129 replies to this topic

[Puss in Books]

DrP, on Aug 19 2010, 04:57 PM, said:

On other issues raised, a single USB2 (USB based DVB-t receivers are essentially exclusively USB2 capable) port is capable of carrying 480 megabits/sec or to put it another way, a single USB2 port can carry 20 x 24Mbit DVB-t transport streams.  If that isn't sufficient capacity I'm afraid I don't know what would be.  USB3, for what its worth, raises the bar to 5 gigabits/sec.

This is probably a fairly moot point since even this limitation is generous, but I think it is the USB controller that is constrained by the 480mb/s limit.  If I understand correctly, a typical motherboard will have 1 USB controller which is shared by all ports, so all ports in aggregate cannot exceeed the 480mb/s.  Of course, if you only use 1 port at a time, then that port should achieve 480mb/sec.

[DrP]

The aggregate of all channels depends on the capacity of the controller.  However its been quite a long time since I've seen a USB controller that was not capable of running all its ports full tilt, simultaneously.

The average PC has several USB controllers these days, even if they are all integrated into the same piece of silicon.  The PC that I am using right now has 8 USB controllers (6 on one chip, 2 on another).

Just as a test, I've hooked up two USB hard disks and viewed their relationship via device manager to see that both are connected to the same logical USB controller and then copied files off both hard disks at the same time.  Throughput exceeded 480Mbit/sec by a very wide margin.

[renura]

More details here:
http://www.digitalno...pages/Quad.html

[aidan]

drubie, on Aug 19 2010, 04:35 PM, said:

Well, true, but I'm the idiot that built a ghetto PVR out of a second hand NSLU2, Debian and $30 USB stick.

I think a Sheevaplug, two USB 2.0 hubs, 12 $10 USB tuners, a 2TB drive and a shedload of coax and you'd have ample tuners to literally record everything transmitted, all the time, for about $400, running on 10 watts.

It would be ugly though.

Is there something in the air up there in Northern NSW? Particularly thin ozone hole letting through too much radiation and frying some brains?

There is something going on, coz there are crazy-interesting things happening in your brain Mr Rubie.

I loved the idea of the ghetto PVR, even if the hardware wasn't quite up to speed.

This 10-tuner sheevaplug octopus is some kind of mad-genius.

With regards to the USB tuners in your kid's netbooks, don't they have problems with digital reception and having to piss about getting the antenna right?

One more thing, do you know if these cheapies work with OSX?

[DrP]

Why on earth have 10 tuners?  There's only 5 (or 6 depending on your location) muxes on air.

[jasoroony]

DrP, on Aug 26 2010, 02:50 PM, said:

Why on earth have 10 tuners?  There's only 5 (or 6 depending on your location) muxes on air.

We have 9 on the Gold Coast.

[myrantz]

DrP, on Aug 26 2010, 12:50 PM, said:

Why on earth have 10 tuners?  There's only 5 (or 6 depending on your location) muxes on air.

Don't think he used all 9.. He buys 10... But prob used a few...

jasoroony, on Aug 26 2010, 12:53 PM, said:

We have 9 on the Gold Coast.

But multiple channels exist on the same thingy.. No idea what it's called now... e.g. with a single tuner I can record 3 shows 7, 72, 7mate all at once.

[jasoroony]

treblid, on Aug 26 2010, 02:55 PM, said:

But multiple channels exist on the same thingy.. No idea what it's called now... e.g. with a single tuner I can record 3 shows 7, 72, 7mate all at once.

No, really, we have 9 different ones.

[DrP]

Several of which contain identical programming and therefore could be discarded.

[jasoroony]

DrP, on Aug 26 2010, 03:23 PM, said:

Several of which contain identical programming and therefore could be discarded.

I never said there wasn't heaps of duplicates, but we still get:

seven
nine
ten
abc
sbs
prime
nbn
sc10
bris31 (or whatever it's called now)

and there are times when they (the three you are referring to) are showing different things, including news and late night stuff.  If you were "monitoring" things like media monitors do, you would want 9 tuners, here on the Gold Coast at least.

[myrantz]

jasoroony, on Aug 26 2010, 01:31 PM, said:

If you were "monitoring" things like media monitors do, you would want 9 tuners, here on the Gold Coast at least.

Dammit. here in WA we only got 5.. Would be so fun to have a 10 tuner DVR....

[jasoroony]

treblid, on Aug 26 2010, 03:44 PM, said:

Dammit. here in WA we only got 5.. Would be so fun to have a 10 tuner DVR....

Naaa, I only use 6 - unless there's something special on and it goes to 7.

[myrantz]

Any updates so far? It says "ETA Late".. Which is good in a way for me I guess as I'm waiting for payday..

Also the specs also mentioned "#  Linux Users, please contact  support"...   What for?

[renura]

treblid, on Sep 24 2010, 11:55 AM, said:

Any updates so far? It says "ETA Late".. Which is good in a way for me I guess as I'm waiting for payday..

Also the specs also mentioned "#  Linux Users, please contact  support"...   What for?

Should be here next week. We have a Linux driver that you can try

[myrantz]

renura, on Sep 24 2010, 12:43 PM, said:

Should be here next week. We have a Linux driver that you can try

that sounds a bit worrying, do you have a driver that works?

(ATM using the latest stable kernel 2.6.35.5 and I hope it's already in there?)

Any linux beta testers you have with issues?

[renura]

treblid, on Sep 24 2010, 02:47 PM, said:

that sounds a bit worrying, do you have a driver that works?

(ATM using the latest stable kernel 2.6.35.5 and I hope it's already in there?)

Any linux beta testers you have with issues?

It has been tested by a third party to work (for DVB-T), not in the kernel as far as i know.
We got someone who is going to check/comfirm this and write a how to guide for Linux, hopefully soon.

[dJOS]

My Quad is in the mail and should arrive this week, it will replace one of my Dual Hybrid S2's that failed last week - i'm looking forward to having 6 Tuners.

[dJOS]

Mine arrived today and I just setup my quad with my dual hybrid s2 in our 7 Media Center - had to use TunerSalad to enable the last 2 tuners (BSE method didnt work for some reason) but happy with the result. I didn't even have to install drivers, Win7 picked them up by itself.

I'm not going to bother with dab+ as I'm not planning to use radio at all on our media center.

[noobz]

anyone has an idea of digitalnow quad tuner compare to hauppauge 2210?

is the remote that come with digitalnow quad tuner same as the genuine 1039 microsoft remote? i after the remote for so long...

[renura]

noobz, on Oct 6 2010, 11:19 PM, said:

anyone has an idea of digitalnow quad tuner compare to hauppauge 2210?

is the remote that come with digitalnow quad tuner same as the genuine 1039 microsoft remote? i after the remote for so long...

The Hauppauge 2210 is the same as the Dual Hybrid PCIe (7164 ) card
http://www.digitalno...s/Dual7164.html
ie: two Hybrid tuners with analog inputs.


The DigitalNow Quad DVB-T is a FOUR DVB-T PCIe card with DAB+ and FM Radio support
http://www.digitalno...pages/Quad.html

Totally different products.

The remote is designed to work with Media Center, but it is not a 1039 microsoft remote.

[peterept]

Received my Quad card yesterday and I have to congratulate you - it works brilliantly, and the install process was one of the easiest I've ever seen.

Great card!

Thanks,

Peter

[myrantz]

Linux support writeup??? Prob missed it, or not refreshed, is there a docu somewhere?

[renura]

treblid, on Oct 7 2010, 11:08 AM, said:

Linux support writeup??? Prob missed it, or not refreshed, is there a docu somewhere?

Unfortunately we are having some issues with Linux. We have one developer who reckons got it all working and two users who have tried and not managed to get it going under different version of Linux.

So my suggestion is wait, if Linux is imperative for you, until we have something better.

[renura]

peterept, on Oct 7 2010, 09:23 AM, said:

Received my Quad card yesterday and I have to congratulate you - it works brilliantly, and the install process was one of the easiest I've ever seen.

Great card!

Thanks,

Peter

Good to hear all is well.
Thanks.

[dJOS]

I'm super impressed with my quad + dual setup, really humming along nicely - the only drama I had was dropping in an 2 extra tuners (the quad replaced a failed dual) required me to dig up my kingray amplifier to boost the signal as I was getting some breakup due to having 6 tuners in the lounge and 1 in the family room all without a distribution amp.

Edited by dJOS, 07 October 2010 - 01:01 PM.