Trunking and Digital

[nec208]

Does anyone know the year Trunking and Digital came out ? Like this new stuff no more than 15 years old??

What about other Digital stuff like iDEN,Tetra,P25,LMR,D-Star are they 10 years old? What about Aegis,Astro ,VSELP,ProVoice,OpenSky are they 5 years old?

Well DES/DVP/WEP and Spread Spectrum seem to be new.

And why is Digital stuff so much better than analog ?

 

[N_Jay]

Does anyone know the year Trunking and Digital came out ? Like this new stuff no more than 15 years old??

What about other Digital stuff like iDEN,Tetra,P25,LMR,D-Star are they 10 years old? What about Aegis,Astro ,VSELP,ProVoice,OpenSky are they 5 years old?

Well DES/DVP/WEP and Spread Spectrum seem to be new.

And why is Digital stuff so much better than analog ?

Trunking late 70's
Digital, all different times (What do you mean by "Digital)
iDEN (was MIRS) developed in the late '80's rolled out in '92-'94
Tetra a few years after iDEN
P25 started in late '80s, first set of standards about '94
LMR ??? What is LMR (Land Mobile Radio, '34)
VSELP as a vocoder late 80's, If you mean "Motorola Astro" then early 90's
Provice Mid 90's
OpenSky Late 90's
DVP/DES Early 80's (Maybe late 70's)
WEP??? (You mean WiFi?) WiFi Late '90s with roots back to late 80's
Spread Spectrum, I think the military had some in the '60s

 

[ka3jjz]

D-Star is Icom's latest take on digital, and it's only been out a year or two. It's not compatible AFAIK with other protocols such as P25. Why they did this is completely beyond me.

73s Mike

 

[N_Jay]

D-Star is Icom's latest take on digital, and it's only been out a year or two. It's not compatible AFAIK with other protocols such as P25. Why they did this is completely beyond me.

73s Mike

Oops missed D-Star.
Standard in 2001, and products about 2003.

It is not a iCOM development, it is a open standard developed in Japan.
The "Why" is answered in the wiki;
"Funded by the Japanese government and administrated by the JARL, investigation was put into finding a new way of bringing digital technology to amateur radio"

 

[nec208]

Trunking late 70's
Digital, all different times (What do you mean by "Digital)
iDEN (was MIRS) developed in the late '80's rolled out in '92-'94
Tetra a few years after iDEN
P25 started in late '80s, first set of standards about '94
LMR ??? What is LMR (Land Mobile Radio, '34)
VSELP as a vocoder late 80's, If you mean "Motorola Astro" then early 90's
Provice Mid 90's
OpenSky Late 90's
DVP/DES Early 80's (Maybe late 70's)
WEP??? (You mean WiFi?) WiFi Late '90s with roots back to late 80's
Spread Spectrum, I think the military had some in the '60s

What is the point of all those different ways of transmitting and picking them up.


I thought Digital is 0's and 1's and analog represents data in variation ??

 

[N_Jay]

What is the point of all those different ways of transmitting and picking them up.


I thought Digital is 0's and 1's and analog represents data in variation ??

Please restate your question.

Provide examples of other technologies or markets where there is "one bast way" to do anything.

 

[nec208]

I take it you are some company that wants to make sale

 

[N_Jay]

I take it you are some company that wants to make sale

Hu?

Did you try giving your question any more thought?

Did you try answering my question?

If you have a preconceived answer to you question, why don't you state it directly so it can be discussed, instead of playing your "answer me this game!

 

[loumaag]

Original question asked and answered.

This is not the Tavern, nor is it even the General Scanning forum. We will not abide this nonsense here.

Closed.