Antenna BoosterAntenna Booster

What is antenna booster?What is antenna booster?

A device used to amplify the signal A device used to amplify the signal received (by ratio) by the antenna before received (by ratio) by the antenna before feeding to the television receiver.feeding to the television receiver.

A signal protection box that regulates A signal protection box that regulates television frequency signal.television frequency signal.

Booster Block DiagramBooster Block Diagram

Signal Detector

LoDetector

Receiver Input

DuplexerDirectional

coupler

Antenna input Re-transmit

Detecting ReceiversDetecting Receivers

• Allow secondary users in licensed bands if they can guarantee that they Allow secondary users in licensed bands if they can guarantee that they do not interfere with primary do not interfere with primary receiversreceivers..

Ch.5

Ch.7

Ch.6

Ch.4

Ch.3

Ch.5

Ch.9

Ch. 3,4,5,6,7

shadower

Detecting “Passive” ReceiversDetecting “Passive” Receivers

• Legacy receivers must be able to function interference free.Legacy receivers must be able to function interference free.• All RF receivers leak local oscillator out of antenna.All RF receivers leak local oscillator out of antenna.• Solution: Low cost sensors to detect leakage.Solution: Low cost sensors to detect leakage.

Reverse LO leakage

TV Detector VansTV Detector Vans

• Used since 1920s

CognisensorCognisensor

• Optimal to connect sensor directly between receiver and antenna.Optimal to connect sensor directly between receiver and antenna.• Increases LO power coupled to sensor, reduces interference.Increases LO power coupled to sensor, reduces interference.• Allows sensor to reuse receive antenna for transmission.Allows sensor to reuse receive antenna for transmission.

cognisensor

Cognisensor, close up

Antenna input

Receiver Input

DirectionalCoupler

LODetector

Transmitter

Duplexer

CR

TV Booster Sample diagram

ANATOMY OF AN ANALOG TV SIGNALexample; channel 19

Lower Edge – 500.000 MHz

Upper Edge – 506.000 MHz

Video Carrier center freq –

501.250 MHz

Color Carrier center freq –

504.830 MHz

Audio Carrier center freq –

505.750 MHz

0 amplitude

ANATOMY OF A DIGITAL TV SIGNALexample; channel 19

Lower Edge – 500.000 MHz

Upper Edge – 506.000 MHz

Video, Color and Audio Carrier Signals Are Scattered Throughout the

Bandwidth at FULL Amplitude

0 amplitude

14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69

470-

476

476-

482

482-

488

488-

494

494-

500

500-

506

506-

512

512-

518

518-

524

524-

530

530-

536

536-

542

542-

548

548-

554

554-

560

560-

566

566-

572

572-

578

578-

584

584-

590

590-

596

596-

602

602-

608

608-

614

614-

620

620-

626

626-

632

632-

638

638-

644

644-

650

650-

656

656-

662

662-

668

668-

674

674-

680

680-

686

686-

692

692-

698

698-

704

704-

710

710-

716

716-

722

722-

728

728-

734

734-

740

740-

746

746-

752

752-

758

758-

764

764-

770

770-

776

776-

782

782-

788

788-

794

794-

800

800-

806

KCSI

E

X

P

E

R

I

M

E

N

T

A

L

KWHY

S

L

A

T

E

D

-

D

T

S

L

A

T

E

D

-

D

T

KVCR-DT

KCET

KPXN

KTLA-DT

KDOC-DT

KSMV-LP

KMEX

KMEX-DT

KNBC-DT R

adio

Ast

rono

my K

NET-LP

KVEA-DT

KTBN

KLCS-DT

KWHY-DT

KCAL-DT

KXLA

KFTR

KFTR-DT

KOCE-DT

S

L

A

T

E

D

-

D

T

KOCE

KXLA-DT

KVEA

KABC-DT

KAZA-DT

KDOC

KJLA

KLCS

KCET-DT

KCBS-DT

KSCI-DT

KRCA

KTTV-DT

KCOP-DT

KRCA-DT

Equal Frequency allocation of UHF TV

in the UHF SPECTRUM

TV Booster Common ProblemsTV Booster Common Problems

No powerNo power Intermittent signalIntermittent signalLight bars rolling up or downLight bars rolling up or downFoggy picturesFoggy picturesWeak signalWeak signalPictures color on and offPictures color on and offSagging picturesSagging pictures