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| -rw-r--r-- | host/docs/usrp_n3xx.dox | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/host/docs/usrp_n3xx.dox b/host/docs/usrp_n3xx.dox index 4b045d86d..194766d68 100644 --- a/host/docs/usrp_n3xx.dox +++ b/host/docs/usrp_n3xx.dox @@ -386,6 +386,36 @@ For a list of which arguments can be passed into make(), see Section tx_lo_source | Initialize the source for the TX LO. | N310 | tx_lo_source=external rfic_digital_loopback | Digital data loopback inside the RFIC. | N310 | rfic_digital_loopback=1 +\subsection n3xx_usage_subdevspec Subdev Specifications + +The four RF ports on the front panel correspond to the following subdev +specifications: + +Label | Subdev Spec +------|------------ +RF0 | A:0 +RF1 | A:1 +RF2 | B:0 (N310 only) +RF3 | B:1 (N310 only) + +Note: Before UHD 3.12.0.0, the subdev spec options were different (A:0, B:0, +etc.). Make sure to update your application if you migrated from an earlier UHD +version. + +The following example will map RF0 onto channel 0 of a uhd::usrp::multi_usrp +object, and RF3 onto channel 1: + +~~~~~{.cpp} +auto usrp = uhd::usrp::multi_usrp("type=n3xx"); +usrp->set_rx_subdev_spec("A:0 B:1"); +// This line will now set the gain for RF3 to 20.0: +usrp->set_rx_gain(20.0, 1); +// And this will affect RF0: +usrp->set_rx_gain(20.0, 0); +~~~~~ + +See also uhd::usrp::subdev_spec_t. + \subsection n3xx_usage_sensors The sensor API \section n3xx_rasm Remote Management |