(CCWN76  81
                                        
5, Trigger the scope from the 100 Hz output of ICa, pin 12.
   Connect the vertical input to tho CCW filter output. Set
   the generator to lOOl,O Hz, RIL. The audio waveform on the
   scope should be a fairly smooth sinewave which drifts to the
   left at the rate of one cycle per second, The amplitude and
   shape of this waveform should not vary by more than about 10
   as it drifts.
   
6. Rotate S1 slowly through its ten positions. At each setting
   verify that the output signal viewed on the scope drifts
   in the same manner it does in step 5.