North American broadcast television frequencies

From Wikipedia, the free encyclopedia

In North America, terrestrial television is broadcast on designated channels numbered 2 through 69. Except for a few instances, consumer televisions and recorders come with these frequencies pre-programmed in, as opposed to what sometimes occurs in other places around the world. Traditionally, the frequencies are divided into two sections, the very high frequency (VHF) band and the ultra high frequency (UHF) band, but in reality, the VHF band is further subdivided into two more sections, VHF-Lo (band I) and VHF-Hi (band III). In between lies the FM band (band II) used for frequency-modulated radio transmissions and a VHF radio band typically used by civil service agencies, amateur radio and aircraft (often called the airband).

On many FM radios, the audio for channel 6 can often be picked up by turning the tuner dial below the lower FM band edge, at 87.75. The volume is quite low as the deviation or modulation for TV audio is only ±25 kHz, versus ±75kHz for FM broadcasting.

Channels 70 through 83 were removed from the bandplan in the 1970s to make way for AMPS cellular telephone service; these channels were mainly used in the U.S., and mainly for translators, some of which continued in operation if their frequencies were not used by cellular. Channel 37 is allocated to radio astronomy and may not be used by any station.

Channels 14 through 19 are used for two-way radio in major cities on a non-interference basis, although the transition to digital television (DTV) has caused problems in certain instances when a previously unused channel has begun to be used for DTV broadcasts. The same holds true for wireless microphones and medical telemetry devices in that band.

In many regions, new digital TV channels are placed on channels 7-13, 15-19, 21-36 and 38-51, although others are used in some of the more crowded television markets. With virtual channel numbering, many digital televisions group digital channels with their corresponding analog broadcasts. For example, the first digital TV stream of a station that broadcasts analog TV on channel 4 will usually appear as 4-1 or 4.1 on a DTV receiver, even though the digital transmissions may be on channel 38. Several digital subchannels can be multiplexed together, so 4-1 through 4-5 might be used by one station. Subchannel 0 (e.g., 4-0) designates the analog broadcast.


The VHF bandplan was modified several times before 1948. The last change was the transfer of channel 1, originally intended as a low-power (less than 1,000 watts) LPTV community channel, to the six-meter amateur radio band. Amateur television (ATV) is used on four channels in the 420-450 MHz (70-centimeter) amateur band; UHF TV channel 14 starts at 470 MHz. These ATV channels are popular for repeater output and direct communications. ATV is also used on the other amateur bands above 450 MHz.

The FM audio carrier is always 4.5 MHz above the VSB video carrier, and the total channel bandwidth is 6MHz. The video carrier is nominally 1.25 MHz above the lower channel edge. In some cases, analog TV stations are assigned carrier frequency "offsets" of +10 or -10 KHz to minimize interference with distant stations on the same channel. (See NTSC for more details.) Analog stations must be separated by at least one unused channel except for non-adjacent channel pairs 4 and 5, 6 and 7, and 13 and 14. Digital TV is much more resistant to interference than NTSC, so it can operate adjacent to any station. This permits much greater utilization of the TV broadcast spectrum, allowing the reallocation of many TV channels to other services.

VHF low-band (band I)
Channel Lower edge Video carrier (MHz) ATSC carrier Audio carrier Upper edge
1* 44 45.25 n/a 49.75 50
2 54 55.25 55.31 59.75 60
3 60 61.25 61.31 65.75 66
4 66 67.25 67.31 71.75 72
5 76 77.25 77.31 81.75 82
6 82 83.25 83.31 87.75 88

Note that FM channel 200, 87.9MHz, overlaps TV 6. This is used only by KSFH and K200AA.
TV 6 analog audio can be heard on 87.7 or 87.8, but at low volume.


VHF high-band (band III)
Channel Lower edge Video carrier (MHz) ATSC carrier Audio carrier Upper edge
7 174 175.25 175.31 179.75 180
8 180 181.25 181.31 185.75 186
9 186 187.25 187.31 191.75 192
10 192 193.25 193.31 197.75 198
11 198 199.25 199.31 203.75 204
12 204 205.25 205.31 209.75 210
13 210 211.25 211.31 215.75 216

UHF TV Band
Channel Video carrier (MHz)
14 471.25
15 477.25
16 483.25
17 489.25
18 495.25
19 501.25
20 507.25
21 513.25
22 519.25
23 525.25
24 531.25
25 537.25
26 543.25
27 549.25
28 555.25
29 561.25
30 567.25
31 573.25
32 579.25
33 585.25
34 591.25
35 597.25
36 603.25
37* 609.25
NOT USED FOR ANY Type of Broadcasting
(Reserved/silenced for Radio Astronomy)
38 615.25
39 621.25
40 627.25
41 633.25
42 639.25
43 645.25
44 651.25
45 657.25
46 663.25
47 669.25
48 675.25
49 681.25
50 687.25
51 693.25
52 699.25
53 705.25
54 711.25
55 717.25
56 723.25
57 729.25
58 735.25
59 741.25
60 747.25
61 753.25
62 759.25
63 765.25
64 771.25
65 777.25
66 783.25
67 789.25
68 795.25
69 801.25
70* 807.25
71* 813.25
72* 819.25
73* 825.25
74* 831.25
75* 837.25
76* 843.25
77* 849.25
78* 855.25
79* 861.25
80* 867.25
81* 873.25
82* 879.25
83* 885.25

* Channel(s) no longer allocated to broadcast television

Advanced Search
Included Web Search Engines


Safe Search

close

Top Matching Results

Occasionally Search.com will highlight specialized results that are based on the context of your query. Examples of specialized results include specific links to news, images, or video.

Top Matching Results may highlight information from other Search.com pages, content from the CNET Network of sites, or third party content. The listings are based purely on relevance. Search.com does not receive payment for listings in this section but our partners that provide this data may get paid for listing these products.

Sponsored Links

This section contains paid listings which have been purchased by companies that want to have their sites appear for specific search terms and related content. These listings are administered, sorted and maintained by a third party and are not endorsed by Search.com.

Search Results

Search.com sends your search query to several search engines at one time and integrates the results into one list which has been sorted by relevance using Search.com's proprietary algorithm. You can customize the list of search engines included in your metasearch from the preferences.

The search engines that are used in your metasearch may allow companies to pay to have their Web sites included within the results. To view the Paid Inclusion policy for a specific search engine, please visit their Web site. Search.com does not accept payment or share revenue with any search engine partner for listings in this section.