Yaesu FT-902DM Instruction Manual page 36
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COUNTER UNIT ( PB-2086A-3 4 3 0 /PB-2098)
The local oscillator signal is applied to Large- Scale
I n tegrate d Circuit ( L S I) chip for display on the
front p anel digital display.
The premix signal as shown in Table 2 from the
LOCAL Unit , is amplifie d by
signal is further ampli fi e d by
d eliver ed to the
L S I
20RS).
A portion o f t h e ou tput from
Q 3 o 0 4
amplified by
2
Q 3 0 0 1
of
c ontrolling the gain of those amplifiers .
1 60 m
1 0 . 4875 - 1 0 . 9875 ( M H z )
80 m
1 2 . 4875 - 1 2 . 9875
4om
1 5 . 98 7 5 - 1 6 . 4875
30m
1 8 . 987 5 - 1 9 . 4875
2om
2 2 . 9875 - 2 3 . 4875
1 7 m
2 6 . 9875 - 2 7 . 4875
1 5 m
2 9 . 9875 - 30 . 4875
1 2 m
3 3 . 4875 - 3 3 . 9875
A
!Om
3 6 . 9875 - 3 7 . 4875
\
B
I
10 m
3 7 . 4875 - 37 . 9875
C
lOm
37 . 9875 - 38 . 4875
D
l O m
3 8 . 4875 - 38 . 9875
Q 3 o o i .
Th e amplifie d
Q ::i o o 3 ( 2 S C 1 674) and
counter c h i p ,
Q::i o 1 2 ( M SM 9 5
Q 3 0 0 3
and fe d to gate
( 2 SC 1 8 1 5Y)
N o m i n a l
P r e m i x
L o c a l
F r eq u e n c y
1 0 . 486 - 1 0 . 986 ( M H z )
1 2 . 486 - 1 2 . 986
1 5 . 986 - 1 6 . 486
2 9 . 986 - 3 0 . 486
3 3 . 486 - 3 3 . 986
3 6 . 986 - 3 7 . 486
3 7 . 486 - 3 7 . 986
3 7 . 986 - 38 . 486
3 8 . 486 - 38 . 986
H P 50 8 2
7 6 2 3 1 6
-
The output from the LSI is fed to the display . Th e
output from pins 2 4 through
segment d rivers
digit d rivers
dynamic drive c onfiguration . Display is perfo rm e d
b y
D29 0 1 -D2 9 0 6 ( H P 5 082-7623) ,
light-emitting diodes.
is
L
B
S
U
1 0 . 489 - 1 0 . 989 ( M H z )
1 2 . 48 9 - 1 2 . 989
1 5 . 989 - 1 6 . 489
1 8 . 989- 1 9 . 489
2 2 . 989 - 2 3 . 489
26 . 98 9 - 2 7 . 489
2 9 . 9 8 9 - 3 0 . 489
33 . 489 - 33 . 989
36 . 989- 3 7 . 489
3 7 . 489 - 37 . 989
37 . 989 - 38 . 489
38 . 489 - 38 . 989
Table 2
D I S P L A Y U N I T
- 34- -
3 0
i s delivered t o
Q 3 0 1 3 -Q 3 0 1 9
( 2SA9 5 2 L)
Q 3 0 0 6 -Q 3 0 1 1 ( 2SA9 5 2L)
B
C W ,
S
1 0 . 4883 - 1 2 . 988 3 ( M H z )
1 2 . 4883 - 1 2 . 9883
1 5 . 9883 - 1 6 . 4883
1 8 . 9883 - 1 9 . 4883
22 . 9883 - 23 . 4883
26 . 9883 - 2 7 . 4883
29 . 9883 - 30 . 4883
33 . 4883 - 33 . 9883
37 . 9883 - 38 . 4883
38 . 4883 - 3 8 . 9883
P B -2 0 S B (N0. 2 9 · )
and
through a
seven-se gm e n t
A M
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