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WaveSurfer 3000 Oscilloscopes
Vertical
Vertical, also called Channel, settings usually relate to voltage level and control the trace along the Y axis.
NOTE:While Digital settings can be accessed through the Vertical menu on oscilloscopes with the Mixed
Signal option, they are handled quite differently. See Digital.
The amount of voltage displayed by one vertical division of the grid, or Vertical Scale (V/div), is most quickly
adjusted by using the front panel Vertical knob. The Channel descriptor box always shows the current
Vertical Scale setting.
If a Teledyne LeCroy probe is connected to the channel, a Probe dialog appears behind the Cx dialog.
Channel Settings
Volts/div sets the vertical scale (aka gain or sensitivity). Select Variable Gain adjustment or leave the
checkbox clear for fixed adjustment.
Offset adds a defined value of DC offset to the signal as acquired by the input channel. This may helpful in
order to display a signal on the oscilloscope grid while maximizing the vertical height (or gain) of the signal.
A negative value of offset will "subtract" a DC voltage value from the acquired signal (and move the trace
down on the grid") whereas a positive value will do the opposite. Touch Zero Offset to return to zero.
A variety of Bandwidth filters are available at a variety of fixed settings. The exact settings vary by model. To
limit bandwidth, select a filter from this field.
Invert inverts the waveform for the selected channel.
Coupling may be set to DC 50 Ω, DC1M, AC1M or GROUND (Gnd).
CAUTION. The maximum input voltage depends on the input used. Limits are displayed on the front
of the oscilloscope. Whenever the voltage exceeds this limit, the coupling mode automatically
switches to GROUND. You then have to manually reset the coupling to its previous state. While the
unit does provide this protection, damage can still occur if extreme voltages are applied.
Deskew adjusts the amount of horizontal time offset to compensate for propagation delays caused by
different probes or cable lengths. The valid range depends on the current timebase setting. The Math
deskew function performs the same activity.
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