Akai AA-R22/L

PLL data values for received frequencies are as follows.
!
Received frequency
Band
Tuning l step
FM
87.4~ 108.1 MHz 50/100 kHz
MW
1
530 ~ 1610 kHz IO kHz
MW
2
522 ~ 1611 kHz
9 kHz
LW
137 ~ 362 kHz
1/9 kHz
MODE data values are as follows.
Band
Tuning 1 step
Mode data
FM
100 kHz
4
FM
50kHz
5
MW
1
lOkHz 3
MW
2
9 kHz 2
LW
I kHz
0
Fig. 1-37 Mode Data
The PLL data and
MODE data are received in the
following way and added to A to
Dor TC9125P.
Example:
FM 108MHz (I00kHz steps) received:
PLL data= (108 + 10.7) x IO 1187
MODE
data= 4
The each figure
of PLL data is converted into binary
code
of 4 bits (A = LSB, D = .MSB).
The MODE data is converted into binary code of
3 bits (A = LSB, C = MSB, D = 0).
In order to determine to which latch in TC9 l 25 the
above data should
be set, the data that designates
the address
is input first.
The address
is determined in the following manner.
Latch
:1
x I Place
I
xl0 Place
I
x 100 Place
Address
ii
F = 11
i
F = 12
F
= 13
F I· A+ 2· B + 4·C + 8· D (A, B, C, D = I or 0)
If F=ll is set, F=lxl+2xl+4x0+8xl=ll, and
A, B, C and D will be 1, 1, 0, and I respectively. Each
PLL
data
IF frequency
981~ 1188
10.7
MHz
99 ~ 208
460 kHz
109
~ 230
459 kHz
596
~ 821
459 kHz
Fig. 1-36 PLL Data
xl0OO Place
Mode cleate
F
= 14 F = 15
Fig. 1-38 Address Data
------------SERVICE MANUAL AA·R22/L, AA-R32/L, AA·R42------------
26