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Step 15. Read the S2P file for the modulator that was gener
-
ated in Step 10 from the SD Card or USB drive
(menu DE7A, left). This will de-embed the modulator
response from the set-up for an O/E measurement.
NOTE
If an S2P file is not available, it can be gen
-
erated from the characterization data pro
-
vided by the vendor. This is explained on
page 8-74.
An O/E measurement of a photo-receiver is shown in Figure 8-39 be
-
low. The S21 measurement represents the transfer function of the
photo-receiver and S22 represents the electrical return loss.
37xxxE OM 8-73
MEASUREMENTS OPTICAL APPLICATION
MENU DE7A
O/E MEASUREMENT
TRANSFER STANDARD
TO BE DE-EMBEDDED
(MODULATOR)
READ S2P FILE
FROM SD CARD
READ S2P FILE
FROM USB DRIVE
PRESS <ENTER>
TO SELECT
PRESS <CLEAR>
TO ABORT
Figure 8-39. O/E Measurement of a Photo-receiver