I am attempting to program a astro spectra to (Receive only Voice Traffic) on a specific channel using a standard PL Code. This particular channel will broadcast in Morse code the call sign about every 15 minutes. I am assuming that the PL code is usually not transmitted when the Morse code is transmitted. I have tried all three settings in the "RX Option" but the Morse code is still being received. Is there anyway to block out the Morse Code and still receive the voice traffic?