Hi Louie! I'm studying HackRF's schematic as well. I'm not quite sure if you got the connections right. Pin32 (RSSI) of the MAX2837 seems to be connected directly to Pin2 (ADC0_1/ADC1_1) of the LPC4320 processor. According to the 2837 spec sheet, the RSSI is an analog signal ranging from 0.4 to 2.2V with a slope of 30mV per dB. The analog signal is likely digitised by the 4320 processor to give a digital value. I'm not quite sure if anything on the schematic suggests a connection with the CPLD/headers. Not sure if I missed out anything. Might be tricky to breakout that pin.
Ben > From: [email protected] > Subject: HackRF-dev Digest, Vol 44, Issue 2 > To: [email protected] > Date: Fri, 3 Jun 2016 01:29:35 -0400 > > Send HackRF-dev mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > https://pairlist9.pair.net/mailman/listinfo/hackrf-dev > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of HackRF-dev digest..." > > > Today's Topics: > > 1. SDR# (i2NDT) > 2. Re: SDR# (Micha? Byrecki) > 3. obtaining RSSI from max2837 (Louie lu) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 2 Jun 2016 11:29:04 +0000 (UTC) > From: i2NDT <[email protected]> > To: "[email protected]" > <[email protected]> > Subject: [Hackrf-dev] SDR# > Message-ID: > <[email protected]> > Content-Type: text/plain; charset="utf-8" > > hi!I am waiting for my HackRF One to be delivered next week and, in meantime, > I need to choose a software for it!I am familiar with SDR# (and windozzz > other sdr programs...) and wonder if I can also transmit with it.by the way, > at the moment,? I need only to generate a "continuos wave" RF signal without > modulation. > thanks in advance > best 73 > dei2NDT Claudio? > > ?i2NDT's Web Site?i2NDT's Grabber CompendiumIcom IC pcr-1000 > BigArgo V1.134 > Locator JN45tq > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <https://pairlist9.pair.net/pipermail/hackrf-dev/attachments/20160602/09ad6f14/attachment-0001.html> > > ------------------------------ > > Message: 2 > Date: Thu, 02 Jun 2016 14:13:32 +0200 > From: Micha? Byrecki <[email protected]> > To: "[email protected]" > <[email protected]> > Subject: Re: [Hackrf-dev] SDR# > Message-ID: <[email protected]> > Content-Type: text/plain; charset="utf-8" > > Howdy Claudio, > > If You want to go beyond widely used windows software like SDR# I'd > suggest You to get in cope with GNU Radio Companion (aka grc). It's a > GUI for interfacing DSP modules. Getting started reqires some time to > familiarize with digital signal processing rules (like complex/float > math, some sampling princples), but allows You to do a really nifty > tricks with not only SDR radios, but the signals processing in general. > > You may go visit HackRF website and check out Mike's tutorials. There is > also a worthy set of videos by Balint Sebeer on YT: > https://www.youtube.com/watch?v=N9SLAnGlGQs > that really goes into details. > > Regarding to the transmission - I've always been keen on receiving, so I > cannot tell You much. Except, the HackRF circuit does not incorporate RF > band-pass filters (no anti-aliasing mechanisms) and it may spoil Your > transmitting signal with harmonics and other nasty things. > > Cheers, > Mike SP5BYK > > > Dnia 2016-06-02, czw o godzinie 11:29 +0000, i2NDT via HackRF-dev pisze: > > hi! > > I am waiting for my HackRF One to be delivered next week and, in > > meantime, I need to choose a software for it! > > I am familiar with SDR# (and windozzz other sdr programs...) and > > wonder if I can also transmit with it. > > by the way, at the moment, I need only to generate a "continuos wave" > > RF signal without modulation. > > > > > > thanks in advance > > > > > > best 73 > > > > de > > i2NDT Claudio > > > > > > > > > > i2NDT's Web Site > > i2NDT's Grabber Compendium > > Icom IC pcr-1000 > > BigArgo V1.134 > > Locator JN45tq > > > > _______________________________________________ > > HackRF-dev mailing list > > [email protected] > > https://pairlist9.pair.net/mailman/listinfo/hackrf-dev > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <https://pairlist9.pair.net/pipermail/hackrf-dev/attachments/20160602/fdceedf2/attachment-0001.html> > > ------------------------------ > > Message: 3 > Date: Thu, 2 Jun 2016 14:34:23 +0000 > From: Louie lu <[email protected]> > To: "[email protected]" > <[email protected]> > Subject: [Hackrf-dev] obtaining RSSI from max2837 > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > Hi guys, > I am trying to get RSSI measurement/value from max2837 on hackrf one board. > After reading max2837 programming guide, I know how to enable RSSI > measurement. But after that, I am not what I got is correct RSSI measurement. > I am just wondering if there is any one here who successfully got RSSI value > from max2837 on hackrf one. > Since I started this task, I have ran into following problems > 1/ identifying RSSI pinWell, I can see the max2837 pin 32 is the RSSI output > pin, But, where does it lead to? Looking at pcb schematic pdf file, it seems > like this "RSSI pin32 (max2837) ---> P67/SGPIO12 (LPC4320) ---> Bank2F3M12 ( > CPLD)". I am not sure if this is correct? > 2/ If I am correct above, How to get RSSI value?Since RSSI pin 32 output > signal is analog signal (I could be wrong here), How do I get voltage of pin > 32 output signal via SGPIO12? I tried to connect oscilloscope to Bank2F3M12 > PIN 21 on P28 but what display on the screen does not make any sense to me. > Can anyone here help? > > Cheers,Louie > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <https://pairlist9.pair.net/pipermail/hackrf-dev/attachments/20160602/46ff5c80/attachment-0001.html> > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > HackRF-dev mailing list > [email protected] > https://pairlist9.pair.net/mailman/listinfo/hackrf-dev > > > ------------------------------ > > End of HackRF-dev Digest, Vol 44, Issue 2 > *****************************************
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