3 – 59
3.3
Example : If it is assumed that initial value B is 8.0 and current value A is 6.0, d(B) = 3.5 dB and d(A) =
7 dB can be obtained from calibration curve I. Therefore, d(A) - d(B) is 3.5 dB, which shows
that the current transmission power is a result of approx. 3.5 dB of attenuation.
Example of checking the transmission system
P.MON 6.0 Current value A = 6.0
Initial value B = 8.0
Calibration Curve I
Bar indication bar length
22
20
18
16
14
12
10
8
6
4
2
0
dB
Relative attenuation value d
The
measurement
precision
012 453678
AB
109
PERF. MONITOR
INFORMATION LABEL
DATE P. MON
'95 1/20 8.0
d (A)
d (B)
3.5dB
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