diff options
Diffstat (limited to 'host/docs')
| -rw-r--r-- | host/docs/dboards.dox | 4 | ||||
| -rw-r--r-- | host/docs/usrp_b200.dox | 31 | ||||
| -rw-r--r-- | host/docs/usrp_e3x0.dox | 8 |
3 files changed, 36 insertions, 7 deletions
diff --git a/host/docs/dboards.dox b/host/docs/dboards.dox index 13f3ccadd..b38fa5ae1 100644 --- a/host/docs/dboards.dox +++ b/host/docs/dboards.dox @@ -331,6 +331,10 @@ Sensors: - **rssi**: float for measured RSSI in dBm - **temperature**: float for measured temperature in degC +\subsection dboards_e300 E310 MIMO XCVR board + +Please refer to \ref e3x0_dboard_e310. + \subsection dboards_dbsrxmod DBSRX - Modifying for other boards that USRP1 Due to different clocking capabilities, the DBSRX will require diff --git a/host/docs/usrp_b200.dox b/host/docs/usrp_b200.dox index 6ee2f3445..9d3550b98 100644 --- a/host/docs/usrp_b200.dox +++ b/host/docs/usrp_b200.dox @@ -36,15 +36,40 @@ images: The master clock rate feeds the RF frontends and the DSP chains. Users may select non-default clock rates to acheive integer decimations or -interpolations in the DSP chains. The default master clock rate defaults -to 32 MHz, but can be set to any rate between 5 MHz and 61.44 MHz. +interpolations in the DSP chains. The clock rate can be set to any value +between 5 MHz and 61.44 MHz (or 30.72 MHz for dual-channel mode). +Note that rates above 56 MHz are possible, but not recommended. The user can set the master clock rate through the usrp API call uhd::usrp::multi_usrp::set_master_clock_rate(), or the clock rate can be set through the -device arguments, which many applications take: : +device arguments, which many applications take: uhd_usrp_probe --args="master_clock_rate=52e6" +The property to control the master clock rate is a double value, called `tick_rate`. + +\subsection b200_auto_mcr Automatic Clock Rate Setting + +The default clock rate setting is to automatically set a clock rate +depending on the requested sampling rate. The automatic clock rate selection +is disabled when either `master_clock_rate` is given in the device initialization +arguments, or when uhd::usrp::multi_usrp::set_master_clock_rate() is called. + +Note that the master clock rate must be an integer multiple of the sampling +rate. If a master clock rate is chosen for which this condition does not +hold, a warning will be displayed and a different sampling rate is used internally. + +Nevertheless, there are multiple valid values for the master clock rate +for most sampling rates. The auto clock rate selection attempts to use +the largest possible clock rate as to enable as many half-band filters +as possible. Expert users might have cases where a more fine-grained +control over the resampling stages is required, in which case manually +selecting a master clock rate might be more suitable than the automatic +rate. + +The property to dis- or enable the auto tick rate is a boolean value, +`auto_tick_rate`. + \section b200_fe RF Frontend Notes The B200 features an integrated RF frontend. diff --git a/host/docs/usrp_e3x0.dox b/host/docs/usrp_e3x0.dox index 289ea3410..dd26e047e 100644 --- a/host/docs/usrp_e3x0.dox +++ b/host/docs/usrp_e3x0.dox @@ -132,7 +132,7 @@ which should return 'arm-oe-linux-gnueabi'. -# Setup your environment as described in \ref e3x0_sdk_usage -# Type the following in the build directory (assuming a build in host/build): - $ cmake -DCMAKE_TOOLCHAIN_FILE=<youruhdsrc>/host/cmake/Toolchains/oe-sdk_cross.cmake -DENABLE_E300 .. + $ cmake -DCMAKE_TOOLCHAIN_FILE=<youruhdsrc>/host/cmake/Toolchains/oe-sdk_cross.cmake -DENABLE_E300=On .. $ make \subsubsection e3x0_sdk_usage_gnuradio Building GNU Radio @@ -191,7 +191,7 @@ builds) $ bitbake gnuradio-dev-image \endcode -When this completes, the files needed to create the sd card are in +When this completes, the files needed to create the SD card are in `tmp-glibc/deploy/images/ettus-e300` -# Build the toolchain. @@ -395,7 +395,7 @@ usrp->set_rx_subdev_spec("A:A A:B"); The following sensors are available for the USRP-E Series motherboards; they can be queried through the API. -- **fe_locked** - rx / tx frontend pll locked +- **fe_locked** - rx / tx frontend PLL locked - **temp** - processor temperature value - **gps_time** and **gps_locked** sensors are added when the GPSDO is found @@ -490,7 +490,7 @@ by pinging the USRP and making sure the LEDs start to blink. - Communication -# How do I enable X forwarding so I can run X apps on the e3x0?\n - In the file `/etc/ssh/sshd_config`, unmcomment the line `#X11Forwarding no` + In the file `/etc/ssh/sshd_config`, uncomment the line `#X11Forwarding no` and change "no" to "yes". \section e3x0_apps Applications |