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Fls-2100, Fva-3100, Pm-1600 – EXFO PM-1600 High-Speed Power Meter User Manual

Page 69: Performing typical tests with your pm-1600, 59 testing instrument linearity, High-speed power meter

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Performing Typical Tests with Your PM-1600

High-Speed Power Meter

59

Testing Instrument Linearity

When verifying instrument linearity, a linear variable attenuator (e.g.,
FVA-3100) is also required. Before verifying the linearity of an optical
detector, you must confirm the linearity of the attenuator being used.

Confirming the Linearity of the Attenuator Being
Used

Before getting started, you need a stable source (FLS-2100), a variable
attenuator, a PM-1600, two test jumpers, and appropriate connector
adapters.

To confirm the linearity of the attenuator being used,
1.
Connect the instruments as shown below.

2. With all instruments set to the same wavelength and the attenuator set

to minimum attenuation, take a PM-1600 reference measurement and
switch to relative display. Also, switch the attenuator to relative display
mode.

OPTICAL LIGHT SOURCE

FLS-2100

On/Off

ENTER

CW

Up

λ

Modulation Down

Store

Setup

FLS-2100

Attenuation

ACTIVE

VARIABLE ATTENUATOR

FVA-3100

Offset

ENTER

Abs

Up

Shutter

Rel

λ

Down Attenuation

Program

Setup

FVA-3100

Step

In

Out

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

Performing Typical Tests with Your PM-1600

High-Speed Power Meter

59

Testing Instrument Linearity

When verifying instrument linearity, a linear variable attenuator (e.g.,
FVA-3100) is also required. Before verifying the linearity of an optical
detector, you must confirm the linearity of the attenuator being used.

Confirming the Linearity of the Attenuator Being
Used

Before getting started, you need a stable source (FLS-2100), a variable
attenuator, a PM-1600, two test jumpers, and appropriate connector
adapters.

To confirm the linearity of the attenuator being used,
1.
Connect the instruments as shown below.

2. With all instruments set to the same wavelength and the attenuator set

to minimum attenuation, take a PM-1600 reference measurement and
switch to relative display. Also, switch the attenuator to relative display
mode.

OPTICAL LIGHT SOURCE

FLS-2100

On/Off

ENTER

CW

Up

λ

Modulation Down

Store

Setup

FLS-2100

Attenuation

ACTIVE

VARIABLE ATTENUATOR

FVA-3100

Offset

ENTER

Abs

Up

Shutter

Rel

λ

Down Attenuation

Program

Setup

FVA-3100

Step

In

Out

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