[aprssig] D710 questions

[Stephen H. Smith]

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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