Re: [Hackrf-dev] Still hoping for PTT
Agreed, But assuming the hw model could be disabled by a little switch you won't need any software change at all and retain bias ability for rx only applications. If using software is that easy, then there should be no problem to activate bias and tx function at the same time. I guess that not all the programs able to tx are able to do it, hence the idea to link the two together at hw level, but maybe I didn't get the whole picture. Still today is not clear to me how to drive in tx the hackrf looking at gnuradio example diagrams, go figure if I know how to sync the bias at the same time. On June 27, 2018 9:25:36 PM GMT+02:00, Chuck McManis wrote: >It is a bit more complicated Giuseppe than that. You see there are >systems >which have active antennas (powered) for receiving. In such a system >you >can use the antenna bias to provide power to the active antenna >elements >(typically a filter bank and an LNA). Those are typically receive only >systems. Systems that have a dedicated transmit port can "hard code" >the >bias-T on that port and switch on or off bias on the receive port. But >if >you only have one port there are times when you want the bias on all >the >time (operations with an active antenna) and times when you want it >only >during transmit (PTT / bias-t applications). A software option that >lets >you choose how it behaves is the best overall solution. > >--Chuck > >On Wed, Jun 27, 2018 at 3:13 AM Giuseppe Marullo >wrote: > >> > Or to put it differently, :-) If the HackRF would enable the ANT >bias >> > when it was transmitting then it would "just work" as they say. >> Definitely I would vote for this. Maybe we could "link" the TX LED >> signal with the BIAS using a little hw "bridge" so not to rely on any >> sw change. >> >> Giuseppe Marullo >> IW2JWW - JN45RQ >> ___ >> HackRF-dev mailing list >> HackRF-dev@greatscottgadgets.com >> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev >> -- Sent from my Android device with K-9 Mail. Please excuse my brevity.___ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
Re: [Hackrf-dev] Still hoping for PTT
> Or to put it differently, :-) If the HackRF would enable the ANT bias > when it was transmitting then it would "just work" as they say. Definitely I would vote for this. Maybe we could "link" the TX LED signal with the BIAS using a little hw "bridge" so not to rely on any sw change. Giuseppe Marullo IW2JWW - JN45RQ ___ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
Re: [Hackrf-dev] HackRF-dev Digest, Vol 70, Issue 9
Ok, >There is an android app called rf analyzer that will control a hackrf. William, tanks for the suggestion. I just purchased the RfAnalyzer, it seems to work on the S7. I was fearing no demodulation(just an analyzer?) but it works, tested on a couple of repeaters and FM radio. >I have used this app on an sg3 with >the after market heavy duty battery. What did you use to inject power? Is there anything readily available? I hate to mess with USB connector, probably the most unfriendly connector for DIYers ever. >The SdrTouch app might also work. SdrTouch afaik does not support the hackrf. In any case I am thinking to add a vanilla SDR stick to get full duplex/double reception, and maybe easier reception with RPI for stuff like DAB and ADS-B(not clear to me how difficult is to receive them with a HackRf). Thanks! Giuseppe Marullo IW2JWW - JN45RQ ___ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
Re: [Hackrf-dev] advice on a txco to buy?
Ok, found: http://www.nooelec.com/store/tiny-tcxo.html 20USD and will fit inside the enclosure. Now I need to fix the broken PA. Component is obsolete and I ordered 3 from a UK seller. The switches are only available in China for low qty , any recommendation for a trusted source? Giuseppe Marullo IW2JWW - JN45RQ ___ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
Re: [Hackrf-dev] advice on a txco to buy?
I was needing (and still searching) for a txco for the HackRf but I would like something internal to the box, not sure about what is sold on Ebay. Anyone could recommend something that surely would fit inside the Standard enclosure? Anyway if you really want to address the problem, spend a little more and use something like this one: https://www.ebay.it/itm/Trimble-GPS-Receiver-GPSDO-10MHz-1PPS-GPS-Disciplined-Clock-sine-and-square-wave/252162780444?hash=item3ab612ad1c:g:PqcAAOSww-Baabwy It is a second hand trimble gpsdo module, enclosed with a aluminum box, add this antenna: https://www.ebay.it/itm/Maxrad-GPS-TMG-26N-26db-gps-timing-antenna-antenne-N-female/232793495105?hash=item363392d641:g:XOgAAOSw5VFWMReh and you could have like 10ppt (parts per trillion) accuracy if you keep it powered on for several days. Most important part is that it self checks accuracy, and depending on the module inside (at the moment trimble not Symmetricom beware) you should be able to use Lady Heater (http://www.ke5fx.com/heather/readme.htm). Another alternative is QRPLabs: https://qrp-labs.com/progrock.html plus https://qrp-labs.com/qlg1.html cheaper but in kit and without enclosures. I have both, and generally they are very good for the price. QRPLabs is off by like 2Hz@10MHz, didn't have the time to investigate why. Subscribe to time nuts mailing list if you want to know more (*much* more, possibly even too much) about timing: www.leapsecond.com Cheers! Giuseppe Marullo IW2JWW - JN45RQ On 06/13/2018 11:06 PM, Chuck McManis wrote: Orrin, I expect that if you continue in your journey in software radio you will find that a solid 10Mhz reference to be a good thing to have in general. (which you can use to drive the HackRF). I ended up getting an RF signal generator from Crowd Supply (https://www.crowdsupply.com/era-instruments/erasynth) which works really well for this and I can use it with all of my SDRs in addtiion to the HackRF. A friend of mine recommended this one (https://www.tindie.com/products/AnalysIR/10mhz-ocxo-frequency-standard-module-or-kit/) which is basically $77 when you get all the parts and it is assembled) so lower cost but equally movable from SDR to SDR. Cheers, --Chuck On Tue, Jun 12, 2018 at 3:33 PM, Orrin Winton <mailto:orrin.win...@gmail.com>> wrote: Hello folks, have had my HackRF for about a week and am going thru Michael's tutorials & other tutorials. Love this device. Are the eBay items described as "New External TCXO clock PPM 0.1 for HackRF One GPS Applications GSM/WCDMA/LTE" for $10-12 the appropriate part to buy? (noob here) Or can some similar item be bought that has SMA jacks on it and can be connected via cable to the jack on the rear of the HackRF? The $10 clock looks like it'll require leaving the top half of the case off, is why i ask. At 434 MHz doing hackrf_transfer i'm getting 700 to 1000 hz drift (downwards in freq) on a replayed CW signal, in ten minutes, which (if i'm calculating this correctly) is 1.6 to 2.3 ppm. I'm being careful to use the correct antenna on the HackRF, keep gains low, and use low xmit power (2W) on my amateur transceiver across the room (to record an rf_transfer). Possibly i should put an attenuator on the 2W radio. Thanks for comments. Orrin in NE Calif. ___ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com <mailto:HackRF-dev@greatscottgadgets.com> https://pairlist9.pair.net/mailman/listinfo/hackrf-dev <https://pairlist9.pair.net/mailman/listinfo/hackrf-dev> ___ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com https://pairlist9.pair.net/mailman/listinfo/hackrf-dev ___ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
[Hackrf-dev] HackRf+ArrowII antenna portable Satellite RX set
Hello, just wondering if I could use a Samsung S7 to use the hackrf with satellites. It is not clear to me which Android app could be used with hackrf for simple FM receive. Do I need drivers? No Tx, no doppler correction no automagic frequency set, just plain rx. TIA. Giuseppe Marullo IW2JWW - JN45RQ ___ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
Re: [Hackrf-dev] Rf amplifier not working
Hello Mitja and Michael, I knew the link, but my problem is that at the moment I could only use Windows (*long* story, I selected a AMD R9 280 to play with ESX/DirectPath I/O and linux support for AMD R9 sux), so my option to understand the problem is tied to use SDR Console by sdr Radio and SDR Angel. I don't know how to "map" rf amp to rx/tx gadgets on the gui. On SDR Console 2.3 (used for Rx only), I have the following controls: LNA (0-40dB, defaults to 24dB) VGA (0-62 dB defaults to 20dB) Ext Amp (off/On defaults to Off) Listening to FM broadcast radios, it works if I keep Ext Amp off (it should be used only in TX, right?). Changing LNA and/or VGA increase/decrease the received signal and this is fine. Which is the supposed behavior when I switch Ext Amp on during RECEPTION? Is it okay that received signal weakens almost to vanish? I ask this because I would expect no impact since the PA should not be activated on reception, or am I wrong? On SDR Angel(used for RX AND TX), same controls and same result on Rx. When I try to transmit I have a signal, but if I engage the ext amp almost nothing comes out. I use a dualband/DMR handheld almost one meter near the HackRF antenna. I am asking because I would like to know if I need to change just the PA or also the rf switch are involved. I would order a couple of them (two amps and two switches) but it seems that the switches are way nastier than the amplifiers to solder so I would know for sure if the behavior is related to just the PA being broken or worse. I fried mine probably using a 1.2m 5/8 mobile antenna too near to the DMR handheld to receive DMR transmissions. >By the way, your mail client has done an unneighborly thing in designating your >email as multipart/alternative with an empty text/plain section. In some mail >clients (and probably the mailing list digest) this makes the body of your >message appear empty Interesting reading: https://stackoverflow.com/questions/8320141/multipart-alternative-subtype-when-client-use-it Usually I send out messages using Automatic format and my email client is Thunderbird. This is the first time I get problems using it. If you don't mind could I send to you a couple of test messages, one encoded in text only and the other in auto to see what you do receive. BTW, which email client are you using? I am not a fan of HTML messages, I do rather prefer old plain text, and my impression was that it was what I was going to send using Auto on a new (blank message), more than willing to keep text only as default(and not a double whatever format), thank you. Giuseppe Marullo IW2JWW - JN45RQ ps: this answer is plain text only, hopefully it will be okay ___ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
