Connecting Cables
7705 SAR-A Chassis Installation Guide 105
Making External Synchronization Connections
The 7705 SAR-A provides one 1.0/2.3 DIN connector for external synchronization input. It
supports the following synchronization input signals with the following impedance:
• 2.048 MHz at 75 Ω
• 5 MHz at 50 Ω
• 10 MHz at 50 Ω
Figure 24 shows the location of the Sync In connector.
Figure 24: External Synchronization Input Connector
Hardware required:
• shielded DIN cable with 1.0/2.3 coaxial connector
Shielded cable must be used to maintain EMC compliance.
Connecting an External Synchronization Input
To connect an external synchronization source input to the router:
Step 1. Attach one end of the synchronization cable to the Sync In connector on the
7705 SAR-A.
Step 2. Attach the other end of the synchronization cable to the external synchronization
source.
7705 SAR-A
Mgmt
ToD Out
Lnk Act
Sync
In
+Batt A
-Batt A
+Batt B
-Batt B
Console
812111097654B3B2B1B1A
Status
2A 3A 4A
ActLnk ActLnk ActLnk ActLnk
Stat Stat Stat Stat
2468
1357
Lnk Act Lnk Act Lnk Act Lnk Act
Stat Stat Stat Stat
T1/E1Ethernet
-48 VDC
23314
Synchronization In
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