Setting the Wavelength/Frequency and FWHM Values
24
XTA-50 User Guide
a. In the
FWHM
area, touch the gauge.
The virtual keypad appearing on screen is initialized with the value
corresponding to the point you have touched on the gauge.
b. Enter the wanted FWHM value using the virtual keypad.
The available FWHM values are detailed in section
Technical Specifications, p. 9
FWHM Constrain
on Central
Wavelength
, the minimum (and maximum) central
wavelength reachable value is constrained by FWHM.
•
λ
1
is the minimum central wavelength reachable with FWHM
1
.
λ
1
=
λ
min
+ FWHM
1
/2.
•
λ
2
is the minimum central wavelength reachable with FWHM
2
.
λ
2
=
λ
min
+ FWHM
2
/2.
Figure 8: Wavelength/Frequency constrained by FWHM
4.2
Selecting a Channel by Using an ITU Grid
4.2.1
Using a Predefined Grid to Select a Channel
Subject
The
ITU Grid
function enables you to use a predefined ITU grid to quickly select a
channel.
This function is not available for O-band models of the XTA-50.
Procedure
1.
In the
Operating Mode
window, touch the
ITU Grid
button.
The
ITU Grid Selection
window appears.
max-3dB
λ
min
FWHM
1
λ
1
FWHM
2
λ
2
Summary of Contents for XTM-50 O-band
Page 1: ...www EXFO com XTA 50 Optical Tunable Filter User Guide XTA 50_UG_2 1v2 3...
Page 2: ......
Page 18: ...Installing and Connecting the XTA 50 18 XTA 50 User Guide...
Page 22: ...Turning on off the XTA 50 22 XTA 50 User Guide...
Page 62: ...Performing Basic Maintenance Operations 62 XTA 50 User Guide...
