After much trouble shooting or debugging, I've found the reason was due to the signal(s) of the frequencies being to hot or too strong for the Hauppauge tuner chips!
On my 2013 Samsung ATSC televisions, I'm seeing a signal from one solid weak station or frequency being around 10-20%. The remaining four or five frequencies from the stronger stations are received at around 80-90% on my Samsung ATSC televisions. On the Hauppauge ATSC USB HVR-1950 & PCI-E HVR-2250 tuners, the signals were reporting in at extremely weak, bouncing from 0% to 30 or 50% if I were lucky, only locking onto a few channels or frequencies. This was while being connected directly to one of the Channel Master television distribution amplifier feeds. Using the following command to detect and see signal levels from the tuner chips: $ dvbv5-scan --adapter 1 -I CHANNEL ~/.mplayer/channels-initial_data_v3.conf I found dvbv5-scan output invaluable or excellent while trouble shooting, as dvbv5-scan output signal strength almost in real time. The file channels-initial_data_v3.conf is basically just a listing of frequencies, so users can easily add their own frequencies for better fine tuning or testing. In summary, I've added a simple two-way splitter onto one of the feed lines from the Channel Master television antenna distribution amplifier and immediately noticed the Hauppauge tuners finally detect the previously not found frequencies, as well as the other frequencies registering more sane signal strength values of 85% or more instead of only 40% previously! A little later, I just replaced the two-way splitter with a five-way splitter and the remaining weaker stations were finally detected by the Hauppauge tuners. Amazing. Results almost the opposite of what one would expect! But to those that understand what is going on here, easily explained but still easily over-looked. I'll follow-up later if I find addition info, but think I can pretty much close the book on this incidient. -- Roger http://rogerx.freeshell.org/ _______________________________________________ pvrusb2 mailing list [email protected] http://www.isely.net/cgi-bin/mailman/listinfo/pvrusb2
