Fujitsu FLM 150 ADM Maintenance And Trouble Clearing page 175

Maintenance and Trouble Clearing
FJTU-320-515-480
Before You Start
• Check for correct optical output using the procedure in Section 5.3.1,
Measuring Optical Output Power.
• Clean all optical connectors.
• Make sure the channel to be measured is out of service.
• Make sure you have the Optical Power Meter with Sensor
(Ando AQ-1135E/AQ-1965 or AGNT).
DANGER:
Never look into the end of a fiber optic cable, fiber cord, fiber pigtail, or fiber.
Permanent eye damage or blindness can occur very quickly if laser light is present.
Procedure
Step 1 Remove the HC1A-MC6A unit.
Step 2 Disconnect the optical fiber cord from the receive side of the unit.
Step 3 Attach the protective cap to the unit. The cap should remain in place during
measurement.
Clean the end surface of the optical fiber cord.
Step 4
Connect one end of the optical receive fiber cord to the optical attenuator (see
Step 5
Figure 5-14).
Step 6 Ensure that the HC1A/MC6A unit at the distant end is connected to the
transmission line and is transmitting an optical signal.
Step 7 Record the optical power meter reading. Required optical parameters are as
follows:
• MR units = Minimum –28 dBm
• LR units = Minimum –34 dBm
Issue 9, May 1999 FNC and FNC Customer Use Only
5.3: Measuring Optical Power
Vol. ll, Page 480.5-13