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