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3DE-7886R
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Ill. Operating Specifications
1. A-BEX TCD-721 (6th track - 1.2mm) : Scratch test disc
2. A-BEX TCD-782 : Signal test disc
A. RF Signai Level Measurement
The main beam of the returning light is received by the photodiode and the output voltage is obtained by current-voltage
conversion of A+B+C+D.
1. Block Diagram
Sample player
Oscilloscope
2. Measurement Method
(a). Connect the ground terminal of the oscilloscope VRO (TA2066F (1C2102), pin 20) and measure the RFO signa!
(of TA2ZO66F (102102), pin 21).
(b). Play the first track of the measurement disc A-BEX TCD-782.
(c). Read the peak-to-peak value of the waveform.
Specification:
1.2+0.3, -0.2V
* When the value is outside of the specification (i.e., not good), check TA2066F (1C2102) and the pick-up.
Measurements
B. Jitter Measurement
The standard deviation of the pulse width when a trigger is applied to the rising edge of the 3T component of the RF signal.
1. Block Diagram
Sample player
Jitter meter
2. Measurement Method
(a). Connect the ground terminal of the jitter meter to VRO (TA2066F (C2102), pin 20) and measure the RFO signal
(of TA2Z066F (C2102), pin 21).
(b). Play the first track of the measurement disc A-BEX TCD-782.
(c). Read the indicated value of the jitter meter.
Specification: 25nS or less
* When the' value is outside of the specification, check TA2066F (IC2102) and the pick-up.
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