Hands on with NI ELVIS-II+

Objective:

• Test different Components given with NI ELVIS Instrument Launcher.
• Design a function generator in LabVIEW generate the waveform through any Analog OUTPUT Port of ELVIS and show it on the SCOPE of Instrument Launcher.
• Design a Passive Low Pass and High Pass filter over the ELVIS board and observe its frequency response on the Bode Plot of Instrument Launcher. Compare the Theoretical and Practical result of Cut-off frequency.

Apparatus Required:

• NI ELVIS-II+.
• Power and USB cord.
• Testing components.
• BNC and Banana probe.
• 
  

Theory:

ELVIS stands for Educational Laboratory Virtual Instrumentation Suit. Its a Hybrid multi functional circuit design board which have both hardware and software functionalities. Besides Analog I/O port, Digital I/O port and +5V power supply it has 20 MHz oscilloscope, 1 MHz function Generator with Sine, Saw tooth and Square wave form, + 12V Variable Power supply source, + 15V fixed power supply source, Digital Multimeter with capacitance and Inductance measurement facilities and high quality breadboard for circuit design purpose.

The physical diagram of ELVIS II+ is shown above. The physically accessible ports have been indicated. The software used to access all the instruments of ELVIS is called "NI ELVISmx Instrument Launcher". It contains all the software instruments like DMM, SCOPE, FUNCTION GENERATOR, VPS, BODE SCOPE etc.  

Procedure:

1. Search for NI ELVISmx Instrument Launcher on the start menu, click on the DMM. Using DMM test all the passive components given inside the plastic box. Take the screen shot of your measurement.

2. Design a function generator that should have waveform, amplitude and frequency controller. Generate the waveform over any analog output port of the ELVIS. Connect the Oscilloscope CH0 on that AO port. Start the instrument launcher and adjust the V/D and T/D for proper wave form view.

3. Design a passive low pass and high pass filter one after another over the breadboard of ELVIS. Connect the breadboard function generator and ground to the circuit. Open the Bode Analyzer in the instrument launcher. Set the start and stop frequency and click on start. It will automatically start plotting the frequency response. Calculate the 3dB down cut-off frequency from the plot and compare it with the theoretical value.