Fostex B-16 - Page 35

Fig. 5.10
6) Depress the ZERO RTN button. (NOTE: Do not depress ZERO RTN directly
from F.F mode. Depress STOP and then ZERO RTN only after tape has stopped
completely, )
7) Adjust LOW R308 so that one cycle length of the square wave at test point
1 until tape comes to a complete stop is a minimum 10 ±0. 4msec.
8) Repeat above 4) 7) and adjust R308 until a minimum 10 +0.4msec. is
obtained. .
9) Reset the oscilloscope TIME/DIV to about 0.5msec to enable monitoring a
waveform of 2.5msec.
10) Put transport in F.FWD mode until counter reaches +40 'V +59S.