Luna 4600 - Continuous Scan Mode

Optical Backscatter Reflectometer 4600 43
User Guide
4
10 Click Scan in the System Control area (Figure 4-6).
The instrument performs the measurement and the software displays the test data
in the upper graph.
Note that even if Options > Display Options > Auto-Update Lower Graph
is off (unchecked), data may appear in the lower graph window from a previous
scan. To update the lower graph based on the current time domain data, see
“Updating Lower Graph” on page 67.
Continuous Scan Mode
Continuous scan mode takes advantage of the fast measurement speed of the OBR
to monitor devices whose properties may change slowly with time.
Important For accurate measurements, the device must change
slowly enough that its properties remain constant while
data is acquired.
Note that continuous scan mode will operate more quickly if the lower graph area
is
“turned off” by unchecking Options > Display Options > Auto-Update Lower
Graph. To view this data after scanning, see “Updating Lower Graph” on page 67.
To scan continuously
1 Perform all but the last step of a the Single Scan mode above. Before
clicking the Scan button, select Continuous Scan in the System
Control area of the main window.
2 Optional: To gain more speed, uncheck Options > Display Options >
Auto-Update Lower Graph.
3 Click Scan in the System Control area (Figure 4-6).
4 The Scan button will turn gray during continuous scanning.
The active graph window(s) will update after each scan.
5 To stop scanning, either press the grayed Scan button again, or uncheck
the Continuous Scan box above the Scan button.