Rigol DM858 - Figure 5.48 Db Operation Results; Table 5.19 Db Parameter Setting

Table 5.19 dB Parameter Setting
Parameter Description
Switch Enables or disables dB operation.
Operation Type Selects dB.
Relative dB Value
The range of the relative dB value is from
-120.00 dBm to 120.00 dBm. By default,
it is 0 dBm.
dB Operation Method
When enabled, the multimeter calculates the dBm value of the next reading and
subtracts the relative dB value from this value and then displays the result.
dB
= 10 x Log
10
[(Reading
2
/R
REF
)/0.001W] - dB relative value
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.
Figure 5.48 dB Operation Results
NOTE
Relative dB Value
• Input a relative dB value with a pop-up numeric keypad, and save it as a relative dB value.
• The relative dB value is stored in the volatile memory and will be cleared at power-off.
The range of the relative dB value is from -120 dBm to 120 dBm. By default, it is 0 dB.
Front Panel Operation
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