Can you check (show/display) it by time series signal ?

Yes, this is 500-700Hz bp time series

Nice, and I have a very basic question. Did you subtract the BPC signals that were recoreded in other auxiliary channels from the main h(t)?? Or, just using the "known" BPC frequencies??

Unfortunately the BPC signals were not recorded in DQ channels. So I used "known BPC frequencies" sine function.

(Of course I checked the actual frequency value from h(t) data)