Kusam-meco M3500, Manual

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CALCulate:FUNCtion DB
CALCulate:STATe {OFF|ON}
CALCulate:STATe?
CALCulate:DB:REFerence {< value >|MINimum|MAXimum}
dBm Definition
With dBm selected, a voltage measurement is displayed as the level of
power, relative to 1 milliwatt, dissipated through a reference resistance.
The reference resistance is adjustable in M3510A/11A. The calculation of
dBm is defined as below:
mW
Z
V
dB
ref
in
m
1 / log 10
2






× =
※
Note 1:
in
V
is the input signal voltage.
ref
Z
is the reference
resistance.
※
Note 2: Change of reference resistance will not affect the stored
relative reference value.
※
Note 3: The Zref is adjustable with a range from 50Ω to 8000 Ω. The
default value is 600 Ω.
※
Note 4: The defined selected reference value is stored in a non-volatile
memory and will be cleared after the multimeter has been power-off.
※
Note 5: This feature is available for DCV and ACV only.
How to set the reference resistance
You can set the reference resistance either through the front panel
operation or the remote interface operation.
Front Panel Operation
1. Select a measurement function by pressing DCV or ACV button.
2. Do the procedure SHIFT + NULL > dBm > ENTER > REF RES to
access the setting.
3. Use
◁
and
▷to
move through the digits and
△
and
▽
to increase
or decrease the numbers to a desired value. Press ENTER to set the
value.
4. Press ENTER on “RUN” to start measurement.