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<DIV>What’s a ‘slice’?</DIV>
<DIV> </DIV>
<DIV>You can use K.I.S.S. Konsole to view the raw I&Q samples from the
ANAN-10 if you have that requirement.</DIV>
<DIV> </DIV>
<DIV>if you use a signal generator to calibrate the display you will find it is
not frequency dependant. </DIV>
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<DIV>73 Phil...VK6PH </DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=brian@lloyd.com
href="mailto:brian@lloyd.com">Brian Lloyd</A> </DIV>
<DIV><B>Sent:</B> Sunday, February 23, 2014 3:05 AM</DIV>
<DIV><B>To:</B> <A title=hpsdr@lists.openhpsdr.org
href="mailto:hpsdr@lists.openhpsdr.org">hpsdr@lists.openhpsdr.org</A> </DIV>
<DIV><B>Subject:</B> [hpsdr] Meaning of ADC-L and ADC-R metering in
PowerSDR</DIV></DIV></DIV>
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<DIV
style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>*****
High Performance Software Defined Radio Discussion List *****<BR><BR>
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<DIV dir=ltr>Today I was using my ANAN-10 to get an idea of the total power
coming in from my Pixelsat loop. This is a broad-band untuned loop with a
preamp, good pretty much from DC to 30MHz. (Really it is useful from about 50kHz
to 20MHz but it does have significant output above and below that range.) My
assumption was ADC-L and ADC-R represented the actual ADC values relative to
full-scale, based on the fact that PowerSDR labels the value in dBFS (decibels
relative to full-scale).
<DIV> </DIV>
<DIV>You can imagine my surprise when I discovered that this value changed as I
"tuned" the radio. (Yes I did check the attenuator and made sure it was set to
0dB for these tests.) Now my supposition is that what ADC-L and ADC-R are
reporting are the values of the samples in a given RX "slice" rather than the
actual ADC values. If this is the case, perhaps a new label is in order in
PowerSDR? May I suggest, "Not Very Useful - L" and "Not Very Useful - R". Or
perhaps, "Slice - I" and "Slice - Q". </DIV>
<DIV> </DIV>
<DIV>But a reading of how close the input is to saturating the ADC(s) would be
very useful.<BR clear=all>
<DIV> </DIV>-- <BR>
<DIV dir=ltr>Brian Lloyd, WB6RQN/J79BPL <IMG
src="http://www.catb.org/hacker-emblem/glider.png"><BR>706 Flightline
Drive<BR>Spring Branch, TX 78070<BR><A href="mailto:brian@lloyd.com"
target=_blank>brian@lloyd.com</A><BR><SPAN><SPAN id=gc-number-66
title="Call with Google Voice"
class=gc-cs-link>+1.916.877.5067</SPAN></SPAN></DIV></DIV></DIV>
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