RIGOL Chapter 2 Front Panel Operations
User’s Guide for DM3068
dBm
dBm represents the absolute value of the power. The dBm operation calculates the
power of the reference resistance according to the measured voltage.
dBm = 10 x Log
10
[ (Reading
2
/ R
REF
) / 1 mW ]
Wherein, Reading denotes the measured voltage and R
REF
denotes the reference
resistance.
Press dBm to enter the following interface, from which you can use the direction
keys to specify a reference resistance within 2 Ω and 8000 Ω. The setting is stored
in volatile memory and will be cleared automatically at power-off.
Default: restore the reference resistance to 600 Ω.
On: enable dBm operation. The multimeter then automatically goes to the
measurement main interface, as shown in the figure below.
The status bar displays “dBm”.
The dBm operation result is displayed at the center of the screen.
The current measurement reading and the reference resistance are displayed
at the lower left corner and lower right corner of the screen respectively.
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