[Premium-Rx] CIV interfaces available

[Steve Hajducek]

Hi John,

I had meant to sent this earlier, but I have been very busy.

Just an FYI to anyone interested in computer control of WJ units and 
the CIV interface. I have code this and it rather interesting as 
older WJ units use the same RS-232 3-wire arrier Sense Multiple 
Access (CSMA) with Collision Detection interface multi-drop operation 
as ICOM does for its line of Amateur Radio grade Receivers and 
Transceivers and many of their Marine Grade transceivers.

WJ receivers with the CSMA interface include (but may not be limited 
to) the HF-1000, WJ-8710A, WJ8711A, WJ8712A, WJ8712P, WJ8690. ICOM 
CT-17 CI-V Level Converter interface can be used to control up to 4 
WJ receivers directly or 6 by splitting two of the CT-17 ports via to 
the receivers CSMA interfaces.

The actual control codes for the CSMA interface aside from the 
PREAMBLE,  CONTROLLER ADDRESS, GOOD and BAD data however are 
completely different. Thus one can not make use of software coded to 
control an ICOM radio.

The newer 3-wire WJ radios require a Frame Address for its multi-drop 
scheme and is not compatible with this older CSMA system.

/s/ Steve, N2CKH/AAR2EY


At 11:11 PM 7/18/2006, you wrote:
>Hi Group,
>
>In rummaging around in my junk/treasures storage, I have come across 
>2 (two) ICOM CT-17 CIV interfaces.  These are essentially NOS, as I 
>ended up selling my ICOM stuff to buy more Premium-RX's.
>
>As a refresher, these are bidirectional RS-232 to TTL converters 
>with four receiver ports.  There are no cables or documents 
>included, however, the docs are on ICOM America and the cables are 
>all Rat-Shack stock items.
>
>I'll put these two items out there for this group until 6PM 
>Wednesday, Pacific Daylight Time...best offers take them.  Failing a 
>sale here, they go to a certain "reputable" online auction organization.
>
>All correspondence relating to this notice must be taken off line 
>direct to me.
>
>thanks
>
>John Collins