Fluke OF-500-01 OptiFiber, Техническое справочное руководство, Страница: 116 / 278

OF-500 OptiFiber Certifying OTDR
Technical Reference Handbook
3-40
Figure 3-15. OTDR Functions Menu
ajt69f.eps
C
New Comparison Trace from Memory: Lets you
select a new trace from memory to compare to the
reference trace.
D
Turn Off Trace Overlay: Removes the reference trace
from the OTDR plot.
E
Reference Trace/Comparison Trace: The traces and
wavelengths currently selected for the trace overlay
function. To select or deselect a wavelength,
highlight a trace name; then press
t
.
F
OTDR PLOT GRID: Turns the OTDR plot grid on and
off.
G
MARKER DELTA MODE: Sets the mode for the
measurement cursors on the OTDR plot:
•
Δ
distance
Δ
dB: The cursor readout shows the
difference in the power levels (in decibels)
between the cursors.
•
dB per unit distance: The cursor readout shows
the power loss (in decibels) that would occur
over 1 km or 1 kft of cable based on the loss
between the cursors.
A
New Reference Trace: Turns on the trace overlay function.
Lets you select a new reference trace from memory.
B
Measure New Comparison Trace: Runs the OTDR test to get a
new trace to compare to the reference trace.
A
B
C
D
F
G
E