Rigol M300 Manual do Utilizador descarregar pdf (Página 64)

RIGOL

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

Description

Default

Use the default value.

Save all changes, back to a higher level menu.

dB =10xLog

[ (Reading

/ R

REF

) / 0.001W ] – (dB setting value)

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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