Extron electronic FPM 101, FLS 101 manual Measuring Optical Power, To Measure Optical Power

Measuring Optical Power

CAUTION: It is important to keep all optical connections and surfaces free from dirt, oils, or other contaminants to ensure proper operation. Always clean all test reference cables before conducting the test procedures outlined in this guide. See “Cleaning Optical Ports” on page 17 for details.

To Measure Optical Power

1.Turn on the FPM 101 power meter by pressing the power button (A).

2.Select the appropriate fiber optic reference cable. The fiber type of this cable must be the same as the fiber type normally connected to the equipment output being measured.

NOTE: Always verify that reference cable loss is not excessive (< 0.5 dB), before

measuring the power output of fiber optic equipment

(see “Testing Fiber Optic Links” on page 12).

3.Select the adapter cap matching the reference cable connector and type.

4.Connect one end of the reference cable to the adapter cap and the other end to the optical output to be measured.

5.Press the wavelength button (E) to select the calibrated wavelength matching the nominal wavelength of the source under measurement.

6.If the power meter is presently measuring insertion loss in dB, press the dB/dBm button (F) to display power in dBm, or press and hold it to display power in μW.

Fiber Optic Equipment

d

c Adapter Cap

		0000	nm	e
			Hz
			∝W	f
		0.00 dB
		0000	Hz
			nm
		0.00	∝W
			dB
	µW	Set
f	dB	Ref	λ	e
	dBm

FPM 101

FIBER POWER METER

a

POWER

d

Reference Cable

b

Figure 6. Power Measurement Connections

Fiber Optic Test Meters • Operation 11