Frequently Asked Questions (FAQs) about octoBox Testbed
A: Yes, please see it here: Documentation
A: Yes, please see it here: Rest API
A: Please see slides 25-27 in the octoBox presentation below, and watch the video by following the link on slide 25. The MU-MIMO content starts at 6 minutes 10 seconds into the video.
The Pal can be your partner device for MU testing, vastly simplifying the testbed. The Pal can be a station or an AP.
A: Please review this slide for some examples and diagrams:
A: Please review this short PowerPoint for some tips:
A: octoBox is a small stackable semi-anechoic testbed used for testing wireless devices and systems, including phones, access points, sensors and other such devices. It isolates the devices under test from the outside interference and creates a stable environment for achieving repeatable measurements.
Inside the octoBox testbed you can emulate real life conditions, including path loss, multipath and interference.
The building blocks of the testbed include the octoBox small anechoic chambers, the MPE (multipath emulator) module, quadAtten programmable attenuator module and iGen interference generator module.
A: Engineers most often use octoBox to measure throughput of the new 802.11ac or LTE MIMO devices.
octoBox testbed can also be configured for mesh testing (self-forming, self-healing functions of a mesh), high speed roaming and other wireless tests.
A: octoBox is used for testing Wi-Fi, 2G/3G/LTE, Bluetooth GPS and other devices.
It offers ideal conditions for multi-stream MIMO throughput and supports the operating frequencies from 700 MHz to 6 GHz.
A: Yes. Each octoBox comes equipped with 8 RF ports (SMA or N-connector). Typically 4 of the 8 ports are used for 4x4 MIMO signal. The other 4 ports can be used to inject interference or for monitoring.
For example, you can use 2 of the RF ports to inject traffic interference on the adjacent channels, one of the ports to inject co-channel interference and the remaining port for interference waveforms emulating other common sources of interference, such as radar, wireless phones, baby monitors, etc.
The octoBox iGen module serves to provide programmable sources of traffic and waveform interference.
A: You can capture traffic using a Wireshark sniffer and replay it inside the octoBox using the iGen module.
A: Multipath emulator uses long RF cables to emulate multipath reflections in a typical house. Instead of bouncing from wall to wall, the signal bounces between a discontinuity and the shorted end of the cable. The MPE implements the IEEE standard 802.11 models of a typical house (model B) and of a typical office (model C).
A: We recommend the octoBox High Gain log-periodic antennas, OBS-14.
A: octoBox quadAtten modules are digitally programmable solid state attenuators. Each of the 4 attenuators in a module can be independently programmed via USB or Ethernet.
The attenuator modules are completely isolated from external interference with all copper cables (power, USB and Ethernet) entering the module through filters.
A: The attenuator frequency range of near DC to 6 GHz covers most of the wireless services of interest, including 2G/3G/4G, Bluetooth and dual band Wi-Fi. The attenuation range of 0 to 63 dB with 0.5 dB steps provides an accurate and broad sweep of the receiver dynamic range down to the lowest levels.
Q: You mentioned that attenuators have filtered Ethernet and USB ports. Why is it important to filter data and control interfaces?
A: Any copper wires, such as power, Ethernet, USB, HDMI, etc. can act as antennas coupling interference between the outside and the test environment. Any copper cables entering octoBox are coupled through filters.
Power and ventilation are also filtered. Vents are made of honeycomb waveguide structure to provide isolation at the frequencies of operation.
A: The throughput test automation software controls the turntable, attenuators and traffic generation between devices in the testbed and produces and Excel based plot that engineers can easily manipulate.
A: Yes – multi-chamber stackable testbeds can be constructed to emulate multi-room homes, mesh networks and high mobility multi-node robotic networks. The stackable extensible octoBox architecture has been optimized for constructing large testbeds.
A: Sure, please take a look here:
- 5Ghz downlink throughput comparison
- 5Ghz uplink throughput comparison
- 2.4Ghz downlink throughput comparison
- 2.4Ghz uplink comparison
A: Call Support!
octoScope recommends that you contact our support team if you need to do a firmware update of a quadAtten device.
Failure to update the firmware properly could render the device inoperable.
The latest version of the quadAtten firmware can be found here, and you'll need a windows machine:
And these are the instructions:
A: The iGen supports the "Short Pulse Radar Test Waveforms", as described in section 6.1 of the FCC document:
"COMPLIANCE MEASUREMENT PROCEDURES FOR UNLICENSED-NATIONAL INFORMATION INFRASTRUCTURE DEVICES OPERATING IN THE 5250-5350 MHz AND 5470-5725 MHz BANDS INCORPORATING DYNAMIC FREQUENCY SELECTION", from May 15, 2015.
For your convenience, you can download this document here: https://www.dropbox.com/s/rzhs361oite3mfd/FCC_DFS.pdf?dl=0
Each Radar Type specifies a range of possible acceptable parameters.
Below are the values we chose for our implementation:
|FCC RADAR Type||Pulse Width (μsec)||PRI (μsec)||Number of Pulses|
Each pulse pattern above is generated once per second in a continuous loop.