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
![background image](/manuals/736489/69/background.png)
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