Changes between Version 4 and Version 5 of Internal/SB4


Ignore:
Timestamp:
05/08/14 21:36:46 (5 years ago)
Author:
seskar
Comment:

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  • Internal/SB4

    v4 v5  
    55SB4 is an ORBIT sandbox that is intended to support medium size experiments
    66with up to 9 nodes with tightly controlled topologies. The single Atheros device
    7 in each node is connected to the 9 inputs of([[http://www.jfwindustries.com/ JWF]]) 50PMA-012 RF
     7in each node is connected to the 9 inputs of([http://www.jfwindustries.com/ JWF]) 50PMA-012 RF
    88matrix switch. This switch, with its programmable attenuators, enables creation of 36 possible
    99RF paths between the nodes and thus facilitates creation of large number of topologies in which
    1010nodes can be organized. Each of the 36 attenuators can be set to a maximum of 63 dB of attenuation.
    1111In order to achieve good isolation
    12 between the RF devices in the nodes as well as given the physical proximity to the main grid which would result in interference, each of the SB4
    13 nodes is stored in [[http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=STE2300 Ramsey Electronics STE2300 shielded enclosure]] which provide up to 80 dB of isolation.
     12between the RF devices in the nodes as well as given the physical proximity to the main grid which would result in interference, each of the SB4 nodes is stored in [http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=STE2300 Ramsey Electronics STE2300 shielded enclosure] which provide up to 80 dB of isolation.
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