diff options
| -rw-r--r-- | host/docs/usrp_e3x0.dox | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/host/docs/usrp_e3x0.dox b/host/docs/usrp_e3x0.dox index f4c9df06c..7fab73f20 100644 --- a/host/docs/usrp_e3x0.dox +++ b/host/docs/usrp_e3x0.dox @@ -371,6 +371,95 @@ usrp->get_rx_sensor("lo-locked"); usrp->get_tx_sensor("lo-locked"); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +\subsubsection e3x0_dboard_e310_band_select Frontend Filter and Antenna Switches + +The transmit and receive filter banks uses switches to select between the available filters. These paths are +also dependent on the antenna switch settings. Incorrectly setting the switches generally results +in attenuated input / output power. Receive filters are band pass (series high & low pass filters), +transmit filters are low pass. + +Source code related to controlling the filter band and antenna switches resides in e300_impl.c. Specifically, refer to methods +`e300_impl::_update_bandsel`, `e300_impl::_update_atrs`, `e300_impl::_update_gpio`, and `e300_impl::_update_enables`. Generally, these +methods set the switches depending on the state of transmit and receive streams. + +The following sections provide switch setting tables for antenna and filter selection for frontends A & B receive and transmit paths. +For futher details refer to the schematics. + +\subsubsection e3x0_dboard_e310_frontend_a_switches Frontend Side A Filter and Antenna Switches + +_Note: X = don't care, T = If full duplex, set bits according to transmit table, otherwise don't care. +Filter range A – B will be selected if A <= freq < B._ + +__Receive__ +RX Port | RX Filter (MHz) | VCTXRX2_V1,V2 | VCRX2_V1,V2 | RX2_BANDSEL[2:0] | RX2B_BANDSEL[1:0] | RX2C_BANDSEL[1:0] +:-----: | :-------------: | :-----------: | :---------: | :--------------: | :---------------: | :---------------: +TRX-A | < 450 | 01 | 10 | 101 | XX | 01 +TRX-A | 450 – 700 | 01 | 10 | 011 | XX | 11 +TRX-A | 700 – 1200 | 01 | 10 | 001 | XX | 10 +TRX-A | 1200 – 1800 | 01 | 10 | 000 | 01 | XX +TRX-A | 1800 – 2350 | 01 | 10 | 010 | 11 | XX +TRX-A | 2350 – 2600 | 01 | 10 | 100 | 10 | XX +TRX-A | 2600 – 6000 | 01 | 01 | XXX | XX | XX +RX2-A | 70 – 450 | TT | 01 | 101 | XX | 01 +RX2-A | 450 – 700 | TT | 01 | 011 | XX | 11 +RX2-A | 700 – 1200 | TT | 01 | 001 | XX | 10 +RX2-A | 1200 – 1800 | TT | 01 | 000 | 01 | XX +RX2-A | 1800 – 2350 | TT | 01 | 010 | 11 | XX +RX2-A | 2350 – 2600 | TT | 01 | 100 | 10 | XX +RX2-A | >= 2600 | TT | 10 | XXX | XX | XX + +__Transmit__ +TX Port | TX Filter (MHz) | VCTXRX2_V1,V2 | TX_ENABLE2A,2B | TX_BANDSEL[2:0] +:-----: | :-------------: | :-----------: | :------------: | :-------------: +TRX-A | < 117.7 | 10 | 01 | 111 +TRX-A | 117.7 – 178.2 | 10 | 01 | 110 +TRX-A | 178.2 – 284.3 | 10 | 01 | 101 +TRX-A | 284.3 – 453.7 | 10 | 01 | 100 +TRX-A | 453.7 – 723.8 | 10 | 01 | 011 +TRX-A | 723.8 – 1154.9 | 10 | 01 | 010 +TRX-A | 1154.9 – 1842.6 | 10 | 01 | 001 +TRX-A | 1842.6 – 2940.0 | 10 | 01 | 000 +TRX-A | >= 2940.0 | 11 | 10 | XXX +_Note: Although the transmit filters are low pass, this table describes UHD's tuning range for selecting each filter path. +The table also includes the required transmit enable state._ + +\subsubsection e3x0_dboard_e310_frontend_b_switches Frontend Side B Filter and Antenna Switches + +_Note: X = don't care, T = If full duplex, set bits according to transmit table, otherwise don't care. +Filter range A – B will be selected if A <= freq < B._ + +__Receive__ +RX Port | RX Filter (MHz) | VCTXRX1_V1,V2 | VCRX1_V1,V2 | RX1_BANDSEL[2:0] | RX1B_BANDSEL[1:0] | RX1C_BANDSEL[1:0] +:-----: | :-------------: | :-----------: | :---------: | :--------------: | :---------------: | :---------------: +TRX-B | < 450 | 10 | 01 | 100 | XX | 10 +TRX-B | 450 – 700 | 10 | 01 | 010 | XX | 11 +TRX-B | 700 – 1200 | 10 | 01 | 000 | XX | 01 +TRX-B | 1200 – 1800 | 10 | 01 | 001 | 10 | XX +TRX-B | 1800 – 2350 | 10 | 01 | 011 | 11 | XX +TRX-B | 2350 – 2600 | 10 | 01 | 101 | 01 | XX +TRX-B | 2600 – 6000 | 10 | 10 | XXX | XX | XX +RX2-B | 70 – 450 | TT | 10 | 100 | XX | 10 +RX2-B | 450 – 700 | TT | 10 | 010 | XX | 11 +RX2-B | 700 – 1200 | TT | 10 | 000 | XX | 01 +RX2-B | 1200 – 1800 | TT | 10 | 001 | 10 | XX +RX2-B | 1800 – 2350 | TT | 10 | 011 | 11 | XX +RX2-B | 2350 – 2600 | TT | 10 | 101 | 01 | XX +RX2-B | >= 2600 | TT | 01 | XXX | XX | XX + +__Transmit__ +TX Port | TX Filter (MHz) | VCTXRX1_V1,V2 | TX_ENABLE1A,1B | TX1_BANDSEL[2:0] +:-----: | :-------------: | :-----------: | :------------: | :--------------: +TRX-B | < 117.7 | 00 | 01 | 111 +TRX-B | 117.7 – 178.2 | 00 | 01 | 110 +TRX-B | 178.2 – 284.3 | 00 | 01 | 101 +TRX-B | 284.3 – 453.7 | 00 | 01 | 100 +TRX-B | 453.7 – 723.8 | 00 | 01 | 011 +TRX-B | 723.8 – 1154.9 | 00 | 01 | 010 +TRX-B | 1154.9 – 1842.6 | 00 | 01 | 001 +TRX-B | 1842.6 – 2940.0 | 00 | 01 | 000 +TRX-B | >= 2940.0 | 11 | 10 | XXX +_Note: Although the transmit filters are low pass, the following table describes UHD's tuning range for selecting each filter path. +The table also includes the required transmit enable states._ \section e3x0_misc Miscellaneous |