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Maintenance and Trouble Clearing
FJTU-320-515-480
Before You Start
•
Make sure all connectors are cleaned before measuring. Optical connector
performance can be affected by dust.
•
Before you begin measuring, verify that the channel to be measured is not
carrying traffic.
•
Make sure the following required equipment is available: Optical Power
Meter with Sensor (Ando AQ-1135E/AQ-1965 or equivalent) and Optical
Fiber Test Cord (Fujitsu H660-5381-U920 SM, PC/PC or equivalent) with
the same type connectors used by power meter and optical units.
DANGER:
Never look into the end of a fiber pigtail or a fiber cable. Permanent eye damage or
blindness can occur very quickly if laser light is present.
Procedure
Step 1
Disconnect the optical fiber cord from the transmitter side of the HC1A/MC6A
unit.
Attach the protective cap to the optical fiber cord. (If no fiber cord is connected,
Step 2
remove the protective cap from the unit and keep the protective cap in the storage
box on the shelf for future use.)
Clean the optical connector on the HC1A/MC6A unit.
Step 3
Set the range on the optical power meter (see Figure 5-13) to match the expected
Step 4
power level as shown below:
•
MR units = –15.0 to –8.0 dBm
•
LR units = –5.0 to 0.0 dBm
Step 5
Clean the connectors on the optical fiber test cord.
Step 6
Connect one end of the optical fiber test cord to the sending side of the HC1A/
MC6A unit optical connector and the other end to the optical sensor used with the
optical power meter (see Figure 5-13).
Step 7
Plug the unit into the shelf.
Step 8
Record the optical power meter reading.
Issue 9, May 1999
FNC and FNC Customer Use Only
5.3: Measuring Optical Power
Vol. ll, Page 480.5-10
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