ATSC Broadcast

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ATSC Broadcast
ATSCthmb.jpg
Frequencies 54 MHzMegaHertz (MHz) 10^6 Hz54,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
54,000 kHzKiloHertz (kHz) 10^3 Hz
,700 MHzMegaHertz (MHz) 10^6 Hz700,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
700,000 kHzKiloHertz (kHz) 10^3 Hz
54,000 kHzKiloHertz (kHz) 10^3 Hz
54 MHzMegaHertz (MHz) 10^6 Hz
700,000 kHzKiloHertz (kHz) 10^3 Hz
700 MHzMegaHertz (MHz) 10^6 Hz
Frequency Range 54 MHzMegaHertz (MHz) 10^6 Hz54,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
54,000 kHzKiloHertz (kHz) 10^3 Hz
- 700 MHzMegaHertz (MHz) 10^6 Hz700,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
700,000 kHzKiloHertz (kHz) 10^3 Hz
Mode RAW
Modulation 8VSB
ACFAutoCorrelation Function
Bandwidth 6 MHzMegaHertz (MHz) 10^6 Hz6,000,000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).
6,000 kHzKiloHertz (kHz) 10^3 Hz
6,000 kHzKiloHertz (kHz) 10^3 Hz
MHzMegaHertz (MHz) 10^6 Hz
6,000 kHzKiloHertz (kHz) 10^3 Hz
MHzMegaHertz (MHz) 10^6 Hz
Location North America
Short Description Advanced Television Systems Committee Television. 8VSB Modulation
I/Q Raw Recording
Audio Sample

Description[edit]

Advanced Television Systems Committee Television. 8VSB Modulation. 8VSB Modulation is a special kind of PAMPulse Amplitude Modulation Modulation.

Each channel has a single carrier signal on the left of the signal.

8VSB[edit]

Vestigal Side Band[edit]

VSB.jpg

8-Amplitude Keying[edit]

8VSB employs a special keying that is unique. It uses a form of amplitude modulation, where 8 distinct amplitude levels are chosed to represent digital bits. Phase is not used to represent data. Since phase is not marking data, the IQ graph for the signal consists of 8 vertical lines alone the I axis (real), so that only the I value is counted when determining the bit; the Q value is not controlled, and can move freely as the propagation naturally causes it.

In contrast, QAMQuadrature Amplitude Modulation uses both I and Q to determine the bit. 8VSB is not to be confused with QAMQuadrature Amplitude Modulation.

Ss (2015-08-05 at 12.47.51).png

Frequencies[edit]

Table is taken from Wikipedia ATSC article.

NOTE: ATSC pilot signal approximately 310 KHzKiloHertz (kHz) 10^3 Hz above lower edge.
VHFVery High Frequency (30-300 MHz) low-band
(frequencies in MHzMegaHertz (MHz) 10^6 Hz)
 Channel   Lower edge   Video carrier   ATSC pilot   Audio carrier   Upper edge 
2 54 55.25 54.31 59.75 60
3 60 61.25 60.31 65.75 66
4 66 67.25 66.31 71.75 72
(Break in band plan)
5 76 77.25 76.31 81.75 82
6 82 83.25 82.31 87.75 88

VHFVery High Frequency (30-300 MHz) high-band

(frequencies in MHzMegaHertz (MHz) 10^6 Hz)

 Channel   Lower edge    Video carrier   ATSC pilot   Audio carrier   Upper edge 
7 174 175.25 174.31 179.75 180
8 180 181.25 180.31 185.75 186
9 186 187.25 186.31 191.75 192
10 192 193.25 192.31 197.75 198
11 198 199.25 198.31 203.75 204
12 204 205.25 204.31 209.75 210
13 210 211.25 210.31 215.75 216

UHFUltra High Frequency (300-3000 MHz) band

(frequencies in MHzMegaHertz (MHz) 10^6 Hz) ATSC signal 310 KHzKiloHertz (kHz) 10^3 Hz above lower edge

 Channel   Lower edge   Video carrier   ATSC pilot   Audio carrier   Upper edge 
14 470 471.25 470.31 475.75 476
15 476 477.25 476.31 481.75 482
16 482 483.25 482.31 487.75 488
17 488 489.25 488.31 493.75 494
18 494 495.25 494.31 499.75 500
19 500 501.25 500.31 505.75 506
20 506 507.25 506.31 511.75 512
21 512 513.25 512.31 517.75 518
22 518 519.25 518.31 523.75 524
23 524 525.25 524.31 529.75 530
24 530 531.25 530.31 535.75 536
25 536 537.25 536.31 541.75 542
26 542 543.25 542.31 547.75 548
27 548 549.25 548.31 553.75 554
28 554 555.25 554.31 559.75 560
29 560 561.25 560.31 565.75 566
30 566 567.25 566.31 571.75 572
31 572 573.25 572.31 577.75 578
32 578 579.25 578.31 583.75 584
33 584 585.25 584.31 589.75 590
34 590 591.25 590.31 595.75 596
35 596 597.25 596.31 601.75 602
36 602 603.25 602.31 607.75 608
37 608 609.25 608.31 613.75 614
38 614 615.25 614.31 619.75 620
39 620 621.25 620.31 625.75 626
40 626 627.25 626.31 631.75 632
41 632 633.25 632.31 637.75 638
42 638 639.25 638.31 643.75 644
43 644 645.25 644.31 649.75 650
44 650 651.25 650.31 655.75 656
45 656 657.25 656.31 661.75 662
46 662 663.25 662.31 667.75 668
47 668 669.25 668.31 673.75 674
48 674 675.25 674.31 679.75 680
49 680 681.25 680.31 685.75 686
50 686 687.25 686.31 691.75 692
51 692 693.25 692.31 697.75 698

Channel 37 and 51 are held from broadcasting due to interference/band allocation problems with other RFRadio Frequency applications.

Decoding Tutorials[edit]

Video Examples[edit]

Additional Links[edit]

Additional Images[edit]