how many cycles of a constant frequency sine wave are counted before one determines the frequency of the signal?
one cycle?
how about measuring the time it takes to go from 0 volts
to the first peak and multiplying the time by 4 to get the time for a complete cycle. the frequency is then the...
I understand that I can do a Fourier Transform on a waveform
in the time domain to identify frequency components which
can be combined to reconstruct the waveform in the time domain.
Now, say I have a component in the frequency domain at for example, 30 MHz.
If I excite the box that is...
Does anyone know of an aircraft that has two or more ac generators (alternators) that are operated in parallel?
That is, as opposed to each alternator feeding it's respective bus and then tying the busses together when one alternator fails.
Military or commerical, fixed wing or rotary wing...
I am on a program that has a vhf fm (30-88 MHz) antenna
installed on a helicopter on the vertical next to the
tail rotor and am experiencing a rotor modulation effect that causes an uneceptable amount of distortion.
any one have this experience and what can be done?
I have three coax cables between a radio and the antenna
with a connector at each end and two connectors in the middle.
I know the VSWR of each cable (from the spec sheet)
Each cable is 50 ohms
assuming a 50 ohm load at the antenna end,
how can I calculate the end to end VSWR?
each cable has a...
