Chapter 2 Engineering & Ordering
Antenna Cable Choices
38 TimeSource 3100 User’s Guide 097-72020-01 Revision K – December 2005
Remote Oscillator Cabling
If 5 MHz signals from a DCD Shelf are used as remote oscillator inputs, a 5 MHz
Isolator Kit must be used between the DCD shelves listed in Table 2-1 and the
TimeSource 3100 Shelf. Refer to Field Service Bulletin FSB 098-40620-19R2 for
details.
The 5 MHz Isolator Kit consists of the isolation module, associated screws, two 0.61
meter long RG-59/U, 75 ohm coax cables, and two 1.83 meter lengths of 50 ohm
cables. The 0.61 meter long cables have BNC connectors at both ends for
connecting to all shelves except for the DCD-419 (Rev. D or later), or SMB-to-BNC
connectors for connecting to the DCD-419.
The isolation module is used to reduce potential noise coupling, and match
impedances in the cables between the DCD master shelf and TimeSource 3100. It
also converts the 5 MHz output from a square wave to a sine wave.
The isolation module is installed between the TimeSource 3100 Shelf and the DCD
master shelf. To connect between the module and the DCD Shelf, two 0.61 meter
long RG-59/U, 75 ohm coax cables are provided.
If an isolator kit is not required, the following cable options are available:
Remote oscillator cable kit (093-72001-01) includes:
– Remote oscillator cables (2) (160-00201-06)
– Right-angle BNC connector adapters (4)
Remote oscillator cable (160-00201-06)
Table 2-1. Isolation Kits for DCD Shelves
Shelf Isolator Kit Part Number
DCD-ST2 093-45110-06
DCD-519 093-45110-06
DCD-419 093-45110-07
DCD-521 (not required with DCD-521/C) 093-45110-06
DCD-523 (backplane Revision D or earlier) 093-45110-06
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