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| -rw-r--r-- | host/docs/usrp2.rst | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/host/docs/usrp2.rst b/host/docs/usrp2.rst index 2eb3ee796..904005ce0 100644 --- a/host/docs/usrp2.rst +++ b/host/docs/usrp2.rst @@ -393,3 +393,20 @@ they can be queried through the API. * mimo_locked - clock reference locked over the MIMO cable * ref_locked - clock reference locked (internal/external) * gps_time - GPS seconds (available when GPSDO installed) + +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Multiple RX channels +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +There are two complete DDC chains in the FPGA. +In the single channel case, only one chain is ever used. +To receive from both channels, +the user must set the RX subdevice specification. +This hardware has only one daughterboard slot, +which has been aptly named slot "0". + +In the following example, a TVRX2 is installed. +Channel 0 is sourced from subdevice RX1, +channel 1 is sourced from subdevice RX2: +:: + + usrp->set_rx_subdev_spec("0:RX1 0:RX2"); |