public SetFixedAzmSlewCommand(SlewRate rate, bool slewPositive)
 {
     _slewRate  = rate;
     _signValue = slewPositive ? FixedSlewPositive : FixedSlewNegative;
 }
 public void SetFixedDecSlew(SlewRate rate, bool slewPositive)
 {
     _serialPort.RunCommand(new SetFixedDecSlewCommand(rate, slewPositive));
 }