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Diffstat (limited to 'host/docs/dboards.dox')
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1 files changed, 28 insertions, 0 deletions
diff --git a/host/docs/dboards.dox b/host/docs/dboards.dox index 2ce6c4563..4f2b22825 100644 --- a/host/docs/dboards.dox +++ b/host/docs/dboards.dox @@ -101,6 +101,9 @@ Sensors: - **lo_locked**: boolean for LO lock state +Notes: +- When used in the X3x0, set the daughterboard clock rate to 100 MHz (see \ref config_devaddr) + \subsection dboards_rfx RFX Series The RFX Series boards have 2 quadrature frontends: Transmit and Receive. @@ -343,6 +346,12 @@ LEDs: - **TX/RX RXD**: Receiving on TX/RX antenna port - **RX2 RXD**: Receiving on RX2 antenna port + +Notes: +- When used in the X300/X310 at frequencies below 1 GHz, it is necessary to + reduce the daughterboard clock rate to 20 MHz to achieve phase + synchronization and best RF performance (see \ref config_devaddr). + \subsection dboards_tvrx TVRX The TVRX board has 1 real-mode frontend. It is operated at a low IF. @@ -384,10 +393,29 @@ Sensors: - **rssi**: float for measured RSSI in dBm - **temperature**: float for measured temperature in degC +Notes: + +- The TVRX2 requires a 64 MHz, 100 MHz or 200 MHz reference clock. On the X3x0, + set the daughterboard clock rate accordingly (see \ref config_devaddr), typically + to 100 MHz. + \subsection dboards_e300 E310 MIMO XCVR board Please refer to \ref e3x0_dboard_e310. + +\subsection dboards_clock_rate Daughterboard reference clock + +The USRP motherboard provides a reference clock to the daughterboards, which +the daughterboards will use to generate LO signals or anything else that +requires a reference clock. + +The X3x0 has a programmable reference clock, which might have to be changed +depending on various applications (see the daughterboard sections above). +However, it can provide only one daughterboard clock per device, which can +lead to conflicts. It might not be possible to use a specific daughterboard +together with all others. + \subsection dboards_dbsrxmod DBSRX - Modifying for other boards that USRP1 Due to different clocking capabilities, the DBSRX will require |