SDM3055 Series Digital Multimeter User Manual
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Example 3: dBm Measurement
dBm is commonly used in audio signal measurement. The following will introduce you how to measure
dBm value.
Operating Steps:
1. Press on the front panel to select AC Voltage measurement function and choose a proper
voltage range.
2. Connect the red lead to terminal Input-HI and black lead to terminal Input-LO as Diagram 2-9.
3. Set the dBm parameters.
Press → [Statistics] to turn on the statistics function and set the selective value of dBm as
a reference value within supposed circuit by using direction keys: 50Ω.
Diagram 3-6 Select Reference Resistance as Measurement Value
4. Press [Done] to return to the higher-level menu. At this time, the reading shown on the screen is
the Power value of reference resistance.
Diagram 3-7 dBm Operation Result
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