Using The Cursor; The Zoom Function - Viavi COSA-4055 User Manual

Using the
cursor
Selecting a cursor
Displaying the y-
axis cursor
Moving the cursor
The Zoom
function
By means of the two cursors A and B following functions are available:
– displaying the power level at the cursor position
– measuring delta power and total power between two points
– zooming and shifting the trace according to the cursor positions
 Press the Cursor A/Cursor B softkey to select a cursor: A, B, A+B.
A selected cursor is displayed as a solid line, a deselected cursor is
displayed as a dotted line.
1. Press the Advanced softkey to open the menu.
2. Press the Cursor X/Cursor Y softkey to select Cursor Y.
The cursor can be moved on the trace from one measurement point to
the next or by jumping from one channel to the next (both forward and
backward).
To move the cursor on the trace:
1. Press the Cursor X/Cursor Y softkey to highlight the tab and to
select a cursor if needed.
2. Press the or
If both cursors are selected both cursors will be moved in parallel.
To jump from one channel to the next:
1. Press the Trace/Channel softkey to highlight the tab.
2. Press the or
Both x- and y-axis can be zoomed.
When zooming the x-axis the area to be zoomed is defined by the
selected cursor and its position:
– If only one cursor is selected, the cursor position is kept while the
areas left and right to the cursor are zoomed.
– If both cursors are selected the center between both cursors is kept.
To zoom the x-axis:
1. Select a cursor or both cursors and move them to the desired
position.
2. Press the Zoom/Shift softkey and select Zoom.
3. Press the or
MTS / T-BERD 5800 • COSA-4055 • User Manual 2016.01
Chapter 1 Optical Spectrum Measurement

key to move the cursor backward or forward.

key to jump one channel backward or forward.

key to reduce or enlarge the x-axis.
Result display
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