robert123456789
Member
- Joined
- Sep 24, 2008
- Messages
- 5
what happens when tv go's digi and those freq's are free
When Tv Gose Digi
- Thread starter robert123456789
- Start date
- Status
rdale
Completely Banned for the Greater Good
When TV goes digital, those will be allocated to the public safety sector among others.
Robert123456789,
I'd recommend you search through the forums, this one mainly and the 'wasteland'. This question has been answered in detail.
Basically, the frequencies will not be 'free', just reallocated for other use.
I'd recommend you search through the forums, this one mainly and the 'wasteland'. This question has been answered in detail.
Basically, the frequencies will not be 'free', just reallocated for other use.
rdale
Completely Banned for the Greater Good
There's a little problem finding much though if he uses those search terms...
MaxMan1986
Member
- Joined
- Nov 11, 2005
- Messages
- 135
Maybe he "gose" away and takes his "freq's" with him.
fixed
n4yek
Member
His response implied he was making fun of the sentence which had goes spelled as "go's"
chrismol1
P25 TruCking!
- Joined
- Mar 15, 2008
- Messages
- 1,341
does than mean if I have an old analog TV tuner, I can hook up an antenna and listen to some public safety stuff if a place nearby has a license on those frequencies?
gose? maybe he meant goose??
N
N_Jay
Guest
So we have a post from someone new to this website and you make fun of his writing. Way to go, he could stop participating in these forums and maybe even the radio hobby. This a hobby that needs a continuous supply of fresh blood. Some people don't have the same writing skills that others possess but are likely talented in other areas. There are a lot of people on this website who don't write very well. Why can't we accept that, move on past it, and try to help these people? I don't think there is anyone here who hasn't made a mistake in more than one post, so remember that when you point your finger at someone there are three pointing back at you.
For your information Robert, your analog TV will cover the 700 MHz band, as these were the upper UHF channel on a TV that is off cable and receiving through an antenna. Analog TV's have channel spacing of 6 MHz and are constructed to work with a very wide signal. Public safety/land mobile radio in the 700 MHz band uses a channel spacing of 12.5 kHz or 0.0125 MHz. An analog TV is not able to tune that narrowly. Additionally, much of the the 700 MHz band is going to have a great deal of digital and/or trunked radio systems, which an analog receiver will not track trunking nor decode digital.
The lower portion of the UHF TV band has been allocated for public safety use in about 4-6 major metropolitan areas. It is called the "UHF T Band" and if I remember correctly, includes 470-512 MHz, which are TV channels 14-20. This limited area allocation was made in the early 80's. Some examples are the Los Angeles PD's use of the UHF-T band for a conventional (non-trunked) digital radio system, the LA Sheriffs Office also has a conventional analog system in the 480 MHz area and the San Francisco Bay area also uses many UHF-T band frequencies.
Please accept my apologies for some of the negative posts that were made in response to your question. New members are not usually treated this way.
For your information Robert, your analog TV will cover the 700 MHz band, as these were the upper UHF channel on a TV that is off cable and receiving through an antenna. Analog TV's have channel spacing of 6 MHz and are constructed to work with a very wide signal. Public safety/land mobile radio in the 700 MHz band uses a channel spacing of 12.5 kHz or 0.0125 MHz. An analog TV is not able to tune that narrowly. Additionally, much of the the 700 MHz band is going to have a great deal of digital and/or trunked radio systems, which an analog receiver will not track trunking nor decode digital.
The lower portion of the UHF TV band has been allocated for public safety use in about 4-6 major metropolitan areas. It is called the "UHF T Band" and if I remember correctly, includes 470-512 MHz, which are TV channels 14-20. This limited area allocation was made in the early 80's. Some examples are the Los Angeles PD's use of the UHF-T band for a conventional (non-trunked) digital radio system, the LA Sheriffs Office also has a conventional analog system in the 480 MHz area and the San Francisco Bay area also uses many UHF-T band frequencies.
Please accept my apologies for some of the negative posts that were made in response to your question. New members are not usually treated this way.
Don_Burke
Member
Not likely.
The wideband receiver in the TV set would have problems with the narrowband signals and some TV sets will mute the audio if no horizontal synch is detected.
TV receivers are also not all that sensitive.
N
N_Jay
Guest
Not to mention that 700 MHz will be almost exclusively digital.
Digital TV transition in the USA
What happens after 2/17/2009 is that full power over-the-air TV broadcasters are being required to turn off their analog transmitters. Just to make things a little more complex, many of them are "moving" their current digital TV signal from where it is now to where their analog signal is now. Those currently broadcasting digitally on channels 52-69 are required to move their signal.
After 2/17/2009 only channels 2-51 will be used. Current channels 52-69 are what will become the 700 MHz band. Free? LOL. The government has divided up the 700 MHz band and auctioned off several portions. The income from these auctions is a major driving force behind this switch of TV to digital. How the 700 MHz band is expected to be used varies depending on the portion of the spectrum (and who won the auctions). That topic is fairly complex, but there is a lot of information out on the 'net if you look for it.
I'd like to point out that WHEN TVs go digital already happened several years ago. I do not subscribe to cable nor satellite and have been watching TV via over-the-air digital signals shortly after they became available in my area. All over-the-air TV signals in the USA currently reside in channels 2-69, including both analog and digital stations.
What happens after 2/17/2009 is that full power over-the-air TV broadcasters are being required to turn off their analog transmitters. Just to make things a little more complex, many of them are "moving" their current digital TV signal from where it is now to where their analog signal is now. Those currently broadcasting digitally on channels 52-69 are required to move their signal.
After 2/17/2009 only channels 2-51 will be used. Current channels 52-69 are what will become the 700 MHz band. Free? LOL. The government has divided up the 700 MHz band and auctioned off several portions. The income from these auctions is a major driving force behind this switch of TV to digital. How the 700 MHz band is expected to be used varies depending on the portion of the spectrum (and who won the auctions). That topic is fairly complex, but there is a lot of information out on the 'net if you look for it.
Last edited:
k9rzz
Member
I think I know the answer, but I'll ask anyway:
When TV goes digital, will there be a scanner that can decode the audio? i.e. Can a digital capable scanner receive digital TV? The reason I ask is that's it awfully handy listening to the news while driving in the car and I'm gonna miss that come next year.
When TV goes digital, will there be a scanner that can decode the audio? i.e. Can a digital capable scanner receive digital TV? The reason I ask is that's it awfully handy listening to the news while driving in the car and I'm gonna miss that come next year.
Don_Burke
Member
k9rzz said:
1. No time soon. The digital signal for TV needs to be picked up in its entirety and the audio pulled from the data stream. That would require a front end and IF section designed to do such things.
2. No. It uses a different digital scheme.
smason
Member
Whoosh!
Anyone know where the frequencies for Channels 2-69 analog are listed? In The Wiki?
Don_Burke
Member
- Status
Similar threads
