On Mon, Mar 15, 2010 at 12:06 AM, Kevin Ross <span dir="ltr"><<a href="mailto:kevin@familyross.net">kevin@familyross.net</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div></div><div class="h5">Terence Ripperda wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I've been experimenting with MythTV, and recently added a second tuner. Ever since adding the second tuner, I've been having random trouble locking to the OTA signal on one of the 2 tuners. I haven't gathered a lot of data yet, but it appears to be random, isn't tied to either tuner specifically. Usually, when this happens, the current tuner will tune to some stations, but not other stations. if I switch to the "other source", I'm then able to tune into the station I'm having trouble with.<br>
<br>
Both tuners are identical Hauppauge HVR950Q usb sticks, using the xc5000 driver.<br>
<br>
I did have to use a coaxial splitter to split the incoming signal to both of the usb sticks. I noticed other mails on this list that indicated signal loss can cause problems like mine.<br>
<br>
I'm curious what the steps towards debugging something like this would be. if this is a signal loss issue, I can purchase a booster, but I'd like to know if there's a way to verify this is the cause, before I do spend money.<br>
<br>
I did catch this in my logs:<br>
<br>
2010-03-04 19:00:02.629 Started recording: Community "Physical Education": channel 1361 on cardid 2, sourceid 1<br>
2010-03-04 19:00:42.186 UPnpMedia: BuildMediaMap VIDEO scan starting in :/hosts/readynas/Mythtv/<br>
videos:<br>
2010-03-04 19:00:42.512 UPnpMedia: BuildMediaMap Done. Found 115 objects<br>
2010-03-04 19:01:15.262 AutoExpire: CalcParams(): Max required Free Space: 3.0 GB w/freq: 15 min<br>
2010-03-04 19:01:43.750 DevRdB(/dev/dvb/adapter0/frontend0) Error: Poll giving up<br>
2010-03-04 19:01:43.757 DVBSH(/dev/dvb/adapter0/frontend0) Error: Device error detected<br>
2010-03-04 19:01:43.814 DVBRec(2:/dev/dvb/adapter0/frontend0) Error: Stream handler died unexpectedly.<br>
2010-03-04 19:01:44.335 TVRec(2): Changing from Watching RecordingOnly to None<br>
<br>
I did not see any other errors in the kernel output (from the xc5000 driver).<br>
<br>
Thanks for any help/tips,<br>
Terence<br>
</blockquote>
<br></div></div>
To determine if the splitter is lowering your signal strength too much, when you have problems tuning a channel, remove the splitter and plug the antenna cable directly into the tuner and see if you can then tune the channel.</blockquote>
<div><br>Thanks Kevin, I'll give that a try tonight. is there also a way to log/see what the signal strength is of an active broadcast? I'd like to compare strength between various test cases.<br><br> <br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div></div><div class="h5"><br>
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