplane
Modular Interface System Backplane (MISB)
Part number: NTX-A402-7
Backplane software: ZM-2279
The modular interface system backplane within the Radar Distribution Unit is a flexible backplane
system designed to provide interconnect and communication resources to the installed MISMs. The
modular interface system backplane incorporates a microcontroller with multiple serial communication
interfaces. A field programmable gate array (FPGA) provides digital routing and processing
resources. This allows modules to interface to other modules and the serial communication interfaces.
The modular interface system backplane also incorporates analogue cross point switching to allow
radar video to be routed between modules.
LEDs, links and test points
LEDs (all green)
D1
F
lashes when
the
microcontroller is operating
normally
D6
Lit when +1.2
V supply
present
D7
Lit when +1.5V supply present
D
8
Lit when +3.3
V supply present
D9
Lit when
-
5.0
V supply present
Links
LK1
Position A Video B2 Out routed to SW IP 04 (input)
Note: Links 1 to 8
Links 1 to 8 are configured during
manufacture and should not be changed
during operation or service unless specifically
instructed to do so by Kelvin Hughes Ltd.
The default link settings are:
Links 1 to 4 = B position
Links 5 to 8 = A position
The links are used to route the video via a 16
x 16 analogue cross point switch which is
controlled by the microcontroller. This routes
any of the video inputs to one or more of the
16 video outputs. The video inputs and
outputs are 75|, 1 V peak-peak radar video.
The video cross point switch provides outputs
with the same characteristic as the input.
Position B
Video B2 Out routed to SW OP 04 (output)
LK2
Position A Video A2 Out routed to SW IP 03 (input)
Position B
Video A2 Out routed to SW OP 03
(output)
LK3
Position A Video B1 Out routed to SW IP 02 (input)
Position B Video B1 Out routed to SW OP 02 (output)
LK4
Position A
Video A1 Out routed to SW IP 01 (input)
Position B Video A1 Out routed to SW OP 01 (output)
LK5
Position A
Video
B
2 In routed to SW IP 08 (input)
Position B Video B2 In routed to SW OP 08 (output)
LK6
Position A Video A2 In routed to SW IP 07 (input)
Position B
Video A2 In routed to SW OP 07 (output)
LK7
Position A Video A1 In routed to SW IP 05 (input)
Position B
Video A1 In routed to SW OP 05 (output)
LK8
Position A Video B1 In routed to SW IP 06 (input)
Position B Video B1 In routed to SW IP 06 (output)
LK9
Open Normal operation (default)
Made Test Mode (Kelvin Hughes use only)
LK10
Open
Normal operation
(default)
Made
Setup Enabled
(setting to work use only)
Test points
TP1 Ground/ 0V TP8 +24V
TP2 Ground/ 0V TP9 +3.3 V
TP3
Ground/ 0V
TP10
+1.5 V
TP4
Ground/ 0V
TP11
+1.2 V
TP5
+5.0VDC
TP12
A
-
5V
TP6
-
15VDC
TP13
Debug (Kelvin Hughes use only)
TP7
+15V