User's Manual

JUNI JF43-E1900/CFN03
CDMA FIBER FED REPEATER OPERATIONS MANUAL
Version 1.17 ⓒ J
uni America Inc. Page 23 of 88
3.5.2 Cautions during Installation
1. Caution when connecting the optic cable:
● Clean the connection part of connector using an industrial tissue and 99.9% pure
alcohol.
● After connecting the optic jumper cable, the residual section should be set in a
large circular form to prevent it from folding.
2. Caution when setting the repeater :
● Do not power on the system while the output port of the system is not connected.
● Before connecting the DHU input from the BTS, measure and confirm the DHU
input level is within the DHU input dynamic range.
● Confirm the connections of the cables and connectors are tight.
● Confirm the ground connection complies with the safety specifications for
protection against thunderstorms.
3.5.3 Optical Fiber Jumper Cable Assembly
An Optical Fiber Jumper Cable assembly is available from Juni America, Inc. to
facilitate connection from a single-mode optical fiber transmission facility (dark fiber)
to the DHU or RU. The Optical Fiber Jumper Cable assembly is shown in the figure
below. It has an overall length of approximately 100 feet. It includes a weatherproof
“boot” assembly which serves to seal the circular opening (in the DHU or RU), where
the optical fiber jumper cable enters and connects to the FFR subsystem, via the
FC/APC connector provided.
Only one optical fiber core is required for the optical fiber connection between the
DHU and RU, and a second optical fiber core is provided within the jumper cable
assembly as a “spare”. Should one of the fiber cores fail, ensure the system is turned
off by following the “Replacement of faulty units” section. Unplug the problematic fiber
core from the DHU and RU and plug the spare jumper cable into the unit. This will
only work provided the spare fiber is functioning.