[hpsdr] preselector control

[Henry Vredegoor]

Hi All, Francis, Graham,
 
I think a nice solution would be to have a number of options (or "split"
this project into 2 sub-projects?)
 
- Make a filters-only board-section (let's call it "Alex-Filter") with some
clear junction to the control section to have simple control, like e.g.
Francis' parallel port control solution
- Make a filter-control board-section (let's call it "Alex-Control") with a
more or less "intelligent" control circuit (I2C, CLPD and the like) 
 
Both on the same PCB, as "one board"
 
- If you want an Atlas based Alex, leave the board as-is and populate fully.
- If you want the Alex-Filter remote controlled by Alex-Control cut the
board at the junction and populate both boards fully, put Alex-Control in an
Atlas card slot and wire it to the remote Alex-Filter 
- If you want to have the parallel port solution cut the board at the
junction, populate only Alex-Filter and do not use Alex-Control (save it for
other control related functionality) and interface/wire it to the parallel
port
- If you want to have Alex-Filter controlled by some other means within
HPSDR (e.g. other existing on board CLPD, other I2C), cut the board at the
junction, populate only Alex-Filter and interface/wire it to the appropriate
interface.
 
I think this would give people the most flexibility?
 
Henry.
 
 
-----Original Message-----
From: hpsdr-bounces at hpsdr.org [mailto:hpsdr-bounces at hpsdr.org] On Behalf Of
FRANCIS CARCIA
Sent: woensdag 14 maart 2007 3:20
To: hpsdr at hpsdr.org
Subject: [hpsdr] preselector control



Preselector control could come off the ozy parallel port saving an atlas
slot. A simple static decoder could decode the filter selected. A nice solid
box with coax connectors with filtered control and power leads sounds a lot
easier to do.
 Sorry guys off on a tangent. You have a A/D doing FFT there is no scanning
going on in a preselector anyway. Back under my analog lurker rock. Frank

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