Changes between Version 14 and Version 15 of Hardware/rf-front-end


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Timestamp:
Apr 28, 2020, 11:10:57 PM (5 years ago)
Author:
msherman
Comment:

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  • Hardware/rf-front-end

    v14 v15  
    11[[TOC(hardware/Domains*, hardware/networking*, hardware/optical*, hardware/nodes*, hardware/sdr*, hardware/rf-front-end*, hardware/antennas*, hardware/fullduplex*, depth=3)]]
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    3 == RF Front End ==
     3=== RF Front End
    44
    55Each node has an RF front end situated between the USRPs and the antennas. This front end provides amplification, filtering, and other signal control functions. The diagram below shows a component level overview of the connections. Further details are provided in the following sections.
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    99[[BR]]
    10 === Transmit (TX) Chains ===
     10==== Transmit (TX) Chains
    1111There are 2 user configurable transmit (TX) chains connected to the USRPs. Each TX chain has a power amplifier (PA) providing +30 dB of gain across 2-8 GHz with a maximum output power of +30 dBm ([attachment:ZVE-8G+.pdf see datasheet for more details]). There are several bands available for the TX chains (prior approval required for use of certain bands). Currently only one band can be selected for use across both TX chains.
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    … …  
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    3131[[BR]]
    32 === Receive (RX) Chains ===
     32==== Receive (RX) Chains
    3333There are 2 receive (RX) chains connected to the USRPs at all times. No filtering is done on the RX chains, so any frequency can be monitored provided it is within the specifications of other system components (900 Mhz – 6 GHz for large node sector, 1.7-6 GHz for medium node). Only the connections to the USRP 2974 have [attachment:ZX60-83LN12+.pdf low-noise amplifiers] (LNA) connected due to the low maximum input power raing (-15 dBm) of the USRP N310 receive chains and the close proximity of the TX and RX antennas. All the RX2 ports of the USRPs are connected to the receive antennas as follows:
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