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Measuring Power
Measuring Absolute and Relative Power
maximal and minimal value is displayed. The next sample replaces
the oldest value stored and the difference is calculated anew. The
display is thus updated from sample to sample.
By repeatedly pressing
and display mode to
• "Refresh": The display is not updated from sample to sample.
Instead, the instrument clears the window buffer and restarts.
The next value displayed is based on a completely new set of
samples.
• "Cont.": The window buffer is reduced to just two values. From
sample to sample the difference between the present and the
previous power value is calculated and updated continuously.
4 Press M
.
ORE
5 Press
P
to return to the "Powermeter" screen.
REVIOUS
Explanation of the Results
Depending on the "Mode" you have measured:
A-value
• the optical power received by head A
• the fractional power 10 log [P
• the ratio 10 log [P
A
B-value
• the optical power received by head B
• the fractional power 10 log [P
• the ratio 10 log [P
B
80
W
. M
you can set the measurement
IN
ODE
/ P
] = P
(dBm) – P
A
B
A
/ P ref] = P
(dBm) – P ref (dBm)
A
/ P
] = P
(dBm) – P
B
A
B
/ P ref] = P
(dBm) – P ref (dBm)
B
(dBm)
B
(dBm)
A
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