Changes between Version 28 and Version 29 of Hardware/bDomains/cSandboxes/dSB4


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Timestamp:
Jan 10, 2013, 10:56:44 PM (12 years ago)
Author:
Ilya Chigirev
Comment:

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  • Hardware/bDomains/cSandboxes/dSB4

    v28 v29  
    11[[TOC(Hardware/gDomains*)]]
    22
    3 == SB4 ==
     3==== SB4 ====
    44
    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/bAM/mInstr Instrumentation AM].
     
    2222This configuration creates two distinct set of RF paths that are used to create various topologies.
    2323
    24 === Node to Node RF Path ===
     24===== Node to Node RF Path =====
    2525
    2626s12 parameters taken with Agilent ENA RF Network Analyzer E5070; instrument dynamic range of 110 dB limits the accuracy of large attenuation results.
     
    3131|| [[Image(S12-A-24.jpg, 250px)]] || [[Image(S12-A-25.jpg, 250px)]] || [[Image(S12-A-52.jpg, 250px)]] ||
    3232 
    33 === Node to WiMAX basestation RF Path ===
     33===== Node to WiMAX basestation RF Path =====
    3434
    3535[[Image(SB4-Equiv-WiMAX.jpg)]]
    3636
    3737[[Image(S12-B-25.jpg, 400px)]]
    38