[aprssig] D710 questions

Sat Aug 22 22:05:42 EDT 2009

Thank you all for your help

Andrew

----------------------------------------------------------
Andrew Rich 
Aiways Technical Officer Grade 4
Surveillance - RADAR ADS-B
Amateur Radio Callsign VK4TEC
email: vk4tec at tech-software.net
web: www.tech-software.net
  ----- Original Message ----- 
  From: Stephen H. Smith 
  To: Andrew Rich (Home) ; TAPR APRS Mailing List 
  Sent: Sunday, August 23, 2009 9:41 AM
  Subject: Re: [aprssig] D710 questions

  Andrew Rich (Home) wrote: 
    The com port speed seems to be the "head" connector speed ? 

    The PC port speed is the speed of the connector on the body ? 

    Odd. I would have thought it passed straight thru 

    I need a diag 

  The main chassis of the TM-D710 is absolutely identical to the non-APRS TMV-71.   *ALL*  APRS functionality (firmware, TNC, TNC and GPS ports, etc) has been moved into the control head.   

  Kenwood sells the head alone as the RC-710.   You can upgrade a TMV-71 to a D-710 merely by replacing the TMV's oem head with the RC-710.    Further the RC-710 can be usedas an all-in-one self-contained APRS terminal (i.e. sort of a Ham Hud package), by making TX/RX audio, PTT, and squelch connections with any 2M rig .   In this standalone mode (once you provide the 8 VDC power the head requires), the controls for radio functions such as volume, squelch, PL tone, etc don't do anything -- only the APRS/TNC-related menu items function.  

  As a result, the serial port on the head is exclusively for APRS-related TNC functions.   

  The physically-identical serial port on the main chassis is  exclusively for radio "CAT" (computer aided tuning); i.e. programming frequency memories, remote-controlling band, frequency, repeater offsets & tones, etc.  

  The two 8-pin mini-DIN serial jacks (on the head, and on the main chassis) have the same pinout as the serial ports on classic Apple Macintosh computers (during the era before USB when Macs HAD serial ports!).  A Mac serial cable with a mini-DIN on one end and a DB9 on the other  (intended to connect non-Apple serial devices to a Mac) will work with both these connectors.   Around here, at least (southern California), you can buy   8-pin-MIni-DIN-to-8-pin-Mini-DIN  "Mac serial cables" at large computer or electronics stores for USD $7-$10.  Buy a 10-footer and cut it in half to get two 5-foot cables with a molded-on Mini-DIN plug on one end, and flying leads for your own DB connectors on the other. 

  The 6-pin MIni-DIN "packet/data" jack on the main chassis is identical to such jacks on many other Japanese ham radios of the last two decades or so.   It provides raw discriminator audio, de-emphasized and squelched audio, TX audio in, PTT and COR/Squelch Indicator out.   Despite the misleading labeling of this as a "data" jack, THERE IS NO DATA (in the sense of RS-232 or TTL level streams) HERE -- only tx and rx AUDIO.   Full details  on this connector are in this document on my website:

       <http://wa8lmf.net/miscinfo>   

  Scroll down the list of downloadable stuff and look for:     

       MiniDIN6-Packet.pdf 

  --

  Stephen H. Smith    wa8lmf (at) aol.com 
  EchoLink Node:      WA8LMF  or 14400    [Think bottom of the 2M band]
  Skype:        WA8LMF
  Home Page:          http://wa8lmf.net

  JavAPRS Filter Port 14580 Guide 
    http://wa8lmf.net/aprs/JAVaprsFilters.htm

  "APRS 101"  Explanation of APRS Path Selection & Digipeating 
    http://wa8lmf.net/DigiPaths 

  Updated "Rev H" APRS            http://wa8lmf.net/aprs
  Symbols Set for UI-View, 
  UIpoint and APRSplus:

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