[hpsdr] ADC for VSWR Measurement

[Gerd Loch]

Hi Phil,

Please keep patient with me but I still have questions:

SWR measurement needs 2 analog signals: FWD and REV. Are there ideas for the
remaining 2 inputs on Penelope?

why do we not have the ADC for VSWR measurement on Mercury since the analog
signal from Alex is going into Mercury? The cable which is needed to feed
analog signals to Penelope is non standard: 4 pins on Mercury and either
25pins on a DSUB (outside the housing) or an 8 pole header which is not very
well accessible. And cables between cards seem to be in contradiction to the
Bus architecture.

Maybe I write the code for SWR measurement. If so I would like to know your
preferences on which pin(s) on Atlas you would connect the digital output of
the ADC and which dataformat you would choose. Output is on one line, clock
CBCLK is already available on the Atlas-Bus.

Furthermore the Ozy firmware has to be changed/completed and we need to
define how the "analog" signals should be implemented in the USB protocol.

Are there suggestions? Who has done the coding for the FX2 so far?

PWM_out from Penelope: what is it provided for?

Have not yet found a connection for an ATU? (ATU_CTL and ATU_FB)?


73, Gerd
DJ8AY



-----Original Message-----
From: Phil Harman [mailto:phil at pharman.org] 
Sent: Tuesday, August 26, 2008 3:39 PM
To: g.loch at nt-electronics.de; hpsdr at hpsdr.org
Subject: Re: [hpsdr] ADC for VSWR Measurement


Hi Gerd,

The connections you suggest are correct. The 4 spare analogue inputs on 
Penelope are there for exactly this reason but the code is not yet written. 
You will see the code is already there for the ALC on Penelope so you could 
use this as a starting point.

73's Phil...VK6APH


----- Original Message ----- 
From: "Gerd Loch" <g.loch at nt-electronics.de>
To: <hpsdr at hpsdr.org>
Sent: Tuesday, August 26, 2008 5:04 PM
Subject: [hpsdr] ADC for VSWR Measurement


> ***** High Performance Software Defined Radio Discussion List *****
>
> may I ask again?
>
> I found the analog signals (FWD, REFL) going to Mercury J6 and then to 
> a 4 pole connector J3. I suppose that a cable should connect from J3 
> on mercury to to J6 or P4 on Penelope. (my basis is schematic XA9 for
> Mercury) Is this the correct path?
> There are 4 analog inputs AIN1-AIN4 on Penelope. What are they 
> provided
> for?
> Is the analog feedback already integrated in the software for Penelope? If
> yes for which of the four AINs?
>
> 73, Gerd DJ8AY
>
>
>
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