GW Instek GDM-8245 - Dbm Measurement; Dbm Dbm Measurement; Measure Dbm

ADVANCED MEASUREMENT
39
dBm Measurement
Applicable to
Background
Using the ACV/AC mV, DCV/ DC mV or AC+DC
V
oltage measurement result, the GDM-8245 calculates
the dBm value based on a reference resistance value in
the following way.
dBm 10 x log10 (1000 x Vreading
2
/ Rref)
Parameters Vreading Input Voltage, ACV or DCV
Rref Reference impedance simulating an output
load
Measure dBm
1. Activate dBm
Press the Shift key followed by the
(dBm) key.
2. dBm result
appears (the
secondary
display)
dBm Indicates dBm measurement.
Primary
display
Indicates voltage.
Deactivate dBm
measurement
To cancel the dBm measurement,
press the Shift key followed by the
key, or simply activate another
measurement.