Keysight Technologies N4374B, User Manual

Page: 83 / 164

Making Measurements
Keysight
N4374B Lightwave Component Analyzer, User’s Guide 81
• The frequency dependent transmission behavior of optical
transmitters cannot be characterized as accurately as the
behavior of receivers. The factory calibration ensures the
uncertainty specified, but particularly for improved
results at lower frequencies, this may be slightly improved
by performing a user calibration. In this case, select
“Measure”.
• If you want to reuse an existing, saved calibration, select
“Load”, and select the file from the Windows Explorer
window.
9 Click to start the measurement preparation.
If you are performing a user calibration , when the following
screen is displayed, make sure the optical output is
connected to the optical input using the patchcord supplied.
The patchcord has the following part number:
• Single-mode angled/angled connector: N4373-87906
• Single-mode angled/straight connector: N4373-87907
Please also refer to the documentation supplied with the
patchcord.
a Select “Reduce IFBW for user calibration measurement” to
reduce noise on the user calibration data. The default
N O TE
Optical path and electrical path deembedding is not applied during a user
calibration.