My box is dm900, when I zap to channels at 76.5E 11167v45000, picturing lag and not sound. But when I press pause button to timeshift, or streaming by laptop, cellphone..., all is well.
i don't know if it is a bug, but I can not find any result using google, so as to post it here.
the signal strength is good and I have tested a non-enigma2 STB that no lag and all is well. so I don't think this issue raised by antenna.