EXFO PM-1600 High-Speed Power Meter - Manual (Page 71)

Performing Typical Tests with Your PM-1600
High-Speed Power Meter 61
Characterizing an Optical Switch
optical switch. For the latter test, the electrical signal that is used to
command the switch is also connected to the external trigger input of the
PM-1600.
Testing Repeatability
The procedure to test the repeatability of an optical switch is relatively
simple. First, a reference measurement must be taken on each channel.
Repetitive transitions of the switch must then be performed and the total
deviation from the reference points will be considered as switch
repeatability.
To test repeatability,
1. Connect the instruments as shown below.
2. Set the power meter channels to the same wavelength as the source.
3. Set the power meter channels to Autorange mode.
4. Set the switch to the first position and take a reference measurement
on the power meter, selecting the active channel (the channel in
which the switch has a minimum insertion loss).
5. Set the switch to the second position and take a reference
measurement on the power meter, selecting the active channel.
HIGH-SPEED POWER METER PM-1600
dB W/W
ENTER
dBm/W Ref
Null
Chan
Range λ Avg Shift
Store
Recall
Program
Setup
Analog Out C1 C2 Ext. Trig Display
PM-1600
OPTICAL LIGHT SOURCE FLS-2100
On/Off
ENTER
CW Up
λ Modulation Down
Store
Setup
FLS-2100
Attenuation
ACTIVE
DUT
(optical switch)
Control signals
Performing Typical Tests with Your PM-1600
High-Speed Power Meter 61
Characterizing an Optical Switch
optical switch. For the latter test, the electrical signal that is used to
command the switch is also connected to the external trigger input of the
PM-1600.
Testing Repeatability
The procedure to test the repeatability of an optical switch is relatively
simple. First, a reference measurement must be taken on each channel.
Repetitive transitions of the switch must then be performed and the total
deviation from the reference points will be considered as switch
repeatability.
To test repeatability,
1. Connect the instruments as shown below.
2. Set the power meter channels to the same wavelength as the source.
3. Set the power meter channels to Autorange mode.
4. Set the switch to the first position and take a reference measurement
on the power meter, selecting the active channel (the channel in
which the switch has a minimum insertion loss).
5. Set the switch to the second position and take a reference
measurement on the power meter, selecting the active channel.
HIGH-SPEED POWER METER PM-1600
dB W/W
ENTER
dBm/W Ref
Null
Chan
Range λ Avg Shift
Store
Recall
Program
Setup
Analog Out C1 C2 Ext. Trig Display
PM-1600
OPTICAL LIGHT SOURCE FLS-2100
On/Off
ENTER
CW Up
λ Modulation Down
Store
Setup
FLS-2100
Attenuation
ACTIVE
DUT
(optical switch)
Control signals