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User's Manual
1. Press the
the appropriate voltage scale.
2. Connect one end of the test lead to the multimeter, the red test lead to the Input-HI
terminal and the black test lead to the Input-LO terminal, as shown in Figure 2-15.
3. Set the parameter for dBm operation.
Press
→ [Calibration] →[Function]→[dBm ON] to select the dBm function, and use the
arrow keys to set the dBm operation to the reference resistance value in the hypothetical
circuit, that is 50 Ω. In this case, the screen display the reading is the power value of the
reference resistor.
Example 4 dB Measurement
The dB (decibel) is a commonly measurement unit and widely used in the fields of electrical
engineering, radio, mechanics, shock vibration, mechanical power and acoustics. The
following describes how to measure the power difference (dB value) between two circuits.
Method 1
Use Example 3 to measure the dBm1 and dBm2 of two circuits respectively.
Method 2
1. Press the
the appropriate voltage scale.
2. Connect one end of the test lead to the multimeter, the red test lead to the Input-HI
terminal and the black test lead to the Input-LO terminal, as shown in Figure 2-15.
3. Refer to dBm1 that measured by Example 3.
Instruments.uni-trend.com
key on the front panel to turn on the AC voltage measurement and select
Figure 0–74 dBm Measurement Menu
dB = dBm1-dBm2
key on the front panel to turn on the AC voltage measurement and select
UT8806E Desktop Digital Multimeter
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