Comtech EF Data RRS11 User Manual
Page 22
RRS11 Solid-State Transfer Switch
Operation
MN-RRS11
3–4
Rev. 3
Table 3-1A, RRS11-L L-Band Rear Panel Connectors
Connector
ID
Nomenclature
Description
J1
Online Status
Output
9-Pin D-Sub Switch Status Form-C Relay Outputs
J2
Prime Mod Control
9-Pin D-Sub Control Connector From Prime Modulator
J3
Backup Mod Control
9-Pin D-Sub Control Connector From Backup Modulator
J4
Monitor A Input
SMA 50 Ohm from Modulator A Monitor Output
J5
Monitor B Input
SMA 50 Ohm from Modulator B Monitor Output
J6
On-Line Output
N-Type 50 Ohm, Output of On-Line Modulator to Uplink Chain.
J7
Off-Line Output
N-Type 50 Ohm Output of Monitor Port of Off-Line
Modulator
J8
L-Band Input A
SMA 50 Ohm From Modulator A
J9
L-Band Input B
SMA 50 Ohm From Modulator B
Each modulator has a 9-Pin D-Sub Connector that connects to the RRS11 switch. A 1:1 cable is
connected from each modulator to the RRS11 switch. The pinout for the control connector is
listed in Table 3-2.
Table 3-2. Switch Prime/Backup Control Pinout
Pin No.
Signal Name
Direction
Description
5
Signal Ground
Input
Modulator GND
9
Backup Select
Output
One modulator is designated as Backup. This line
is tied low on the Backup Mod Control connector.
1
+DC
Input
+12V DC Power
2
nPrime_Sel
Input
Forces On-Line Output to Prime
7
nBackup_Sel
Input
Forces On-Line Output to Backup
8
Fault-In
Input
Fault Output From Modulator
4
Fault-Out
Output
Connects to Fault-In Monitor on Modulator
3
Switch-State
Output
Switch State Monitor.
Logic '1' = Prime Online
6
NC
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