osmocom-sdr

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917 discussions

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.

2 1

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

4 4

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

4 4

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)

1 0

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

1 0

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

4 3

RTLSDR Dongle Getting very hot even with out use.
by Bill Gaylord 25 May '18

25 May '18

I am having this problem with all of my dongles (from multiple sources) and was wondering if it could be some sort of problem with it not getting closed properly, In all cases the chip that gets hot is the actual SDR not the tuner. But I don’t understand why it is heating up when the dongle is not in use and is just plugged in. Or is this just some weird problem with the dongles. Sincerely, William

2 1

RTL-SDR Continuous Operation
by loay abdelrazek 25 May '18

25 May '18

Hello, would like to know, what is the average time that an RTL-SDR (R820T2) can run nonstop without affecting its internals The use case, is to sniff GSM packets noting that sniffing will take several intervals during the day, and the experiment should only run for 1 day , thus what could be the appropriate interval thanks

1 0

R820T Loop Through
by Carl Laufer 24 May '18

24 May '18

Is there any reason for this to be turned on during normal operation of the RTL-SDR? Turning it off seems to reduce current usage by 10 to 20 mA. To turn it off set reg 0x05 bit 7 to 1. Seems to turned be on by default. Haven't seen any effects from turning it off.

2 1

gr-osmodr patches
by andrea montefusco 24 May '18

24 May '18

Hi gr-osmosdr maintainer, can I respectfully ask if the several patches to the gr-osmosdr library, sent in the past months on this list, will have a chance to be considered in the near future? Many thanks in advance *am* -- Andrea Montefusco IW0HDV ------------------------------------------ As my old boss, an Apollo veteran, would often remind us “It’s good to be smart, but it’s better to be lucky.” Wayne Hale, Space Shuttle Flight Director

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