Jump to content

TT TVStick USB


B1G

Recommended Posts

Hi, i'm using latest DVBViewer pro version (no beta) and Technotrend TVStick usb2 ....it's all ok but sometimes i get some glitches while watching any channell.

 

What can i do?

 

I have windows xp sp2 (but the same problem on vista), latest bda drivers, cyberlink 7 or intervideo codecs, on a hp notebook with intel centrino 1.7ghz, 1gb ram and ati radeon mobility x600

Link to post

So what is your signal level? You can check that by clicking into the status bar (where 'Time' is displayed) until the signal status (in %, colored green) shows up. Think all TT products report pretty accurate levels..

Link to post

Think you are watching the timeline rather than the signal status. What color does the signal indicator have? In case of 80% it must be green.

Link to post

There are two possible reasons for discontinuities:

 

1) Bad signal quality (which doesn't necessarily mean bad signal strength!). Try to use a better antenna / cable, or search a better place for your indoor antenna.

 

2) Something in your PC interferes with the device or driver and causes loss of data. Hard to pinpoint...

Link to post

BTW, is there a reason why DVBViewer does not show signal strength in dB also, and also a % signal quality indicator? AFAIK the interfaces exist for BDA. Is there a lack of support from manufactureres not feeding them with information? Would be easier to pinpoint signal problems then...

Edited by CiNcH
Link to post
Think you are watching the timeline rather than the signal status. What color does the signal indicator have? In case of 80% it must be green.

 

yes you're right, the signal is near 45% and it's green, what's the minimum for no discontinuities?

Link to post

BDA signal strength can be meaningless because every manufacturer handles it a different way (it is very rare to find a BDA DVB-t device which actually maps the dB strength to a percentage - Pinnacle are one exception to this rule). Even taking different products from the same manufacturer (e.g. Hauppauge), they report strength in different ways because the driver source comes with several different companies. Signal strength as reported by BDA drivers is usually basically the AGC gain level, but again it is very rare to see this mapped to the actual AGC range. In an ideal situation, the lowest AGC would be 100% and the highest AGC would be 0% and then each value in between spread out accordingly.

 

For example, a Nova-t-500 will report a strength of 54. The Nova-t PCI with the same signal will report say -33000. The HVR-900 may report the same signal as 25632. In all cases it is not a percentage because it is not on a scale of 0-100. DVBViewer can be a bit misleading now, because it will show the Nova-t-500 as having 54% strength, the Nova-t PCI as 0% strength and HVR-900 as 100% strength. Yet this is with the exactly the same signal. "Ah but the tuners are less sensitive" you might say, but again that is false, because they are not a percentage, and DVBViewer displays them as a percentage with no knowledge of the min/max values. Only the card makers know the min/max and convert it to a percentage IN THE DRIVER.

 

You really need to check signal quality, which should be >90% and ideally 100% but I don't think DVBViewer provides a way to check that. There is a free tool called ScanChannelsBDA which will let you check that.

Edited by CX23882-19
Link to post

Thought signal indicators were pretty well covered and standardized by BDA: IBDA_SignalStatistics Interface

 

IBDA_SignalStatistics::get_SignalLocked

The get_SignalLocked method retrieves a Boolean value indicating whether the signal is locked.

 

IBDA_SignalStatistics::get_SignalQuality

The get_SignalQuality method retrieves a value from 1 to 100 indicating the quality of the signal.

 

IBDA_SignalStatistics::get_SignalStrength

The get_SignalStrength method retrieves a value that indicates the strength of the signal in decibels.

Edited by CiNcH
Link to post

Oh come on. every driver/manufacturer has it's own standard there. They are covered yes, but one gives values between -20000 and-9000 one between 100 and 200 one between 100 and 0. It is as standarized as the CI and DiseqC handling. :rolleyes:

 

You have no idea how long it took to figure this stuff out.

 

There are precautions so the values can't go over 100 or below zero.

 

So you want to compare? let's compare. climb up to your SAT dish and turn it a little then you can compare the value before with the value after. That is the only valid comparismen you can do. Everything else is bogus.

Link to post

@ B1G,

 

try TT-Media Center. It also has a quality level indicator. A completely new TT software (TT-STB), which is not yet released, will also show SNR and error rate...

Link to post

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...