Nuoptix Stereo Optical Recording System, Owner'S Manual

Page: 18 / 38

SIZE ADJUSTMENT
Record an 80% signal at 400Hz and develop the negative. Measure the total
recorded modulation as determined using the formula on the page titled “How to
Measure % Modulation” on the next page. If the measured modulation does not
equal 80%, do the following:
•
Connect a dB meter connected to the monitor output then adjust R144
•
Rotate the mode switch to the RECORD position.
•
Toggle the PEC/DIRECT switch to PEC.
•
Rotate the monitor level potentiometer to midrange (12 o'clock position)
•
Reading the db meter, adjust R144 to achieve the appropriate gain/loss
required.
db = 20 x log(80
÷
%modulation measured)
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