Unit installation

RSU-503 Redundancy Switch Unit RSU-503L Option
Rev. 8 A–3
A.3 External Connections
Note:
The following connections, available on the RSU-503, are not available with the
RSU-503L:
• TX/RF Input (J3, J7)
• TX/RF Output (J9)
• TX/RF Output (J11) (test output only)
CAUTION
Failure to properly connect the units will result in loss of communications
between the switch and the RFTs.
All connections between the switch and other equipment are made through front panel
connections, as shown in Table A-1 (refer to Figure A-3 for connector locations).
Table A-1. RSU-503L External Connections
Name Desig. Type Function
Switch to RFT #A (Primary)
TX/IF OUTPUT J1 TNC, 50
Ω
IF Uplink to Unit A
RX/IF INPUT J2 TNC, 50
Ω
IF Downlink from Unit A
MONITOR &
CONTROL
J4 26-pin Circ. Monitor and control
See Section 2.4.4 for pinouts
(See note)
Switch to RFT #B (Backup)
TX/IF OUTPUT J5 TNC, 50
Ω
IF Uplink to Unit B
RX/IF INPUT J6 TNC, 50
Ω
IF Downlink from Unit B
MONITOR &
CONTROL
J8 26-pin Circ. Monitor and control
See Section 2.4.4 for pinouts
(See note)
Switch to Antenna
WAVEGUIDE
SWITCH
J10 19-pin Circ. Waveguide switch control
See Section 2.4.6.1 for pinouts
Standby Unit Test Ports
TX/IF INPUT J12 TNC, 50
Ω
IF input test signal
RX/IF OUTPUT J13 TNC, 50
Ω
IF output test signal
Switch to Modem Terminal Interface
TX/IF INPUT J14 TNC, 50
Ω
IF Uplink
RX/IF OUTPUT J15 TNC, 50
Ω
IF Downlink
MONITOR &
CONTROL
J16 26-pin Circ. Modem Terminal Interface (MTI)
See Section 2.4.12 for pinouts
Ground
GND ERDE None #10-32 Stud Chassis Ground
Note:
Refer to Section A.5 for addressing information.