Does anyone know where I can get a chart detailing U.S. TV Frequncies

[BirdDad]

Are they the same frequencies as the old analog channels(which I think is very improbable) which I am having no trouble at all finding charts and maximum and lowest frequencies clearly stated(which is what I want to find for the digital channels.
Also how can I figure out
Also what is up with those channels within channels(I mean like channel 21 here has a 21a b,c,d)? They can't all be on the same frequency can they, either way I want to know about it.
All that Google searches have turned up is analog channels.
Thank you.

 

[PottedMeat]

i believe they are the same.

http://electronics.howstuffworks.com/dtv3.htm

Each broadcaster has one digital TV channel, but one channel can carry multiple sub-channels if the broadcaster chooses that option. Here's how it works:

On its digital channel, each broadcaster sends a 19.39-megabit-per-second (Mbps) stream of digital data. Broadcasters have the ability to use this stream in several different ways. For example:

A broadcaster can send a single program at 19.39 Mbps.
A broadcaster can divide the channel into several different streams (perhaps four streams of 4.85 Mbps each). These streams are called sub-channels, and this type of broadcasting is called multicasting. For example, if the digital TV channel is channel 53, then 53.1, 53.2 and 53.3 could be three sub-channels on that channel. Each sub-channel can carry a different program.

The reason that broadcasters can create sub-channels is because digital TV standards allow several different formats.

they broadcast one stream on one center freq, in which there may be multiple channels decoded by the tuner

 

[BirdDad]

so we know for sure that the subs they are on the same channel?
I will be building an amp from scratch to amplify my bros deep fringe TV. I plan on drawing this out and testing segments of the amp as they are made.
I will only be amplifying certain channels while blocking all others.
I just want to get my frequencies right. Like 21 in old analog would be 21(a+b+c+d) on digital? I just want to know before I start pouring tons of hard work into this.
Thanks

 

[Paperdoc]

Some sources:

North American system - Over the Air and Cable systems. I think current digital systems use the same frequencies as older analog did, except that the range from channel 52 and up is no longer used for TV on OTA broadcasting. There is also an automatic re-assignment system in place to assist with the conversion from analog to digital. For example, the local station that used to be on analog Channel 2 can STILL be found on a digital TV as "Channel 2", but in fact it is re-directed to its real frequency in the old UHF band as channel 39 (or some such). As far as I know, this channel number change is NOT a universal conversion - that is, analog Channel 2 is not necessarily converted to digital channel 39 in all places, but the local system contains the information to tell the digital receiver what to do.

https://en.wikipedia.org/wiki/North_American_television_frequencies


Worldwide analog channels assignments - may not be of much help to you.

https://en.wikipedia.org/wiki/Television_channel_frequencies


General info on DTV

https://en.wikipedia.org/wiki/Digital_television


Digital Sub-channel info

https://en.wikipedia.org/wiki/Digital_subchannel

 

[who?]

www.tvfool.com

 

[lamedude]

A lot of channels moved during the transition, but kept their old analog channel number name so use the above website to see if channel 21 is still on channel 21.

 

[John Connor]

It's just like a P25 trunked radio system except in HDTV there is one assign frequency and multiple channels in the digital stream. In a P25 system you have a control channel ans several system channels that are shared by the users.