RIGOL
© 2007 RIGOL Technologies, Inc.
User‟s Guide for DM3000 Series
3. dB Measurement
The dB function applies to AC voltage and DC voltage measurements only.
Each dB measurement is different between the input signal and a stored relative
value, with both values converted to dBm.
Press dB, enter the menu shown below:
Figure 2- 16
Table 2- 13 dB Measurement Function Menu Function Description
Save all changes, back to a higher level menu.
dB =10xLog
10
[ (Reading
2
/ R
REF
) / 0.001W ] – (dB setting value)
R
REF
expressed measuring the resistance value in the actual electric circuit.
Range of the dB setting value: -120 dBm ~ +120 dBm. The default is 0 dBm.
You can either let the instrument automatically measure this value, or you can enter
a specified value.
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