CXA2510AQ Просмотр технического описания (PDF) - Sony Semiconductor

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производитель

CXA2510AQ

Dolby∗ B Type Noise Reduction System with Playback Equalizer Amplifier

Sony Semiconductor 

CXA2510AQ

2. Adjustment method

0

–10

–20

–30

–30dBm

–30dBm

–40

–50 VR adjustment

PBOUT

TAPEIN

AUXIN

–60

–70

400Hz 200nWb/m: Dolby level reference tape

–80

(dBm)

PBIN (HEAD)

Fig. 2-1. Level diagram (application circuit 1)

–6dBm

(Dolby level)

LINEOUT

0

–10

–20

–30

–40

–50

–60

–70

–80

(dBm)

PBOUT

VR adjustment

–30dBm

–30dBm

TAPEIN

AUXIN

–6dBm

(Dolby level)

LINEOUT

400Hz 200nWb/m: Dolby level reference tape

PBIN (HEAD)

Fig. 2-2. Level diagram (application circuit 2)

Adjust the playback equalizer amplifier gain so that –6dBm (Dolby level) is output on LINEOUT (Pins 7 and 24)

by playing back the reference tape for Dolby level adjustment.

Adjustment should be performed according to the rules of Dolby Laboratories Licensing Corporation because

this IC has the built-in Dolby NR system.

List of Calibration Cassette Tape

Dolby level is defined as 200nWb/m measured according to the ANSI high efficiency head method.

The followings are the reference tapes specified by Dolby Laboratories Licensing Corporation.

1. A-bex Laboratories, Inc. (part no. TCC-130)

2. BASF (product code 09797 XE)

3. Kaneon Corp. (LC Engineering part no. LCT-7001)

4. Standard Tape Laboratory (catalogue no. 28)

5. TEAC Corporation, Japan (part no. MTT150)

6. TEAC Corporation of America (part no. MTT150)

7. Victor Company of Japan, Ltd. (part no. TMT-6130, VTT-727)

8. Sony Corporation (part no. TY-256)

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