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  1. ozaiobee

    IF selectivity

    In a heterodyne receiver, does the 1st IF stage has to be wider than the second stage? Basically in IF selectivity for receivers, are the IF stages require to be designed so that the stages are decreasing in bandwidth? If they don’t please explain why?
  2. ozaiobee

    Is video telemetry a subset of telemetry?

    If a band is allocated for telemetry, can video telemetry be considered under telemetry?
  3. ozaiobee

    Antenna dBi issue.

    Hi, it's my first time on the website. I know how an isotropic antenna works. I work in the certification business and I keep seeing 0 dBi gain antennas. (Whip, Beamwidth 360 horizontal and 45 vertical.) Is this possible? I thought it was: Beamwidth: H, 360 V, 90 Gain = 3 dBi...

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