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authorThomas Tsou <tom@tsou.cc>2014-02-13 15:09:00 -0500
committerThomas Tsou <tom@tsou.cc>2014-03-03 23:17:57 -0500
commit3ebc772dc211ad9c506e413683f66d833fd7e0da (patch)
tree5301484a1e2d77c6a47895c3fa8ed5a6ea69049e /GSM
parent18d3b833bce36c543993852ab1b59724f8a60ece (diff)
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>
Diffstat (limited to 'GSM')
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