Agilent Technologies N4373A User Manual page 128

Introduction
Agilent N4373A Lightwave Component Analyzer, First Edition
3 Connect the LCA RF Output to the RF Input connector of
the optical test set.
4 Connect the LCA RF Input to the RF Output connector of
the optical test set.
5 Connect the optical fiber patch cord from the LCA Optical
Output connector Optical Input connector of the optical
test set. Make certain that the fiber faces are clean.
6 Then activate the laser source with the key switch on the
optical test set.
7 Connect the optical fiber patch cord from the LCA Optical
Output connector to the Optical Input connector of the
optical test set.
8 In the User Interface Display, select the optical- to- optical
measurement by starting the O/O Measurement mode.
Set the correct wavelength in the macro setup and with
the wavelength switch on the optical test set. With the
connections of Steps 3- 5, run the optical calibration.
When the instrument reports "Ready to Measure", press
OK.
9 At the top of the measurement graph, the O/O
Measurement setting is now indicated. Without changing
the connections, save a measurement trace under the
name ooIntRec. This curve is expected to show 0 dBe
over the system bandwidth range, within the O/O noise
level, since the measurement represents the signal with
respect to the reference calibration.
10 Then disconnect the fiber patch cord and connector
adapter from the LCA Optical Input so that the Optical
Input connector can be darkened with a black rubber cap.
The measurement now represents the dark limit for
minimum measurable responsivity. Save a measurement
trace under the name ooDark.
11 If the LCA has another wavelength available, repeat Steps
nd
7- 9 for the 2 wavelength and save the corresponding
files in a separate directory for the 2
12 In the User Interface Display, select the optical- to-
electrical measurement by starting the O/E
Measurement mode. Set the correct wavelength in the
next macro setup panel and with the wavelength switch
on the optical test set. If Measure Mode is available,
choose Single- End.
13 Reattach the optical fiber as requested in the next panel
and as described in Step 5. Then run the optical
calibration. When the instrument reports "Ready to
Specifications and Regulatory Information
nd
wavelength.
127