It is a bit more complicated Giuseppe than that. You see there are systems which have active antennas (powered) for receiving. In such a system you can use the antenna bias to provide power to the active antenna elements (typically a filter bank and an LNA). Those are typically receive only systems. Systems that have a dedicated transmit port can "hard code" the bias-T on that port and switch on or off bias on the receive port. But if you only have one port there are times when you want the bias on all the time (operations with an active antenna) and times when you want it only during transmit (PTT / bias-t applications). A software option that lets you choose how it behaves is the best overall solution.
--Chuck On Wed, Jun 27, 2018 at 3:13 AM Giuseppe Marullo <giuse...@marullo.it> wrote: > > Or to put it differently, :-) If the HackRF would enable the ANT bias > > when it was transmitting then it would "just work" as they say. > Definitely I would vote for this. Maybe we could "link" the TX LED > signal with the BIAS using a little hw "bridge" so not to rely on any > sw change. > > Giuseppe Marullo > IW2JWW - JN45RQ > _______________________________________________ > HackRF-dev mailing list > HackRF-dev@greatscottgadgets.com > https://pairlist9.pair.net/mailman/listinfo/hackrf-dev >
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