Johan, the Perseus master clock is simply a crystal oscillator with a 20 ppm stability in the -40/+70 Celsius degree temperature range. No means is provided to...
... Originally I planned to disconnect the internal 80 MHz oscillator and provide an external LO, synthesized from my 10 MHz station reference (Rb, Efratom...
Thanks for the information Nico & Marco. That oscillator is surely good enough for 99.9% of all applications! My reason for asking is that am a little bit...
Hi Rob, the "CAL" button is in the tuning panel on left the screen Tune a signal at 9996000 or 4996000 in CW and press CAL. Now Perseus is calibrated. 73 Beppe...
... receivers is the source of high spurious signals since even the best wideband amplifiers can't provide the required 110/115 dB HD suppression. Would it be...
... Or 10 MHz, or 5 MHz, and so on. Procedure: [Cal] and [Center] must be ON, [Cal Clr] OFF. Mode CW. Tune the reference signal for exact center. By instance,...
... Hi Guido, I think that this sentence relates to the aliasing responses of the A/D. Harmonics are generated in the analogic frontend (mainly in the ...
... of the ... spurious ... that ... Nonlinearities of an amplifier can be corrected this way if they can be modeled/measured and are stable over time,...
Hallo - there have been some questions on the frequency stability of Perseus. Nico had answered them from his view of the designer. I would like to drop...
Hallo - it was fun like "A Day at the Races" (Marx Brothers, 1937), my "Day in the 60 meter band". It resulted in an easily-to-handle 241 GB file, which took...
Nils, thanks for the notes and the links you provided. I've checked right now OK0EU QRP beacons in the 80 m band and they are perfectly received here, even...
Looks perfectly, Nico! And even the interruptions for the CW ID are clearly visible. The task of this beacon net is to provide a means of earthquake forecast....
I've checked right now OK0EU QRP beacons in the 80 m band and they are perfectly received here, even with the not very good 40 m vertical antenna I have here...
… fine, Alberto! Most important for these receptions is the frequency stability of Perseus over one to two hours (whereas an initial error can be cleared ...
Nico and the group - I am trying to use Perseus for various digital modes, e.g. STANAG, HFFAX, etc. I am getting less than optimal results. I have run ...
One more note - I also tried connecting Perseus directly to the laptop Vs through a USB hub - no difference in results. I thought the problems could have been...
I use a Perseus and SeaTTY - no VAC, no sounds card of any sort, and get fine results with both HF Fax and Navtex. It's on a 3Ghz Dell 4700 and I frequently...
Hi, Mike - antenna is a Windom, 42 m long, eight meters high. Not stretched like a dipol, but more than a corner-dipole. Thus it should provide more or less...
David - I tried Perseus with several 3rd party decoding and analyzing software, among them: * MSCanmeteo * SykSweep 5 * MixW2 * HFDL (worked even decoding...
Hi Nils, ... You can use Linrad for this. Make a .WAV file with Perseus at the lowest possible sampling rate that allows all the signal or at a high sampling...
Thanks, Leif, for your hint. For my purpose, I often am just satisfied with a realtime software like SBSPectrum or SpectraPlus 5.0. But you software ist...
Hallo, everyone - it's hard to show the stunning performance of Perseus just on the test bench with two HP-synthesizer meeting at its antenna socket ... Hic...
Good morning from Germany - as there has been discussed the frequency stability of Perseus, last night I took a recording of OK0EU beacon at 3594,5 kHz. The...
Hi Niels, very nice, very interesting picture. What program(s) have you used to plot the graph? At the moment (ince yesterday evening) my Perseus is monitoring...
Hi, Marco - the programme is SBSpectrum by G3PLX, and you will only get it from him directly. If you need his mailing adress, just drop me a line. Well, the...
When using the Perseus receiver with HF Fax Decoders like i.e. the popular JVComm32 of Eberhard Backeshoffor, DK8JV, or the CombiTech Mscan Meteo some care...
I have restarted my former SDR-1000 blog and it now focuses on Perseus, which is my main receiver now. If you wish to follow my discoveries and comments,...
