- published: 01 Sep 2010
- views: 7984
Project 25 (P25 or APCO-25) is a suite of standards for digital radio communications for use by federal, state/province and local Public safety organizations in North America to enable them to communicate with other agencies and mutual aid response teams in emergencies. In this regard, P25 fills the same role as the European Terrestrial Trunked Radio (TETRA) protocol, but the two are not interoperable. The major difference between the two is P-25 is expected to work jointly with existing analog systems. Therefore, it uses "simulcast" method for control. "Simulcast" refers to the use of the same set of control channels throughout a given area, which are "simultaneously broadcast, or simulcast" in the region. In contrast, TETRA uses "Multicast," which means the control channel is embedded, therefore there is no need to use a separate channel to broadcast control signals. TETRA provides 4 slots per channel, which means four voice calls can be handled on one channel. This is similar to the GSM cellular system, which allows eight slots or eight users per channel.
The Radio Academy is a registered charity dedicated to 'the encouragement, recognition and promotion of excellence in UK broadcasting and audio production'. It was formed in 1983 and is run via a board of trustees, currently chaired by Chris Burns, Head of Group Operations for BBC Radio.
The Daily Telegraph has described The Radio Academy as "the industry's most powerful body".
The Radio Academy runs a range of events throughout the year, including the annual Radio Festival and the Radio Academy Awards.
The Academy also runs regular Masterclasses for young people who would like to work in radio. In addition, the Academy's Branches regularly hold local events across the country.
The Radio Academy awards a number of honours each year, including induction into its UK Radio Hall of Fame, Fellowships, The John Peel Award for Outstanding Contribution to Music Radio, The PPL Music Icon Award, The Local and Regional Lifetime Achievement Award, The Most Played Artist on British Radio and the 30 Under 30.
Video Presentation The Presentation Team / Kevin Lerner Created for Motorola in 2005 for the P25 Radio Series
This video is part of the Tait Radio Academy. See the entire Introduction to P25 course online at http://www.taitradioacademy.com/courses/intro-to-p25/ For P25, the benefits of trunking often come down to: emergency calls, the dynamic allocation of teams, the ability to share resources between different public safety organizations sharing the cost, and maximizing the coverage of the radio system.
http://wiki.spench.net/wiki/gr-baz#rtl_source_c | Follow me @spenchdotnet http://twitter.com/spenchdotnet OP25: http://op25.osmocom.org/ {{{ Learn more about security flaws in the P25 standard from their white-hat research (e.g. key recovery, remote inhibit...) I will submit the OP25 Decoder GRC block, DES-OFB decryption support and other enhancements to the OP25 project soon! The 'Message Callback' block is part of gr-baz, and allows messages sent by blocks to trigger functions (variable 'set' updates) in the Python code generated by GRC. In this case it allows the FSK4 demodulator to fine-tune the frequency offset of its input.
This video is part of the Tait Radio Academy. See the entire Introduction to P25 course online at http://www.taitradioacademy.com/courses/intro-to-p25/ We’re often asked, “What are the benefits of P25?” Every type of radio system has different pros and cons, so it depends on what you’re comparing to P25. Therefore in this section, we will simply list some of the benefits of P25. These will help you compare P25, either with your existing radio system or other technologies that you are considering.
This is a review of the Raven P25 also known as a "Saturday Night Special." Please subscribe, share, thumbs up and add me to your google+ and circles. Here is my playlist for Rifle and Shotgun reviews - https://www.youtube.com/playlist?list=PLAzscUahKCcaXQ6rApIeMtOcRKXO57oTy Here is my playlist called Fighting for the 2nd Amendment - https://www.youtube.com/playlist?list=PLAzscUahKCcaXQ6rApIeMtOcRKXO57oTy Here is my playlist for other Gear & Accessory reviews - https://www.youtube.com/playlist?list=PLAzscUahKCcZ-OdZy1AWM9nw6YXVFfI00 Here is my playlist for various Handgun reviews - https://www.youtube.com/playlist?list=PLAzscUahKCcZd9BlKXyIBX4uoYI0cruyt Here is my playlist for range test reviews - https://www.youtube.com/playlist?list=PLAzscUahKCcbOdAWWrdxv0zRKokXBrkwI Twitter @ h...
В видео показан сеанс радиосвязи в режиме APCO P25 на частоте LPD диапазона 433.500МГц, а так же то, как принимается цифровой сигнал обычным аналоговым приёмником. Использованное оборудование: радиостанция Motorola XTS1500, приёмник Uniden BC125AT. Подписывайтесь на канал, не пропустите новые видеоролики. Группа ВКонтакте: https://new.vk.com/igoninalexey Instagram: https://www.instagram.com/hamradio_from_russia/
I captured P25 digital and FM audio and video from the Richmond, VA 900Mhz repeater (WA4FC/R). Thanks to Dave (N4MW) and Fred (WB4KXS) for the great dialog :) Thanks to FieldComm for repeater use, care, and feeding: http://www.fieldcomm.org The HT's we're all using are EF Johnson 5100's configured with both FM and P25 modes.
This is the way I live.
Lil' Boy still pushin' big wheels
I stack my money, lay low, and chill.
Don't need to work hard that's the way I feel, I feel, I
This is the way I live.
Lil' Boy still pushin' big wheels
I stack my money, lay low, and chill.
Don't need to work hard that's the way I feel, I feel, I
This is the way I live.
Six months later now we're big dog status.
Name elevated but I still act average.
Rockin' shows in Dallas, ball like I play for the Mavericks.
West Bank rapper and I'm one of the baddest.
French Rivera spot and I'm getting in shape man.
I think I'm Super M-a-n without a cape man.
Ridin' all day hustlin'; all for the cake man.
I'm a Benjamin stack one inch taller than Great Danes.
First they made cheap Ray-Ban like a felon.
I'm growin' up now spittin' hotter than Mohellans
I'm a steal every girl ever gon' to fly.
I'm a young little dude, stay runnin' from cops.
Emerald Row is the place where I got my props.
People love me in da hood they don't want me to stop.
So uhh, that's the only way I know how to rock.
And I'm a stay rappers like won't stop ‘til I drop.
This is the way I live.
Lil' Boy still pushin' big wheels
I stack my money, lay low, and chill.
Don't need to work hard that's the way I feel, I feel, I
This is the way I live.
Lil' Boy still pushin' big wheels
I stack my money, lay low, and chill.
Don't need to work hard that's the way I feel, I feel, I
This is the way I live.
I I's Baby Boy and I done it again.
I'm ridin fly with D-Wizzle in ‘cedes Benz
Twenty two wanna ride with the ladies then
Red Bull, Grey Goose, now the ladies bent
Now we go and do a thing under a shady tent
And they don't question what I say cause I'm a ladies pimp.
See this little one right here this fellow got stripes.
And I is represent, my rail room for life.
Money in my pocket but I still act trife
While I in da club they say the parlor a'int right.
Look I'm-doing great that's the way I feel.
Hustlin' hard all day that's the way I live.
This is the way I live.
Lil' Boy still pushin' big wheels
I stack my money, lay low, and chill.
Don't need to work hard that's the way I feel, I feel, I
This is the way I live.
Lil' Boy still pushin' big wheels
I stack my money, lay low, and chill.
Don't need to work hard that's the way I feel, I feel, I
This is the way I live.
This the two-seat rider with the ketchup inside.
Red pepper paint must believe my ish ride.
They pause like stop signs when they rollin' up.
Cause' when the doors open up, they open UP.
I'm Lamboin' it I was stashed, off stage I'm throwin' it.
Cause they say I'm like Katrina with money, I blow the shhhh.
Real been gravy, three years out of da eighties.
Solos, shabo's valley animals played it.
Commodores mirages, not the Nike hirages.
It cost 250 on up to put your foot inside this.
Y'all was wearing rocks that was my time to shine.
Don't give me viesels y'all thinkin' this McDonalds size.
I been fly I I I I I I I I from the crib to the ri I I I I I de
Fifty-Four inch screens 26 inches from the ceiling dude.
The plasma look like a projector up in da livin' room homie!
This is the way I live.
Lil' Boy still pushin' big wheels
I stack my money, lay low, and chill.
Don't need to work hard that's the way I feel, I feel, I
This is the way I live.
Lil' Boy still pushin' big wheels
I stack my money, lay low, and chill.
Don't need to work hard that's the way I feel, I feel, I