CANOGA PERKINS 9145ELB Network Interface Device Hardware - Manual (Page 45)

Maintenance 9145ELB NID Hardware User’s Manual
General Maintenance
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Chapter 6
Maintenance
6.1 General Maintenance
Well maintained components and clearly identified cables help assure optimum system
operation. Damaged fiber optic cables and dirty connectors are a common source of signal loss
or attenuation. Fiber optics are especially susceptible to contamination. Inspect, clean, and test
all components to maintain optimum performance. Inspect the surface of the fiber optic ferrules
and clean as required.
CAUTION: Follow electrostatic discharge (ESD) safety precautions when
handling Canoga Perkins products, as with all electronic devices with static sensitive com-
ponents.
CAUTION: To avoid damage and signal loss, do not over-tighten or force-fit
optical connectors.
6.2 Checking Optical Power Levels
NOTE: For accurate results, warm up each unit for at least 30 minutes before checking power
levels. Ensure the Transmit laser is turned on when the unit is powered up.
To ensure proper performance levels, measure Transmitter Output Power, Receiver Input Power,
and attenuation for all fiber links. Each 9145ELB is shipped with a document that lists the output
power for each optical transceiver.
6.2.1 Measuring Transmitter Output Power
To measure the output power:
1. Inspect and clean the connectors on a fiber optic test cable with a known loss, then
connect it to the Tx connector on the 9145ELB.
2. Set the optical power meter to the proper wavelength.