Velleman PCSU1000 DSO - Manual (Page 6)

PC Oscilloscope PCSU1000 5
© 2005 ... Velleman
TIME/DIV
Selects the time setting for the beam to sweep one major division on the screen
By selecting different TIME/DIV settings it is possible to zoom the frozen waveform on the screen.
TRIGGER On/Off
Selects free run mode or trigged mode.
TRIGGER Level
Selects the signal level at which the sweep is triggered.
Triggering reference mark is displayed with the horizontal line on the left side of the screen.
TRIGGER Channel
Selects the trigger source signal (Ch1, Ch2 or Ext)
TRIGGER Edge
Selects the triggering slope:
Arrow up: Trigger occurs when triggering signal crosses trigger level in a positive going direction.
Arrow down: Trigger occurs when triggering signal crosses trigger level in a negative going direction.
>|<
Resets the triggering x-position reference point. Triggering reference mark is displayed with the
vertical line on the bottom of the screen.
RUN
Selects recurrent display update mode (RUN). Pressing the button again freezes the display.
SINGLE
When button is depressed and the trigger level is reached, refreshment of the display takes place
only once.
X-POSITION SCROLLBAR (Below the waveform display)
Positions the trace horizontally on the screen. Triggering reference point is displayed with the vertical
line on the bottom of the screen.
S/L
Button selects linear (L) or sine(x)/x (S) interpolation. Linear interpolation connects the data points
with straight lines. Sine(x)/x interpolation uses curves to connect the data points. This smoothed
interpolation gives better waveform display at highest sine frequencies. Linear interpolation is better
for step signals. The S/L selection effects only at TIME/DIV settings 0.2 and 0.1us.
Note: Sine interpolation can result in incorrect top-top signal displaying, at frequencies above 5MHz.
1GS/s
This 1GS/s sampling rate is in use on 0.2us/div, 0.1us/div, 0.05us/div and 0.02us/div ranges.
CH1 + CH2
CH1 - CH2
XY Plot
INV. CH2
This button appears only in math mode. Toggles between math mode and normal mode.
Tip: Use Wheel Mouse's scroll wheel to fine adjust the triggering level and traces' y-position.
1.4 Connection
Connect the oscilloscope unit to the USB port.
For Circuit Analyzer (Bode Plotter) option connect function generator PCG10 or K8016 to LPT1,
LPT2 or LPT3.
To select the LPT port address for the function generator click Hardware Setup on Options menu or
select it from Pc-Lab2000 startup screen.