User Account

All Pages

What can you say about the pam signal

Assignment Help Electrical Engineering
Reference no: EM131160236

Objectives
1. To examine the operation of the PAM modulator with natural and flat sampling
2. To examine the operation of the sample and sample & hold circuits
3. To examine the waveforms of the signals and the relation between the sampling pulses and the PAM signals

Instruments
• MCM30/EV Module
• Oscilloscope

Theory
A PAM signal is a sampled signal consisting in set pulses which amplitude is proportional to the amplitude of the analog signal.

The sampling can be natural or flat one. For natural sampling, the sampled signal follows the shape of the analog signal while flat sampling, the amplitude of the sampled signal pulses reproduces the amplitude taken by the analog signal in the sampling instant.

610_Signals.jpg

Procedure

Natural sampling
The block diagram of the PAM modulator with natural sampling is as shown below

1778_Block Diagram of PAM modulator.jpg


• Power the module

• Set the circuit to PAM-1 channel mode and set SW 1= Nat, SW2=1CH, SW3=2

• Connect 1 kHz-2Vpp to the analog input of the PAM modulator (connect TP24 to TP1 and adjust the 2Vpp signal level)

• Connect the oscilloscope to the analog input signal (TP 1) and to the output of the PAM modulator (TP1 1)

Exercise
i. What can you say about the PAM signal?

ii. Where are the sampling pulses measured for the PAM-1 modulator? How much is the pulse frequency, the period and duration?

iii. Change the sampling pulse width (set SW3 = 1) and note the corresponding PAM signal Variation.

Flat sampling
The block diagram of the PAM modulator with flat sampling is as shown below

640_Flat Sampling- Block diagram of PAM modulator.jpg

• Set the circuit to PAM-1 channel mode and set SW1=flat, SW2=1CH, SW3=2

• Connect 1kHZ-2Vpp to the input IN1 of the PAM modulator (connect TP24 to TP1 and adjust the 2Vpp signal level)

• Examine the waveforms of the analog input signal (TP1), of the signal at the Sample and Hold output (TP7), of the sampling pulses for the S&H (TP5)

• Note that the signal is sampled at the beginning of the sampling pulse, and the amplitude is kept constant up to the next pulse. Across TP 7, there is step signal which approximates the analog input signal.

• Examine the waveforms of the sampling pulses for the modulator (TP6) and the output PAM signal (TP 11), and note that the step signal is sampled when the level is stable

• See that the PAM pulse have constant amplitude for all their duration

• Change the sampling pulses width (set SW3=1) and note the corresponding variation of the PAM signal

Exercise
i. The PAM signal is missing across TP11. Explain

ii. Sketch the waveform at TP5, TP6, TP7, TP 11

iii. Compare the level of distortion of the reconstructed signal with natural and flat sampling.

State where each sampling is suitable.

Reference no: EM131160236

Questions Cloud

Importance of good methodology : According to Kerzner, "The importance of good methodology cannot be understated." Examine the significance of this statement as it relates to integrative information technology solutions with in an organization.
Relationship between cultural and cross-cultural psychology : Analyze the relationship between cultural psychology and cross-cultural psychology. Discuss the methodology associated with cross-cultural psychology research.
Calculate the determinant of a matrix of any order : Write a C++ program implementing the concept of recursion to calculate the determinant of a matrix of any order.
Describe unemployment trends based on unemployment rates : Describe and explain performance trends of the economy. Research and explain Government's measures adopted to achieve the production output performance. Describe unemployment trends based on unemployment rates.
What can you say about the pam signal : What can you say about the PAM signal?  -  Where are the sampling pulses measured for the PAM-1 modulator?
Drawback of discretionary access control model : Explain the main drawback of discretionary access control model (DAC).
Produces specialty vehicles by contract : Automata Inc. produces specialty vehicles by contract. The company operates severaldepartments, each of which builds a particular vehicle, such as a limousine, a truck, a van, oran RV.
Describe iterative system development model : Describe iterative system development model. provide merits and demerits?
Identify the weaknesses of the organization structure : Conduct a SWOT analysis for one of your company's competitors. (Remember that strengths and weaknesses are internal factors. Opportunities and threats are external factors). Identify the (internal) strengths of the organization structure. Identify ..

Reviews

Write a Review

Electrical Engineering Questions & Answers

  Calculate the fault current in amperes

Calculate the fault current in amperes that flows when a balanced three-phase fault occurs at bus 1 (located between 'T1 and L1 Repeat these calculations for a fault 10 km down the line L1, For both fault locations, what is the proportion of the f..

  Design a receiver ee determine the block diagram that

design a receiver e.e. determine the block diagram that will detect the data on a qam waveform having an m 16-point

  Compute the velocity of the water jet

A hydroelectric power plant has a synchronous generator who's speed must be fixed at 180 r/min. The turbine is Pelton type with 10 m runner diameter. When the flow rate at the nozzle of the penstock is 10m^3/s, the generated electricity.

  Define dynamic ram that must be given a refresh cycle

Dynamic RAM that must be given a refresh cycle 64 times per ms. Each refresh operation requires 150 ns. memory cycle requires 250 ns.

  Find the rate of heat transfer to the air conditioner

The air conditioner in a house or a car has a cooler that brings atmospheric air from 30 degree c to 10 degree c both states at 101 kPa. if the flow rate is 0.5 kg/s find the rate of heat transfer.

  What is the purpose of the compensating gauge

what is the purpose of the compensating gauge?

  Calculate vphase primary and secondary-p-q and s

For a transformer with a line voltage of 34.5 KV on the primary and a line voltafe of 480V. Calculate Vphase primary and secondary,P,Q, and S for each of the following transformer connections and loads.

  Design a combinational circuit that compares two 4-bit num

Design a combinational circuit that compares two 4-bit numbers to check if they are equal. The circuit output is equal to 1 if thetwo numbers are equal and otherwise 0.

  The percentage of aliasing level at the cutoff frequency

The percentage of aliasing level at the cutoff frequency

  What is the time rate of change of voltage across capacitor

A constant current source of 2 mA is placed across a fully discharged capacitor of 100 F. In the time period before the capacitor reaches breakdown voltage, what is the time rate of change of voltage across the capacitor in V/s

  Expected attributes of engineers

Read The Engineer of 2020: Visions of Engineering in the New Century [1]. Identify the expected attributes of engineers in the year 2020 and, in a report, identify how those attributes can be developed and maintained through various lifelong learn..

  Determine the values for kn

Transistor characteristics iD versus Vds for an NMOS device is this an enhancement-mode or depletion-mode device and determine the values for Kn and VTN

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd