TEXIO DL-2060, Инструкция по эксплуатации, Страница: 70 / 152

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3.3.7 dB/dBm
A. dB
Definition
dB function will dB(decibel) indicates the difference after dBm convertion of both
measured value and saved relative value. The dB measurement is applied to DC and AC
voltage only. The range for the relative value is between 0
dBm and 200 dBm. The
relative value is adjustable and is stored in a volatile memory.
dB = (Input signal in dBm) – (Relative value in dBm)
How to make a dB measurement
User can either manually select a number for the relative reference or let the multimeter
take the first reading .
※
Note: Press SHIFT+dB(NULL) again to disable this feature. The “MATH” anunnciator
on the display indicates the state of a mathematical feature.
Front Panel Operation
Method 1
：
Manual setup of relative value
Press SHIFT+ dB(NULL) buttons, and then use
◁
and
▷
to move through the
digits and
△
and
▽
buttons to increase or decrease the numbers to your desired value.
Press ENTER to set the value. The locations of the buttons are shown with red rectangle
frames in
Figure 4-21 .
Figure 4-21
Method 2
：
First measured value as relative value

Select the measurement function by pressing one of DCV and ACV buttons.

Enable the dB operation by pressing SHIFT + dB(NULL) buttons.

After enabling the dB operation, user can set or alter the dB relative value as
mentioned above.

Observe the displayed reading.