Operation and Features
2
Math Operations
U3606B User’s Guide
67
dB measurements
Each dB measurement is the difference between the input
signal and a stored relative value, with both values
converted to dBm. When enabled, the dB operation
computes the dBm value for the next reading, stores the
dBm result into the relative value register, and immediately
produces the dB calculation. The formula used for
calculating dB measurements is:
The
relative value
can take any value between 0 dBm and
±120.000 dBm. The default relative value is 0 dBm. You can
either let the instrument automatically measure this value,
or you can enter a specific value.
dB
reading
in
dBm relative
value
in
dBm
–
=
N O T E
This math operation applies to voltage measurements only.
Enable the dB function
Enable the dBm function first.
The first displayed reading is always precisely 00.000 dB.
To disable the dB function
Содержание U3606B
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