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Text File | 1994-11-27 | 16.0 KB | 358 lines

Newsgroups: sci.electronics From: andy@cbrown.claremont.edu Subject: Re: CATV channel frequencies USA (long) Lines: 345 Organization: Harvey Mudd College Date: 28 Jul 92 01:40:48 PDT In article <sysrick.711776020@starbase.spd.louisville.edu>, sysrick@starbase.sp d.louisville.edu (Rick McTeague) writes: > I'd like to know the frequencies used by each of the TV channels on > cable television. Yes, I know about 2-13 being the same as broadcast > TV... what about the rest, though? > > Rick Here is a list of TV frequencies. In the US, a TV channel is a 6 MHz wide chunk of bandspace. The bottom edge of the over-the-air channel 2 is 54 MHz and the upper edge is 60 MHz. Within this 6 MHz space is a video carrier, a color carrier, and an audio carrier. The frequency of the video carrier is 1.25 MHz above the lower edge, so for channel 2 the video is at 55.25 MHz. The color carrier is approx. 3.58 MHz above the _video_ carrier (N.B. not the lower edge), so for ch 2 it is 58.83 MHz. The audio carrier is 4.5 MHz above the _video_ carrier, so for ch 2 it is 59.75 MHz. The reason I mention all of this is that you have to be careful to note how a channel frequency is being specified. The two common methods are (1) specifying the lower edge (e.g. 54 MHz, but often as a range of lower edge to upper edge like 54-60 MHz) and (2) specifying the frequency of the video carrier (e.g. 55.25 MHz). In the following lists I always use the latter method, specifying the video carrier. CATV has channels with frequencies below channel 2. They are designated T-7 (tee seven or tee dash seven) through T-14 and are usually used for transmission in the reverse direction. If your local city council meeting is broadcast live, the camera is being modulated onto one of those T channels and sent back up to the cable system headend whereupon it is broadcast outbound on the community cable access channel. In the list I have some channels with the designation A-1 (A minus one, not A dash one) through A-8. They are so designated because their frequencies immediately precede that of the CATV channel known as A. In the CATV listing, the column labeled Common gives the common industry parlance for that channel. The next column labeled EIA gives the new EIA standardized designation. Column STD shows the standard CATV frequency which usually matches IRC. IRC stands for Incrementally Related Carrier and means that the _lower_edge_ of the channel space is on the nice, round-numbered boundary such as 54 MHz, 60 MHz, 66 MHz etc. HRC stands for Harmonically Related Carrier, and as you can see means that it is the _video_carrier_ that is assigned the nice round number (6 MHz harmonics, hence). Some cable systems use IRC, some use HRC. The number of channels on a given cable system varies. Very old systems might only go up to 300 or 350 MHz. Most common in the past ten years or so is 450 MHz. Newer systems may be 550 MHz. The latest and greatest with any meaningful installed base is 800 or 860 MHz (somebody correct me), but it is rare and pricey. The list herein only goes up to 550 MHz. FM radio frequencies are thrown in for good measure. This stuff was gathered from several sources. My thanks to all of them. Error reports are welcome. AIR 2 55.25 VHF-LO AIR 3 61.25 VHF-LO AIR 4 67.25 VHF-LO AIR 5 77.25 VHF-LO AIR 6 83.25 VHF-LO AIR 7 175.25 VHF-HI AIR 8 181.25 VHF-HI AIR 9 187.25 VHF-HI AIR 10 193.25 VHF-HI AIR 11 199.25 VHF-HI AIR 12 205.25 VHF-HI AIR 13 211.25 VHF-HI AIR 14 471.25 UHF AIR 15 477.25 UHF AIR 16 483.25 UHF AIR 17 489.25 UHF AIR 18 495.25 UHF AIR 19 501.25 UHF AIR 20 507.25 UHF AIR 21 513.25 UHF AIR 22 519.25 UHF AIR 23 525.25 UHF AIR 24 531.25 UHF AIR 25 537.25 UHF AIR 26 543.25 UHF AIR 27 549.25 UHF AIR 28 555.25 UHF AIR 29 561.25 UHF AIR 30 567.25 UHF AIR 31 573.25 UHF AIR 32 579.25 UHF AIR 33 585.25 UHF AIR 34 591.25 UHF AIR 35 597.25 UHF AIR 36 603.25 UHF AIR 37 609.25 UHF AIR 38 615.25 UHF AIR 39 621.25 UHF AIR 40 627.25 UHF AIR 41 633.25 UHF AIR 42 639.25 UHF AIR 43 645.25 UHF AIR 44 651.25 UHF AIR 45 657.25 UHF AIR 46 663.25 UHF AIR 47 669.25 UHF AIR 48 675.25 UHF AIR 49 681.25 UHF AIR 50 687.25 UHF AIR 51 693.25 UHF AIR 52 699.25 UHF AIR 53 705.25 UHF AIR 54 711.25 UHF AIR 55 717.25 UHF AIR 56 723.25 UHF AIR 57 729.25 UHF AIR 58 735.25 UHF AIR 59 741.25 UHF AIR 60 747.25 UHF AIR 61 753.25 UHF AIR 62 759.25 UHF AIR 63 765.25 UHF AIR 64 771.25 UHF AIR 65 777.25 UHF AIR 66 783.25 UHF AIR 67 789.25 UHF AIR 68 795.25 UHF AIR 69 801.25 UHF AIR 70 807.25 UHF (no longer assigned to TV) AIR 71 813.25 UHF (no longer assigned to TV) AIR 72 819.25 UHF (no longer assigned to TV) AIR 73 825.25 UHF (no longer assigned to TV) AIR 74 831.25 UHF (no longer assigned to TV) AIR 75 837.25 UHF (no longer assigned to TV) AIR 76 843.25 UHF (no longer assigned to TV) AIR 77 849.25 UHF (no longer assigned to TV) AIR 78 855.25 UHF (no longer assigned to TV) AIR 79 861.25 UHF (no longer assigned to TV) AIR 80 867.25 UHF (no longer assigned to TV) AIR 81 873.25 UHF (no longer assigned to TV) AIR 82 879.25 UHF (no longer assigned to TV) AIR 83 885.25 UHF (no longer assigned to TV) Common EIA STD IRC HRC Band ------------------------------------------------------------------------------- - CATV T-7 7.00 SUB CATV T-8 13.00 SUB CATV T-9 19.00 SUB CATV T-10 25.00 SUB CATV T-11 31.00 SUB CATV T-12 37.00 SUB CATV T-13 43.00 SUB CATV T-14 49.00 SUB CATV 2-1 49.25 48.00 LO CATV 2 02 55.25 55.25 54.00 LO CATV 3 03 61.25 61.25 60.00 LO CATV 4 04 67.25 67.25 66.00 LO CATV A-8 4+ 01 73.25 72.00 LO CATV A-7 5 05 79.25 78.00 LO CATV A-6 6 06 85.25 84.00 LO CATV A-5 95 91.25 90.00 91.25 MID CATV A-4 96 97.25 96.00 97.25 MID CATV A-3 97 103.25 102.00 103.25 MID CATV A-2 98 109.25 108.00 109.25 MID CATV A-1 99 115.25 114.00 115.25 MID CATV 7 07 175.25 175.25 174.00 HI CATV 8 08 181.25 181.25 180.00 HI CATV 9 09 187.25 187.25 186.00 HI CATV 10 10 193.25 193.25 192.00 HI CATV 11 11 199.25 199.25 198.00 HI CATV 12 12 205.25 205.25 204.00 HI CATV 13 13 211.25 211.25 210.00 HI CATV A 14 121.25 121.25 120.00 MID CATV B 15 127.25 127.25 126.00 MID CATV C 16 133.25 133.25 132.00 MID CATV D 17 139.25 139.25 138.00 MID CATV E 18 145.25 145.25 144.00 MID CATV F 19 151.25 151.25 150.00 MID CATV G 20 157.25 157.25 156.00 MID CATV H 21 163.25 163.25 162.00 MID CATV I 22 169.25 169.25 168.00 MID CATV J 23 217.25 217.25 216.00 SUPER CATV K 24 223.25 223.25 222.00 SUPER CATV L 25 229.25 229.25 228.00 SUPER CATV M 26 235.25 235.25 234.00 SUPER CATV N 27 241.25 241.25 240.00 SUPER CATV O 28 247.25 247.25 246.00 SUPER CATV P 29 253.25 253.25 252.00 SUPER CATV Q 30 259.25 259.25 258.00 SUPER CATV R 31 265.25 265.25 264.00 SUPER CATV S 32 271.25 271.25 270.00 SUPER CATV T 33 277.25 277.25 276.00 SUPER CATV U 34 283.25 283.25 282.00 SUPER CATV V 35 289.25 289.25 288.00 SUPER CATV W 36 295.25 295.25 294.00 SUPER CATV AA 37 301.25 301.25 300.00 HYPER CATV BB 38 307.25 307.25 306.00 HYPER CATV CC 39 313.25 313.25 312.00 HYPER CATV DD 40 319.25 319.25 318.00 HYPER CATV EE 41 325.25 325.25 324.00 HYPER CATV FF 42 331.25 331.25 330.00 HYPER CATV GG 43 337.25 337.25 336.00 HYPER CATV HH 44 343.25 343.25 342.00 HYPER CATV II 45 349.25 349.25 348.00 HYPER CATV JJ 46 355.25 355.25 354.00 HYPER CATV KK 47 361.25 361.25 360.00 HYPER CATV LL 48 367.25 367.25 366.00 HYPER CATV MM 49 373.25 373.25 372.00 HYPER CATV NN 50 379.25 379.25 378.00 HYPER CATV OO 51 385.25 385.25 384.00 HYPER CATV PP 52 391.25 391.25 390.00 HYPER CATV QQ 53 397.25 397.25 396.00 HYPER CATV RR 54 403.25 403.25 402.00 HYPER CATV SS 55 409.25 409.25 408.00 HYPER CATV TT 56 415.25 415.25 414.00 HYPER CATV UU 57 421.25 421.25 420.00 HYPER CATV VV 58 427.25 427.25 426.00 HYPER CATV WW 59 433.25 433.25 432.00 HYPER CATV XX 60 439.25 439.25 438.00 HYPER CATV YY 61 445.25 445.25 444.00 HYPER CATV ZZ 62 451.25 451.25 450.00 HYPER CATV AAA 63 457.25 457.25 456.00 HYPER CATV BBB 64 463.25 463.25 462.00 HYPER CATV CCC 65 469.25 469.25 468.00 HYPER CATV DDD 66 475.25 475.25 474.00 HYPER CATV EEE 67 481.25 481.25 480.00 HYPER CATV FFF 68 487.25 487.25 486.00 HYPER CATV GGG 69 493.25 493.25 492.00 HYPER CATV HHH 70 499.25 499.25 498.00 HYPER CATV III 71 505.25 505.25 504.00 HYPER CATV JJJ 72 511.25 511.25 510.00 HYPER CATV KKK 73 517.25 517.25 516.00 HYPER CATV LLL 74 523.25 523.25 522.00 HYPER CATV MMM 75 529.25 529.25 528.00 HYPER CATV NNN 76 535.25 535.25 534.00 HYPER CATV OOO 77 541.25 541.25 540.00 HYPER CATV PPP 78 547.25 547.25 546.00 HYPER FM 1 88.10 FM FM 2 88.30 FM FM 3 88.50 FM FM 4 88.70 FM FM 5 88.90 FM FM 6 89.10 FM FM 7 89.30 FM FM 8 89.50 FM FM 9 89.70 FM FM 10 89.90 FM FM 11 90.10 FM FM 12 90.30 FM FM 13 90.50 FM FM 14 90.70 FM FM 15 90.90 FM FM 16 91.10 FM FM 17 91.30 FM FM 18 91.50 FM FM 19 91.70 FM FM 20 91.90 FM FM 21 92.10 FM FM 22 92.30 FM FM 23 92.50 FM FM 24 92.70 FM FM 25 92.90 FM FM 26 93.10 FM FM 27 93.30 FM FM 28 93.50 FM FM 29 93.70 FM FM 30 93.90 FM FM 31 94.10 FM FM 32 94.30 FM FM 33 94.50 FM FM 34 94.70 FM FM 35 94.90 FM FM 36 95.10 FM FM 37 95.30 FM FM 38 95.50 FM FM 39 95.70 FM FM 40 95.90 FM FM 41 96.10 FM FM 42 96.30 FM FM 43 96.50 FM FM 44 96.70 FM FM 45 96.90 FM FM 46 97.10 FM FM 47 97.30 FM FM 48 97.50 FM FM 49 97.70 FM FM 50 97.90 FM FM 51 98.10 FM FM 52 98.30 FM FM 53 98.50 FM FM 54 98.70 FM FM 55 98.90 FM FM 56 99.10 FM FM 57 99.30 FM FM 58 99.50 FM FM 59 99.70 FM FM 60 99.90 FM FM 61 100.10 FM FM 62 100.30 FM FM 63 100.50 FM FM 64 100.70 FM FM 65 100.90 FM FM 66 101.10 FM FM 67 101.30 FM FM 68 101.50 FM FM 69 101.70 FM FM 70 101.90 FM FM 71 102.10 FM FM 72 102.30 FM FM 73 102.50 FM FM 74 102.70 FM FM 75 102.90 FM FM 76 103.10 FM FM 77 103.30 FM FM 78 103.50 FM FM 79 103.70 FM FM 80 103.90 FM FM 81 104.10 FM FM 82 104.30 FM FM 83 104.50 FM FM 84 104.70 FM FM 85 104.90 FM FM 86 105.10 FM FM 87 105.30 FM FM 88 105.50 FM FM 89 105.70 FM FM 90 105.90 FM FM 91 106.10 FM FM 92 106.30 FM FM 93 106.50 FM FM 94 106.70 FM FM 95 106.90 FM FM 96 107.10 FM FM 97 107.30 FM FM 98 107.50 FM FM 98 107.70 FM FM 100 107.90 FM Andy Davenport Harvey Mudd College Andy@HMCVAX.Claremont.Edu