Key Clicks & Chirps

  • When a carrier is interrupted, as in CW, a sharp interruption will cause sidebands which manifest as Key Clicks.  The rise time must be conditioned with a key click filter
  • If the frequency of the transmission varies instantaneously as the key is depressed this give a chirp-like sound, which occupies more bandwidth than necessary.  It is caused by poor power supply regulation or poor oscillator/buffer isolation/design