Symmetricom TimeSource 3100 User Guide

097-72020-01 Revision K – December 2005 TimeSource 3100 User’s Guide 59
Chapter 3 Installing the TimeSource 3100
Making Cable Connections
For the connection between the Time Source 3100 Shelf and the isolation module,
use the provided two 1.83 meter lengths of 50 ohm coax cables. If the TimeSource
3100 Shelf is not collocated with the DCD Shelf, and longer cables are required,
these must not exceed 15 meters, and are to be user-supplied.
DCD Shelf with Isolation Module
To install the isolation module, perform Procedure C.
1. On the rear of the DCD rack, check either side of the DCD shelf, directly above or
below the shelf, for a location to mount the isolation module. Mount the module to
the rack, using the two provided screws.
2. Use the provided 0.61 meter coax cable to connect from the appropriate A
connector on the DCD Shelf backplane to the TO DCD SHELF end of the
isolation module (refer to Table 3-1 and Figure 3-12).
3. Use the 1.83 meter coax cable to connect the REM OSC A connector on the
TimeSource 3100 Shelf to the TO LPR end of the isolation module (refer to
Figure 3-12).
Note: The isolation module must be mounted on the rack, in close
proximity to the DCD Shelf, whether or not the TimeSource 3100 is
installed in a collocated or non-collocated location from the DCD
Shelf. Attaching the isolation module (to the rack) grounds the
module to rack frame ground. Grounding the module to rack frame
ground is required if the TimeSource 3100 is located at a distance
less than 1.83 meters from the DCD Shelf.
Note: Due to distance constraints, the module must be placed no
more than 0.61 meter from the following connectors:
 OSC A/B OUT connectors on the rear of the DCD-519 and
DCD-523 (Rev. D or earlier) master shelves
 5 MHZ OUTPUT A/B connectors on the DCD-ST2 master shelf
 J35 and J36 connectors on the DCD-419 master shelf (Rev. D or
later)
Table 3-1. DCD Connections to the TimeSource 3100
DCD Shelf Type
From DCD Shelf
To TimeSource 3100
Connector
Connector Label
DCD-ST2
J24 5 MHz OUTPUT A REM OSC A
J25 5 MHz OUTPUT B REM OSC B

Symmetricom TimeSource 3100 Specifications

General

Brand	Symmetricom
Model	TimeSource 3100
Category	GPS
Language	English