cxa2511aq Sony Electronics, cxa2511aq Datasheet - Page 14

• Manufacturer Part Number: cxa2511aq
• Description: Dolby B-c Type Noise Reduction System With Playback Equalizer Amplifier
• Manufacturer: Sony Electronics

2. Adjustment method
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)
(dBm)
(dBm)
–10
–20
–30
–40
–50
–60
–70
–80
–10
–20
–30
–40
–50
–60
–70
–80
0
0
VR adjustment
PBIN (HEAD)
PBIN (HEAD)
400Hz 200nWb/m: Dolby level reference tape
400Hz 200nWb/m: Dolby level reference tape
Fig. 2-1. Level diagram (application circuit 1)
Fig. 2-2. Level diagram (application circuit 2)
PBOUT
PBOUT
VR adjustment
– 14 –
TAPEIN
TAPEIN
–30dBm
–30dBm
AUXIN
AUXIN
–30dBm
–30dBm
LINEOUT
LINEOUT
–6dBm
(Dolby level)
–6dBm
(Dolby level)
CXA2511AQ