Using the OSICS SWT Module
OSICS User Manual
147
11.4.2 Verifying the Repeatability
Subject
This procedure verifies that the SWT module repeatability is within specification range
over 100 measurements for each channel.
The following figure illustrates the appropriate setup to perform the repeatability test:
Figure 104: SWT Performance Test – Repeatability
Before Starting
Make sure you have the appropriate power-meter (see section
).
Procedure
1.
Disable all laser source outputs and other modules in the OSICS Mainframe.
2.
Connect the measurement equipments as indicated on
3.
If you are using an OSICS T100 or OSICS DFB as the external source, enable the laser
output.
4.
Enable the output channel under test (in our example
Ch1
) and record the power
output value P1 and P2 provided respectively by OPM1 and OPM2 after the power
reading has stabilized.
5.
Select dBm as the power-meter measurement unit and hold the range on OPM2 for
better accuracy.
6.
Turn off and on Ch1 for 100 times, and record each time the power reading P1 and P2
(in dBm) on both power-meters OPM1 and OPM2.
7.
Subtract OPM2 reading from OPM1 reading (P1-P2) for each of the 100
measurements and record the result.
8.
Find the maximum (|P1-P2|
max
) and minimum (|P1-P2|
min
) values among the |P1-P2|
records calculated in step 6. above.
9.
Subtract the maximum and minimum values to get the module repeatability.
10.
Verify that the calculated repeatability value is within the specification range of
0.02 dB.
11.
Perform the same operations for the second OSICS SWT module channel.
Power-meter
OPM1
Coupler
Laser source
In
Out1
Out2
OSICS
SWT 1x
n
Power-meter
OPM2
Ch1
Chn
Com
