hi,
when i read the class usrp_standard_tx of usrp_standard.h, i find there
is a function set_tx_freq() and tune
from the remark, i know that set_tx_freq() can set the frequcny of DUC
and it must be in the range [-44M,44M].
In openbts project, USPRdevice.cpp use set_tx_freq() to realize tune().
so i am puzzled. 1)negative freqency can’t be the center freqency of
real signal.2) the freqency range of DUC is very small. i believe i must
misunderstand something. i hope somebody can help me. thank you.
leo