/*! \page page_usrp_b200 USRP B2x0 Series \tableofcontents \section b200_features Comparative features list - B200/B210 - Hardware Capabilities: - Integrated RF frontend (70 MHz - 6 GHz) - External PPS reference input - External 10 MHz reference input - Configurable clock rate - Internal GPSDO option (see \subpage page_gpsdo_b2x0 for details) - B210 Only: - MICTOR Debug Connector - JTAG Connector - FPGA Capabilities: - Timed commands in FPGA - Timed sampling in FPGA \section b200_imgs Specify a Non-standard Image UHD software will automatically select the USRP B2X0 images from the installed images package. The image selection can be overridden with the `fpga` and `fw` device address parameters. Example device address string representations to specify non-standard images: fpga=usrp_b200_fpga.bin -- OR -- fw=usrp_b200_fw.hex \section b200_mcr Changing the Master Clock Rate 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 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: 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. \subsection b200_fe_tuning Frontend tuning The RF frontend has individually tunable receive and transmit chains. On the B200, there is one transmit and one receive RF frontend. On the B210, both transmit and receive can be used in a MIMO configuration. For the MIMO case, both receive frontends share the RX LO, and both transmit frontends share the TX LO. Each LO is tunable between 50 MHz and 6 GHz. \subsection b200_fe_gain Frontend gain All frontends have individual analog gain controls. The receive frontends have 73 dB of available gain; and the transmit frontends have 89.5 dB of available gain. Gain settings are application specific, but it is recommended that users consider using at least half of the available gain to get reasonable dynamic range. \section Hardware Reference \subsection LED Indicators Below is a table of the LED indicators and their meanings:
Component IDDescriptionDetails
LED600 Power Indicator off = no power applied
red = power applied (external or USB)
LED800 Channel 2 RX2 Activity off = no power applied
green = receiving
LED801 Channel 2 TX/RX Activity off = no activity
green = receiving
red = transmitting
orange = switching between transmitting and receiving
LED802 Channel 1 TX/RX Activity off = no activity green = receiving
red = transmitting
orange = switching between transmitting and receiving
LED803 Channel 1 RX2 Activity off = no power applied
green = receiving
LED100 GPS lock indicator off = no lock
green = lock
TX LED indicators are on when transimitting data and off when no samples are available to transmit. RX LED indicators are on when sending samples to the host and off when unable to do so. This means that TX/RX activity LED indicators will blink off in a temporary transmit underflow or receive overflow condition, indicating that the host is not sending or receiving samples fast enough. The host will be notified of the condition and output a "U" or "O" as well. \subsection External Connections Below is a table showing the external connections and respective power information:
Component ID Description Details
J601 External Power 6 V
3 A
J701 USB Connector USB 3.0
J104 External PPS Input 1.8 V - 5 V
J101 GPS Antenna GPSDO will supply nominal voltage to antenna.
J100 External 10 MHz Input +15 dBm max
J800 RF B: TX/RX TX power +20dBm max
RX power -15dBm max
J802 RF B: RX2 RX power -15dBm max
J803 RF A: RX2 RX power -15dBm max
J801 RF A: TX/RX TX power +20dBm max
RX power -15dBm max
\subsection b200_switches On-Board Connectors and Switches Below is a table showing the on-board connectors and switches: Component ID | Description | Details --------------|----------------------------|---------------------------------------------------------- J502* | Mictor Connector | Interface to FPGA for I/O and inspection. J503* | JTAG Header | Interface to FPGA for programming and debugging. S700 | FX3 Hard Reset Switch | - */ // vim:ft=doxygen: