VT DSO-2A20 Manual Rev. 1.1
Virtins Technology
need to do this every time after you change the sampling parameters. If “No” is chosen
instead, the software DC compensation will have no effect.
For VT DSOs that support hardware offset adjustment, it is recommended to use that
function for zeroing instead (described in the following sections). To make sure that the
software DC compensation is inactive, go to [Setting]>[Calibration] and check the “Input DC
Offset”, make sure that the values are zero for both channels.
1.6 Probe Calibration
Connect the probe (at
×
10 position) to the 1 kHz square wave output of the DSO, and then
adjust the sampling parameters such that the waveform displayed on the screen can be clearly
seen. You can also do this by simply clicking the “Auto” button at the upper right corner of
the screen.
Adjust the probe compensate capacitor at the end of the probe cable such that the square
wave looks normal, as shown below.
For VT DSOs (such as VT DSO-2810R and VT DSO-2820R) that do not have a built-in
analog signal generator, the probe calibration signal is generated digitally and output via a
dedicated pin.
For VT DSOs (such as VT DSO-2810 and VT DSO-2820) that have a built-in band-limited
(<5MHz) analog signal generator, the probe calibration signal is generated digitally and
output via the signal generator output BNC when the analog signal generator is not running.
For VT DSOs (such as VT DSO-2810E and VT DSO-2820E) that have a built-in wide-band
analog signal generator, the probe calibration signal is generated analogously and output via
the signal generator output BNC when the signal generator is not running. You can also
generate it using the signal generator.
The probe calibration output can be configured via [Setting]>[DAC Device] (see figure
below).
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