Changes between Version 2 and Version 3 of Hardware/rf-front-end


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Timestamp:
May 28, 2019, 6:41:48 PM (6 years ago)
Author:
jkol
Comment:

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  • Hardware/rf-front-end

    v2 v3  
    55[[Image(sub6 rf front end - pilot.png, 700px)]]
    66
     7[[BR]]
    78=== Transmit (TX) Chains ===
    89There 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 (see datasheet for more details). There are 4 selectable filter 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.
    … …  
    2122'''NOTE:''' USRP N310 ports RF2-TX and RF3-TX are not connected at all. They are 50 ohm terminated at the USRP and should not be used.
    2223
    23 === Receive (RX) chains ===
     24[[BR]]
     25=== Receive (RX) Chains ===
    2426There 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 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:
    2527