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| -rw-r--r-- | host/docs/configuration.dox | 2 | ||||
| -rw-r--r-- | host/docs/dboards.dox | 50 |
2 files changed, 31 insertions, 21 deletions
diff --git a/host/docs/configuration.dox b/host/docs/configuration.dox index 8216a59d0..e36390a34 100644 --- a/host/docs/configuration.dox +++ b/host/docs/configuration.dox @@ -51,7 +51,7 @@ Ex: The subdev spec markup string to select a WBX on slot B. B:0 -Ex: The subdev spec markup string to select a BasicRX on slot B. +Ex: The subdev spec markup string to select a BasicRX on slot B (on USRP2/N200 devices only). B:AB diff --git a/host/docs/dboards.dox b/host/docs/dboards.dox index e8ee4a8ca..e12a7daff 100644 --- a/host/docs/dboards.dox +++ b/host/docs/dboards.dox @@ -13,17 +13,27 @@ of each board as well. 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) +- **Antenna Mode A:** real signal from antenna RXA +- **Antenna Mode B:** real signal from antenna RXB +- **Antenna Mode AB:** complex signal using both antennas (IQ) +- **Antenna Mode BA:** complex signal 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: +The way in which you select the mode depends on the USRP type. + +The X300 series will create subdevices 0 and 1 for each BasicRX or LFRX board. +The default is to make a channel for each subdevice. That can be controlled by +setting the subdev spec: + +```cpp +auto usrp = uhd::usrp::multi_usrp::make("type=x300"); +usrp->set_rx_subdev_spec("A:1"); // Only 1 channel using subdevice 1 on Radio A +``` + +The antenna mode is selected for each channel using the antenna API: ```cpp auto usrp = uhd::usrp::multi_usrp::make("type=x300"); -usrp->set_rx_antenna("A"); // Disable RXB port +usrp->set_rx_antenna("A", 0); // Disable RXB port on channel 0 ``` On the USRP2, the N200 series, the B100 series, the E100, and the USRP1 the mode @@ -40,22 +50,22 @@ rate of the ADC. BasicRX Bandwidth: -- **For Real-Mode (A or B frontend)**: 250 MHz -- **For Complex (AB or BA frontend)**: 500 MHz +- **For Real-Mode (Antenna Mode A or B)**: 250 MHz +- **For Complex (Antenna Mode AB or BA)**: 500 MHz LFRX Bandwidth: -- **For Real-Mode (A or B frontend)**: 33 MHz -- **For Complex (AB or BA frontend)**: 66 MHz +- **For Real-Mode (Antenna Mode A or B)**: 33 MHz +- **For Complex (Antenna Mode AB or BA)**: 66 MHz \subsection dboards_basictx Basic TX and LFTX -The Basic TX and LFTX boards have 4 frontends: +The Basic TX and LFTX boards have 4 modes of operation: -- **Frontend A:** real signal on antenna TXA -- **Frontend B:** real signal on antenna TXB -- **Frontend AB:** quadrature frontend using both antennas (IQ) -- **Frontend BA:** quadrature frontend using both antennas (QI) +- **Antenna Mode A:** real signal from antenna TXA +- **Antenna Mode B:** real signal from antenna TXB +- **Antenna Mode AB:** complex signal using both antennas (IQ) +- **Antenna Mode BA:** complex signal using both antennas (QI) The boards have no tunable elements or programmable gains. Through the magic of aliasing, you can up-convert signals greater than the Nyquist @@ -63,13 +73,13 @@ rate of the DAC. BasicTX Bandwidth: -- **For Real-Mode (A or B frontend**): 250 MHz -- **For Complex (AB or BA frontend)**: 500 MHz +- **For Real-Mode (Antenna Mode A or B**): 250 MHz +- **For Complex (Antenna Mode AB or BA)**: 500 MHz LFTX Bandwidth: -- **For Real-Mode (A or B frontend)**: 33 MHz -- **For Complex (AB or BA frontend)**: 66 MHz +- **For Real-Mode (Antenna Mode A or B)**: 33 MHz +- **For Complex (Antenna Mode AB or BA)**: 66 MHz \subsection dboards_dbsrx DBSRX |