Robert Gibb

1

• Robert Gibb
• Dominic Emilian
• Seth Berggren
• Patrick Coletti

2
Motivation

• Current digital cable systems
• Long, clumsy coax cable laid out throughout walls
  of the house are unsightly and difficult to route
  around your house
• Broken coax can be difficult to replace
• Splitting of coax cable requires additional wires
• Awkward jack placement
• One receiver box per TV

3
Requirements Specification

• Cost Under 200
• Size Transmitter box should be 8x6x2 or smaller.
  Receiver will be small enough to plug right into
  back of TV.
• Easy Omni-directionally transition, simple
  setup, easy to use interface
• Multiplicity transmit separate channels to up to
  four different TVs.
• Security Password protected user accounts on
  server, parental control
• Legality YES, OUI, CI
• Ability work at distances up to 150 feet.

4
System Overview
To Router
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Transmitter Schematic

6
Transmitter Block Diagram
Baseband I/Q
1.
RF Cable
RF Antenna Out
2.
3.
4.
-2400TV03offset
2400TV03offset
-56MHz
56MHz
-112MHz
112MHz
2.
1.
3.
4..
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Transmitter Design Leveling Network

• MAX2831 Common Mode
• Voltage 1.2V
• ADRF6806 1.65V
• Voltage Divider via resistive network to achieve
  level matching between ICs

8
Trasmitter Design Power

• 250mA per IC x 8 ICs 2A
• 12V max for Vcc MAR-8A

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Transmitter Design Interfacing

• DATA, CLK, CS70 one chip select high per
  programming cycle

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Transmitter Design Amplifier

• Max2831 recommends 100mVrms 0dbm at input
• Input to ADRF -55dbm Need50-60dB of gain
• Minicircuits DC-1GHz, 25dB MAR-8A

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Receiver Design
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Challenges

• Common-Mode voltage differences
• Variable Voltage Settings
• Evaluation boards must be tested

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PCB

• PCB design must be completed
• PCBs need to be ordered and tested

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SPI Design Physical Implementation
On Transmitter
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SPI Design Programming
Register 7 Register 6 Register 5 Register 4 Register 3 Register 2 Register 1 Register 0
23 0 0 0 0 0 0 0 0
22 0 0 0 0 1 0 0 0
21 0 0 0 0 1 0 0 0
20 0 1 0 0 1 0 0 0
19 0 1 0 0 0 0 0 0
18 0 1 0 0 0 0 0 0
17 0 1 0 1 0 0 0 0
16 0 0 0 0 0 0 0 0
15 0 0 0 0 0 0 0 0
14 0 1 0 1 0 0 0 0
13 0 1 0 1 0 0 0 0
12 0 0 0 0 0 0 0 0
11 0 0 0 0 0 0 0 0
10 0 0 0 1 0 0 0 0
9 1 0 0 1 0 0 0 0
8 0 1 0 1 0 0 0 0
7 1 0 1 1 0 0 0 0
6 1 0 0 0 0 1 1 1
5 0 0 1 0 0 0 0 0
4 0 0 0 0 0 1 0 0
3 0 0 0 0 1 1 0 1
2 1 1 1 1 0 0 0 0
1 1 1 0 0 1 1 0 0
0 1 0 1 0 1 0 1 0

• RFICs controlled by programming registers
  -ADRF6806, MAX2831
• Each RFIC contains 8 registers
• Example of register values for ADRF6806
• Atmel provides SPI libraries

Designates Register
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Web Server Design

• Server hosted on EVK1100
• Web page written in HTML and JavaScript
• Accessed via computer or mobile device
• Interfaced with microcontroller using C code

Web Server
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Design Challenges

• Interfacing between the integrated circuits
• Powering the boards
• PCB design
• Interfacing between microcontroller and hardware

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Budget
QTY Description Individual Price Min QTY QTY Price Actual Price
1 ADRF6806EVALUATION 160.00 1
1 MAX2831EVK 1,000.00 1
1 ADL5386EVK 100 1
8 MAX2831 5.36 1 64.32
4 ADL5386 6.95 1 27.80
1 MAR-8A 1.32 1 1.32
1 avr32 evaluation board 160 1 160.00
4 layer PCB 66.00 5 330.00
Tunable VCO 40 1 40
1 10µF 10 capacitor (1206)Murata GRM31CR60J106K 0.59 1 0.59 0.94
2 1.5pF 0.25pF capacitors (0402)Murata GRM1555C1H1R5C 0.04 10 0.08 0.43
1 1000pF 10 capacitor (0402)Murata GRM155R71H102K 0.03 10 0.03 0.30
1 2200pF 10 capacitor (0402)Murata GRM155R71H222K 0.03 10 0.03 0.30
1 68pF 5 capacitor (0402)Murata GRM1555C1H680J 0.04 10 0.04 0.43
1 10µF 10 capacitor (0805)Murata GRM21BR60J106K 0.35 1 0.35 0.47
1 DB25 right-angle male connectorAMP 5747238-4 6.02 1 6.02 36.24
2 1 x 2 headersSullins PEC36SAA 1.43 1 2.86 4.09
8 75O 1 resistors (0402) 0.06 1 0.48 0.51
4 3.3kO 5 resistors (0402) 0.05 1 0.20 0.21
4 49.9O 1 resistors (0402) 0.06 1 0.24 0.25
8 0O 1 resistors (0402) 0.07 10 0.59 0.79
1 270O 5 resistor (0402 0.99 1 0.99 1.97
2 100O 1 resistors (0402) 0.06 1 0.12 0.13
1 1kO 1 resistor (0402) 0.06 1 0.06 0.06
1 1.2kO 5 resistor (0402) 0.05 1 0.05 0.05
1 750O 5 resistor (0402) 0.05 1 0.05 0.05
1 10kO 5 resistor (0402) 0.05 1 0.05 0.05
2 2.4GHz RF balunsMurata LDB212G4010C-001 0.64 1 1.28 1.28
2 Maxim MAX4447ESE 5.39 1 10.78 10.78
2 Maxim MAX4444ESE 5.12 1 10.24 10.24
1 Low-dropout referenceMaxim MAX6061BEUR 3.25 1 3.25 3.25
1 Maxim MAX2831ETM 5.37 1 5.37 5.37
2 SN74LVTH244ADBTexas InstrumentsSN74LVTH244ADBR 0.73 1 1.46 1.46
1 40MHz crystalKyocera CX3225SB40000H0WZK21 3.33 1 3.33 3.33
33 Test pointsKeystone 5000 0.36 10 11.88 14.40
8 SMA edge-mount connectors, roundJohnson 142-0701-801 5.10 1 40.80 40.80
6 Shunts (ANTSEL, LDO_IN,RXBBBUF, RXTX, TXBBBUF,VCCVCO)Sullins SSC02SYAN 0.42 1 2.52 2.52
103.74 764.14
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Gantt Chart
Task January February March April
Loop Filters
Finalize System Noise/Power
PCB Design
Mount PCBs
PCB Fab
SPI functionality
Multi User Web Server
Web Server control of SPI
Interface
Casing
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What's Next

• Final Design Production
• Transmitter PCB Fabricated
• Receiver PCB Fabricated
• Both PCBs mounted with components
• Final Product Testing
• Both transmitter and receivers need initial
  programming
• Testing will be done through reprogramming
• Looking to deliver the best possible picture
• Housing Produced

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Team Roles

• Robert Gibb Hardware Interfacing, Low Level
  Software Design
• Dominic Emilian Transmitter Design, PCB Design
• Patrick Coletti Web Server
• Seth Berggren Receiver Design

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Any Questions