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sledgehammer

Joined: Fri Jul 28, 2006 3:03 pm Posts: 44
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Posted: Sun Sep 02, 2012 10:53 am Post subject: |
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| wyliecoyoteuk wrote: |
If you read the link in my post, there is a pretty clear explanation there.
The signal travels between the core and the shield as an AC electrical signal, not as radio wave. That is how capacitance and AC work. Basic stuff really. |
I think that means you agree with me  |
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wyliecoyoteuk LXF regular

Joined: Sun Apr 10, 2005 11:41 pm Posts: 3358 Location: Birmingham, UK
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Posted: Sun Sep 02, 2012 5:52 pm Post subject: |
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| sledgehammer wrote: | | wyliecoyoteuk wrote: |
If you read the link in my post, there is a pretty clear explanation there.
The signal travels between the core and the shield as an AC electrical signal, not as radio wave. That is how capacitance and AC work. Basic stuff really. |
I think that means you agree with me  |
No. Have you actually read the article in the link?
The term waveguide is not limited to RF signals.
The signal effectively travels in the electrical field between the core and the shield, which is why it is referred to as a "type of waveguide".
Which is incidentally why crushing or bending the wire stops the signal. _________________ The sig between the asterisks is so cool that only REALLY COOL people can even see it!
*************** ************ |
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sledgehammer

Joined: Fri Jul 28, 2006 3:03 pm Posts: 44
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Posted: Sun Sep 02, 2012 9:09 pm Post subject: |
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| wyliecoyoteuk wrote: |
No. Have you actually read the article in the link?
The term waveguide is not limited to RF signals.
The signal effectively travels in the electrical field between the core and the shield, which is why it is referred to as a "type of waveguide".
Which is incidentally why crushing or bending the wire stops the signal. |
In your original reply you stated that the coax 'functions almost like a waveguide' ie you are recognising there is a difference between coax and waveguide. Either coax is or isn't waveguide, which is it?
I would say that coax and 'empty box' waveguides are type of waveguide in the same way that petrol and diesel are forms of petroleum but you wouldn't want to get them confused.
Coax will attenuate more as the frequency increases and supports modes that 'waveguide' does not, Waveguide only works above the cut off frequency as described in the link you have given.
I apologise for picking you up on 'waveguide' and you may still of course disagree, its a minor point and probably doesn't warrant a thread hijack.
Regards |
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bobthebob1234 LXF regular

Joined: Thu Jan 03, 2008 9:38 pm Posts: 1356 Location: A hole in a field
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Posted: Fri Nov 16, 2012 6:24 pm Post subject: |
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Ok this is getting silly.
I am hopefully speaking too soon, but I have had to reboot 3 times in the past 48hrs to reset or whatever to make my new tuner work (straight replacement for the old one).
It also seems to take MythTV down with it, as I cannot get onto the web interface and it doesn't even try and record other stuff.
I think the USB freeview tuner I have continues to work though.
Any logs, etc I could take a look at to shine any more light?
The computer is on a surge protector, but I do notice the light flicker sometimes, so maybe we are having mini brown outs. Perhaps I will invest in a UPS.
Tis getting a tad annoying  _________________ For certain you have to be lost to find the places that can't be found. Elseways, everyone would know where it was |
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bobthebob1234 LXF regular

Joined: Thu Jan 03, 2008 9:38 pm Posts: 1356 Location: A hole in a field
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Posted: Fri Nov 16, 2012 7:39 pm Post subject: |
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Also get this come up when running frontend on different computer when trying to watch live tv when freesat tuner has gone odd:
| Code: |
2012-11-16 19:32:11.604263 I TV: Creating TV object
2012-11-16 19:32:11.693161 N Resuming idle timer
2012-11-16 19:32:11.693175 N Suspending idle timer
2012-11-16 19:32:11.702178 I TV: Created TvPlayWindow.
2012-11-16 19:32:11.786406 I TV: Attempting to change from None to WatchingLiveTV
2012-11-16 19:32:11.786457 I MythCoreContext: Connecting to backend server: 192.168.1.10:6543 (try 1 of 1)
2012-11-16 19:32:11.788273 I Using protocol version 72
2012-11-16 19:32:11.935077 I MythCoreContext: Connecting to backend server: 192.168.1.10:6543 (try 1 of 1)
2012-11-16 19:32:11.936651 I Using protocol version 72
2012-11-16 19:32:11.937298 N TV: Spawning LiveTV Recorder -- begin
2012-11-16 19:32:18.942020 E MythSocket(1f2da10:92): readStringList: Error, timed out after 7000 ms.
2012-11-16 19:32:18.942092 E RemoteEncoder::SendReceiveStringList(): No response.
2012-11-16 19:32:18.942115 N TV: Spawning LiveTV Recorder -- end
2012-11-16 19:32:18.943896 E GetEntryAt(-1) failed.
2012-11-16 19:32:18.943986 E It appears that your backend may be misconfigured. Check your backend logs to determine whether your capture cards, lineups, channels, or storage configuration are reporting errors. This issue is commonly caused by failing to complete all setup steps properly. You may wish to review the documentation for mythtv-setup.
2012-11-16 19:32:18.944077 E EntryToProgram(0@Thu Jan 1 01:00:00 1970) failed to get pginfo
2012-11-16 19:32:18.944093 E TV: HandleStateChange(): LiveTV not successfully started
2012-11-16 19:32:18.944153 E TV: LiveTV not successfully started
2012-11-16 19:32:18.954270 I TV: Main UI disabled.
2012-11-16 19:32:18.955121 I TV: Entering main playback loop.
2012-11-16 19:32:18.963726 I ScreenSaverX11Private: DPMS Deactivated 1
2012-11-16 19:32:18.965326 I TV: Exiting main playback loop.
2012-11-16 19:32:19.001674 N Resuming idle timer
2012-11-16 19:32:20.450988 I TV: Creating TV object
2012-11-16 19:32:20.479917 N Resuming idle timer
2012-11-16 19:32:20.479952 N Suspending idle timer
2012-11-16 19:32:20.483275 I TV: Created TvPlayWindow.
2012-11-16 19:32:20.567432 I TV: Attempting to change from None to WatchingLiveTV
2012-11-16 19:32:20.567475 I MythCoreContext: Connecting to backend server: 192.168.1.10:6543 (try 1 of 1)
2012-11-16 19:32:20.569141 I Using protocol version 72
2012-11-16 19:32:20.683573 I MythCoreContext: Connecting to backend server: 192.168.1.10:6543 (try 1 of 1)
2012-11-16 19:32:20.684524 I Using protocol version 72
2012-11-16 19:32:20.684886 N TV: Spawning LiveTV Recorder -- begin
2012-11-16 19:32:27.685299 E MythSocket(1e85170:92): readStringList: Error, timed out after 7000 ms.
2012-11-16 19:32:27.685372 E RemoteEncoder::SendReceiveStringList(): No response.
2012-11-16 19:32:27.685396 N TV: Spawning LiveTV Recorder -- end
2012-11-16 19:32:27.687165 E GetEntryAt(-1) failed.
2012-11-16 19:32:27.687180 E It appears that your backend may be misconfigured. Check your backend logs to determine whether your capture cards, lineups, channels, or storage configuration are reporting errors. This issue is commonly caused by failing to complete all setup steps properly. You may wish to review the documentation for mythtv-setup.
2012-11-16 19:32:27.687252 E EntryToProgram(0@Thu Jan 1 01:00:00 1970) failed to get pginfo
2012-11-16 19:32:27.687267 E TV: HandleStateChange(): LiveTV not successfully started
2012-11-16 19:32:27.687298 E TV: LiveTV not successfully started
2012-11-16 19:32:27.699391 I TV: Main UI disabled.
2012-11-16 19:32:27.700318 I TV: Entering main playback loop.
2012-11-16 19:32:27.701971 I ScreenSaverX11Private: DPMS Reactivated 1
2012-11-16 19:32:27.702949 I ScreenSaverX11Private: DPMS Deactivated 1
2012-11-16 19:32:27.703673 I TV: Exiting main playback loop.
2012-11-16 19:32:27.717046 N Resuming idle timer
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_________________ For certain you have to be lost to find the places that can't be found. Elseways, everyone would know where it was |
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wyliecoyoteuk LXF regular

Joined: Sun Apr 10, 2005 11:41 pm Posts: 3358 Location: Birmingham, UK
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Posted: Sat Nov 17, 2012 4:29 pm Post subject: |
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/var/log/mythtv is the place to start looking _________________ The sig between the asterisks is so cool that only REALLY COOL people can even see it!
*************** ************ |
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bobthebob1234 LXF regular

Joined: Thu Jan 03, 2008 9:38 pm Posts: 1356 Location: A hole in a field
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Posted: Tue Nov 20, 2012 10:44 pm Post subject: |
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Right it has happened again. The channel 5* seems to be one of its triggers...
First signs of something going wrong are here
| Code: | Nov 20 21:33:01 civo mythbackend[1804]: E DVBRead dvbstreamhandler.cpp:214 (RunTS) DVBSH(/dev/dvb/adapter0/frontend0): Device EOF detected
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then some stuff about the previous recording which did work
| Code: | Nov 20 21:33:01 civo mythbackend[1804]: E CoreContext mainserver.cpp:871 (customEvent) MainServer: PREVIEW_SUCCESS but no receivers.
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then
| Code: | Nov 20 21:33:13 civo mythbackend[1804]: I Scheduler scheduler.cpp:2080 (HandleReschedule) Reschedule interrupted, will retry
Nov 20 21:33:13 civo mythbackend[1804]: I Scheduler scheduler.cpp:2033 (HandleReschedule) Reschedule requested for id 0.
Nov 20 21:33:25 civo mythbackend[1804]: I Scheduler scheduler.cpp:2093 (HandleReschedule) Scheduled 750 items in 12.0 = 0.00 match + 12.00 place
Nov 20 21:33:46 civo mythbackend[1804]: I Metadata_3053 jobqueue.cpp:2151 (DoMetadataLookupThread) JobQueue: Metadata Lookup Starting for "New Girl":"Bad in Bed" recorded from channel 9305 at 2012-11-20T20:57:00
Nov 20 21:33:47 civo mythbackend[1804]: I ProcessRequest mainserver.cpp:1360 (HandleAnnounce) MainServer::ANN Monitor
Nov 20 21:33:47 civo mythbackend[1804]: I ProcessRequest mainserver.cpp:1362 (HandleAnnounce) adding: civo as a client (events: 0)
Nov 20 21:33:47 civo mythbackend[1804]: I ProcessRequest mainserver.cpp:1360 (HandleAnnounce) MainServer::ANN Monitor
Nov 20 21:33:47 civo mythbackend[1804]: I ProcessRequest mainserver.cpp:1362 (HandleAnnounce) adding: civo as a client (events: 1) |
which may or may not be connected, then we get something more interesting
| Code: | Nov 20 21:34:02 civo mythbackend[1804]: E DVBRead dtvsignalmonitor.cpp:321 (HandlePAT) DTVSM(/dev/dvb/adapter0/frontend0): Program #1413 not found in PAT!#012Program Association Section#012 PSIP tableID(0x0) length(81) extension(0x7e5)#012 version(27) current(1) section(0) last_section(0)#012 tsid(2021) programCount(18)#012 program number 0 has PID 0x0010#012 program number 4214 has PID 0x0101#012 program number 5515 has PID 0x010c#012 program number 1306 has PID 0x010f#012 program number 1307 has PID 0x0110#012 program number 4208 has PID 0x0100#012 program number 4219 has PID 0x0103#012 program number 4216 has PID 0x0102#012 program number 4511 has PID 0x0107#012 program number 4221 has PID 0x0104#012 program number 4513 has PID 0x0108#012 program number 5522 has PID 0x010e#012 program number 1403 has PID 0x0106#012 program number 6040 has PID 0x0113#012 program number 6036 has PID 0x0111#012 program number 5500 has PID 0x0105#012 program number 8015 has PID 0x0135#012 program number 8058 has PID 0x0109
Nov 20 21:34:03 civo mythbackend[1804]: E DVBRead mpeg/mpegstreamdata.cpp:819 (ProcessPAT) ProcessPAT: Program not found in PAT. Rescan your transports.
Nov 20 21:34:03 civo mythbackend[1804]: E DVBRead mpeg/mpegstreamdata.cpp:425 (CreatePATSingleProgram) Desired program #1413 not found in PAT.#012#011#011#011Cannot create single program PAT.
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Then some houskeeping and handleannouce's then
| Code: | Nov 20 21:50:31 civo mythbackend[1804]: E DVBRead dtvsignalmonitor.cpp:321 (HandlePAT) DTVSM(/dev/dvb/adapter0/frontend0): Program #7851 not found in PAT!#012Program Association Section#012 PSIP tableID(0x0) length(17) extension(0x7ef)#012 version(22) current(1) section(0) last_section(0)#012 tsid(2031) programCount(2)#012 program number 4009 has PID 0x0100#012 program number 4040 has PID 0x0101
Nov 20 21:50:32 civo mythbackend[1804]: E DVBRead mpeg/mpegstreamdata.cpp:819 (ProcessPAT) ProcessPAT: Program not found in PAT. Rescan your transports.
Nov 20 21:50:32 civo mythbackend[1804]: E DVBRead mpeg/mpegstreamdata.cpp:425 (CreatePATSingleProgram) Desired program #7851 not found in PAT.#012#011#011#011Cannot create single program PAT.
Nov 20 21:54:39 civo mythbackend[1804]: I HouseKeeping housekeeper.cpp:225 (RunHouseKeeping) Running housekeeping thread
Nov 20 21:55:00 civo mythbackend[1804]: N Expire autoexpire.cpp:263 (CalcParams) AutoExpire: CalcParams(): Max required Free Space: 3.0 GB w/freq: 14 min
Nov 20 21:56:00 civo mythbackend[1804]: E DVBRead dtvsignalmonitor.cpp:321 (HandlePAT) DTVSM(/dev/dvb/adapter0/frontend0): Program #3843 not found in PAT!#012Program Association Section#012 PSIP tableID(0x0) length(33) extension(0x7f0)#012 version(4) current(1) section(0) last_section(0)#012 tsid(2032) programCount(6)#012 program number 3803 has PID 0x0101#012 program number 3841 has PID 0x0103#012 program number 3842 has PID 0x0100#012 program number 3874 has PID 0x0102#012 program number 3879 has PID 0x0109#012 program number 4034 has PID 0x0104
Nov 20 21:56:01 civo mythbackend[1804]: E DVBRead mpeg/mpegstreamdata.cpp:819 (ProcessPAT) ProcessPAT: Program not found in PAT. Rescan your transports.
Nov 20 21:56:01 civo mythbackend[1804]: E DVBRead mpeg/mpegstreamdata.cpp:425 (CreatePATSingleProgram) Desired program #3843 not found in PAT.#012#011#011#011Cannot create single program PAT. |
then we get
| Code: | Nov 20 21:57:00 civo mythbackend[1804]: W TVRecEvent dvbchannel.cpp:347 (CheckFrequency) DVBChan(2:/dev/dvb/adapter0/frontend0): Your frequency setting (10964250) is out of range. (min/max:950000/2150000)
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Hmmm 10964250 does seem to be bigger than 2150000...
Possibly a mis configuration? I'm pretty sure I followed http://parker1.co.uk/mythtv_freesat.php to the letter...
The EOF stuff brings http://ubuntuforums.org/showthread.php?t=1983887 up on google, with no solution...
Full log here _________________ For certain you have to be lost to find the places that can't be found. Elseways, everyone would know where it was |
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