EXFO PM-1600 High-Speed Power Meter - Manual (Page 68)

Performing Typical Tests with Your PM-1600
58 PM-1600
Testing Instrument Linearity
4. On the PM-1600 Power Meter, set the measurement units to dB or dBm
and press Ref. The reference value has now been taken and the display
should read 0.000 dB.
5. Replace the bulkhead adapter with the DUT as shown in the following
figure.
6. The insertion loss of the DUT is the relative measurement as displayed
by the PM-1600. For best results, ensure that the setup remains stable.
Testing Instrument Linearity
As stated in Measuring Insertion Loss on page 57, absolute power levels are
not particularly significant when measuring the insertion loss of a
fiber-optic component. In calculating insertion loss, we are essentially
measuring the difference between the power in and out of a DUT. To
accurately measure delta power, instrument linearity is very important.
The PM-1600 High-Speed Power Meter is specified to be very linear, down
to −55 dBm. Not only is the PM-1600 ideal for measuring insertion loss, it is
also suitable as a reference instrument for determining the linearity of
other fiber-optic components such as attenuators, other power meters, and
optical detectors.
HIGH-SPEED POWER METER PM-1600
dB W/W
ENTER
dBm/W Ref
Null
Display
Range λ Avg Shift
Store
Recall
Program
Setup
Analog Out C1 Ext. Trig
PM-1600
OPTICAL LIGHT SOURCE FLS-2100
On/Off
ENTER
CW Up
λ Modulation Down
Store
Setup
FLS-2100
Attenuation
ACTIVE
DUT
Test jumper Test jumper
Performing Typical Tests with Your PM-1600
58 PM-1600
Testing Instrument Linearity
4. On the PM-1600 Power Meter, set the measurement units to dB or dBm
and press Ref. The reference value has now been taken and the display
should read 0.000 dB.
5. Replace the bulkhead adapter with the DUT as shown in the following
figure.
6. The insertion loss of the DUT is the relative measurement as displayed
by the PM-1600. For best results, ensure that the setup remains stable.
Testing Instrument Linearity
As stated in Measuring Insertion Loss on page 57, absolute power levels are
not particularly significant when measuring the insertion loss of a
fiber-optic component. In calculating insertion loss, we are essentially
measuring the difference between the power in and out of a DUT. To
accurately measure delta power, instrument linearity is very important.
The PM-1600 High-Speed Power Meter is specified to be very linear, down
to −55 dBm. Not only is the PM-1600 ideal for measuring insertion loss, it is
also suitable as a reference instrument for determining the linearity of
other fiber-optic components such as attenuators, other power meters, and
optical detectors.
HIGH-SPEED POWER METER PM-1600
dB W/W
ENTER
dBm/W Ref
Null
Display
Range λ Avg Shift
Store
Recall
Program
Setup
Analog Out C1 Ext. Trig
PM-1600
OPTICAL LIGHT SOURCE FLS-2100
On/Off
ENTER
CW Up
λ Modulation Down
Store
Setup
FLS-2100
Attenuation
ACTIVE
DUT
Test jumper Test jumper