[DSP-10] sequencing and control question

[Courtney Duncan]

Hi Bob,

Yes, it continues to be very educational getting the 1296 station  
running the way I want it to.  The good news is that I think I  
understand the transverter issues well enough now to attempt to design  
and homebrew the 432 to 144 version that we talked about (576 LO).   
The bad news is that I don't have any more spare time than before, so  
it will take a while to "get to it."

For sequencing I've decided for this rev to bring out all 8 lines from  
the DSP-10, go ahead and use the two that are already supported as you  
describe, but design my interface board to where it will take  
additional inputs should I want to increase the number of sequencing  
points in software later, just wiring logical ones together for now.   
This means keeping the 23 cm stuff in the same room with the DSP-10  
for now, i.e., not remoting it closer to the antenna, but that's OK  
for now due to the educational nature of the whole project.  I want to  
keep my eye on it while it's working.

I visited KB5MU over the weekend.  He and W5NYV are working on a 10  
GHz project.  We swapped war stories.  He also brought me up to date  
on the Microwave Update held near here last month.  Didn't make it to  
that but might make it to a San Bernardino Microwave Society meeting  
sometime soon (like maybe even this Thursday!).

How did the Marys Peak 24 GHz work go?

73, Courtney, n5bf/6


On Sep 17, 2010, at 11:50 AM, Bob Larkin wrote:

> Hi Courtney,
>
> Sounds like you are still having fun getting the 1296 station  
> together.
>  I have generally used the sequencer in the DSP-10, but it then
> requires running wires from the accessory plug and changing the  
> control
> levels, as the output is 0 volts receive and 5 volts transmit.
>
> The software is all part of the UHFA.EXE, already.  The delays, in
> milliseconds, are programmed from the CFG file.  The details at
> http://home.comcast.net/~kd7ts/v380/4ChFour.htm#T_R_SEQUENCING
> and the pins for control at
> http://home.comcast.net/~kd7ts/v380/5ChFive.htm#HARDWARE_CONNECTIONS
>
> The two control outputs are called Power Amp and Antenna Relay, but  
> they
> can obviously be used in any way that makes sense for sequencing.   
> This
> has worked fine for me.
>
> Have lots of QSO's!
>
> 73, Bob  W7PUA
>
> PS - I am taking a DSP-10 out tomorrow to try to work KD7TS, W7SZ and
> W7GLF on 24 GHz from Marys Peak OR.
>
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"It's science. They don't know anything; they just make a lot of  
educated guesses."  -- Viannah Duncan

Courtney Duncan, n5bf/6
cbduncan at earthlink dot net
1296.100, 1.810.
n5bf at amsat dot org