Intro:

    We have 2 N210 usrps. One with a sbx daughter board and a second with a wbx daughter board.
We are using the wbx daughter board to take  plasma line data for aeronomy (using juha's software).

Devices:

• Use uhd_find_devices to get devices
  
• use uhd_usrp_probe  --args addr=ipadr  to probe each device.
• Note: We are currently using the 2nd usrp with the wbx daughter board for plasma line observations.
  

usrp2/n210 specs

• external pps reference
• external 10Mhz reference
• fixed 100Mhz clock rate
• 100Ms/s dual adc.
  
• fpga:
• xilinx spartan 3a dsp 3400 fpga
• 2 rx DDC chains in fpga
• 16 bit and 8 bit sample modes (sc8 and sc16)
• Up to 25 Mhz or rf bandwidth with 16 bit samples
• Up to 50 Mhz of rf bandwidth with 8 bit samples
• LED'S:
• A: transmitting
• B: mimo cable link
• C: receiving
• D:firmware loaded
• E: reference lock
• F: cpld loaded
• Ref Clock 10Mhz
• usrp2: 5 to 15dbm
• N210: 0 to 15 dbm
• PPS:
  
• usrp2: 5V pp
• N210: 3.3 to 5V pp
• Only 1 daughter board slot.
• WBX Daugherboard
• 5db noise figure
  
• 2 quadratrure frontends (1 transmit, 1 rcv)
• Defaults to direct conversion.
• Can be used in low IF mode through lo_offset with uhd:tune_request_t
• receive lo. can be set to integer=N tuning for better spur performance.
• rcv antennas: tx/rx or rx2
• Bandwidth: 40 Mhz rx & tx
• SBX Daugtherboard
• 2 quadratrure frontends (1 transmit, 1 rcv)
• Defaults to direct conversion.
• Can be used in low IF mode through lo_offset with uhd:tune_request_t
• receive lo. can be set to integer=N tuning for better spur performance.
• rcv antennas: tx/rx or rx2
• Bandwidth: 40 Mhz rx & tx
• LEDs
• All flash when daughterboard is initialized
• TX LD: transmit synth lock detect
• TX/RX: receiver on Tx/Tx antenna port (no TX)
• RX ld:  receive synth lock detect
• RX1/RX2: receiver on RX2 antenna port
• Tuning
• usrp has 2   tuning stages:
• rf frontend goes rf to if (daughter board)
  
• DSP: goes IF to bandband (mother board)
• After tuning, check for lo's locked.. or wait for up to a second.
  

Documentation:

• USRP Hardware driver and USRP manual
  
• USRP N210 product details .. with list of daughteboards
  
• USRP N200/210 data sheet (.pdf)
• USRP2 motherboard schematic (.pdf)
  
• wbx daughterbaord
  
• schematics (.pdf)
• fe_schematic (.pdf)
• adl5387_datasheet (.pdf)  wbx mixer
• sbc daughterboard
• schematics (.pdf)
• adl5380 datasheet (.pdf)   sbx mixer
  

Measurements (in date order):

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