KWorld Global TV 7131 - channel scan issue

[ontherocks]

I have a KWorld Global TV 7131 internal TV tuner card.
The problem is, it doesn't scan all the channels. At the most I get 37 channels.
I tried a lot of softwares. All of them behave similarly. I guess it s a problem with the WDM driver.
Anybody heard about any such issues?

Also, what would be the difference in picture quality between a TV Box and a TV Tuner (external or internal)?

 

[The_Falcon]

I guess the issue is - the cable TV is transmitted on the S-Band as well as the normal VHF/UHF bands cannot accommodate a lot of channels by themselves. Your card might not be tuning those channels on S-Band...but only VHF/UHF ones.

See here for frequency range: Television Frequency Table

 

[ontherocks]

That was the first thing I checked.
It does scan all the frequency ranges. I can see all the 100+ channels on my TV but the TV tuner card is not able to catch them. I think the TV tuner card is not storing the channels it deems poor quality, which the regular TV is catching.
The picture quality is better in the TV for the same channels as compared to the TV tuner card. (poor quality = grainy and what not)

Here is the list of scanned channels. It starts scanning from 4000000 Hz (40 MHz) to 865000000 Hz (865 MHz) with a step of 0.25 MHz.

Channel 1 is set to 48250000 Hz
Channel 2 is set to 55250000 Hz
Channel 3 is set to 62250000 Hz
Channel 4 is set to 69250000 Hz
Channel 5 is set to 76250000 Hz
Channel 6 is set to 83250000 Hz
Channel 7 is set to 112250000 Hz
Channel 8 is set to 119250000 Hz
Channel 9 is set to 126250000 Hz
Channel 10 is set to 133250000 Hz
Channel 11 is set to 140250000 Hz
Channel 12 is set to 147250000 Hz
Channel 13 is set to 154250000 Hz
Channel 14 is set to 161250000 Hz
Channel 15 is set to 168250000 Hz
Channel 16 is set to 175250000 Hz
Channel 17 is set to 182250000 Hz
Channel 18 is set to 189250000 Hz
Channel 19 is set to 196250000 Hz
Channel 20 is set to 203250000 Hz
Channel 21 is set to 210250000 Hz
Channel 22 is set to 224250000 Hz
Channel 23 is set to 231250000 Hz
Channel 24 is set to 252250000 Hz
Channel 25 is set to 259250000 Hz
Channel 26 is set to 266250000 Hz
Channel 27 is set to 273250000 Hz
Channel 28 is set to 280250000 Hz
Channel 29 is set to 287250000 Hz
Channel 30 is set to 294250000 Hz
Channel 31 is set to 303250000 Hz
Channel 32 is set to 535250000 Hz

Thats all.

 

[The_Falcon]

Yes this could be the issue. My Samsung 29" CRT scans and stores all channels...but my neighbour's Sony doesnt...it does shows those Chanels while scanning but never stores them.

 

[ontherocks]

Exactly.
Sometimes I can see the some channels while in Auto Scan, but it skips them thinking them as poor quality ones.
Tested it today with a different external TV tuner. Same problem.
So I guess the problem lies in the cable itself.