(F)Element 4-49 Audio and Squelch Circuits Flashcards
1
Q
What is the digital signal processing term for noise subtraction circuitry?
A
adaptive filtering and autocorrelation
2
Q
What is the purpose of de-emphasis in the receiver audio stage?
A
when coupled with the transmitter pre-emphasis, flat audio and noise reduction is received
3
Q
What makes a Digital Coded Squelch work?
A
digital codes
4
Q
what causes a squelch circuit to function
A
the presence of noise
5
Q
What makes CTCSS squelch work?
A
tones
6
Q
What radio circuit samples analog signals, records and proccess them as numbers, then converts them back into analog signals?
A
the digital signal processing circuit
