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dB-difference measurement (function group dB REF)
5 Operation
USM 36
Issue 2 (12/2013)
5-39
Echo height comparison
You can compare the echo from any chosen reflector
with the reference echo.
The following values are available for indication in the
measurement line:
●
dBrA
dB-difference between the reference echo and the
highest echo in the gate A.
●
A%rA
Amplitude of the signal in the gate A in percent re-
ferred to the reference amplitude as 100 %.
●
dBrB
dB-difference between the reference echo and the
highest echo in the gate B.
●
A%rB
Amplitude of the signal in the gate B in percent re-
ferred to the reference amplitude as 100 %.
Note
The dB-difference is independent of any pos-
sible gain variation.
– Switch to the function group
EVAL
on the second op-
erating level.
– Use the functions
READING
to choose one or sever-
al values to be indicated in the measurement line.
– Position the gate A on the echo.
– Select the function
MODE
and then the setting
ON
to
turn on the function.
The selected readings are then indicated in the mea-
surement line.
Содержание 37 400
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Страница 21: ...USM 36 Issue 2 12 2013 1 1 Introduction 1 ...
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Страница 253: ...USM 36 Issue 2 12 2013 9 1 Appendix 9 ...
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Страница 279: ...USM 36 Issue 2 12 2013 10 1 Specifications 10 ...
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