User manual

WaveSurfer 3000/3000z Oscilloscopes Operator's Manual

Vertical Settings

The Trace On checkbox turns on/off the channel trace.

Volts/div sets the gain (sensitivity) in the selected Vertical units, Volts by default. Select Variable Gain for

fine adjustment or leave the checkbox clear for fixed 1, 2, 5, 10-step adjustments.

Offset adds a defined value of DC offset to the signal as acquired by the input channel. This may be helpful

in order to display a signal on the 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. To limit bandwidth, select a filter from this field.

Coupling may be set to DC 50 Ω, DC1M, AC1M or GROUND.

Caution: The maximum input voltage depends on the input used. Limits are displayed on the body

of the instrument. 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.

Invert changes the apparent polarity of the signal, substituting an equivalent negative value for a positive

one, and vice versa, so that the waveform appears to be "flipped" on screen.

Vertical Units may be changed from Volts (V) to Amperes (A). This is useful when using a third-party

current probe (which is not auto-detected) or when probing across a current sensor/resistor.

Probe Attenuation and Deskew

Probe Attenuation values for third-party probes may be entered manually on the Cn dialog. The instrument

will detect it is a third-party probe and display these fields.

When a Teledyne LeCroy probe is connected to a channel input, the Attenuation field becomes a button to

access the Probe dialog, a tab added to the right of the Cn tab. Enter Attenuation on the Probe dialog.

Deskew adjusts the horizontal time offset by the amount entered in order to compensate for propagation

delays caused by different probes or cable lengths. The valid range is dependent on the current timebase

setting. The Deskew pre-processing setting and the Deskew math function perform the same action.