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 155 of 240
10.7.8.3 Signal interfaces:
There are multiple interfaces for the Switch control and BITE PCA. The status of the various inputs is
monitored and transmitted to the RDU.
Control and
BITE PCA
Tx A
Tx B
Turning Mechanism
CHL or KH Antenna
Encoder Fail
Processor
Oil Level
Oil Temp
Horizontal Polarisation
Waveguide Switch
Switch Position A Switch Position B
Tellback
Driver
Motor OnMotor On
RDU
RS422
Differential
Driver
Differential
Driver
Blanking
Blanking
Blanking
Blanking Circular Polarisation
Driver
Polarisation Tellback
CAN
ACP
ARP
Video
Sync
ACP
ARP
Temperature
Sensor
Temp
ACP ARP
ACP ARP
Optional
Cooling
Fans
RPM Data x6
SBS-A126 signal interface schematic
Oil level: The oil level indicator monitors a normally closed voltage free contact. An open circuit
ch^c][n_m [ fiq icf `[ofn ]ih^cncih- Sbcm cm ihfs [p[cf[\f_ ih advanced antenna sub-
systems.
Oil temp: The oil temperature indicator monitors a normally closed voltage free contact. An
ij_h ]cl]ocn ch^c][n_m [h ip_l n_gj_l[nol_ `[ofn ]ih^cncih- Sbcm cm ihfs [p[cf[\f_ ih
advanced antenna sub-systems.
Encoder fail: The encoder on advance antenna sub-systems has a TTL (+5.0VDC) encoder fail
signal. @ l_]_cp_^ mcah[f i` z2.5V indicates normal operation, a signal of <0.5V
ch^c][n_m [h Dh]i^_l E[cf `[ofn ]ih^cncih-
Polarisation control: This is only available on advanced antenna sub-systems and controls the
status of the antenna polarisation. The default position is horizontal.
Polarisation tellback: The current polarisation position is fed to the PCA and reported to the RDU.