InterceptRadio.com Forums

This may sound Dumb but what is CSQ :!:

Carrier SQulech. No PL, DPL or Data required to open the rx'er. Just carrier

_________________
I generate Board Warnings

--------------------------------------------------------------------------------

It's a carrier with nothing "riding" on it like a tone.

A simple carrier squelch or noise squelch operates strictly on the signal strength of the signal, such as when a television mutes the audio or blanks the video on "empty" channels, or when a walkie talkie mutes the audio when no signal is present. In some designs, the squelch threshold is preset. For example, television squelch settings are usually preset. Receivers in base stations at remote mountain top sites are usually not adjustable remotely from the control point.
In devices such as radiotelephones (also known as two-way radios), the squelch threshold is set with an adjustable knob marked squelch. This setting adjusts the threshold at which signals will open the audio channel. Backing off the control will turn on the audio, and the operator will hear white noise if there is no signal present. The usual operation is to adjust the control until the channel just shuts off - then only a small threshold signal is needed to turn on the speaker. However, if a weak signal is annoying, the operator can adjust the squelch to open only when stronger signals are received.
A typical FM two-way radio carrier squelch circuit takes out the voice components of the receive audio by passing the detected audio through a high-pass filter. A typical filter might pass frequencies over 4,000 Hz (4 kHz). The squelch control adjusts the gain of an amplifier which varies the level of noise coming out of the filter. The audio output of the filter and amplifier is rectified and produces a DC voltage when noise is present. The presence of noise creates a DC voltage which turns the receiver audio off. When a signal with little or no noise is received, the voltage goes away and the receiver audio is unmuted. Some applications have the receiver tied to other equipment that uses the audio muting control voltage as a "signal present" indication.

_________________
President-in-Exile, Seattle Area Radio Communications And Scanner Traffic Intercept Crew (SARCASTIC)
Don't feel bad if you can't use your STD100/200; there are still people using Digital Frequency Search!
Bunnery definition for the under-fives

Thanks for the info ( Can't Believe all these Yrs I didn't Know that ) :beer: