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291 lines
12 KiB
Text
291 lines
12 KiB
Text
/*! \page page_usrp_b200 USRP B2x0 Series
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\tableofcontents
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\section b200_features Comparative features list - B200/B210/B200mini
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- Hardware Capabilities:
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- Integrated RF frontend (70 MHz - 6 GHz)
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- External PPS reference input
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- External 10 MHz reference input
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- Configurable clock rate
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- Variable analog bandwidth (200 kHz - 56 MHz)
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- GPIO header
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- [B200/B210] Internal GPSDO option (see \subpage page_gpsdo_b2x0 for details)
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- [B210/B200mini] JTAG Connector
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- [B210] MICTOR Debug Connector
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- FPGA Capabilities:
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- Timed commands in FPGA
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- Timed sampling in FPGA
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\section b200_power Power
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In most cases, USB 3.0 bus power will be sufficient to power the device.
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If using USB 2.0 or a GPSDO, an external power supply or a cable designed
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to pull power from 2 USB ports (USB 3.0 dual A to micro-B or B) must be used.
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\section b200_imgs Specifying a Non-standard Image
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UHD software will automatically select the USRP B2X0 images from the
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installed images package. The image selection can be overridden with the
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`fpga` and `fw` device address parameters.
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Example device address string representations to specify non-standard
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images:
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fpga=usrp_b200_fpga.bin
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-- OR --
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fw=usrp_b200_fw.hex
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\section b200_mcr Changing the Master Clock Rate
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The master clock rate feeds the RF frontends and the DSP chains. Users
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may select non-default clock rates to achieve integer decimation rates or
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interpolations in the DSP chains. The clock rate can be set to any value
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between 5 MHz and 61.44 MHz (or 30.72 MHz for dual-channel mode).
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Note that rates above 56 MHz are possible, but not recommended.
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The user can set the master clock rate through the usrp API call
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uhd::usrp::multi_usrp::set_master_clock_rate(), or the clock rate can be set through the
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device arguments, which many applications take:
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uhd_usrp_probe --args="master_clock_rate=52e6"
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The property to control the master clock rate is a double value, called `tick_rate`.
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\subsection b200_auto_mcr Automatic Clock Rate Setting
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The default clock rate setting is to automatically set a clock rate
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depending on the requested sampling rate. The automatic clock rate selection
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is disabled when either `master_clock_rate` is given in the device initialization
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arguments, or when uhd::usrp::multi_usrp::set_master_clock_rate() is called.
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Note that the master clock rate must be an integer multiple of the sampling
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rate. If a master clock rate is chosen for which this condition does not
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hold, a warning will be displayed and a different sampling rate is used internally.
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Nevertheless, there are multiple valid values for the master clock rate
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for most sampling rates. The auto clock rate selection attempts to use
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the largest possible clock rate as to enable as many half-band filters
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as possible. Expert users might have cases where a more fine-grained
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control over the resampling stages is required, in which case manually
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selecting a master clock rate might be more suitable than the automatic
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rate.
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The property to dis- or enable the auto tick rate is a boolean value,
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`auto_tick_rate`.
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\section b200_fe RF Frontend Notes
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The B200 features an integrated RF frontend.
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\subsection b200_fe_tuning Frontend tuning
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The RF frontend has individually tunable receive and transmit chains. On
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the B200 and B200 mini, there is one transmit and one receive RF frontend. On the
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B210, both transmit and receive can be used in a MIMO configuration. For
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the MIMO case, both receive frontends share the RX LO, and both transmit
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frontends share the TX LO. Each LO is tunable between 50 MHz and 6 GHz.
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\subsection b200_fe_gain Frontend gain
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All frontends have individual analog gain controls. The receive
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frontends have 76 dB of available gain; and the transmit frontends have
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89.8 dB of available gain. Gain settings are application specific, but
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it is recommended that users consider using at least half of the
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available gain to get reasonable dynamic range.
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\subsection b200_fe_bw Frontend bandwidth
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The analog frontend has a seamlessly adjustable bandwidth of 200 kHz to 56 MHz.
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Generally, when requesting any possible master clock rate, UHD will
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automatically configure the analog filters to avoid any aliasing (RX) or
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out-of-band emissions whilst letting through the cleanest possible signal.
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If you, however, happen to have a very strong interferer within half the master
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clock rate of your RX LO frequency, you might want to reduce this analog
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bandwidth. You can do so by calling
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uhd::usrp::multi_usrp::set_rx_bandwidth(bw).
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The property to control the analog RX bandwidth is `bandwidth/value`.
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UHD will not allow you to set bandwidths larger than your current master clock
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rate.
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\section Hardware Reference
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\subsection LED Indicators
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Below is a table of the B200/B210 LED indicators and their meanings:
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<table>
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<tr>
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<th>Component ID</th><th>Description</th><th>Details</th>
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</tr>
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<tr>
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<td>LED600</td> <td>Power Indicator</td> <td>off = no power applied (before rev6, some rev6) / external power applied and not yet initialized (most rev6)<br>
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blue = USB power applied (before rev6) / power supplied (USB) OR power supplied (external) (rev6)<br/>
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red = external power applied (before rev6) / external power applied and device initialized (rev6)</td>
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</tr>
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<tr>
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<td>LED800</td> <td>Channel 2 RX2 Activity</td> <td>off = no power applied<br>
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green = receiving</td>
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</tr>
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<tr>
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<td>LED801</td> <td>Channel 2 TX/RX Activity</td> <td>off = no activity<br>
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green = receiving<br>
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red = transmitting<br>
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orange = switching between transmitting and receiving</td>
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</tr>
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<tr>
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<td>LED802</td> <td>Channel 1 TX/RX Activity</td> <td>off = no activity
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green = receiving<br>
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red = transmitting<br>
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orange = switching between transmitting and receiving</td>
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</tr>
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<tr>
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<td>LED803</td> <td>Channel 1 RX2 Activity</td> <td>off = no power applied<br>
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green = receiving</td>
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</tr>
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<tr>
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<td>LED100</td> <td>GPS lock indicator</td> <td>off = no lock<br>
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green = lock</td>
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</tr>
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</table>
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Below is a table of the B200mini LED indicators and their meanings:
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<table>
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<tr>
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<th>Component ID</th><th>Description</th><th>Details</th>
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</tr>
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<tr>
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<td>PWR LED</td> <td>Power Indicator</td> <td>off = no power applied<br>
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on = power applied (external or USB)</td>
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</tr>
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<tr>
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<td>TRX LED</td> <td>TX/RX Activity</td> <td>off = no activity<br>
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green = receiving<br>
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red = transmitting<br>
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orange = switching between transmitting and receiving</td>
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</tr>
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<tr>
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<td>RX2 LED</td> <td>RX2 Activity</td> <td>off = no activity<br>
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green = receiving</td>
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</tr>
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<tr>
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<td>S0 LED</td> <td>Reference Lock</td> <td>off = no activity
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green = locked</td>
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</tr>
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<tr>
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<td>S1 LED</td> <td>Reference Present</td> <td>off = reference level low or not present<br>
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green = reference level high</td>
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</tr>
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</table>
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TX LED indicators are on when transmitting data and off when no samples are
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available to transmit. RX LED indicators are on when sending samples to the
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host and off when unable to do so. This means that TX/RX activity LED
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indicators will blink off in a temporary transmit underflow or receive overflow
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condition, indicating that the host is not sending or receiving samples fast
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enough. The host will be notified of the condition and output a "U" or "O" as
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well.
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\subsection External Connections
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Below is a table showing the B200/B210 external connections and respective power information:
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<table>
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<tr>
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<th>Component ID</th> <th>Description</th> <th> Details</th>
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</tr>
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<tr>
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<td>J601</td> <td>External Power</td> <td>6 V<br>3 A</td>
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</tr>
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<tr>
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<td>J701</td> <td>USB Connector</td> <td>USB 3.0</td>
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</tr>
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<tr>
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<td>J104</td> <td>External PPS Input</td> <td>1.8 V - 5 V</td>
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</tr>
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<tr>
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<td>J101</td> <td>GPS Antenna</td> <td>GPSDO will supply nominal voltage to antenna.</td>
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</tr>
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<tr>
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<td>J100</td> <td>External 10 MHz Input</td> <td>+15 dBm max</td>
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</tr>
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<tr>
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<td>J800</td> <td>RF B: TX/RX</td> <td>TX power +20dBm max<br>
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RX power -15dBm max</td>
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</tr>
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<tr>
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<td>J802</td> <td>RF B: RX2</td> <td>RX power -15dBm max</td>
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</tr>
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<tr>
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<td>J803</td> <td>RF A: RX2</td> <td>RX power -15dBm max</td>
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</tr>
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<tr>
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<td>J801</td> <td>RF A: TX/RX</td> <td>TX power +20dBm max<br>
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RX power -15dBm max</td>
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</tr>
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</table>
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Below is a table showing the B200mini external connections and respective power information:
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<table>
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<tr>
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<th>Component ID</th> <th>Description</th> <th> Details</th>
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</tr>
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<tr>
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<td>USB3</td> <td>USB Connector</td> <td>USB 3.0</td>
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</tr>
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<tr>
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<td>J1</td> <td>TRX</td> <td>TX power +20dBm max<br>
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RX power -15dBm max</td>
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</tr>
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<tr>
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<td>J2</td> <td>RX2</td> <td>RX power -15dBm max</td>
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</tr>
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<tr>
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<td>J3</td> <td>External 10MHz/PPS Reference</td> <td>+15 dBm max</td>
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</tr>
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</table>
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\subsection b200_switches On-Board Connectors and Switches
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Below is a table showing the B200/B210 on-board connectors and switches:
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Component ID | Description | Details
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------------------------|----------------------------|---------------------------------------------------
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J502<sup>1</sup> | Mictor Connector | Interface to FPGA for I/O and inspection.
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J503<sup>1</sup> | JTAG Header | Interface to FPGA for programming and debugging.
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J504<sup>2</sup> | GPIO Header | Header connected to the FPGA for GPIO purposes.
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S700 | FX3 Hard Reset Switch | Resets the USB controller / System reset
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U100 | GPSDO socket | Interface to GPS disciplined reference oscillator
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<sup>1</sup> Only on the B210
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<sup>2</sup> Only since rev. 6 (green board). GPIO pinout is 1=GPIO_0, 2=GPIO_1, 3=GPIO_2, 4=GPIO_3, 5=GPIO_4, 6=GPIO_5, 7=GPIO_6, 8=GPIO_7, 9=GND, 10=GND
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Below is a table showing the B200mini on-board connectors and switches:
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Component ID | Description | Details
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------------------------|----------------------------|---------------------------------------------------
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J5 | JTAG Header | Interface to FPGA for programming and debugging.
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J6<sup>1</sup> | GPIO Header | Header connected to the FPGA for GPIO purposes.
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SW1 | FX3 Hard Reset Switch | Resets the USB controller / System reset
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<sup>1</sup> GPIO pinout is 1=3.3V, 2=GPIO_0, 3=GPIO_1, 4=GPIO_2, 5=GPIO_3, 6=GND, 7=3.3V, 8=GPIO_4, 9=GPIO_5, 10=GPIO_6, 11=GPIO_7, 12=GND
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\section b200_known_issues Known issues
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The B200 and B210 cannot support an external 10 MHz reference if a GPSDO is
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already present on the motherboard. If an external 10 MHz is to be used, the
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GPSDO needs to be physically removed from the device beforehand.
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*/
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// vim:ft=doxygen:
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