Level: Extreme
Points: 500
Author: Ryan Best
Description:
**Questions:**
1. Signal or Noise?
2. Modulation?
3. Possible source?
**Possible answers for each question:**
1. Signal/Noise
2. OOK/QAM/FSK/ASK/FM/AM/SSB/None
3. HAM Apparatus/Emergency Services/Automated Equipment/Noise
*Hint: I've been listening for too long. I'm hearing voices in nothing!*
Note - the format for the flag is `ctf{answer 1-answer 2-answer 3}`. The answer to each question is separated by a dash (spaces are necessary for Q3).
Answers are case insensitive. Only 10 attempts allowed.
[sig4.wav]Flag - ctf{Signal-FM-Emergency Services}