cxa2559q Sony Electronics, cxa2559q Datasheet - Page 12

• Manufacturer Part Number: cxa2559q
• Description: Playback Equalizer Amplifier With Music Sensor
• Manufacturer: Sony Electronics

Description of Operation
1. Signal route
The CXA2559Q signal circuit is shown in Fig. 1.
2. Gain adjustment method
Adjust the playback equalizer amplifier gain so that –6dBm is output on LINEOUT (Pins 7 and 24) by playing
back the reference tape for Dolby level adjustment.
By this adjustment, the output can be the same level as for the CXA2560Q and CXA2561Q which have the
built-in Dolby NR system.
Dolby level is defined as 200nWb/m measured according to the ANSI high efficiency head method.
Use the following reference tapes specified by Dolby Laboratories Licensing Corporation.
(dBm)
–10
–20
–30
–40
–50
–60
–70
–80
0
PBIN (HEAD)
PB IN
400Hz 200nWb/m: Dolby level reference tape
FWD
RVS
PBOUT
Fig. 2. Level diagram
VR adjustment
PBFB
AMP1
PBTC
300k
Fig. 1. Signal route block diagram
TAPEIN
7k/12k
–30dBm
PBOUT
MUTE OFF
MUTE OFF
LINEOUT
– 12 –
TAPEIN
(–30dBm)
–6dBm
(Dolby level)
100k
MUTE ON
MUTE ON
AMP2
24dB
VGS
VGS
List of Calibration Cassette Tape
1. A-bex Laboratories, Inc.
2. BASF (product code 09797 XE)
3. Kaneon Corp.
4. Standard Tape Laboratory
5. TEAC Corporation, Japan
6. TEAC Corporation of America
7. Victor Company of Japan, Ltd.
8. Sony Corporation (part no. TY-256)
(part no. TCC-130)
(LC Engineering part no. LCT-7001)
(catalogue no. 28)
(part no. MTT150)
(part no. MTT150)
(part no. TMT-6130, VTT-727)
LINEOUT
(–6dBm line amplifier
reference output level)
CXA2559Q