[hpsdr] New HPSDR Board

[Phil Harman]

Hi Phil,

I would prefer not to add user interface stuff. As it is I will need to 
create an interrupt whenever the input data changes since I don't want to 
have to poll the I2C or I could add an I2C  master to the CPLD.

Perhaps we could use the inputs on the Ozy board for an opto encoder  - a 
nice 1000 pulses per revolution to tune the radio would be nice.

I may have to reconsider this since I see some suggestions about  ADC and 
DCA. I've found in the past that to measure SWR you really need to do that 
calculation  really fast and close to the bridge - passing the values to a 
PC and not sampling forward and reflected together simultaneously causes 
some nasty problems.

It looks like a MAX II will make a very nice crosspoint switch, just reading 
an Altera application note on the subject.

I'll update the block diagram once we get some more feedback.

73's Phil....VK6APH
----- Original Message ----- 
From: "Philip Covington" <p.covington at gmail.com>
To: "Phil Harman" <pvharman at arach.net.au>
Cc: <hpsdr at hpsdr.org>
Sent: Wednesday, September 27, 2006 9:10 PM
Subject: Re: [hpsdr] New HPSDR Board


> Hi Phil,
>
> How about an optical encoder input or is this board intended more for
> non-user interface type stuff?  If there is enough IO left over for
> that...
>
> 73 de Phil N8VB
>
> On 9/27/06, Phil Harman <pvharman at arach.net.au> wrote:
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> I've put together some ideas on an  interface board for the HPSDR project
>> that will plug into the Atlas bus.
>>
>> It's a general purpose input/output board for interfacing external 
>> equipment
>> such as amplifiers, mast head preamps,  VHF/UHF/SHF transverters etc.
>>
>> Feel free to give feedback on the features and facilities that you would
>> like to see on such a board.
>>
>> The board, called Epimetheus (or Epi for short) is on the Wiki at
>>
>> <
>> http://hpsdr.org/wiki/index.php?title=HpsdrWiki:Community_Portal
>>
>> >
>> under Epimetheus.
>>
>> 73's Phil....VK6APH
>>
>>
>>
>>
>>
>>
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>
>
>
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