Technics ST-9038 User Manual

r
PART,II PLL
SYNTHESIZER
I
The whole
conf iguration is
as
follows:
422 586
422
586
422
Oof
B
74L576
"1"
"o"
Example:
Let's review the counting
operation
in
the variable
codes
for
96.3 MHz.
Since
the
code
of
96 MHz is added
to 861C
and that of 0.3 MHz isto
74LS192,The contents of
the scanning counter
are
[i100]
in
74LS192 and
[00001]
in
861C. Because
Q and
Õ
of
874LS76
are
"1"
and
"0"
respectively,
as obtained from
the
table
of
true
values,
t1100,]_13]
and
[00001
1
]-
I48l
are respectively
added
to 74LS1 92 and 861
C.
Thecountingoperationsareg-2-"+'l--@-+@*Ø*O*O-9-'8.......Thatis,four
extra
pulses
as
shown by the circled
numbers
are counted.
Therefore, the number
of
frequency
divisions
by the
variable
codes in
96.3
MHz isr484
obtained
by adding 4
and
'10
x 48
=
48O that
is the
number
of
frequency
divisions
by
74LS192and 861C.
Thus,
the frequency dividing
ratio ín
the ease of fixed
codes is always
1/586, and the
variable
codes vary in accordance
with the frequencies.
The
frequency
dividing ratios
are shown
in
the
following
table.
1-5-4 Programmable
Frequency dividing
ratio
fin vco
Fixed
code
Variable code
Programm
F. divid-
87.6
MHz
98.3
MHz
586
391
983
88.1
98.8
586 402
988
90.1
100.8
586
422
1 008
96.3
107.0 586
484 1 070
100.0
110.7
586
521 1 107
106.0
116.7 586
581
1167
107.9
118.6 586
600 1
186
o
&
t
I
*

Technics ST-9038 Specifications

General

Brand	Technics
Model	ST-9038
Category	Tuner
Language	English