RIGOL M300 - Manual (Page 64)

RIGOL
© 2007 RIGOL Technologies, Inc.
User’s Guide for DM3000 Series
2-16
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- 13 dB Measurement
Table 2- 13 dB Measurement Function Menu Function Description
Function
Menu
Description
Default Use the default value.
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.