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Quisk and HPDSR with multiband

Mario Roessler, DH5YM All Messages By This Member #2660 Hi all, does anybody of you have experience with HPSDR and multiband operation in Quisk? Specifically i am looking for information how good reception of different bands in parallel is working. I want to use a TRX-DUO with hpsdr compatible firmware and Quisk plus some external converters to do QO-100 fullduplex (TX on one band and simultaneous RX on the other band) as well as using it with microwave transverters. Any information about if my use-case could work is welcome. regards Mario, DH5YM
Peter Ide-Kostic All Messages By This Member #2661 Hello Mario, The reception quality of Quisk is great of course, and you can run as many instances of Quisk as you want, as I have done it successfully. Though for receiving all HF bands? at the same time, typically to monitor FT8 traffic with a single? multiband antenna, I personally find Sparksdr more practical because you only need to run 1 instance of the program (similar? reception quality than Quisk). My favorite program for voice is Quisk though.? The TRX duo is HPSDR compliant not Hermes light compliant. Quisk is not by default HPSDR compliant, it is hermes light compliant which is almost the same but not totally.... Practically, it means that the way to switch bands by default? is different than for PowerSdr,? Linhpsdr and Thetis which are HPSDR compliant (not hermes light compliant) . So a multiband low pass or bandpass? pass? filter designed to work for PowerSDR or LinHPSDR or Thetis? may not "automatically work " with QUISK (this was my experience). Last time,? I checked this, about two years ago,? it required to adapt some band switching? parameters in Quisk to make Quisk band switching work in an HPSDR way. I don't remember how it goes with Sparksdr but it is also hermes light compliant I think.? Good luck with your project? Regards? Peter toggle quoted message Show quoted text Le dim. 29 janv. 2023, 04:21, Mario Roessler, DH5YM <Mario.dh5ym@...> a écrit?: Hi all, does anybody of you have experience with HPSDR and multiband operation in Quisk? Specifically i am looking for information how good reception of different bands in parallel is working. I want to use a TRX-DUO with hpsdr compatible firmware and Quisk plus some external converters to do QO-100 fullduplex (TX on one band and simultaneous RX on the other band) as well as using it with microwave transverters. Any information about if my use-case could work is welcome. regards Mario, DH5YM
roschi_ch All Messages By This Member #2662 Hi Mario, I used Quisk following a 144MHz Transverter for contesting which has 2 outputs: a) 14 -? 14.5 MHz broadband and b) 9MHz narrowband fixed IF provides by an additional up/down converter and Xtal Filter. This is a kind of multiband operation. Normal RX and TX was via 9 MHz IF to provide max. dynamic range and a clean TX Signal. The 14 MHz broadband path is used for the spectrum scope and sometimes to monitor a particular frequency. This worked very well provided that the gains of both paths were adjusted to avoid overload. All the frequency settings were programmed in the Quisk hardware file. I have a TRX-Duo here and tested it: beware, that the TX signal is not very clean due to the PLL provided clock of the DAC but also on board SMPS noise and spuirs which I suspect to be cross-talk inside the FPGA (). Should be no issue for QRP though. 73, Yves
roschi_ch All Messages By This Member #2663 Hi, my reply above regarding TRX-DUO lacks some explanation: the measurements in the linked issues is for a Stemlab 16-122 SDR. The values for the TRX-DUO are similar though. The TX sideband noise of the TRX-DUO is a bit worse due to the better clock oscillator of the Stemlab 16-122 SDR. I don't have my measurements at hand, the may even be lost. 73 de Yves, hb9ewy

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