Unit installation

RSU-503 Redundancy Switch Unit Installation
Rev. 8 15
2.4 External Connections
All connections between the switch and other equipment are made through front panel
connections, as shown in Table 2-1 (refer to Figure 2-2 for connector locations).
CAUTION
Failure to properly connect the units will result in loss of communications
between the switch and the RFTs.
Table 2-1. 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
TX/RF INPUT J3 N TX Uplink 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
TX/RF INPUT J7 N TX Uplink from Unit B
MONITOR &
CONTROL
J8 26-pin Circ. Monitor and control
See Section 2.4.4 for pinouts
(See note
)
Switch to Antenna
TX/RF OUTPUT J9 N TX Uplink from online unit
WAVEGUIDE
SWITCH
J10 19-pin Circ. Waveguide switch control
See Section 2.4.6.1 for pinouts
Standby Unit Test Ports
TX/RF OUTPUT J11 N TX output test signal
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 2.6 for addressing information.