For hdb and condo residents who receive their tv signals through the matv wall points (not starhub points), they are likely to be able to receive the T & T2 broadcast if they are receiving the analogue channels, U (chan 28), Octo (chan 30) and CNA (chan 32) now.
Why is this so?
Take a look at the sketch below which shows a highly simplified matv system using 3 filters for channels 28, 30 and 32. This means that the matv, on paper, will only be supplying signals for these 3 channels, signals on other channels are blocked.
However, passive filters as used in matv in real world do not have the high "selectivity" with U-shaped curve. Instead, it is more like a V-shaped curve as represented by the red line in the sketch below:
So, signals not too far away from the pass bands, ie chan 28, 30, and 32 will be able to come in, though at a reduced level.
If helped that T, and more so in T2, the design of the dvb system makes the signals extremely robust. Weak signals containing high error can still be successfully decoded to provide satisfactory digital tv reception.
That is the reason why matv could receive T broadcast which used chan 29 a few months ago. And for the same reason some matv are now receiving the new T2 broadcast using chans 27, 29 and 31.
Edit: amended links to sketches.
some even use a metal ruler can slide through and open... the thing is dun tampered the meter is illegal.. for the antenna.. is quite straightforward.. that tiem the SCV guy also tell me next time want to use back roof antenna just plug back...
