Amateur Extra Class: 2020–2024
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E2B11:

What is the function of the Vertical Interval Signaling (VIS) code sent as part of an SSTV transmission?

  1. To lock the color burst oscillator in color SSTV images
  2. To identify the SSTV mode being used
  3. To provide vertical synchronization
  4. To identify the call sign of the station transmitting
E2B01 E2B02 E2B03 E2B04 E2B05 E2B06 E2B07 E2B08 E2B09 E2B10 E2B11 E2B12