On Thu, March 23, 2017 9:36 am, Nick Sayer via time-nuts wrote: > The splitters Iâm using do have a 200Ω load on them. I know this > because PA6H modules recognize an external antenna and use it.
I may have been thinking of a different receiver, according to the Thunderbolt manual I just checked, the antenna alarm should not "impair the operation" of the thunderbolt: Bit 1: When 1, indicates that the antenna input connection is open. More precisely, this bit indicates that the antenna input is not drawing sufficient current. Normally, the ThunderBolt provides power to the antennas LNA (Low Noise Amplifier) through the center conductor of the antenna cable. On-board circuitry senses this current draw, and if low, this condition will be indicated. However, when the antenna is powered elsewhere (e.g. when using a splitter) then an antenna open condition is expected and does not imply a fault nor does it impair the operation of the ThunderBolt. -- Chris Caudle _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.