Re: [linux-dvb] DVB scan fails with Nova-TD - please help?
Jose, Thanks for the suggestion that the signal was too strong. I probably never would have guessed that and would have tried amplifying instead. Yesterday made some tests with my old MythTV box and Avermedia771 PCI card and I managed to scan all the channels directly connected into the roof antenna feed. This tells me that there is no problem with the connection. Today in the mail arrived another passive splitter and some attenuators. After connecting the passive splitter and a 12dB attenuator (the 6dB I also bought wasn't enough), I pick up all 88 of the services. It is really strange how the Avermedia771 can handle the signal strength as well as the Nova-TD in Windows, but not in Linux? - Original Message From: José Oliver Segura [EMAIL PROTECTED] To: Stephen G [EMAIL PROTECTED] Sent: Tuesday, January 15, 2008 2:16:33 PM Subject: Re: [linux-dvb] DVB scan fails with Nova-TD - please help? On Jan 15, 2008 2:33 PM, Stephen G [EMAIL PROTECTED] wrote: Maybe this is my problem... I seem to be able to scan when using the mini-antennas but as soon as I plug my main antenna into the small side port, I can't get anything (well when the main roof antenna is in either the side or the end). What type of attenuation did the guy put on? The guy put an splitter/attenuator very similar to the one Nicolas has sent: http://img466.imageshack.us/img466/8633/s1069zm.jpg The main difference is that the one I have (the one that the guy put) has a little screw that is used (turning it left or right) to increase/decrease de attenuation level (we had to play twisting it a lot, since the nova-t stick is very very very sensitive and, unless you get the right signal strength and/or signal/noise ratio level, it will fail miserabily on most channels depending on the frequency :-( ) I don't know if that sensitivy is specific to hauppauge or the modules inside (tuner, demodulator, etc.), since a few weeks ago I did a quick test with an Avermedia dual tuner (using only one tuner) and it was able to find and tune ok all channels :-/ Good luck! Jose ___ linux-dvb mailing list linux-dvb@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
Re: [linux-dvb] DVB scan fails with Nova-TD - please help?
On Jan 16, 2008 11:33 AM, Stephen G [EMAIL PROTECTED] wrote: Jose, Thanks for the suggestion that the signal was too strong. I probably never would have guessed that and would have tried amplifying instead. You're welcome. I was also following the same path (amplifiers instead of attenuators), so I guess it is an obvious idea for newbies (like I am) :) It is really strange how the Avermedia771 can handle the signal strength as well as the Nova-TD in Windows, but not in Linux? Yes, very strange. I did a test with a dual-tuner Avermedia (the one that is basically like the nova-td, I think), and it was also able to manage the signal strength. As I also pointed, windows drivers were also able to deal with high signal strength... I don't know if this can bring some light to developers in order to make the nova-t stick driver more... smart? Well, I don't know even if it is possible (maybe it dependes on some hidden functionality? some specific firmware version?) but, anyway, I hope these discoveries about the signal strength and the sensitivity of the nova-t help everybody. Anyway, just say thank you to all the developers for making all their best without official support from nobody!! (just in case some one got a wrong they do it wrong message!! :) ) Best, Jose ___ linux-dvb mailing list linux-dvb@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
Re: [linux-dvb] DVB scan fails with Nova-TD - please help?
I agree with this. It is great to have a small, USB dual DVB-T tuner working with Linux which allows me to build a minimal mythTV backend. Thanks for all the hard work with the drivers! - Original Message From: José Oliver Segura [EMAIL PROTECTED] To: Stephen G [EMAIL PROTECTED] Cc: linux-dvb@linuxtv.org Sent: Wednesday, January 16, 2008 11:15:47 AM Subject: Re: [linux-dvb] DVB scan fails with Nova-TD - please help? Anyway, just say thank you to all the developers for making all their best without official support from nobody!! (just in case some one got a wrong they do it wrong message!! :) ) Best, Jose ___ linux-dvb mailing list linux-dvb@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
[linux-dvb] DVB scan fails with Nova-TD - please help?
Hi I have a Hauppage nova-td USB stick and I'm using Ubuntu Gutsy, Kernel 2.6.22-14. I cannot seem to discover any channels when scanning. When I use the nove-td USB stick on a Windows PC (same cable and connection to roof antenna), I can pick up and watch about 65 channels! I downloaded and compiled and installed the latest drivers as per the instructions on the wiki. It seems as though the stick is detected ok: Jan 13 21:58:32 247 kernel: [ 599.52] dvb-usb: found a 'Hauppauge Nova-TD Stick/Elgato Eye-TV Diversity' in cold state, will try to load a firmware Jan 13 21:58:32 247 kernel: [ 599.53] dvb-usb: downloading firmware from file 'dvb-usb-dib0700-1.10.fw' Jan 13 21:58:33 247 kernel: [ 600.25] dvb-usb: found a 'Hauppauge Nova-TD Stick/Elgato Eye-TV Diversity' in warm state. Jan 13 21:58:33 247 kernel: [ 600.25] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. Jan 13 21:58:33 247 kernel: [ 600.25] DVB: registering new adapter (Hauppauge Nova-TD Stick/Elgato Eye-TV Diversity) Jan 13 21:58:33 247 kernel: [ 600.50] DVB: registering frontend 0 (DiBcom 7000PC)... Jan 13 21:58:33 247 kernel: [ 600.73] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. Jan 13 21:58:33 247 kernel: [ 600.73] DVB: registering new adapter (Hauppauge Nova-TD Stick/Elgato Eye-TV Diversity) Jan 13 21:58:33 247 kernel: [ 600.89] DVB: registering frontend 1 (DiBcom 7000PC)... Jan 13 21:58:34 247 kernel: [ 601.06] input: IR-receiver inside an USB DVB receiver as /class/input/input2 Jan 13 21:58:34 247 kernel: [ 601.06] dvb-usb: schedule remote query interval to 150 msecs. Jan 13 21:58:34 247 kernel: [ 601.06] dvb-usb: Hauppauge Nova-TD Stick/Elgato Eye-TV Diversity successfully initialized and connected. Jan 13 21:58:34 247 kernel: [ 601.06] usbcore: registered new interface driver dvb_usb_dib0700 I set the built-in amplifier on: [EMAIL PROTECTED]:~$ sudo cat /sys/module/dvb_usb_dib0700/parameters/force_lna_activation 1 When I scan however, I get nothing: [EMAIL PROTECTED]:~$ sudo scan -5 /usr/share/doc/dvb-utils/examples/scan/dvb-t/uk-CrystalPalace /home/sgreszcz/.tzap/channels.conf [sudo] password for sgreszcz: scanning /usr/share/doc/dvb-utils/examples/scan/dvb-t/uk-CrystalPalace using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' initial transponder 50583 0 3 9 1 0 0 0 tune to: 50583:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_AUTO:QAM_16:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE WARNING: filter timeout pid 0x0011 WARNING: filter timeout pid 0x WARNING: filter timeout pid 0x0010 dumping lists (0 services) Done. I've also tried dvbsnoop: [EMAIL PROTECTED]:~$ sudo dvbsnoop -s pidscan dvbsnoop V1.4.00 -- http://dvbsnoop.sourceforge.net/ - Transponder PID-Scan... - [EMAIL PROTECTED]:~$ ___ linux-dvb mailing list linux-dvb@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
Re: [linux-dvb] DVB scan fails with Nova-TD - please help?
I don't know if my experience with a nova-t stick can help, but... I found similar problems with that stick (as far as I know, the nova-td is like two nova-t in the same stick), my problems where: * With windows driver (hauppauge) able to scan, tune and watch around 40 channels (tv/radio) without any problem * With linux drivers (linuxtv), able to scan only around 30 channels, and some of them where not watchable (high unc values). My signal strenght was something between 48-52% (depending on the frequency), so I assumed it was a problem of signal strenght (I bas obsessed with signal amplification options!). Last week, the guy from the antennas store came to my house and he solved the problem... installing an *attenuator**!! He told me that, despite software signal strength reported was around 50%, his equipment was reporting 90dB-100dB of strength, very high. After installing the attenuator, signal strength is around 15-21%, and I can tune and watch all channels without problem. Seems that the windows drivers (or the firwmware) are able to deal with high strength signal (I don't know about quality) and that cannot be done under Linux? Well, just my experience, to see if that may help you. Best, Jose On Jan 15, 2008 11:32 AM, Stephen G [EMAIL PROTECTED] wrote: Hi I have a Hauppage nova-td USB stick and I'm using Ubuntu Gutsy, Kernel 2.6.22-14. I cannot seem to discover any channels when scanning. When I use the nove-td USB stick on a Windows PC (same cable and connection to roof antenna), I can pick up and watch about 65 channels! ___ linux-dvb mailing list linux-dvb@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
Re: [linux-dvb] DVB scan fails with Nova-TD - please help?
Jose, Thanks for the quick response. Another reader Olivier suggested that I plug in both antennas since the Windows drivers were probably using diversity or something on the main receiver. I attached one of the mini-antennas to the side connector and it seems to have picked up a few channels. I have ordered a splitter/amplifier so I will try it again in a couple of days with two full-sized coax coming from my main antenna feed. I was able to capture TV, but it came out a little broken due to the bad reception I think. [EMAIL PROTECTED]:~$ sudo scan -5 /usr/share/doc/dvb-utils/examples/scan/dvb-t/uk-CrystalPalace /home/sgreszcz/.tzap/channels.conf scanning /usr/share/doc/dvb-utils/examples/scan/dvb-t/uk-CrystalPalace using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' initial transponder 50583 0 3 9 1 0 0 0 tune to: 50583:INVERSION_AUTO:BANDWIDTH_8_MHZ:FEC_3_4:FEC_AUTO:QAM_16:TRANSMISSION_MODE_2K:GUARD_INTERVAL_1_32:HIERARCHY_NONE 0x 0x1044: pmt_pid 0x1044 BBC -- BBC ONE (running) 0x 0x1084: pmt_pid 0x1084 BBC -- BBC TWO (running) 0x 0x10ff: pmt_pid 0x10ff BBC -- BBC THREE (running) 0x 0x113f: pmt_pid 0x113f BBC -- BBC NEWS 24 (running) 0x 0x117f: pmt_pid 0x117f BBC -- BBCi (running) 0x 0x123f: pmt_pid 0x123f BBC -- CBBC Channel (running) [EMAIL PROTECTED]:~$ sudo tzap -r -c /home/sgreszcz/.tzap/channels.conf BBC ONE using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0' tuning to 50580 Hz video pid 0x0258, audio pid 0x0259 status 1f | signal 62cc | snr | ber 001f | unc 0026 | FE_HAS_LOCK status 1f | signal 62e9 | snr | ber 0df0 | unc | FE_HAS_LOCK status 1f | signal 6352 | snr | ber 5d80 | unc | FE_HAS_LOCK status 1f | signal 644f | snr | ber 5580 | unc | FE_HAS_LOCK ___ linux-dvb mailing list linux-dvb@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
Re: [linux-dvb] DVB scan fails with Nova-TD - please help?
IIRC, on my TD stick the first tuner is the connector on the side of the stick, the one thats need the tiny adaptor. The TD doesn´t have an onboard amp so the LNA parameter does nothing. /Henrik ___ linux-dvb mailing list linux-dvb@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
Re: [linux-dvb] DVB scan fails with Nova-TD - please help?
On Tue, 2008-01-15 at 05:12 -0800, Stephen G wrote: I have ordered a splitter/amplifier Those are usually bad. The only place where an amplifier helps is right on the antenna itself, where it amplifies the signal, not the signal AND all the noise inserted along the line between the antenna and the wall plug. Make sure you get a proper ugly tin can splitter if you do not want to climb on your roof, it will give you a better results than a splitter/amp combination from the supermarket. Get this: http://img466.imageshack.us/img466/8633/s1069zm.jpg not this: http://www.choiceful.com/prod_image/68007_m.jpg or this: http://www.buyworld.com.au/images/L2045.gif Nico ___ linux-dvb mailing list linux-dvb@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
Re: [linux-dvb] DVB scan fails with Nova-TD - please help?
Nicolas, Thanks, it makes sense what you say that an amplifier is best closest to the antenna otherwise it will amplify both the signal and noise. My antenna is already split once with an F-type splitter (http://www.maplin.co.uk/images/300/qq69.jpg) in the attic to give a connection to my TV and also a second connection to the Nova-TD which is connected to what will be my MythTV backend. I'm starting to think that maybe the antenna signal strength is actually too strong based on what Jose said. When I connect up the mini-antennas that comes with the Nova-TD I can pick up some channels. When I switch my main rooftop antenna feed into the side (mini) connection I don't get anything. I ordered some attenuators as well as another splitter (http://www.maplin.co.uk/images/300/jm13.jpg) to play around with. I should also try my main antenna with my old MythTV box with a Avermedia771 PCI card to see how it goes. - Original Message From: Nicolas Will [EMAIL PROTECTED] To: Stephen G [EMAIL PROTECTED] Cc: José Oliver Segura [EMAIL PROTECTED]; linux-dvb linux-dvb@linuxtv.org Sent: Tuesday, January 15, 2008 1:29:26 PM Subject: Re: [linux-dvb] DVB scan fails with Nova-TD - please help? On Tue, 2008-01-15 at 05:12 -0800, Stephen G wrote: I have ordered a splitter/amplifier Those are usually bad. The only place where an amplifier helps is right on the antenna itself, where it amplifies the signal, not the signal AND all the noise inserted along the line between the antenna and the wall plug. Make sure you get a proper ugly tin can splitter if you do not want to climb on your roof, it will give you a better results than a splitter/amp combination from the supermarket. Get this: http://img466.imageshack.us/img466/8633/s1069zm.jpg not this: http://www.choiceful.com/prod_image/68007_m.jpg or this: http://www.buyworld.com.au/images/L2045.gif Nico ___ linux-dvb mailing list linux-dvb@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
