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Paging system
Posted: Tue Apr 13, 2010 6:24 am
by ronnywadilie
Hi there ,
i am busy with setting up a paging system(Pocsag).
Making use of a M15 ,a M33 and a GM360 ,as link transmitter.
As paging transmitter ,I am using a m66 interfaced to a NAC.
From M15 to output NAC is working,but does not activate my beeper.
Any advise ?
Re: Paging system
Posted: Tue Apr 13, 2010 7:49 am
by Bill_G
And the output on your service monitor looks like .......?
Re: Paging system
Posted: Tue Apr 13, 2010 12:36 pm
by ronnywadilie
Dev level:4.6 Khz
Monitor looks like a digital signal.
Not sure whether my settings on the M33 are good or not.
Re: Paging system
Posted: Tue Apr 13, 2010 2:13 pm
by Bill_G
Interesting. I have never seen a mobile do digital paging without screwing it up. Just not linear enough. But, I haven't done it with the CDM series. Okay - so you're using an old Motorola M15 terminal. Will it do pocsag? I thought it was flex only. Or are you talking about Zetron products - the Zetron M15, M33, and M66 terminals and controllers?
Re: Paging system
Posted: Thu Apr 22, 2010 5:58 am
by RFguy
Try inverting the data (either in the pager programming, or in the encoder programming)
Re: Paging system
Posted: Thu Apr 22, 2010 6:02 am
by RFguy
Bill_G wrote:Interesting. I have never seen a mobile do digital paging without screwing it up. Just not linear enough.
In this case the mobile is sending analogue modem tone. It's not until after the M66 that it is digital.
He mentions using a "NAC" for the paging TX. I don't know what a NAC is.
FYI, we have done several installs using GM300's for digital paging TX (512 baud POCSAG). Just use the flat TX input. Very sucessful.