Fostex A-8 - Page 34

3) Allow the reel to slowly wind-in the scale.
4) Follow the spring scale travel with enough force to allow a steady reading
and multiply this value by the reel hub radius to calculate the torque.
5) The specified torque is 11.2 in-oz (320 g-cm) , ±20%.
6) If adjustment is required, adjust R129, 22KS7 pot, as required.
REAR VIEW
Fig. 6-11
4) Wow and flutter
Wow and flutter measurements should be undertaken only after studying the follow
ing items and determining which method and standard will be employed.
a) Determine whether the Reproduce Method, or the Record/Reproduce Method, is to
employed for measurement.
If the Reproduce Method is to be employed, a flutter test tape will be re 
quired.
Reco mm ended test tape; Fostex P/N 8266008000, Standard Tape Lab., #53-1 or
equivalent .
In the Record/Reproduce Method, a 3KHz sine wave is recorded on a blank tape,
rewound to beginning of the recording, and reproduced again for the measure 
ment process.
NOTE:
When reproducing the recorded signal at measurements by the Record/Reproduce
Method, adopt the maximum wow and flutter value obtained by repeated play and
stop modes of operation which is necessary to be sure that wow and flutter
content between record and reproduce will not be in phase to create a false
reading.
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