[Premium-Rx] WJ-8712 Firmware.

[Danny Higgins]

Hi Dave.

I can't help with anything WJ specific, but I have built a PIC based
controller for my Racal RA3702/MA3752/TA3762 using a cheap off the shelf PIC
Development board with a bit of interface circuitry around it.  The software
is fairly modular, written using the free Microchip C compiler, so it
shouldn't be too difficult to modify the module that sends the message in
the correct format to the radio.  Circuits, PCB artwork (using the free
Eagle PCB design program) and software are available if you want them.

Danny, G3XVR

-----Original Message-----
From: premium-rx-bounces at mailman.qth.net
[mailto:premium-rx-bounces at mailman.qth.net] On Behalf Of David Schofield
Sent: 22 February 2012 13:04
To: premium-rx at mailman.qth.net
Subject: [Premium-Rx] WJ-8712 Firmware.

Hi All,

Does anyone know what the latest version of firmware released for the
WJ-8712 was?
Mine has version 3.0.1 control, and 4.0.0 DSP.
I'm just curious to know if there is any later firmware out there, or even
better, if there is obtain a copy...

The most frustrating thing about my WJ-8712 compared to my WJ-8711A is the
fact that the SSB bandwidth is fixed at 3.2Khz, which seems weird as it's
only derived in the DSP so I don't know why WJ did it like that in the first
place.
It would be nice for it to be variable up to the bandwidth of the roofing
filter the same as the 8711A.

I'm tempted to try a copy of my WJ-8711A firmware in it, as it used the same
PCB's  but haven't been brave enough so far, theirs a lot of money's worth
of kit at stake should something go drastically wrong.

I'm also tempted to make a PIC based front panel for it, as it would be
pretty straight forward to get the PIC to run round a loop scanning some
buttons and issuing the required serial command from a lookup table if it
detects a button push.
Before I start playing with doing it that way, has anyone else tried
anything similar, or is it easier to use the "Test connector" on the front
panel, which is in effect where the front panel would plug in, in a WJ8711A.
In fact their is a "test jig" referred to in the manual, which is in effect
identical to a WJ-8711 but "without the guts" of the receiver.
At a guess these are unobtainable, akin to rocking horse droppings, but if
anyone in the group has one they would like to throw away it would be much
easier to use one of these rather than re inventing the wheel :-)


Thanks again in advance,
Dave.S.
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