Akai AA-R22/L

6-3-5. Operation
By entering optional attenuation data from the
DATA, CLOCK or STROB tenninal, the internal
attenuator
is set. The data stream consists of 18 bits
as follows ..
1) VOLUME
4
5
6 7 8
9
If, for example, the data stream
000100001000011000
is input by the clock from
the data tenninal, the attenuation
will be -32dB.
2) TONE Control
10
II
12 13 14 15
16 17 18
Fig. 1-17 Data of Volume Control
I+ 6 I + 5 I + 4 I + 3 I + 2 I + I I O I -1 I -2 I -3 1-4 I -5 1-6 IL-CH I R-CH I CI CZ I CJ
2
3
4
5
6 7
8 9
If, for example, the data stream
000100000000011000
is input by the clock from
the data terminal, the position will be +3.
3) The data stream taken in
is synchronized with the
STROB signal to set the attenuator. (same for
VOLUME and TONE controls)
Example: Volume
IC
DATA
-16d8
-18dB
10 11 12 13
14 15
15 17 18
Fig. 1-18 Data of Tone Control
- 2 OdB .__ __ __,
-22d8
CLOCK _.....J1 .... m11 ...... 1111 ..... rn1 ...... un ..... 11 _ ...... 111 ..... 1111 ..... 1111 ...... 1111-1111_.....,,11-11111-mrn ...... 111-1111"'--11 __ __.jJ.U.1111=1111=1111=111LW.1111 __
STROB
CHANGE OF
ATTENUATOR
-16d8
-18d8
-20dB
-22d8
Fig. 1-19 Relation of Data and Attenuator
------------SERVICE MANUAL AA-R22/L, AA-R32/L, AA-R42------------
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