The Reference Desk/Easter Egg in "Day of the Moon"?

In "The Day of the Moon," there's a brief burst of Apollo-era digital audio when Canton injects the video clip of the Silence into the Apollo transmission. Surprisingly, Google doesn't show any information about this.

I've recently gotten into HAM digital modes, and identified the signal as Reversed RTTY (Radio TeleTYpe) with a mark tone of ~835Hz and a space tone shift of ~175Hz.

While the orchestral soundtrack covers up most of the signal, the beginning of the transmission clearly decodes as the word "YOU". Based on the length of the signal, my suspicion is that the SoundFX engineer who created it used the "YOU SHOULD KILL US ALL ON SIGHT" dialog rather than hunting for / licensing any Apollo-era computer sound libraries.

Any chance that someone else can confirm this?