[hpsdr] ADC interface; was: Re: [Flexradio] A/J/O + 100 watt SDR 1K

[Alfred Green]

I've moved this over to the hpsdr list, as my question is not really 
FLEX-related.

-----Original Message-----

>>From: Bill Tracey [mailto:bill at ewjt.com]
>>Sent: Tuesday, August 14, 2007 12:58 AM
>>To: Thompson, Peter; john_eckert at agilent.com; flexradio at flex-radio.biz
>>Subject: RE: [Flexradio] A/J/O + 100 watt SDR 1K
>>
>>Well I just looked at the code and the amplifier ADC is definitely not 
>>being read via OJ ... it in fact is being read directly from the 
>>parallel port which would seem to me that you'd get back garbage data 
>>since presumably there's nothing connected to the parallel port.
>>
>>If you want to confirm the code is in the path I think it is, run 
>>PowerSDR from the command line with stdout and stderr redirected to a
>>file:
>>
>>PowerSDR 2>&1 >runlog.txt
>>
>>And look at the contents of runlog.txt after running -- if the code is 
>>were I think it is you'll see some messages like:
>>
>>          warning - Ozy ADC read not implemented!!
>>
>>Next time I'm in there changing code I will change it to explicitly 
>>fail if you try and read the ADC  via OJ  -- this will be temporary  
>>until I've gotten the read ADC code written, something I hope to get 
>>to soon as I've now installed the 100 watt amp in my SDR 1000.
>>
>>    
>>
Bill,

Could you give us a bit of an overview as to how this would all be 
connected together? I have the 1W SDR1000, and a homebrew external amp 
for when I operate HF.  I can hang an ADC onto the power sensor, but 
what type of interface would I need? Does it go into the DB25 on Ozy, or 
directly into the PC? I've looked for the 100W amplifier schematic, but 
I don't find anything that seems helpful.
I didn't realise that such functionality was being considered, and was 
expecting to have to do it myself one day. However, since I've never 
written any FPGA code it would be quite a stiff climb.
I certainly want to get to where the only connection between the rigs 
and the PC is through AJO via a USB port.

Tnx & 73, Alf  NU8I 
Scottsdale  AZ  DM43an