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(9) Adjustment of Tracking Gain
@
Adjust it in the same condition as to focus gain in
the state of all the servos are operated by pushing
I] PAUSE
Button
except the measuring equip-
ment connections.
Audio
oscillator should
be connected
while the
servo is in operation.
If the connection is made before servo operation,
causing mis-operation.
If the connection
is made
in failure, disconnect
oscillator, push stop button ( = STOP) to stop all
operations, and follow the steps from the begin-
ning. Then push the pause button ( j]| PAUSE) to
activate the servo operation again.
Connection of measuring equipment.
Connect all kinds of measuring equipment setting
to each Test Points of TP101 as below figures.
TEOX
Pin @) of TP-101
TEL
Pin © of TP-101 0
GND
Pin ©) of TP-1010
* TEO:
Track
Error Out
TEI:
Track Error In
@) Adjustment
@
Set the output of audio oscillator to 2.1 kHz
3 Vp-p + 0.1 V.
:
®
Select oscilloscope input at X-Y mode so to ob-
serve
Lissajous
waveform.
(Select
DC
range
both X and Y inputs.)
@
Adjust VR-104 and obtain Lissajous waveform
symmetric to both X and Y axes.
The wave-
form is the same as focus gain adjustment.
Frequency
Counter
=a
Oscilloscope
Audio Oscillator
Set to 2.1 kHz, 3Vp-p
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