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[aprssig] Automatic omni DF query

Stephen H. Smith wa8lmf2 at aol.com
Wed Feb 11 23:44:51 UTC 2009


Bill Vodall WA7NWP wrote:
> So what path do we use to put our HD TV on APRS?
>
> I got it.   I even have two redeemed HD coupons and I'll do the third
> when I find a converter box with Sony/Separate video output.
> Unfortunately the TV coupons are specifically not valid for "good"
> converters.
>
> An no - even if there was such a thing as coupons for new ELT's there
> are those that wouldn't find it necessary since they rely on APRS.
>
> Bill
>
>   

Two coupon-qualified boxes that DO have S-Video out are the Channel 
Master CM-7000 (generally reviewed as the best box, period), and the 
Apex DT-250 available at Best Buy.   Both these boxes also have the 
Smart Antenna control output for automatically-steered active 
directional antennas.   The Channel Master is typically $30 after 
coupon, while the Apex is only $10-20 after coupon.  

Another one of interest is the "Airlink 101" which is only $40 and is 
net zero after coupon. Although it doesn't have S-video out (only ch3/4 
RF and composite), the real attraction of this box is that it's chassis 
actually operates on +12VDC via a wall wart with the same coax power 
connector used on TNCs.   Connecting this box to a laptop with analog 
NTSC video-in, or a 5" DC-capable TV, gives you a DTV receive setup that 
can operate on emergency power from a ham station's 12VDC battery plant.

By the way, all three of these boxes have analog passthough.  


------------------------------------------------------------------------

--

Stephen H. Smith    wa8lmf (at) aol.com
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World Digipeater Map
  http://wa8lmf.net/APRSmaps

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,
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