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NT2-210018 Optical Spectrum
Analyzer User Guide
6176 E. Molloy Rd. East Syracuse, NY 13057 U.S.A. • [email protected] • 1-800-800-6652 • +1 315-431-7200 • www.ppc-online.com
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Gain Tilt
Gain Tilt, is displayed as a linear regression analysis of change in power between the overlapping channels overlaid
on the graph comparing two scans. This reading only factors in the channels that are greater than the minimum
power level of the scale. This is useful when balancing gain from EDFA systems.
NOTE
Gain Tilt requires two scans be compared. See below for dual scan operation procedures.
NOTE
All the scan data on the display is the data associated with the primary trace.
There are two methods to display dual scans for a Gain Tilt comparison
With New Scan
Use a scan that has just been acquired using the Scan button. After a scan has been taken, bring up the Icon
menu and select the File Management icon. Make sure the OSA table is highlighted and touch above the blue
highlighted center point to move up through the file list and below to move down the list. With the desired
scan highlighted, touch the Compare icon and the saved OSA scan will be displayed on the screen with the
scan that was just acquired. Please refer to Section 10 for more information on using the file manager. Gain Tilt
only measures those channels that meet the minimum value of the displayed scale.
With Saved Scans
The second method is to use two scans that have already been stored. To do this, enter the file manager as
described and with the OSA tab highlighted, select the primary scan to be used. Touch the file name while it is
highlighted to open it or use the Select button on the keypad. Do not use the Select icon on the file manage-
ment screen. Enter file management again and with OSA tab highlighted, move the file to be compared to the
highlighted bar and touch the Compare icon. The primary trace will be the first one selected.
To exit the Gain Tilt mode, open a different scan file or start a new scan. To exit the Gain/Power Tilt modes and
return to the total power mode, enter the Icon menu, select the View Parameter, select Total Power and Save.
Measurement
Depending on the system, channels my be listed in wavelength or frequency. To accommodate this, the NT2-210018
may be set to display in nanometers (nm) for wavelength or terahertz (Tz) for frequency. To change these settings, pull
up the Icon menu and touch the Settings icon. Touch Measure Setting, choose frequency or wavelength then touch
Save.
Zoom
The Zoom button is used to zoom in on a specific set of contiguous channels. If the set of channels to be viewed
is channel 20 to 50 for instance, this feature allows the user to set this range, and by pressing the Zoom button on
the keypad, shows only those channels. To set the zoom span, pull up the Icon menu and select the Setting screen.
Touch the Zoom setting and with the Begin tab highlighted, use the up and down arrows on each digit to set the
first channel to be viewed. To set the last channel, highlight the end tab and set this channel in the same manner as
the beginning channel. Touch Save and touch the Scan icon to return to the graph screen.
8.2 General Parameter Tab
Brightness
Depending on working conditions, a lower level of light may be best for optimal viewing of the OSA. Use this
Brightness setting to toggle between dim and bright settings. To set the brightness level, enter the Settings screen
by bringing up the Icon menu and touching the Settings icon. Touch the General tab and then touch the Brightness
