PERIOD results for test signal (cos(0.6x) + noise):
 NOUT,JMAX,PROB=         180          38  2.7961655E-06
          33  0.5235988       1.084100    
          34  0.5394655      7.1715385E-02
          35  0.5553321       1.024075    
          36  0.5711988       6.057836    
          37  0.5870655       13.41375    
          38  0.6029321       17.28707    
          39  0.6187987       14.41372    
          40  0.6346654       7.609743    
          41  0.6505320       2.181840    
          42  0.6663986      0.2316588    
          43  0.6822653      2.7394535E-02