========================================================================
UHD - USRP-B2x0 Series Device Manual
========================================================================

.. contents:: Table of Contents

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Comparative features list - B200
------------------------------------------------------------------------

**Hardware Capabilities:**
 * Integrated RF frontend (70 MHz - 6 GHz)
 * External PPS reference input
 * External 10 MHz reference input
 * Configurable clock rate
 * Internal GPSDO option
 * B210 Only:

   * MICTOR Debug Connector
   * JTAG Connector

**FPGA Capabilities:**
 * Timed commands in FPGA
 * Timed sampling in FPGA

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Specify a Non-standard Image
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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

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Changing the Master Clock Rate
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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.

The user can set the master clock rate through the usrp API call 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"

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RF Frontend Notes
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The B200 features and integrated RF frontend.

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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.

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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.

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Hardware Reference
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
LED Indicators
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Below is a table of the LED indicators and their meanings:

===============  ========================  ========================================================
Component ID     Description               Details
===============  ========================  ========================================================
 LED600          Power Indicator           | off = no power applied
                                           | red = power applied (external or USB)
 LED800          Channel 2 RX2 Activity    | off = no activity
                                           | 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 activity
                                           | 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.

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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
===============  ========================  ========================================================

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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
===============  ========================  ========================================================

\* B210 Only