1X ???

We recently switched from cingular to verizon, and got a pair of LG brand
VX5200 camera phones. They are good phones, overall (I'm not terribly
thrilled with them, but they work OK). I've got a question though, which is
NOT answered in the user's manual. On the main (inside) LCD, there is an
indicator reading "1X" (with a box around it). What does this indicator
mean? The user's manual states that it means "1X service". (Like, DUH!)
But what is 1X? I thought these phones were CDMA. Later in the user's
manual, it refers to "1X" being used with a high speed data cable, but we've
never had a data cable connected. -Dave

"Mike T." <hello@howyadoin.now> wrote in message news:439706db$0$85361$892e7fe2@authen.yellow.readf reenews.net...
> We recently switched from cingular to verizon, and got a pair of LG brand
> VX5200 camera phones. They are good phones, overall (I'm not terribly
> thrilled with them, but they work OK). I've got a question though, which is
> NOT answered in the user's manual. On the main (inside) LCD, there is an
> indicator reading "1X" (with a box around it). What does this indicator
> mean? The user's manual states that it means "1X service". (Like, DUH!)
> But what is 1X? I thought these phones were CDMA. Later in the user's
> manual, it refers to "1X" being used with a high speed data cable, but we've
> never had a data cable connected. -Dave
>

No worries, Dave (Mike?).
That "1X" indicates your phone is operating on a CDMA 1xRTT network.
If you Google "1xRTT", you'll get hundreds of thousands of hits.
You'll get a lot more information than I could possibly squeeze into this reply.
It's basically welcoming you to CDMA2000, the Third Generation CDMA.

The 1x is shorthand for saying it operates within exactly the same
spectrum space that the original CDMA occupied, and is compatible with it.
There'll be a follow-on generation someday, called "3x",
which will have triple the bandwidth, but will remain 1x-compatible.

Don't confuse 3x with WCDMA, however.
WCDMA uses about the same bandwidth, but isn't compatible with anything.

"John R. Copeland" <jcopelan@columbus.rr.aol.com> wrote in message news:B6Ilf.172803$tD4.43327@tornado.ohiordc.rr.com ...
"Mike T." <hello@howyadoin.now> wrote in message news:439706db$0$85361$892e7fe2@authen.yellow.readf reenews.net...
> We recently switched from cingular to verizon, and got a pair of LG brand
> VX5200 camera phones. They are good phones, overall (I'm not terribly
> thrilled with them, but they work OK). I've got a question though, which is
> NOT answered in the user's manual. On the main (inside) LCD, there is an
> indicator reading "1X" (with a box around it). What does this indicator
> mean? The user's manual states that it means "1X service". (Like, DUH!)
> But what is 1X? I thought these phones were CDMA. Later in the user's
> manual, it refers to "1X" being used with a high speed data cable, but we've
> never had a data cable connected. -Dave
>

No worries, Dave (Mike?).
That "1X" indicates your phone is operating on a CDMA 1xRTT network.
If you Google "1xRTT", you'll get hundreds of thousands of hits.
You'll get a lot more information than I could possibly squeeze into this reply.
It's basically welcoming you to CDMA2000, the Third Generation CDMA.

The 1x is shorthand for saying it operates within exactly the same
spectrum space that the original CDMA occupied, and is compatible with it.
There'll be a follow-on generation someday, called "3x",
which will have triple the bandwidth, but will remain 1x-compatible.

Don't confuse 3x with WCDMA, however.
WCDMA uses about the same bandwidth, but isn't compatible with anything.
===
Grrr. I'm hopelessly behind the times. Sorry. :-(
Nowadays that "1X" refers to 1x EV-DO (Evolution, Data-Optimized).
1x EV-DV (Data and Voice) will probably be the next phase.
3x will come sometime after that yet.

not entirely correct there John.....\
On my SCH-730 the "1X" indicator means 1X, top speed of around 144K.
If it's on EVDO it shows a box with "EV" in it.
If it is idle it shows a smaller box that displays "1x/ev" in it...

No worries, Dave (Mike?).
That "1X" indicates your phone is operating on a CDMA 1xRTT network.
If you Google "1xRTT", you'll get hundreds of thousands of hits.
You'll get a lot more information than I could possibly squeeze into this
reply.
It's basically welcoming you to CDMA2000, the Third Generation CDMA.

The 1x is shorthand for saying it operates within exactly the same
spectrum space that the original CDMA occupied, and is compatible with it.
There'll be a follow-on generation someday, called "3x",
which will have triple the bandwidth, but will remain 1x-compatible.

Don't confuse 3x with WCDMA, however.
WCDMA uses about the same bandwidth, but isn't compatible with anything.

(my reply)

Yeah, I borrow Mike's computer a lot. Thanks for the information. I take
it that 1X just means I'm connected by CDMA, which is exactly what I
expected. That's cool. -Dave

"Mortimer Schnurd" <Mort@aarp.com> wrote in message news:5ZIlf.28251$7h7.6912@newssvr21.news.prodigy.c om...
>
> not entirely correct there John.....\
> On my SCH-730 the "1X" indicator means 1X, top speed of around 144K.
> If it's on EVDO it shows a box with "EV" in it.
> If it is idle it shows a smaller box that displays "1x/ev" in it...
>

Thanks, Mort.
There must be more different meanings for that indicator than I knew.
Maybe I'll catch up with the real world, if I keep trying.

1x takes about half the bandwidth as older non 1x coding systems use.
Among other things it saves the carrier a great deal of spectrum. Came
out about the same time as GPS. You will find very few Non GPS capable
phones that are 1x. I think it makes the voice sound worse under less
than ideal conditions, I mean they compressed the heck out of voice
data. Some of the best sounding calls are with a good analog signal,
but analog is a huge bandwidth hog and we wouldn't be able to get the
kind of capacity and thus price for so many users, with so few channels
of analog available compared to 1x digital.

-
Dave

1x takes about half the bandwidth as older non 1x coding systems use.
Among other things it saves the carrier a great deal of spectrum. Came
out about the same time as GPS. You will find very few Non GPS capable
phones that are 1x. I think it makes the voice sound worse under less
than ideal conditions, I mean they compressed the heck out of voice
data. Some of the best sounding calls are with a good analog signal,
but analog is a huge bandwidth hog and we wouldn't be able to get the
kind of capacity and thus price for so many users, with so few channels
of analog available compared to 1x digital.

-
Dave

"David L" <davlindi@hotmail.com> wrote in message news:1134048433.845091.249940@z14g2000cwz.googlegr oups.com...
> 1x takes about half the bandwidth as older non 1x coding systems use.
> Among other things it saves the carrier a great deal of spectrum. Came
> out about the same time as GPS. You will find very few Non GPS capable
> phones that are 1x. I think it makes the voice sound worse under less
> than ideal conditions, I mean they compressed the heck out of voice
> data. Some of the best sounding calls are with a good analog signal,
> but analog is a huge bandwidth hog and we wouldn't be able to get the
> kind of capacity and thus price for so many users, with so few channels
> of analog available compared to 1x digital.
> -
> Dave
>
Interesting semantics there, Dave.
The 1x calls are spread throughout the same 1.2 MHz of spectrum space,
so in that sense they occupy the same CDMA bandwidth as any other call.
But the 1x vocoders *do* digitize the voice into a lower data rate,
resulting in a lower information-transfer rate than earlier generations used.

I think the easiest way to characterize it is that a 1x call generates a reduced
level of "pseudo-noise" to the other calls sharing the same spectrum space.
That's the real reason why CDMA 2000 can carry more calls in the same
spectrum space than could the original CDMA protocol.

John R. Copeland wrote:
> "David L" <davlindi@hotmail.com> wrote in message news:1134048433.845091.249940@z14g2000cwz.googlegr oups.com...
> I think the easiest way to characterize it is that a 1x call generates a reduced
> level of "pseudo-noise" to the other calls sharing the same spectrum space.
> That's the real reason why CDMA 2000 can carry more calls in the same
> spectrum space than could the original CDMA protocol.

This is in part due to the point that 1xRTT has much tighter control
over the handset's transmit power. It's not just the codec.

thanks guys..learn something new everyday

Dave