On Tue, May 29, 2018 at 4:30 PM Arv Evans <arvid.evans@...> wrote:
Rogier
Have you ever tuned across a steady carrier with a CW receiver and listened to the tone
as it starts high (difference between the two signals), then goes lower as you get closer to
the same frequency, and then goes back higher as you move to a higher difference between
signal frequencies?? Near the center of this tuning range the difference signal will go lower
and lower until it becomes less than 1 Hz.? If your receiver has an S-meter you can probably
see the meter waving back and forth at a few tenths of Hz difference.? Continue fine tuning to
minimize this slow frequency difference and you will find a place where there is no difference
between LO+/- BFO and received signal.? That is "Zero-Beat".? I guess the term "zero" means "no beat note"...maybe...?
Hope that helps.
Sometimes us ancient old geezers assume that newer hams already know all the radio language.
Arv? K7HKL _._
On Tue, May 29, 2018 at 4:14 PM kj6etl <pa1zz@...> wrote:
Ok this might be the most newbie queastion in the century but I am not sure what Farhan means in the Tune-Up instructions to calibrate the uBitx to "zero-beat" on a known AM station. Doest this mean turning for best sound? No sound? A 1000rz tone? Seriously what is this "zero beat" on an AM broadcast station supposed to sound like ?-)
