ei = get_energy()
if ei < 6.0:
    print "No rocking optimization for lower energy for 3rd harmonics rejection'
rock(th1)

#check beam position at EBOX and fbm if needed
time.sleep(2.0)

by = es_beam_posv.read()
if (abs(by) > 0.005):
    print by
    print 'Beam is not aligned at E-BOX BPM: do fbm.'
    run("fbm")