U
SER
M
ANUAL
750000992/16
7-7
MTS
e
Display of WDM results
Cursors
To move the A (or B) cursor by pressing the cursor key, first display <Cursor A>
(or <Cursor B>), then use the < or > arrow keys.
To move both cursors simultaneously, press the cursor key to display the <Curs.
AB> key, then use the < or > arrow keys.
The coordinates of the intersection point of the cursors with the trace are
indicated underneath the trace as well as the frequency difference (or the
wavelength) and the power between these points.
Trace shifting
To shift the trace horizontally or vertically, press the <Shift/Zoom> key to
display <Shift>, then use the direction arrow keys to make the required shift.
Zoom
In order to zoom in on the trace, press the <Shift/Zoom> key to display
<Zoom>, then use the direction arrow keys to zoom in either horizontally or
vertically.
The zoom of the display is made around the selected cursor. If <Cursor AB> was
selected the zoom is made at the mid point between the cursors.
Note
To reset the zoom and see the full trace, press and hold simulta-
neously the
<
and
>
keys.
The position of the displayed part of the trace with respect of the complete trace
is located by a (grey or yellow) line on the top of the trace window.
You can also manually zoom in on a part of the trace defining the start and/or
end of the screen in the OSA test-set menu (Display windows). In this case, the
channels which are out of the screen limits are not in the result table.
Successive zooms on each event
•
Zoom in on one of the event.
•
Press the <Event> key.
•
Use the
<
and
>
keys to move successively the display window on each
event.
Threshold of channel detection
On the trace some peaks corresponding to a noise could be mistaken for
channels. It is therefore necessary to set a power threshold level: only peaks
exceeding the threshold will be considered as channels and included in the
results table.
This threshold is represented by a red horizontal line on the trace:
To display this threshold or not, press the <Expert> key then the <Threshold>
key:
•
if the key indicates <Threshold> the threshold is displayed and can be moved
using the "
↑
" and «
↓
» arrow keys;
•
if the key indicates < Threshold Off> then the threshold is not displayed.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com