GW Instek GDM-8300 series User Manual - Manual (Page 65)

OPERATION
65
Measure dB
dB is defined as [dBm−dBmref]. When the dB measurement is
activated, the DMM calculates the dBm using the reading at the
first moment and stores it as dBmref.
Procedure 1. Select ACV or DCV measurement. See page 33.
2. Press SHIFT → Ω/ key to activate the dB
measurement mode.
The 1st display shows the dB reading the
second display shows the voltage reading.
Display
dB
measurement
Voltage
reading
dB
S DC
V
View the dBm
Reference Value To view the dBm reference value, press the
2ND key.
The Up and Down arrow keys can also be used
to change the voltage range or the reading.
Exit dB
Measurement Press the SHIFT → Ω/ key again to exit the
dB measurement, or simply activate another
measurement function.