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Those beeps before and after each voice transmission are called Quindar tones. The reason for these tones was to, essentially, mute and unmute the dedicated phone lines that connected the transmission receiving stations to Mission Control in Houston. Because the phone lines were dedicated the noise between Houston and the capsule would have been constant, annoying and distracting the astronauts. Therefor the Quindar tones were built in.
Two tones were used in the Quindar system, named after its manufacturer, both being pure sine waves that were 250ms long. The "intro tone" was generated at 2,525 Hz and signaled the "key down" keypress of the PTT button. The "outro tone" was slightly lower at 2,475 Hz and signaled the release of the PTT button. The tones were generated by special equipment located at Mission Control, and they were decoded by detectors located at the various tracking stations.
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How were messages sent from Apollo 11?
Via radio transmission.
WHAT was the beep on NASA Apollo radio for?
The Quindar tones were there because of the button the astronauts had to press made that noise. The noise was there just to indicate that the microphone was being turned on/ off. And Hustons microphone didnt require a beep as it was an open line
How did people communicate with Apollo 11?
The three astronauts communicated back to the earth with the help of the radio.
What was the Apollo 11 shuttle called?
First of Apollo 11 was not a Shuttle craft, as it mot at all reusable. It is called the apollo 11 after the other Apollo starting with Apollo 7.
Who invented Apollo 11?
Apollo 11 was invented by N.A.S.A.
How were messages sent from Apollo 11?
Via radio transmission.
WHAT was the beep on NASA Apollo radio for?
The Quindar tones were there because of the button the astronauts had to press made that noise. The noise was there just to indicate that the microphone was being turned on/ off. And Hustons microphone didnt require a beep as it was an open line
What is 2-11 beep?
2-11 beep = -9
How did people communicate with Apollo 11?
The three astronauts communicated back to the earth with the help of the radio.
What was the Apollo 11 mission called?
Apollo 11
Is Apollo 11 haunted?
No Apollo 11 was not haunted.
Why was Apollo 11 called Apollo 11?
Apollo 11 was named after the Apollo program, which aimed to land a person on the Moon and bring them safely back to Earth. The number 11 designates that it was the eleventh mission in the Apollo program's series of lunar missions.
What was the Apollo 11 shuttle called?
First of Apollo 11 was not a Shuttle craft, as it mot at all reusable. It is called the apollo 11 after the other Apollo starting with Apollo 7.
What was Apollo 11's spaceship named?
Apollo 11
Who launched Apollo 11?
N.A.S.A launched Apollo 11.
Who invented Apollo 11?
Apollo 11 was invented by N.A.S.A.
What colors was the Apollo 11?
Apollo 11 colors was silver.
