11
Set-up: Expert - Manual Setup
Note:
The Range, Pulse Width, and Averaging Time parameters are user-selectable if the [Setup]
parameter is set to [Manual].
Range
The [Range] parameter determines the distance range of the full (unzoomed) trace.
It also determines [Resolution] - the distance between data points in the trace: the
longer the range, the wider the data point spacing. We recommend selecting the
shortest distance range that is longer than the fiber under test. For example, to test
a fiber that is 1.5 km long, select the 2.5 km range. Available [Range] values:
Wavelength (nm)
Distance Range
Resolution (set by M200)
MM 850
MM 1300
MM 850/1300
< 4 km (13123 ft)
0.25 m (0.82 ft)
8 km (26246 ft)
0.5 m (1.64 ft)
16 km (52493 ft)
1 m (3.28 ft)
32 km (104986 ft) range/ 1600 m (range/ 5249 ft)
SM 1310
SM 1550
SM 1310 /1550
< 4 km (13123 ft)
0.25 m (0.82 ft)
8 km (26246 ft)
0.5 m (1.64 ft)
16 km (52493 ft)
1 m (3.28 ft)
32 km (104986 ft) range/ 1600 m (range/ 5249 ft)
Pulse
Width
The M200 can operate using different pulse widths. Short pulse widths provide the
shortest event and attenuation dead zones. Long pulse widths provide the best event
detection on long fibers.
Averaging
Time
The [Time] parameter determines the duration of a timed test. Available time
settings: 5 • 10 • 30 • 60 • 90 • 180 sec
Press the Left or Right arrow key to
display the desired option
Set-up: Events Menu Settings
User Thresholds Chart
Threshold
Min Value
Default Value
Max Value
Event Loss
0.05 dB
0.20 dB
1.0 dB
Event Reflection
-65.0 dB
-65.0dB
-45.0 dB
Event End
1.0 dB
6.0dB
6.0 dB
