User manual

A&D Board User Manual and Test Procedure

Digital Clock

1. [ ] Remove the red and black mini-grabbers from the 10kΩ resistor.

2. [ ] Turn the TDS210 CH1 VOLTS/DIV knob one click clockwise to indicate 2.00 V/division.

3. [ ] Connect a 10k

Ω resistor between the A&D Board CLK and GND socket connectors.

4. [ ] Connect the scope probe mini-grabbers across the 10k

Ω resistor, black to GND.

5. [ ] Note that the LED, next to the CLK socket connector, glows green and red. This indicates that the

digital clock circuit is oscillating.

6. [ ] Turn the A&D Board CLK FRQ (clock frequency) knob fully counter-clockwise.

7. [ ] Press the TDS210 AUTOSET button. The waveform that appears should look like Figure 8.

Figure 8: Oscilloscope Display of 60 Hz Digital Clock

8. [ ] Press TDS210 Source/Type to highlight Source.

9. [ ] Press each button, below Source/Type to choose CH1 for each field.

10. [ ] Press Source/Type to highlight Type.

11. [ ] The first two fields are already set to “Mean” and “Pk-Pk”. Set the remaining two fields to “Cyc RMS”

and “Freq”.

12. [ ] Verify that the Digital Clock is producing a square wave, with about 5V Pk-Pk and 60 Hz Frequency.

The waveform should rise and fall quickly, with flat tops and bottoms.

13. [ ] Slowly turn the A&D Board CLK FRQ knob clockwise. As the frequency increases, more cycles are

shown on the TDS210 display.

14. [ ] Continue increasing the Digital Clock frequency, until the TDS210 display becomes a black rectangle.