28 May 2009

ABC channels have gone

| ex-vectis
Join the conversation
33

Last night i noticed the ABC DVB-T channels had disapeared.

And they have still gone.

Anyone know whats going on?

[ED – looking fine here. Suggest you check your antenna and then re-tune the box.]

Join the conversation

33
All Comments
  • All Comments
  • Website Comments
LatestOldest

Damit rjj001!!!! You are bang on the button mate! Go and find a a ‘smug mode’ hat and put it on for a while; i am currently toasting you with cold tinny.

I sooo didnt want it to be that simple but that was it ‘EnableBloodyAutoOffset’.

I put that in, restarted the box clicked on ABC1 and hey-presto ABC is back!!

I’d written a small app that talked to the tuner using the low-level BDA interface and had noticed that ABC (205625Khz) was a little lower signal quality than the rest – so had thought that maybe Media Center had a signal quality threshold that was too high. But no, it looks like I’d been getting bleed-thru from (9A to 9).

So anyway, thanks rjj001 you got a geezer in Isaacs singing yer praise 🙂

I posted a a possible solution a couple of hours ago but is still”awaiting moderation” I guess they don’t like the posted links.

If you take a look at the xpmediacenter forum under vista media center there aare a couple of threads which may be of use to you. Inserting EnableAutoOffset value 1 into the registry seems to solve the problem if you have the right TV card. Unfortunately I don’t, my registry is completley different.

I had the same problem at around the same time. I have Vista Media Center and IceTV. I think it has something to do with Windows but I have no idea what. An update maybe? Anyway, I fixed it by deleting all of my channels and then re-adding them. Also had to do a bit of fiddling around in the registry to get IceTV guide back. Rescanning channels should do the trick for you though.

Well, after nearly two weeks of trying I have got… nowhere!

I borrowed a high-gain aerial from a mate and got a signal strenth/quality monitor going on the PC. All channels OK (including ABC ones), but still no picture!

The signal quality of ABC is quite poor, but then so is SC10 – yet SC10 channels play absolutely fine.

It is quite bizzarre, up until 27/18th May all was well and then suddenly no ABC channels. Kinda running out of ideas now….

Ex-vectis
Exactly the same problem – Turner area. No ABC channels on WMC after 27/28 of May. Today I’ve connected my old TEAC SD set top box to the television (normally I watch TV through Transact), tuned up and presto – all ABC channels are back. Then I’ve dragged my PC next to the same antenna outlet I used with my TEAC, connected everything , re-tuned WMC and – no ABC channels at all. In summary – for the same antenna – SD STB – ABC appear, WMC + HD TV card – ABC disappear. So the problem is SD works / HD doesn’t or SD / HD works – WMC doesn’t. If you find anything please post to this forum, I will do the same. Cheers Andrew

Well, its a nice way to spend a day of…. 🙂

Been Googling this like mad and have not found a solution. Yet.

On 27/28th May something changed. Before 28th May all was well, then ABC channels all died and cant be found again. So, if i can find out what changed then i might be nearer to fixing it. I have tried re-building the box and tried a different aerial but all come up with the same; no ABC channels.

In my Google searches, i see that ABC has been a bit of a DVB-T dog for years with folk often having issues. Most of which seems the addiction ABC have for using side-bands rather than actual channels

I did try forcing the frequency by use of the DigitalTVAutoTune key in the Registry but not sure if Media Center was using it and it still found all the other channels whereas I had only put the single Mux (205.625Mhz – 205625000Hz) in the registry….?

Looking both ideas (How DO you tell Media Center what frequencies to use for DVB-T channels? IE. Manual tuning!) and if anyone else has this issue. Any Vista Media Center users in Woden area using Black Mountain transmitter (ABC’s on 205MHz so says Media Center).

ev

Sorry rjj, been out the territory…

And STILL no ABC channels. No ABC1, ABC2, ABC3 or HD – it is just bizzarre.

I tried deleting ALL channels, removing the epgstream guide, re-installing the (Compro e900f) tuner card, using a different (borrowed) high-gain arial; but all no go. All the other channels are OK, it is just ABC ones that are duff.

Looking at the direction of the roof arial it is the Telstra Tower we are using (Isaacs and Farrer ridges would prob get in the way).

When using Analogue tuning, i get ABC but there is some degree of Ghosting (But no ghosting on non-ABC channels).

Something must have happened last week; either with a Microsoft update or with the transmitted signal. ABC in Sydney assure me their has been no change or issues reported from their ACT transmitters, but clearly _something_ has happened. I’m just a bit purplexed at the mo.

Interesting you say about the ABC frequency. Do you know how to force Media Centre to use a specific frequency? I’ll start doing a search..

ex-vectis said :

Well, it looks like it was me! Or at least the Windows Media Center….

In a last-ditch attempt i deleted everything and did a scan-from-scratch – hey presto, ABC stuff back!!!

quote]

Hi Ex-Vectis, I’ve been having the same problem since Thursday. Seems to be a few of us in Canberra appearing on the web today with the same issues of ABC vanishing from media center. Which files did you delete? Do not want to mess up my system by deleting the wrong things. I’m sure it s the problem with ABC being 205.625 MHz, rather than 205.5. Which tower are you recieving ABC, Telstra?

justbands said :

+ 1 for MythTV. Free, easy (wih a bit of effort) & all runs on our old PC that was way too slow for windoze.

I tried MythTV once but didn’t like it because it’s designed to run the PC as a set-top box.

I watch all my free to air TV on Ubuntu with Kaffeine.
The TV is setup on the TV-OUT of the video card so we can browse the net and stuff on the main monitor while video is playing on the TV,, and I’ve got two xorg.conf files that I switch between when I want to use the projector instead of the TV

The other plus with Ubuntu/Linux is that the drivers for my TV-tuner card and my IR dongle are automatically installed, and the PC handles the workload much better under Linux too.

More on topic – My reception for certain channels can be extremely flakey some days – we get a fairly weak signal at the best of times, and all it takes is a little interference to take a channel down.
As a result, most of our TV watching now is done from ABC iView (quota free from iinet) – no reception issues there 🙂

bigred said :

My TV keeps turning on by itself, changing to SBS or turning off. Suspect my neighbours remote control is controlling my TV. Any ideas?

TV remotes work on infrared light – they don’t go through walls. There’s at least 3 explanations:

1) Your remote is sending the “on/off” and “sbs” codes without you pressing the button sometimes: Hide the remote somewhere lightproof.
2) Something else is sending the codes (EG flickering fluoro light, as above, your neighbours sneaking up to your window): Tape over the TV’s IR receiver to stop it receiving signal. Test that it’s well taped over by putting the remote up close and pressing it.
3) Your TV has an internal fault and thinks it’s receiving those codes when it’s not.

+ 1 for MythTV. Free, easy (wih a bit of effort) & all runs on our old PC that was way too slow for windoze.

astrojax said :

ahh, the wonderful world of digital signals for everything.

do we think these ‘glitches’ will be mere nostalgia in a decade or so; or will this kind of interference persist and become part of the joy of watching teev/listening to abc breakfast/keeping logged on to the ‘net/etc…?

wait till you see the microwave interfering with the pc on the other side of the wall. V Funny. Techs don’t think so tho. flickering screen – intermittent fault.

ahh, the wonderful world of digital signals for everything.

do we think these ‘glitches’ will be mere nostalgia in a decade or so; or will this kind of interference persist and become part of the joy of watching teev/listening to abc breakfast/keeping logged on to the ‘net/etc…?

Inappropriate8:27 am 29 May 09

Pickle said :

RE “TV keeps turning on by itself, changing to SBS or turning off. … Any ideas?”

It was apparently Fluorescent lights that interfere with the remote control sensor on old Digitech set top boxes. They apparently caused random changes to the settings or the Channel.

Pretty annoying for the 80 year old who was trying to figure out what he did wrong…

Yeah, those new compact fluros can interfere with remote/IR signals.

RE “TV keeps turning on by itself, changing to SBS or turning off. … Any ideas?”

It was apparently Fluorescent lights that interfere with the remote control sensor on old Digitech set top boxes. They apparently caused random changes to the settings or the Channel.

Pretty annoying for the 80 year old who was trying to figure out what he did wrong…

Use Linux OS and Myth TV as your media software, best thing of all its all free, and is not a system resource hog like Vista. I will use the set top box when they shut down the analog signal. I have too many remotes as it is.

I think, looking at the direction of the aerial, that i get Telstra-tower TV. Reckon if i got on the rook i’d be able to see it from here, so most likely. I think Farrer ridge is in the way for Tuggers… But thanks anyway

Thanks gooterz, but (fingers crossed) all is working aok at the mo (it has been relatively glitch-free for nearly a year, hence my conclusion jumping that it wasn’t the machine. I’ve also got a Compro (E900) – while i love the pic and the speed etc, the Compro s/w is pants (and remote s/w is b****y awful! 1-4% CPU when not doing anything! Thats just negligent that is….) Shame, ifCompro sorted their s/w then they’d have a real world beater tunercard i reckon.

Yeah, i use Vista Media Center – its not great (typical MS ‘almost’ there software but has the ‘BETA’ feel to it) but with a tech-illiterate other half (it is the TV) i dont want to faf with 3rd party s/w.. The ‘TV’ also acts as webserver, shareaza host, squeezebox server etc etc…. (the nas is not MS, that is ‘FreeNAS’ – i didnt want to get into bed with MS lock stock and two smokin barrels!).

Glad you’ve sold your problem, but for what it’s worth, the ABC channel transmits at 200kw, where the commercials all run around the 60kw mark.

With a direct line of sight from Curtin to Black Mountain, I couldn’t get the ABC to lock when tuning. My set top box showed the strength bar way over the 90% green line, right into the red. It took a $10 attenuator to drop the signal to an appropriate level. With that in place, there was no problem syncing the ABC, and the other channels didn’t suffer from it…

I’ve got the compro T750 both analog and digital incaseone doesnt work. I’m getting all the channels now too.

You can normally use media portal for most tuners if you dont like media centre. Plus you dont have to save the files in the windows format.

If you want i can post the Codes and PID’s for tuggerangong?

Hahahah! That is the sort of put down i use! 🙂

But Microsoft products are always so reliable I just thought it couldn’t be that… lol

I’d still love to know what happened tho. I’m wondering if some update mucked with the settings or if the epg service minced something.

gooterz, what tuner u using?

Well, it looks like it was me! Or at least the Windows Media Center…

So…you were using a bit of windows software, had a problem, and your first thought was that it must be an external fault?
You must be new at this.

sexynotsmart7:09 pm 28 May 09

+1 for dropouts in Tuggeranong.

It may happen during the day, but I don’t have the tv on then. I barely make it home in time to lust after Sarah Groen or Virginia Hausseger.

The ABC-HD service is a joy. It gives you the Sydney news, not that disconcertingly weird weatherman with the sequoia trunk on his lapel.

I can’t get Win to tune mostly because its not quite on the right frequency( according to my tuner. its about 500 hz on what the frequncy shouldbe.. hence when my tuner scans the correct location it stuffs up ocassionally.. However most STB’s have more advanced hardware due to size so they pick up the channel better even if off channel a little bit

Some of the tuners allow you to set the channels manually which you can adjust for the offset. you can even just put in what the channels are even if they wont scan

its either aliens or reptoids

thought about those ex-vectis, but also happens when none of those are present or even when nobody is home. DO you really think it could be aliens?

Well, it looks like it was me! Or at least the Windows Media Center….

All ABC channels dissapeared (ABC1, ABC2 and ABC-HD etc) and doing a ‘Scan’ didnt find them. I phoned the ABC Transmitter fault folk in Sydeny who said ‘everything was fine’.

So i checked the aerial, leads etc but they were all ok too.

In a last-ditch attempt i deleted everything and did a scan-from-scratch – hey presto, ABC stuff back!!!

Have no idea what happened nor why only ABC channels were affected. But all is back again. Very odd – and probably not a Transmitter fault at all.

To those having ‘issues’ as well, sorry guys not entirley sure what is going on. Bigred, have you checked for aliens? That would really freak me out! However, check to make sure you havent got a laptop IRon or your mobile maybe????

My TV keeps turning on by itself, changing to SBS or turning off. Suspect my neighbours remote control is controlling my TV. Any ideas?

It’s not a hardware issue with ABC, at least not in Tuggeranong. ABC and SBS have been going off the air for 30-50mins quite regularly over the last month, normally after 9pm. Quite annoying.

PLeased to see this happens to someone else – I have a good ABC picture during the day but at night get “no signal”.

If you have a Topfield, can i suggest periodically ‘refreshing’ the factory default settings. Mine seems to become forgetful and lose track of things its been doing week in week out, then it cant retrieve TV guide data, then it forgets that channels exist. i now do a restore factory default each 6 weeks or so.

Daily Digest

Want the best Canberra news delivered daily? Every day we package the most popular Riotact stories and send them straight to your inbox. Sign-up now for trusted local news that will never be behind a paywall.

By submitting your email address you are agreeing to Region Group's terms and conditions and privacy policy.