User Manual

UTD1000L
User Manual
32
Autoset for Signals with DC Offset
UTD1000L Series is designed with powerful
autoset function that makes it possible to
perform fast and accurate measurement in DC
coupled mode for signals with any DC component.
Position parameter on upper right display of
screen: This parameter stands for position readout
for the channel reference marker that moves from
horizontal central line, if it is positive value, it
indicates the channel marker is above the
horizontal central line and the negative one is for
the marker below the horizontal central line. To
work out the final DC offset, first move the
waveform to the center of the scree
n, then multiply
the Position value by current amplitude range
readout that is final DC offset result you want
For example:
Connect UTD1000CL channel with 70mVpp AC
sine signal mixed with 1.1V DC offset set the
channel to DC coupling, then perform AUTO
function the waveform in Figure 4 24A will
show on the screen. On the display, Position
readout 53.63div indicates the channel
reference marker moves 53.63div downward from
the horizontal central line The current
amplitude range is 20mV/div so DC offset
readout 20mV/div 53.63div =1.0726V
Vpp readout: 72mV means the AC peak to
peak value of the
signal
You can also directly read out the DC level
through AVG value.
AVG value: 1.0726V which stands for the
signal DC level
Through all parameters mentioned above, the
signal can be understood very easily.
Note: For UTD1000DL models CH1 and CH2
are both set to DC coupling when inputting the
signal above then perform the AUTO function
after that also move the waveform to the center
of the display(See Figure4-24B and then
calculate DC offset with use of Position readout
and current amplitude range value
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