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<div class="moz-cite-prefix">Hi Phil,<br>
<br>
Thanks, I'm gradually getting back into things. I guess what I
really need to know is how to drive the CC bits. Have I got it
correct below?<br>
<br>
C0 = 0x0<br>
C3<br>
Alex Attenuator - self explanatory<br>
Preamp on/off - I guess is a global setting.<br>
Alex Rx Antenna - fair enough I can select None, Rx1, Rx2 here.<br>
Alex Rx out - Set if Alex Rx Antenna > 0 - I presume this
enables Rx 1 Out which can be looped back in?<br>
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<p class="western" style="margin-bottom: 0cm">C4<br>
Alex TX relay - so this selects the Tx antenna and the Rx
antenna unless 'Alex Rx Antenna' is > 0 which then takes
precedence as the Rx input. <br>
</p>
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C0 = 0x12<br>
<br>
C2<br>
Alex manual HPF/LPF select - I assume from this that filter
switching is done in the firmware unless this is set.<br>
<br>
C3/C4<br>
Manual filter settings if C2 set to manual.<br>
Disable Alex T/R relay - receiver only mode?<br>
<br>
C0 = 0x14<br>
C1 RX1-RX4 pre-amp - slightly confused. How does this play with
the 'Preamp on/off' setting and why is it only 4 RX's<br>
<br>
Thanks for any help<br>
73 Bob G3UKB<br>
<br>
On 26/11/2014 04:42, Phil Harman wrote:<br>
</div>
<blockquote cite="mid:6B40647DD9DB4EA183EAE426CEB6A069@ShackPC2"
type="cite">Hi Bob,
<br>
<br>
See page 4 of the Alex Manual obtainable from here:
<br>
<br>
<a class="moz-txt-link-freetext" href="http://openhpsdr.org/documents.php">http://openhpsdr.org/documents.php</a>
<br>
<br>
You can either transceive on Antenna 1, 2 or 3 or Tx on Antenna 1,
2 or 3 and Rx on an antenna connected to Rx1 or Rx2.
<br>
<br>
You can also insert an external filter/preamp/converter etc
between Antenna 1, 2 or 3 and Rx1.
<br>
<br>
Hope that helps.
<br>
<br>
73 Phil...VK6PH
<br>
<br>
<br>
<br>
-----Original Message----- From: Bob Cowdery
<br>
Sent: Wednesday, November 26, 2014 3:48 AM
<br>
To: <a class="moz-txt-link-abbreviated" href="mailto:hpsdr@lists.openhpsdr.org">hpsdr@lists.openhpsdr.org</a> list
<br>
Subject: [hpsdr] Antenna selection
<br>
<br>
***** High Performance Software Defined Radio Discussion List
*****
<br>
<br>
I'm just working out how to code up the antenna switching. I was
looking
<br>
at PowerSDR to see what it did. I've not checked the code and I
can't
<br>
test it as my Alex isn't hooked in yet so was wondering if someone
can
<br>
enlighten me on how it works. It looks like PowerSDR allows both
Antenna
<br>
1-3 and an RX only input to be selected so how does it know which
one to
<br>
use or is it just done on priority i.e. R1/2/XV if selected else
1/2/3.
<br>
<br>
73 Bob G3UKB
<br>
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