Hello Job,
TotalPower is designed to work only with rtl-sdr as of now.
Maybe later on I will consider to extend to other SDR if I will see interest.
Thanks for using Total Power !
Mario
From: sara...@googlegroups.com <sara...@googlegroups.com> On Behalf Of Job Geheniau
Sent: domenica 25 aprile 2021 18:42
To: Society of Amateur Radio Astronomers <sara...@googlegroups.com>
Subject: [SARA] Airspy mini & RTLSDR splitter
Hi Community,
Short question, is this allowed and possible (besides I guess 3 dB loss)?
Because I can use airspy mini with sdr# and rtl with Virgo.
But Total Power seems not to work....
Job Geheniau
Job
It looks like the rtl-sdr is not installed properly. When it is, the manufacturer and product will read Realtek and RTL2838UHIDIR respectively (next to the Check RTL-SDR button).
Jonathan
From: sara...@googlegroups.com <sara...@googlegroups.com> On Behalf Of Job Geheniau
Sent: Sunday, April 25, 2021 11:42 AM
To: Society of Amateur Radio Astronomers <sara...@googlegroups.com>
Subject: [SARA] Airspy mini & RTLSDR splitter
Hi Community,
Short question, is this allowed and possible (besides I guess 3 dB loss)?
Because I can use airspy mini with sdr# and rtl with Virgo.
But Total Power seems not to work....
Job Geheniau
Yes Jonathan you are right and sorry I missed this on the previous message.
This is something that happened to some other user. I will incorporate e detailed troubleshooting procedure in the next release of TotalPower.
Job , in the meantime, please have a look to this SignalsEverywhere YouTube video https://www.rtl-sdr.com/signalseverywhere-windows-10-usb_open_error-12-fix/
and I am pretty confident that you will be able to fix the problem !
Mario
To view this discussion on the web visit https://groups.google.com/d/msgid/sara-list/029801d739fd%241c2a1cb0%24547e5610%24%40gmail.com.
hmm weird, maybe its the splitter, because the RTL works perfect with sdr# and virgo for almost 2 years now....so its installed properly
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On Apr 26, 2021, at 12:35 PM, Paul Oxley <oxl...@att.net> wrote:
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What sort of setup would be needed to reproduce the work on an amateur, open, level?
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(A) First of course, an A/D and digital processing sufficient to look at raw A/D output (ideally) and simultaneously, to do a power spectral density FFT on the output. (Bin widths several times less than notch width)
(B) A noise source of sufficient power to overdrive the A/D after the loss of fixed pads and filters. The critical characteristic here is, of course, end to end flatness over the A/D capability and reasonably high crest factor? Moderate ripple is ok as long as the end to end flatness averages out. A “good” noise source is inherently flat, but in the SARA environment, hay I suggest a string of “wide band 20-30 dB amplifiers, in series, starting with a terminated output. The last stage must have sufficient head room to achieve the desired “crest factor”.
(C) Noise bandwidth filter (Band pass) covering the significant frequency range of the A/D, well down at the Nyquist frequencies. This is used to define in input noise level predictably.
(D) The hard part: A very deep notch filter (Band Stop) , in band of the Noise Bandwidth filter, preferably between ½ and 2/3 Nyquist. As narrow and as deep as money/design expertise can get. As narrow as possible so that the noise power it stops is not a significant part of total band limited noise, but again “as money/design expertise can get”. The depth of the notch should significantly exceed the NPR that the A/D should be capable of achieving based on sample bits.
(E) The easy part, a variable step attenuator.
You can split the band limited, notched, attenuated noise prior to the A/D, in order to measure applied power but that measaurement is not needed or at all that useful in this context of an PTIC vs NPR analysis.
Lester B Veenstra K1YCM MØYCM W8YCM 6Y6Y
452 Stable Ln (HC84 RFD USPS Mail)
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-----Original Message-----
From: sara...@googlegroups.com [mailto:sara...@googlegroups.com] On Behalf Of Lamar Owen
Sent: Friday, April 30, 2021 4:53 PM
To: sara...@googlegroups.com
Subject: Re: [SARA] Airspy mini & RTLSDR splitter
So, I've snipped just a bit here. I am always willing to learn new
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starting with a terminated input (vice output)
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