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Diffstat (limited to 'host/docs')
| -rw-r--r-- | host/docs/dboards.dox | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/host/docs/dboards.dox b/host/docs/dboards.dox index 0cb559061..5993501c9 100644 --- a/host/docs/dboards.dox +++ b/host/docs/dboards.dox @@ -11,13 +11,29 @@ of each board as well. \subsection dboards_basicrx Basic RX and LFRX -The Basic RX and LFRX boards have 4 frontends: +The Basic RX and LFRX boards have four modes of operation: - **Frontend A:** real signal on antenna RXA - **Frontend B:** real signal on antenna RXB - **Frontend AB:** quadrature frontend using both antennas (IQ) - **Frontend BA:** quadrature frontend using both antennas (QI) +The way in which you select the mode depends on the USRP type. On the X310, +selecting the mode is done using the antenna API: + +```cpp +auto usrp = uhd::usrp::multi_usrp::make("type=x300"); +usrp->set_rx_antenna("A"); // Disable RXB port +``` + +On the USRP2, the N200 series, the B100 series, the E100, and the USRP1 the mode +depends on the subdev spec applied: + +```cpp +auto usrp = uhd::usrp::multi_usrp::make("type=usrp2"); +usrp->set_rx_subdev_spec("A:A"); // Disable RXB port +``` + The boards have no tunable elements or programmable gains. Through the magic of aliasing, you can down-convert signals greater than the Nyquist rate of the ADC. |