prof,
indeed there is a disagreement… but i hope you know who to trust 😉 i would always tell if i’m not sure about something…
… but here, i know *for sure* the BTS transmits dummy blocks on the BCCH carrier in downlink when there are no actual calls. that’s one of the reason why the bcch frequency needs a “cleaner” frequency planning. And that’s also a reason why BCCH frequency is the one which is NOT hopping in SFH hopping mode.
regards
pix