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[aprssig] D710 standalone control head!

Andy AB9FX ab9fx at aprs.pl
Tue Oct 2 20:11:12 UTC 2007


In TM-D710 there are two COMs. One in the body, one in the display unit, and of course another for GPS/WX in the display unit.
73
Andrzej SP3LYR

  ----- Original Message ----- 
  From: Stephen H. Smith 
  To: kb2scs at optonline.net 
  Cc: TAPR APRS Mailing List 
  Sent: Tuesday, October 02, 2007 3:19
  Subject: Re: [aprssig] D710 standalone control head!


  kb2scs at optonline.net wrote: 
Hi Stephen
                    See below.
On 1 Oct 2007 at 17:46, Stephen H. Smith wrote:
Snip
  One question I have is:

Does the head have some kind of RS-232 serial port connection on it so 
that you could connect it to an external computer with APRS program as 
you do in the D700/710 "packet " mode.
    
No
It would be nice if it did. As long as the main radio body had one 
also.
Which of course the main body does but again the Head does not.

Let us hope we never witness the "Silence Of The Hams"
73 DE John  KB2SCS
       E-Mail:            kb2scs at arrl.net
       APRS-SCS     http://www.tapr.org/~kb2scs
       Web Page:     http://www.qsl.net/kb2scs
  
  I'm really puzzled now.   If the TNC is in the control head, and the 710 supports the same kind of "packet mode" operation as the 700 with an external computer/terminal,    then there must be some way TNC data is getting to the main chassis where the serial port connector is located.     


  Is it interleaved in the data stream carrying radio control functions (volume, squelch, channel,etc.) from the head to the main chassis? 
  |  

  Or perhaps separate TTL-level signals in other conductors of the head-to-radio cable with conversion to true RS-232 levels inside the main chassis?



  --

  Stephen H. Smith    wa8lmf (at) aol.com 
  EchoLink Node:      14400    [Think bottom of the 2M band]
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