Product specifications

CRS-170A L-Band 1:1 Redundancy Switch Revision 3
Introduction MN/CRS170A.IOM
In both cases, the CRS-170A is controlled by the supporting data switch, and places the “A” or
“B” modem RF on-line to match the data switch state. The CDM-600L (CLM-9600L) modems
supply redundant power to the CRS-170A through the CRS-150. The SMS-301 itself has
redundant power supplies, and feeds power to the CRS-170A through the control cable. Online-
standby modem configuration matching is provided by the CRS-150 controller communication
with the CDM-600L (CLM-9600L) modem. The SMS-301 does not automatically configure the
standby modem.
WARNING
The CRS-150 is an accessory product designed specifically for the Comtech EF
Data CDM-600 and CDM-600L (CLM-9600L) modems, and must not be used with
any other equipment.
1.1.1 Modem Side Connectors
The modem side connectors, shown in Figure 1-2 and outlined in the accompanying table,
provide all necessary external connections between the CRS-170A L-Band 1:1 Redundancy
Switch module and the specified Comtech EF Data modem.
Name Ref Des Connector Type Function
RX A J1 Type ‘N’ RF Input to Modem A
RX B J2 Type ‘N’ RF Input to Modem B
Control A J3
DB-9F
(9-pin Type ‘D’ female)
Control Interface with Modem A
Control B J4
DB-9F
(9-pin Type ‘D’ female)
Control Interface with Modem B
TX A J5 Type ‘N’ RF Output from Modem A
TX B J6 Type ‘N’ RF Output from Modem B
J6 TX B J5 TX A J3 Control A J2 RX B J1 RX A
J4 Control B
Figure 1-2. CRS-170A – Modem Side Connectors
1–3