Setting up the NI ELVIS/SIGEx Board
1. The PC was turned on.
2. The NI ELVIS was turned on and the Prototyping Board Switch was kept off. The USB light was observed.
3. The NI ELVIS Prototyping Board switch was then turned on. The three power LEDs were checked to see if they were on.
4. The “SIGEx Rx_x.exe” Main VI was launched.
5. The number of the NI ELVIS used was selected.
6. The NI ELVIS/SIGEx bundle was ready to be used.
7. The Lab 4 tab was selected on the SIGEx SFP
Simple Systems and Checking for Linearity
1. The FUNC OUT terminal of the FUNCTION GENERATOR was connected to the LIMITER input. Channel 0 was also connected to the input. Channel 1 was connected to the LIMITER output. The FREQUENCY of the FUNCTION GENERATOR was set to 1000…show more content… The FUNC OUT terminal of the FUNCTION GENERATOR was connected to the MULTIPLIER inputs which were connected in parallel. Channel 0 was connected to the input as well. Channel 1 was connected to the output of the MULTIPLIER. The FREQUENCY of the FUNCTION GENERATOR was set to 1000 Hertz, the AMPLITUDE was set 1 Vpp, and the waveform was set to SINE. The SCOPE’S timebase was set 4ms, the rising edge trigger was connected to channel 0, and the trigger level was set to 0V.
The Voltage Controlled Oscillator as a System
1. The circuit shown in Figure 2-4 was configured. The FREQUENCY of the FUNCTION GENERATOR was set to 2000 Hertz. The AMPLITUDE was set to 4 Vpp and the waveform was set to SINE. The MODULATION TYPE was set to FM. The SCOPE’S timebase was set to 4ms, the rising edge trigger was set to sinewave output, and the trigger level was set to 0V.
2. After the scope was checked to ensure that it was triggering on the sinusoidal signal, both the input DC voltage and the output sinusoid were displayed.
3. The effect of the varying DC input voltage was observed. The output frequency vs input DC voltage was recorded in Table 2-3.
4. The VCO was analyzed to determine whether it was a linear…show more content… The input and output voltages were measured using the oscilloscope. The peak-to-peak and RMS values of the input and output voltages were recorded. Next, the filter capacitor was removed to observe the output voltage waveform for full-wave rectification. In addition, the diode labeled as D2 was removed to observe the output voltage waveform for the half-wave rectification. Lastly, the peak value of the output voltage was measured and recorded to determine the forward voltage drop per diode.
5. The output and ripple voltages were measured by creating the circuit in Figure 4-7 by replacing the diode labeled as D2 and the filter capacitor. The peak and average values for the output voltage were measured and recorded along with peak-to-peak ripple voltage. The frequency of the output ripple voltage was recorded as well.
6. The load current was estimated by measuring and recording the capacitor’s charge time, discharge time, and slope of the discharge portion of the waveform. The oscilloscope was returned to DC coupling mode.
7. The capacitor charge and discharge currents were measured by observing the voltage waveform across RS, the 0.5Ω current sensing resistor. The scaling factor was calculated and recorded. The voltage waveform was saved.
8. The load current was measured by connecting the oscilloscope probe across ¬RL to display the waveform. The load waveform was
