USRP X Series Quick Start (Daughterboard Installation)

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Application Note Number: AN-5501

Authors: John Smith and Jane Smith

Last Modified Date: 2016/04/15



This Quick Start is meant to show you how to put together your new X300/310. We will start at the point when you have yet to unpack the boxes and go all the way to being able to ping the device, performing a quick software probe to verify hardware components and finally running a simple FFT demo. This Quick Start does not cover the installation of software on the host computer.

Tools Required

  • Philips Screwdriver
  • 5/16” wrench

Pre-installed Software

Box Contents


  • 1 x USRP X300/X310
  • 1 x SFP Adapter for 1 GigE
  • 1 x Power Supply and US Cord
  • 1 x USB 2.0 JTAG Debug Cable
  • 1 x Gigabit Ethernet Cable
  • 4 x SMA-Bulkhead Cables
  • 16 x Daughterboard Screws

Daughterboard Boxes

  • 2 x SBX Daughterboards

Antenna Boxes

  • One or more Antennas



Proper Handling

Daughterboard installation and component verification (Ettus Research recommends you perform the installation with no power to the USRP and using ESD equipment)

Step 1

Unscrew the 2 screws on the top of the USRP and remove cover. (Lift up about 15 degrees and wiggle back as there is a flange on the front part of the cover)

[figure 3]

[figure 4]

[figure 5]

Step 2

Line up the 8 screw holes on the Daughterboard with the USRP Motherboard standoffs (they only go one way).

[figure 6]

[figure 7]

Step 3

After you have aligned the Daughterboard correctly you can press the Daughterboard on to the connectors below them (you will feel them snap into place).

[figure 8]

[figure 9]

Step 4

Put 8 of the screws provided in the daughterboard

[figure 10]

Step 5

Repeat steps 2- 4 for the second Daughterboard

Step 6

It is recommended to connect the bulkhead cables one at a time to avoid confusion. The Daughterboards and front panel of the X300/310 are clearly labeled as to which cable goes where.

[figure 11]

[figure 12]

[figure 13]

[figure 14]

[figure 15]

[figure 16]

Step 7

Repeat step 6 for the other bulkhead cables

[figure 17]

[figure 18]

Step 8

Install USRP cover with screws

[figure 19]

Step 9

Connect the SFP 1 GigE adapter into USRP SFP port 0

[figure 20]

[figure 21]

Step 10

Connect the Gigabit Ethernet cable and power cord provided

[figure 22]

Step 11

Attach any Antennas you may have purchased

[figure 23]

Step 12

On the computer(host) you plan to use to connect to the USRP set the Ethernet adapter to have an IP address of with a subnet mask of Connect the other end of the Gigabit Ethernet cable to your computer.

[figure 24]

Step 13

Power on the USRP (button on the front right of the USRP)

Step 14

Ping the device from host computer:

   $ ping

[figure 25]

Step 15

Assuming you have properly installed the UHD driver ( you can now run this command in a terminal/command window: $ uhd_usrp_probe. This will tell you about the hardware inside of your USRP. The output will look like the following:

insert uhd_usrp_probe output

Step 16

Try the UHD_FFT demo that comes with GNU Radio

1. Connect one antenna to RX2 on the left Daughterboard (Daughterboard A)

[figure 26]

2.From the terminal/command window:

   $ uhd_fft

[figure 27]

[figure 28]