  SCAN SQUELCH

  This feature will adjust the scan squelch value that the radio uses when
  the mode select switch is in the scan position. Scan Squelch values range
  from 0, for Open Squelch, to 15, for Tight Squelch.  Values may be entered
  directly with the Numeric Keys, or scrolled through with the Up/Down Arrow
  Keys.  NOTE: The mode select switch should be in the Carrier Squelch
  position when adjusting the Scan Squelch.
