Audio & 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
Presence of noise.
5
Q
What makes a CTCSS squelch work?
A
Tones.
6
Q
What radio circuit samples analog signals, records and processes them as numbers, then converts them back to analog signals?
A
The digital signal processing circuit.
