Changes between Version 30 and Version 31 of Hardware/bDomains/cSandboxes/dSB4


Ignore:
Timestamp:
Jan 11, 2013, 2:09:35 AM (11 years ago)
Author:
Ilya Chigirev
Comment:

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  • Hardware/bDomains/cSandboxes/dSB4

    v30 v31  
    1 [[TOC(Hardware, Hardware/bDomains, Hardware/bDomains/cSandboxes*, depth=5)]]
    2 
    31==== SB4 ====
     2[[TOC(Hardware, Hardware/bDomains, Hardware/bDomains/cSandboxes*, depth=6)]]
    43
    54As shown in Figure 1, sandbox 4 consists of 9 nodes and a WiMAX subsystem that consists of a basestation and a controller. To prevent interference, each node is housed in [http://www.ramseytest.com/ Ramsey Electronics RF enclosure] that provides 80 dB of isolation. There are  8 nodal wireless devices (with Atheros 5000X mini-PCI card and Intel 6250 mini-PCIe 802.11/802.16); these are connected to a power combiner and fed through the enclosure access port to the outside SMA connector which is wired to one of the input/output ports of the [http://www.jfwindustries.com/documents/50PMA-012_specsheet.pdf  RF Transceiver Test System] from [http://www.jfwindustries.com JFW Industries]. This configuration enables fairly tight control of RF attenuation matrix between the nodes. The topology is controlled through the [http://omf.mytestbed.net OMF] based [wiki:Software/bAM/mInstr Instrumentation AM].