ECE 3235 Electronics II
Experiment # 1
Introduction to Data Acquisition Laboratory
1. General Information
The objective of this experiment is to teach skills needed for basic operation of the
software and hardware equipment used in Data Acquisition Laboratory (DAL). The DAL
is equipped with professional, computer-based measurement instruments. These
instruments are clustered into workstations connected to a single Laser Writer located in
the lab. Within the workstation the testing instruments are integrated through HP-IB with
DELL workstations with Corei5 processors.
Fig 1 Data Acquisition Laboratory
This introductory experiment is organized as follows. First, the Agilent 33120A Function
Generator / Arbitrary Waveform Generator and the E3631A Power Supply user's guides
are provided, followed by information on the Tektronix TDS3012B digital oscilloscope
(note that two lab stations have now the new MSO2014 mixed-signal oscilloscope).
Finally, a small test circuit is constructed and evaluated using the equipments.
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2. Agilent 33120A Function Generator
The Agilent 33210A Function Generator can provide arbitrary waveform for input to the
circuit that you are going to build. This is very convenient and useful for testing circuit.
Go to the link http://www.agilent.com/ to connect to the Agilent website. Search for the
33120A and review the information provided for the function generator.
Fig 2 Agilent 33210A Function Generator/Arbitrary Waveform Generator
Note: It is essential that the output terminal be terminated with 50 Ohm resistor for
optimum performance! (see the test circuit in Fig 5)
3. Agilent E3631A Power Supply
Agilent E3631A Power Supply gives the desired voltage supply to the circuit, e.g.
operational amplifier.
Go to the following link http://www.agilent.com/ to connect to the Agilent website.
Search for the E3631A and review the information provided for the power supply.
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Figure 3 - Agilent E3631A Power Supply
4. The Tektronix TD3012B Digital Oscilloscope or
MSO2014 Mixed-signal Oscilloscope
Oscilloscope can display the output waveform. Go to the following link
http://www.tektronix.com/ to connect to the Tektronix website. Search for the TD3012B
or MSO2014 and review the information provided for the oscilloscope.
Figure 4 The Tektronix TD3012B Digital Oscilloscope.
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5. Data Collection with the Scope, Function Generator,
Power Supply
Build the following circuit.
Figure 5 Test Circuit.
Set the Agilent 33120A Function Generator
- Set Amplitude = 5Vpp
- Set Frequency = 10KHz
- Set Signal = SINE
Set the Tektronix TD3012B Digital Oscilloscope
- Turn on Channel 1 and 2 by pressing CH1 then CH2 keys.
- Select channel 1.
- Press AUTOSET key.
- While Channel 2 is selected, set the voltage/division field so that it equals to the
volts/division settings of channel 1.
- Gradually lower the frequency of the function generator.
- Adjust the timebase so that 3 periods are displayed. Keep lowering the frequency (you
can do it fast) until you reach the lower limit of Function Generator. Observe the low
pass filter characteristic.
Provide 3 sketches of the input and output at different frequencies to show the low pass
filter.
Set the function generator to 10 Hz, use the manual measurements of the scope to
precisely measure the frequency (CURSOR and SELECT). Press CURSOR key to
activate and rotate the knob to move the cursor to the desired location on the waveforms.
Use SELECT to toggle between cursors. (Do not show more than 3 cycles when
measuring).
Record the delta (period) and the frequency of the input.
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Set the function generator to the maximum frequency.
Record the delta (period) and the frequency of the input.
Reset the function generator to 5Vpp and 10kHz. Manually measure the peak-topeak voltage of the waveform. Make sure that the source points to the channel 1. Use
Cursor, Select and rotate the knob to manually do the measurement.
Record delta V for the input signal.
Automatically measure the period, frequency, and Vpp by using the MEASURE
menu function controls to take pre-defined automated measurements of waveforms.
Record the period, frequency and Vpp of the input. Compare the manual measurement
results with automatic. Any comments?
Set the Agilent 33120A Function Generator
- Set Amplitude = 5Vpp
- Set Frequency = 1KHz
- Set Signal = SINE
Set Tektronix TD3012B Digital Oscilloscope
- Press AUTOSET key
- Both CH1 & CH2 should be on. You can skip it if it is already done.
This exercise demonstrates how to manually and automatically find the delay between
two waveforms and then calculate the phase shift. Note that phase shift is equal to
(delay/period)*360.
Using the cursors, manually measure the delay and period of the waveforms.
Automatically measure the delay and period of the waveforms. Note that delay
measurement asks for two sources that will be subtracted. For this exercise enter channel
1 and channel 2.
Record the automatic measurement delay and period of the waveforms.
Calculate the phase shift using the manual delay value.
Calculate the phase shift using the automatic delay value
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