Technician Class: 2018–2022
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T1D03:

[97.211(b)] , [97.215(b)] , [97.113(a)(4)]

When is it permissible to transmit messages encoded to hide their meaning?

  1. Only during contests
  2. Only when operating mobile
  3. Only when transmitting control commands to space stations or radio control craft
  4. Only when frequencies above 1280 MHz are used
T1D01 T1D02 T1D03 T1D04 T1D05 T1D06 T1D07 T1D08 T1D09 T1D10 T1D11