1. Toshiba RF Receiver for HDTV
Presentation 4: 11/11/2004
Team:
Josue Caballero, Brett DiCio,
Daniel Hooper, Efosa Ojomo,
George Sewell

2. Work Accomplished in the Past Week
Broke down our project into problem areas
Defined the environment in which our project is operating
Inputs
Output
Developed more questions for our sponsor

3. Goal of the Project Design a cost efficient wireless system
Transmits factory generated signals to be received at specified signal strength (ex. 40/65/>85 μ dB)
UHF: Ultra High Frequency
VHF: Very High Frequency
CATV: Cable Television
ATSC: Advanced Telecommunications Standards Committee
QAM: Quadrature Amplitude Modulation
The operational frequency range should be between and MHz.

4. Problem Statement
Coaxial cable to be attached to the television’s tuner/RF switch
Cable can fall off, damaging assembly line or TV, incurring repair costs
Cable becomes damaged with use, needing replacement
Damaged cable can cause TV rejection, affecting productivity

5. Externals – Source UHF/VHF/CATV using ATSC/QAM Feed is on coax
The feed is controllable
Signal – Test pattern*
Strength – Adjustable throughout factory
*Question: Test signals on one or multiple frequencies
Full chart can be found at

6. Externals – Input Input goes into cable tuner dB spec is very specificTV
V-Chip (Violence - Chip)
Closed Captioning (CC)

7. Antenna - Transmitter
Goal - To change coax signal into radio frequency signal
Directionality
Less errant signals / strong gain
Bandwidth (55.25 – Mhz, individual/multiple)
Gain
“Antenna gain is defined as the power output, in a particular direction, compared to ...any direction by a perfect omnidirectional antenna.” (Stallings, 109)

8. Antenna - Reciever Goal – Changes RF signal to coax line signal
Directionality – adjacent signal interferance
Bandwidth reception
Single/Multiple
Deviation – what can we work with

9. Looking Forward Design philosophy Antenna design = “Black Magic”
Difficult to design and analyze mathematically
Graduate level EE courses
Solution: Iterative design process
Plan
Build
Test

10. Iterative Design Process
Eliminates uncertainties that arise in the ‘real world’
We will know when we are ‘getting close’ and when we are ‘there’
Recommended by Dr. Fleetwood

11. Next Week Work out final questions about specification
Repeatability
Bandwidth
Will a tuned antenna work?
Is it necessary to cover the entire BW? ( MHz) (5.4 – 0.37m)
Determine testing procedures

12. References http://www.bsjm.com.cn/04/images/mdsbxz.jpg
“Data and Computer Communications”, William Stallings, 2004 (C)Prentice Hall New Jersey pg. 109