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[aprssig] RFM22B UHF Transceiver Module

John Wiseman john.wiseman at cantab.net
Wed Dec 12 09:13:54 UTC 2012


Steve,

Yes, it is a transeiver, and has busy channel detect, including a signal
strength readout. 

John

-----Original Message-----
From: aprssig-bounces at tapr.org [mailto:aprssig-bounces at tapr.org] On Behalf
Of Steve Noskowicz
Sent: 12 December 2012 05:22
To: TAPR APRS Mailing List
Subject: Re: [aprssig] RFM22B UHF Transceiver Module



RF modulation difference aside ... Don't know it I'm following this 100%,
but since it is a TRANSceiver, this means it can listen for busy channel,
right?

73, Steve, K9DCI  


--- On Tue, 12/11/12, John Wiseman <john.wiseman at cantab.net> wrote:
> Bob.
> 
> Depends what you mean. The interface into the TNC from the application 
> is ax.25. The on-air modulation and packet formats are not the same as 
> current TNC's. So you need an RFM module at each end of a link, but it 
> should work with any KISS-enabled application.
> 
> John
> 
>  
> 
> -----Original Message-----
> From: aprssig-bounces at tapr.org
> [mailto:aprssig-bounces at tapr.org]
> On Behalf
> Of Robert Bruninga
> Sent: 11 December 2012 21:51
> To: TAPR APRS Mailing List
> Subject: Re: [aprssig] RFM22B UHF Transceiver Module
> 
> On Tue, Dec 11, 2012 at 2:13 PM, John Wiseman 
> <john.wiseman at cantab.net>
> wrote:
> > At the moment I'm running with 9600 GFSK, which is done
> by the module.
> 
> I assume you are not making it AX.25 compatible at this time.  That 
> woule be an entire additional leverl of effort to make it compatible 
> with existing APRS radios and their 9600 GMSK of AX.25...  bob
> 
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