- osmocom-sdr - lists.osmocom.org

Re: Osmo-FL2K stops transmitting randomly
by Sajjad Golchin poor 16 Jun '18

16 Jun '18

Hi Marcus and thanks for your reply. >Your video is about 13 minutes longer than I'd like – can you pinpoint >at which time in that video your transmission stops? You can watch this video between 7:00 & 8:00 to observe the breakdowns. >As usual, debugging on the side of the observing party might very well >be helpful here. Figure out whether the program halts (a software >debugger, e.g. gdb, would be the appropriate tool), the USB transfers >stop (wireshark might be helpful here), or whether just something >happens inside the device while the computer and software happily >continue to work. Observing the spectrum might help. You just gave me a good point to start debugging this issue! Actually I don’t have a RTL-SDR or anything else in hand right now to observe the spectrum but I will do the tests soon. -------------------------------------------- Hi Steve, did a great job! >This will happen if the host cannot supply enough data to the device, >you need to use a lower sample rate in this case, or get rid of >a hypervisor like VMware, as is the case in this video. I tried fl2k_fm both in VMWare and in GNU radio live image booted from a flash drive and in both I had the problem. and why should I use a lower sample rate when my system can handle the samples well? (take a look at attachments) I’m using VMWare Workstation Pro (Version: 14.1.2 build-8497320) on a brand new ACER laptop (Model: Aspire A715-71G-71Y3) running Windows 10 Pro 1803 (Build: 17134.112) with 16 gigabyte RAM and an Intel Core i7 7700HQ CPU. The USB host controller is Intel(R) USB 3.0 eXtensible Host Controller - 1.0 (Microsoft) witch I believe it can handle up to 157 MS/s. all drivers are updated. However, I didn’t see anything wrong with virtualization except that the maximum achievable sample rate was a little lower than the GNU radio live booted from flash drive. Except for this, I didn't encounter by anything. >There seems to be a 'frame loss' mechanism to detect this in through an >interrupt transfer, but I haven't implemented this yet and have no idea >if this works with disabled synchronization. Looking forward to the results! And don’t mind asking me for a helping hand. I’ll do my best to help this project. I was reading the comments below this post in rtl-sdr.com blog and I saw a user who had the same issue mentioned something that might be useful: Of futher note (hopefully someone from osmocom will see this) the bug where the broadcast intermittently ceases in fl2k_fm under both an ubuntu virtual machine and directly ran as a windows exe seems to have something to do with cpu affinity and / or process priority – generally it starts spitting out the underflow message on stdout then the signal drops out and the process requires a restart. Regards, Sajjad

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Lists page cert expired
by tom＠tswartz.net 14 Jun '18

14 Jun '18

Hey all: Just a heads up, the certificate on the mailing list site has expired. It expired two days ago, 12 June 2018. Since it's signed by Lets Encrypt, shouldn't be too hard to update, but you might want to do that ;) Cheers, -- Tom Swartz

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question!
by Cattalina Maria 14 Jun '18

14 Jun '18

Hello. I have some problems.I want to create a GSM network for my final diploma project for University.I'm using USRP2 and I haven't find any specific configuration files for this type of USRP.Do you have any configuration files for USRP2? I'm running Kali Linux (amd64). I've attached the config files that I've used from osmocom.org and some printscreens.Sorry for my English.I'm looking forward for your response.Thank you!

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Osmo-FL2K stops transmitting randomly
by Sajjad Golchin poor 13 Jun '18

13 Jun '18

Hi all, as some of you know Osmo-fl2k has a bothersome software issue that sometimes just stop transmitting without any good reason. in my case when I was transmitting WBFM sometimes it may stop transmitting. I mean the RF output will be interrupted completely without any error or warnings on screen and I should re-execute the commands to transmit again and this goes on and on. sometimes it may work without any issues for like 10 min and sometimes it may fail after just a few seconds. the problem also appeared in executing <fl2k_file> when I was transmitting DVB-T. you can watch this video to gain a better understanding: https://www.youtube.com/watch?v=G0tjzPHFFA8 I have no idea if this issue been discussed earlier in the mailing list or not, anyway I didn't find anything useful by Googling.your comments and suggestions are greatly appreciated. Regards,Sajjad

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Osmo-fl2k
by Fred Neich 09 Jun '18

09 Jun '18

Hello, I have a question about osmo-fl2k, the generated binary file using the fl2k grc transmission flow graphs, contains the carrier frequency, the fl2k_file stream the file to the device, so how the device can transmit these data in that frequency. I mean how it recognize the frequency to transmit on. Thank you.

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fl2k - low samplerate/ no rf-output
by R B 04 Jun '18

04 Jun '18

Hello Gang ;) i have some troubles, properly "misusing" my vga-adapter. the samplerate while testing with fl2k_test is pretty low (~50MS/s) and i am not sure if this is some hardware issue or. RF-Output isn´t detectable either. i am using a lenovo thinkpad x1 hybrid (1294). any help is appreciated. $ fl2k_test -s 162e6 Reporting PPM error measurement every 10 seconds... Press ^C after a few minutes. real sample rate: 52862885 current PPM: -673686 cumulative PPM: -673686 real sample rate: 52973828 current PPM: -673001 cumulative PPM: -673342 real sample rate: 53014975 current PPM: -672747 cumulative PPM: -673143 real sample rate: 52979890 current PPM: -672964 cumulative PPM: -673098 ^CSignal caught, exiting! $ fl2k_test -s 51e6 Reporting PPM error measurement every 10 seconds... Press ^C after a few minutes. real sample rate: 51037366 current PPM: 733 cumulative PPM: 733 real sample rate: 51031823 current PPM: 624 cumulative PPM: 678 real sample rate: 51025418 current PPM: 498 cumulative PPM: 617 real sample rate: 51023557 current PPM: 462 cumulative PPM: 578 real sample rate: 51019821 current PPM: 389 cumulative PPM: 540 real sample rate: 51017641 current PPM: 346 cumulative PPM: 507 ^CSignal caught, exiting! $ sudo lspci -vv|grep "USB 3" -A 200 0f:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 04) (prog-if 30 [XHCI]) Subsystem: Lenovo uPD720200 USB 3.0 Host Controller Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 18 Region 0: Memory at f1400000 (64-bit, non-prefetchable) [size=8K] Capabilities: [50] Power Management version 3 Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME- Capabilities: [70] MSI: Enable- Count=1/8 Maskable- 64bit+ Address: 0000000000000000 Data: 0000 Capabilities: [90] MSI-X: Enable+ Count=8 Masked- Vector table: BAR=0 offset=00001000 PBA: BAR=0 offset=00001080 Capabilities: [a0] Express (v2) Endpoint, MSI 00 DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s unlimited, L1 unlimited ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported- RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+ MaxPayload 128 bytes, MaxReadReq 512 bytes DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr+ TransPend- LnkCap: Port #0, Speed 5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s <4us, L1 unlimited ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp- LnkCtl: ASPM L1 Enabled; RCB 64 bytes Disabled- CommClk+ ExtSynch- ClockPM+ AutWidDis- BWInt- AutBWInt- LnkSta: Speed 5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- DevCap2: Completion Timeout: Not Supported, TimeoutDis+, LTR+, OBFF Not Supported DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled LnkCtl2: Target Link Speed: 5GT/s, EnterCompliance- SpeedDis- Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS- Compliance De-emphasis: -6dB LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete-, EqualizationPhase1- EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest- Capabilities: [100 v1] Advanced Error Reporting UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol- UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol- CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr- CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+ AERCap: First Error Pointer: 00, GenCap- CGenEn- ChkCap- ChkEn- Capabilities: [140 v1] Device Serial Number ff-ff-ff-ff-ff-ff-ff-ff Capabilities: [150 v1] Latency Tolerance Reporting Max snoop latency: 0ns Max no snoop latency: 0ns Kernel driver in use: xhci_hcd $ lsusb Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 004 Device 002: ID 1d5c:2000 Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub $ usb-devices |grep "Bus=04 Lev=01" -A 100 T: Bus=04 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 3 Spd=5000 MxCh= 0 D: Ver= 3.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS= 9 #Cfgs= 1 P: Vendor=1d5c ProdID=2000 Rev=02.00 C: #Ifs= 3 Cfg#= 1 Atr=80 MxPwr=496mA I: If#= 0 Alt= 0 #EPs= 0 Cls=10() Sub=00 Prot=00 Driver=(none) I: If#= 1 Alt= 0 #EPs= 2 Cls=10() Sub=02 Prot=00 Driver=(none) I: If#= 2 Alt= 0 #EPs= 1 Cls=10() Sub=02 Prot=00 Driver=(none) $ lsmod|grep usb $ lsmod|grep xhci thank you and cheers robin

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fl2k_* have libusb: error [op_dev_mem_alloc] alloc dev mem failed errno 12
by Ignatius Rivaldi 03 Jun '18

03 Jun '18

Hi, I've compiled osmo-fl2k with libusb-1.0.22-1 and this happens when I tried to start fl2k_test: feanor@silmaril ~> fl2k_test -s 162e6 Using 6 zero-copy buffers libusb: error [op_dev_mem_alloc] alloc dev mem failed errno 12 Failed to allocate zero-copy buffer for transfer 4 Reporting PPM error measurement every 10 seconds... Press ^C after a few minutes. real sample rate: 15372775 current PPM: -905106 cumulative PPM: -905106 then when I try to connect red and ground output to oscilloscope, there is no output at all, even if I use fl2k_fm

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Tagging new versions of rtl-sdr and osmo-fl2k
by Harald Welte 03 Jun '18

03 Jun '18

Hi! Today I've added rtl-sdr and osmo-fl2k to the automatic nightly package builds at https://build.opensuse.org/project/monitor/network:osmocom:nightly I also wanted to add them to the "latest" feeds (which build that latest tagged version, as opposed to a nightly snapshot). However, for this to work we need tagged versions that include the "debian" sub-directory in the respective projects. I hence temporarily disabled the "latest" builds until that happens, see https://build.opensuse.org/project/monitor/network:osmocom:nightly Please let me know once new versions are tagged and the above patch can be reverted. Thanks! -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

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Request for help with MxL608 tuner driver (Tzumi MagicTV etc)
by James Dallas 29 May '18

29 May '18

Hi everyone, There has been a considerable discussion in the past couple of days about a device called the Tzumi MagicTV. This is an Atheros-chipset OpenWRT device connected to an RTL2832P, which seems to be used as a bridge/DAC for a MaxLinear MxL608 tuner and a Panasonic ATSC demodulator. The device is sold at Wal-Mart stores for $13, and is intended to allow the user to view OTA broadcasts using a WiFi connection to the device, which functions as an access point by default. There also seems to be an Eardatek Tevemo device which is similar. >From tear-down inspection as well as poking around the file system, some uses have concluded that the device could be used as a software defined radio with some software modifications (for example replacing the default ATSC server software with rtl_tcp). However, librtlsdr does not currently support the MxL608 tuner, and right now rtl_tcp (when placed on the openWRT device) defaults to direct sampling mode. There is a general sense in these discussion groups that MaxLinear's source code could be ported to work with librtlsdr, but someone would have to make that happen. I am sending this message to the group, to reach out with a humble request/suggest/beg that someone(s) please help us out by doing the following: 1. Sanity-check the claims being made; if what is being discussed is not workable, it would be of benefit for us to be told so. 2. Start work on forking librtlsdr and porting the MxL608 driver over (if possible/practical); 3. Coordinate with the broader community to beta-test and refine // help spread the knowledge so that the community can maintain/improve the fork and perhaps submit a pull-request in the future. Please let me know if I can help you help us by procuring/shipping a couple of hardware units for development purposes. I understand that asking people to do volunteer work can be presumptuous/annoying. All I can say in my defense is that there are already at least a few dozen people who would be really happy and appreciative if this came to fruition, and "one does not get what one does not ask for." Moreover, adding MxL608 support to librtlsdr might help broaden the hobby to include a whole bunch of other devices; MaxLinear tuners seem to be used a lot with set-top gear. Thank you very much, James "Gwen" Dallas, AD5NL Reddit user: texasyojimbo Phone: 1-713-254-4175 P.S. here are the existing discussion threads for reference: 1. RTL-SDR.com blog: https://www.rtl-sdr.com/tzumi-magictv-wifi-tv-tuner-device-contains-an-rtl-… 2. Reddit RTLSDR group: https://www.reddit.com/r/RTLSDR/comments/8mlbps/tzumi_magictv_is_an_openwrt… P.P.S here is a link to the existing MxL608 driver source code: https://github.com/avlogic/AVL6862/tree/master/2.10.7/tuner/MxL608 and data sheet: https://datasheet.lcsc.com/szlcsc/MXL608-AG-T_C141783.pdf

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Is it possible to provide a compressed file for every git tag?
by Filipe Laíns 27 May '18

27 May '18

Hi, I am packaging some of your software for Arch Linux. For that, I need to fetch the source tree I want to build. The problem is that there's no need to fetch the whole git repository to build a specific tag. As a solution, I propose that compressed files from every tag would be available, like GitHub releases. Please let me know if this is something you would consider doing. Thanks, Filipe Laíns (FFY00) https://github.com/FFY00 3DCE 51D6 0930 EBA4 7858 BA41 46F6 33CB B0EB 4BF2 Sent via Migadu.com, world's easiest email hosting

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