Transceiver52M: Enable B210 dual channel support
The main difference between existing UmTRX dual channel is the
single LO on B210 transmit and receive front-ends vs. independent
tuning paths. In order to support dual-ARFCN frequencies, baseband
offset conversion must be applied by tuning the FPGA CORDIC for
each channel. For B210, the following tuning order is applied.
1. If the new frequency of channel A is within the baseband range
of channel B, then retune both channels with the RF centered
and equal valued positive and negative baseband shifts.
2. If the new frequency of channel A is not with the baseband range
of channel B, then retune channel A directly (without manual
applied offset). Channel B will no longer be tuned to the
previous frequency.
Signed-off-by: Thomas Tsou <tom@tsou.cc>
1 file changed