Findi Walkie Talkie w/ FM (not FSK)

Sat Jan 28, 2012 1:00 pm   

Can anyone advise how I can tell if a walkie talkie uses FM or FSK? It
is not given in the sales info.

Without attempting to contact every manufacturer, and hope for a
reply, is there anyway I can determine this from the general specs, or
by price, or brand?

I am looking at the low end Midland models, for example.

Larry perkins

Sat Jan 28, 2012 1:36 pm   

"Larry Perkins"



** I doubt there are any "walkie talkies" that use FSK.

What on earth make YOU think there are any ?

AM on the 27MHz band is the norm and FM elsewhere.



..... Phil

Sat Jan 28, 2012 3:05 pm   

On Sat, 28 Jan 2012 12:00:24 +0000, Larry Perkins wrote:


It's very unlikely any walkie talkie would use FSK at all. Are you
talking about radios for voice communication, HAM radio stuff with
digital modes or RF modules usually employed in remote controls?
HAM radio, military or special gear aside, most (probably all) recent
walkie talkies use FM, some old CB ones (maybe airband VHF portables too)
would use AM instead.

Sat Jan 28, 2012 10:14 pm   

On Sat, 28 Jan 2012 13:05:13 +0000 (UTC), asdf <asdf_at_nospam.com>
wrote:



There is FSK, at least in Eurpoe. Please see these links:

http://en.wikipedia.org/wiki/PMR446

http://en.wikipedia.org/wiki/Digital_private_mobile_radio

How common is the protocol? IOW if one were to purchase the digital
version would this of necessity be described on the packaging?

And the feature would probably be restricted to high end business or
industrial models?

Anyone know for sure.

Larry

Sat Jan 28, 2012 10:56 pm   

On Jan 28, 7:00 am, larryperk...@questron.com (Larry Perkins) wrote:

If the products are sold in the USA, then you should be able to find
the complete specifications at the FCC's Office of Engineering and
Technology's online equipment authorization database.
Link: http://transition.fcc.gov/oet/ea/fccid/

Look for the "Advanced Search" button, since you likely won't have the
FCC ID's numbers from the product's label, packaging or User Manual to
start from.
You could also Google image for the manual or photo to get the ID's
individually, etc...
Once you know the first 3-letter code for a given manufacturer, you
can probably get all their walkie-talkie products at once (one query).
However, for a company like Midland, you're likely to get a whole lot
more results returned than just walkie-talikes.
For example, I know they make (or once made) CB radios, and weather
radio receivers, just to name a few.

In the Advanced Search, you can narrow down the returned results by
entering the frequency ranges of interest.
That should weed out a lot of unwanted hits.

-mpm

Sat Jan 28, 2012 11:00 pm   

On 1/28/2012 2:14 PM, Larry Perkins wrote:

The OP asked if there was any way to tell if a walkie talkie used FSK.

The amount of advertising on the packages would be the first tell-tale sign.

It looks like these devices need to be switched into digital mode.

Second tell tale-sign.

In other words, RTFM.

don

Sun Jan 29, 2012 1:21 am   

"Larry Perkins"


** You are posting from Australia - right ?

The license free requirements for UHF CB allow only certain frequencies
between 476 and 477 MHz.

http://en.wikipedia.org/wiki/UHF_CB

You will not find any dPMR radios on these frequencies.



..... Phil

Sun Jan 29, 2012 8:17 am   

"Larry Perkins" <larryperkins_at_questron.com> wrote in message
news:4f23e1f7.5465531_at_news.tpg.com.au...

for Voice they use FM, Single Side Band Upper, Single side band lower, and
AM (the last three are used in the CB band) but walkie Talkies are in many
bands, which band do you have? GPRS is FM

But not FSK, that is digital, does your walkie talkie have a connection for
computer?

Sun Jan 29, 2012 6:47 pm   

On Sat, 28 Jan 2012 21:14:47 +0000, Larry Perkins wrote:


Thanks. I completely forgot about digital PMR radios.
They talked about them years ago but I still didn't find one in shops.

Mon Jan 30, 2012 3:46 am   

OK, it would seem the digital versions are rare, at least in the
current consumer market. Now I know. Thanks to all.

Larry

Mon Jan 30, 2012 8:51 am   

"Larry Perkins" <larryperkins_at_questron.com> a écrit dans le message de news:
4f2462dc.214796_at_news.tpg.com.au...

Hello Larry,
Here in Europe the 446MHz digital walkie/talkies are very common, I guess
even more common than their analog versions. Prices start at around 50Eur
for a pair (70usd ?), so they are definitively not limited to high end
applications. The marketing brochures talk about a 5 to 10km range, I guess
that 1 or 2km would be a more reasonnable assumption... Motorola is one of
the manufacturers.
Yours,
Robert