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Hi Tony,<br>
<br>
As Joe has suggested, the most robust configuration includes
filters. Some have found them absolutely necessary to avoid
overload from strong stations nearby. In my case, I live in a rural
area on a mountain top. I have several transmitting towers in
sight; however, they are about 15 miles away. In several years of
operating, I've only seen ADC overload from on-air signals one time
--- that was from a neighbor who is a ham. So, the message is that
"your mileage may vary."<br>
<br>
If you're thinking of purchasing a Hermes and trying to decide about
filters, you should consider your situation relative to strong
nearby stations. Alternatively, if you think you most likely won't
need filters, you could get the Hermes first and then decide.<br>
<br>
Unless you are in an "ADC overload" situation, the filters won't do
anything to make the reception better --- I believe you'll find
Hermes quite enjoyable, by the way.<br>
<br>
73,<br>
Warren NR0V<br>
<br>
<div class="moz-cite-prefix">On 2/21/2014 12:32 PM, Tony Hagen
wrote:<br>
</div>
<blockquote cite="mid:261914EB05D2428FA87431EDD628A3A6@cedalabz"
type="cite">
<pre wrap="">***** High Performance Software Defined Radio Discussion List *****
</pre>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe UI'; COLOR:
#000000">
<div>Hello Joe,</div>
<div> </div>
<div>That means its recommendable to use a HPF or in other
words Alex</div>
<div> </div>
<div>Thanks</div>
<div> </div>
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe UI'; COLOR:
#000000">73s<br>
Tony</div>
<div style="FONT-SIZE: small; FONT-FAMILY: 'Calibri';
FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal;
TEXT-DECORATION: none; DISPLAY: inline">
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<div> </div>
<div style="BACKGROUND: #f5f5f5">
<div style="font-color: black"><b>From:</b> <a
moz-do-not-send="true" title="k5so@valornet.com"
href="mailto:k5so@valornet.com">Joe Martin K5SO</a>
</div>
<div><b>Sent:</b> Friday, February 21, 2014 11:49 PM</div>
<div><b>To:</b> <a moz-do-not-send="true"
title="prosdr@gmail.com"
href="mailto:prosdr@gmail.com">Tony Hagen</a> </div>
<div><b>Cc:</b> <a moz-do-not-send="true"
title="hpsdr@lists.openhpsdr.org"
href="mailto:hpsdr@lists.openhpsdr.org">hpsdr@lists.openhpsdr.org</a>
</div>
<div><b>Subject:</b> Re: [hpsdr] Hermes</div>
</div>
</div>
<div> </div>
</div>
<div style="FONT-SIZE: small; FONT-FAMILY: 'Calibri';
FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal;
TEXT-DECORATION: none; DISPLAY: inline">Hi Tony,
<div> </div>
<div>Yes, certainly. </div>
<div> </div>
<div>But of course you won’t have any HPF or LPF filtering
for the input in that case. </div>
<div> </div>
<div>If you’re using the stand alone Hermes as an IF for a
converter that has some image filtering ahead of it it
works fine like that. If, on the other hand, you connect
directly to an antenna then you are susceptible to ADC
overloading from out-of-band strong signals that may be
present at your location anywhere in the 0-60 MHz range,
regardless of where you have the Hermes tuned, that’s
all. It’ll work fine but keep in mind that your Hermes
ADC is converting signals for everything in the 0-60 MHz
range at your location and strong out-of-band signals will
affect you much more so than if you had filtering ahead of
the Hermes. </div>
<div> </div>
<div>73, Joe K5SO</div>
<div>
<div> </div>
<div>
<div>On Feb 21, 2014, at 10:26 AM, Tony Hagen wrote:</div>
<br class="Apple-interchange-newline">
<blockquote type="cite">***** High Performance Software
Defined Radio Discussion List *****<br>
<br>
<div dir="ltr">
<div dir="ltr">
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe
UI'; COLOR: #000000">
<div>Hi,</div>
<div> </div>
<div>Is the Hermes Board standalone is capable
to receive without the Alex Interfaced</div>
<div> </div>
<div> </div>
<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe
UI'; COLOR: #000000">73s<br>
Tony</div>
</div>
</div>
</div>
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