Figure 5.45 dBm Parameter Setting Interface
Table 5.18 dBm Parameter Setting
Parameter Description
Switch Enables or disables dBm operation.
Operation Type Selects dBm.
Relative Resistance
The settable range is from 50 Ω to 8000
Ω.
dBm Operation Method
The dBm operation calculates the power of the reference resistance according to the
measured voltage. The formula is as follows:
dBm = 10 x Log
10
[(Reading
2
/R
REF
)/0.001W]
Wherein, Reading denotes the measured voltage and R
REF
denotes the reference
resistance.
Take DCV measurement as an example, the calculation results are displayed in the
secondary display area, as shown in the following figure.
Front Panel Operation
Copyright ©RIGOL TECHNOLOGIES CO., LTD. All rights reserved. DM858 Series User Guide
77
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