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Comtech EF Data RRS11 User Manual

Page 22

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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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