Comtek systems are primarily organized into two frequency ranges, each with distinct characteristics and chart mappings: 216–217 MHz Series
The primary reason most professionals search for a "Comtek frequency chart" is to coordinate with or Sennheiser wireless microphones. comtek frequency chart
Step 2: Use a spectrum analyzer. (If you don't have one, a Comtek RSSI receiver in "scan mode" works, or a $300 RF Explorer). Step 3: Look at the noise floor. Comtek systems are primarily organized into two frequency