What does full quieting mean in ham radio?

The term “full quieting” in ham radio usually signifies a good quality signal on a repeater or FM transmission – it means that your signal is clear, free of static, and easliy readable by others.

What does a closed repeater mean?

closed repeater— a repeater whose access is limited to a select group (see open repeater). control operator — the Amateur Radio operator who is designated to “control” the operation of the repeater, as required by FCC regulations.

Is repeater a full duplex?

Repeaters operate in full duplex mode, because they receive and transmit at the same time. The repeater user is usually operating in half duplex, using two frequencies but switching between transmit and receive.

What is a half duplex repeater?

To use a repeater a user station must use a different transmit frequency than receive frequency. This is a form of duplex, or two frequency operation. It is known as half-duplex as you do not receive and transmit at the same time but normally use the push-to-talk button on your microphone to switch between the two.

Why do hams say 73?

73 is an old telegraph code that means “best regards”. 73, as well as 88 (which means “hugs and kisses”) are part of the language of ham radio.

What does 5 and 9 mean in ham radio?

For example, a signal of “5 9” means that the phone signal is Readability 5, and Strength 9; a perfectly readable and extremely strong signal. The term “S-9” is also used to report a Strength 9 for an extremely strong signal.

Can anyone use a ham repeater?

Do you need a license to use Amateur (Ham) radio? Yes — if you want to transmit over the Ham radio frequencies. Anyone can buy Ham radio equipment and listen to whatever signals they can receive. Those signals are floating through the air anyway, and it’s harmless to listen in.

What does DTMF mean in ham radio?

Dual tone multi-frequency (DTMF) is the sounds or tones generated by a telephone when the numbers are pressed. These tones are transmitted with the voice channel. DTMF is used to control automated equipment and signal user intent, such as the number they wish to dial. Each key has two tones at specific frequencies.

What is a simplex repeater?

A type of system known as a simplex repeater uses a single transceiver and a short-duration voice recorder, which records whatever the receiver picks up for a set length of time (usually 30 seconds or less), then plays back the recording over the transmitter on the same frequency. A common name is a “parrot” repeater.

Do police radios use repeaters?

Most police radio systems are run on P25, which is a digital mode. This can boost range by 25\% due to efficient data handling. P25 also requires infrastructure, for example, repeaters, base stations, internet tunnels. Most radio systems are configured with repeaters, which boost the signal of the officer or car.

What does QRZ mean in ham radio?

Who is calling me?
QRZ is amateur radio code also known as a Q code for “Who is calling me?”. This matches the purpose of the site, which is to assist the lookup of radio call signs.