Unit installation
RSU-503L Option RSU-503 Redundancy Switch Unit
A–2 Rev. 8
A.1 Description
Refer to Figure A-2 for an interconnection block diagram of the RSU-503L in a typical
earth station application.
Using WR229 (C-band) or WR75 (Ku-band) waveguide, the RSU-503L routes the RF
outputs from both RFTs directly to a waveguide switch on the antenna plate.
In addition to the RSU-503 functions, the RSU-503L provides command pulses for the
external uplink waveguide switch (28V).
A.2 Assemblies
The RSU-503L consists of the following assemblies:
Assembly EFData Part #
Top Assembly PL/3000-1
Cable Harness PL/3001-1
Chassis Base FP/3802
Panel Divider FP/3139
M&C Assembly, RSU-503L PL/3002
M&C Firmware, RSU-503L FW/3080-1
T
X
/
IF
RX/IF
C
A
/
3005
RFT-XXX
#A
AS/2578
TNC
TN C
TX/RF
R
X
/
RF
C
A
/
1530
WAVEGUIDE
AS/3000-1
J4
CA/3003
M&C-RS232
A
A
26
J1
J2
CA/3005
RX/IFTX /IF
A
TNC
TN C
J14
J15
TX /IF
70 M Hz
IN P U T
RX/IF
TN C
S1
1
3
2
4
1
3
6
IND
P19
M&C
WAVEGUIDE
SW ITCH
S3
3
1
4
2
6
6
LNA
#A
IN P U T
WG TO N
ADAPTER
19
J10
LNA
TEST
12
WG
AS/3002
4
6
P21
P20
S2
2
J16
70 MHz
OUTPUT
RS232
REMOTE
CONTROL
TNC
J5
J12
J6
STANDBY
TX /IF
TEST
IN P U T
TN C TN C TN C
TX /IF
B
C/A3005
J13
J8
RF/IF
B
STANDBY
RF/IF
TEST
OUTPUT
TN C
26
CA/3003
M&C-RS232
B
RSU-503L
LN A
#B
REDUNDANT
SW ITC H PLA TE
LNA
W
A
V
EGUIDE
SWITCH
W
A
V
EGUIDE
CA/1530
T
X
/
RF
R
X
/
RF
RFT-XXX
#B
AS/2578
TNC
TNC
RF/IF
TX /IF
SHO
W
N
W
ITH " B "
ON
LINE
LOW LOSS REDUNDANCY SWITCH UNIT
TO
A
NTENN
A
FROM ANTENNA
N
N
CA/3951
UPLINK
IND
IND
Figure A-2. RSU-503L Low Loss Block Diagram