[aprssig] Text Pagers

[Ben Jackson]

On 2/12/2009, "Scott Gillis N3UJJ" <lists at n3ujj.com> wrote:

>Bob (and all),
>
>When I looked at the pagers I was focused on Freq, everything I read said I
>should be looking for the 140Mhz models. I have to be back up in Baltimore
>this weekend, I'll see if I can make arrangements to see them again....
>
>Any suggestions on what I should look for?
>
>The box I saw had about 50 pagers, all were for 900Mhz (per the guy showing
>them to me), the few I did look at were 900Mhz most of them were Motorola.

A lot of the 900MHz Motorola pagers use the FLEX protocol as opposed to
POCSAG.

http://en.wikipedia.org/wiki/FLEX_(protocol)

Judging from this:

http://www.commsdesign.com/main/9809/9809fe1.htm

and a talk that I had with a 900MHz Motorola guy from one of the local
mailing lists in MA, the FLEX protocol requires some kind of timing done
at the transmitting site so that the receivers know when to listen.

Could you be a bit more specific about what model the pagers are?