Changes between Version 26 and Version 27 of Hardware/bDomains/cSandboxes/dSB4


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Timestamp:
Oct 18, 2012, 3:09:18 PM (12 years ago)
Author:
seskar
Comment:

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  • Hardware/bDomains/cSandboxes/dSB4

    v26 v27  
    55As 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/AM52/bInstrumentation Instrumentation AM].
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    7   || [[Image(SB4.jpg, 600px, link=, align=center)]] || [[Image(IMG_0376.jpg, 200px)]] ||
     7  || [[Image(SB4.jpg, 600px, align=center)]] || [[Image(IMG_0376.jpg, 200px)]] ||
    88
    99As can be seen in figure 1, there are a total of nine (9) input/output ports on the transceiver test system. The first 8 input/output ports are connected to nodes 1 thru 8, respectively and the 9th input/output port is connect to the Wimax base station (BS).