Nuoptix Stereo Optical Recording System, Руководство пользователя

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P.E.C. AMPLIFIER ADJUSTMENTS
Unplug the recording lamp from the back panel of the SROS. Rotate the
mode switch to the SETUP position and rotate the SETUP pot on the front panel
fully clockwise. Adjust PEC OFFSET pot (R182) so that the front panel meters
read zero. (Caution: The PEC offset can be effected if bright light is allowed to
fall on the visual track window. The window size has been reduced to minimize
the problem but still care should be exercised.) Reconnect the recording lamp
and set to the nominal recording lamp current. Adjust the the SETUP controls for
the proper slack ribbon spacing readings. Rotate the mode switch to BIAS and
adjust for a 1.5 mil bias line. Change to RECORD mode and adjust the input to
80% at 400 Hz. With the DIRECT/P.E.C. in the DIRECT position adjust the
MONITOR level control on the front panel for +10 dbm at TP15. Now toggle the
switch to the P.E.C. position and adjust PEC trimpots (R85) for +10 dbm. This
adjustment matches the direct and P.E.C. levels. Connect the input to the LEFT
channel only. Adjust XTK (R81) for minimum signal appearing at TP15 of the
right channel board. Connect the input to the RIGHT channel only and adjust
XTK (R81) for minimum signal appearing at TP15 of the left channel board. This
adjustment cancels any crosstalk that may have accumulated in the optical
system.
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