CANOGA PERKINS 2240 Fiber Optic Modem - Manual (Page 87)

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Chapter 6
Diagnostic Procedures
6.1 2240/2201 Diagnostic Procedures
The following diagnostic procedures should be followed to test the 2240 system, troubleshoot a
defective link or detect a defective fiber optic cable, connector, modem or power supply.
NOTE: Refer to the 2201 Rack Chassis/2200R Redundant Modem Card User
Manual for diagnostic procedures for the 2201 Rack Chassis and power
supplies.
6.1.1 Required Equipment
• Multimeter - for AC voltage, resistance and continuity tests.
• Fiber Optic Power Meter - should be calibrated at the correct optical wavelength with the
appropriate optical connectors.
• A short (one meter or less) fiber optic jumper cable consistent with the modem optics
under test, terminated with the appropriate connectors.
• A Bit Error Rate Tester (BERT) with the appropriate electrical interface and cable.
NOTE: Once any power system problems have been corrected, continue the
system checkout after the Loopback Diagnostic Procedure.
Step Symptom Possible Causes Action
1 No power indicator on front
panel(s) No AC power Check AC power source
2 No power indicator on front
panel(s) Defective modem Replace Modem