FUNCTIONAL
FREQUENCY
DESCRIPTION
SYNTHESIS
2 6 . 8 4 M H z
V C X O
( L o o p O s c . # 3 )
D i g i t a l
S y n t h e s i z e r
F r e q u e n c y
S y n t h e s i z e r
1 1 9 0 - 1 5 9 0 M H z
V C O
( L o o p O s c . # 1 )
F i n e
L o o p
O s c i l l a t o r # 2
P h a s e /
F r e q u e n c y
D e t e c t o r
1 0 0 k H z
P h a s e E r r o r
P h a s e
E r r o r
P h a s e /
F r e q u e n c y
D e t e c t o r
2 . 5 - 5 M H z
P h a s e
E r r o r
1 0 M H z
A 5 F i n e L o o p
1 0 0 k H z
2 . 5 - 5 M H z
3 0 0 -
4 0 0 M H z
3 0 - 4 0 M H z
B L o o p
F r e q u e n c y
S y n t h e s i z e r
8 0 9 - 9 9 1 M H z
V C O
F M
M a i n
B i a s
2 0 2 . 5 -
9 9 0 M H z
A 4 C o a r s e L o o p
1 0 0 M H z
1 0 M H z
1 0 M H z
P h a s e /
F r e q u e n c y
D e t e c t o r
1 0 0 M H z
R e f e r e n c e
O s c i l l a t o r
1 0 0 M H z
A 3 R e f e r e n c e L o o p
1 0 M H z R E F I n
1 0 M H z
H i - S t a b i l i t y
X T A L O s c i l l a t o r
( O p t i o n a l )
S R D
S a m p l e r
P h a s e /
F r e q u e n c y
D e t e c t o r
2 0 2 . 5 - 9 9 0 M H z
A 7 Y I G L o o p
F M
Y I G L o o p E r r o r
F M I n
( F r o n t P a n e l o r
R e a r P a n e l )
B i a s
R e g u l a t o r s
S a m p l e d 2 - 2 0 G H z R F
P / O S w i t c h e d F i l t e r
Y I G - T u n e d
O s c i l l a t o r
2 - 2 0 G H z
M o d u l a t o r
C o n t o l
M a i n
C o i l
D r i v e r s
T u n e
( F r o m A 1 2 P C B )
+ 1 8 V G
D i v i d e r
C o n t r o l
R F O u t
÷ 1 0
÷ 1 0
÷ 1 0 0
÷ 1 0
A 1 1 F M
F M
A 1 4 Y I G , S D M D r i v e r
P h a s e
E r r o r
F M S w e e p
( F r o m A 1 2 P C B )
F M
C o i l
D r i v e r
L P F
F M
S w e e p
1 . 9 6 2 5 t o 2 0 . 0 4 G H z
H a r m o n i c s
÷ 1 2 8
÷ 1 2 8
3 0 - 4 0 M H z I F
3 0 - 4 0 M H z
P u l s e
P o w e r
S p l i t t e r
R F
S p l i t t e r
x 9
C L o o p
F r e q u e n c y
S y n t h e s i z e r
S a m p l e r
2 0 . 9 -
9 0 M H z
9 0 0 M H z
5 0 0 - 1 0 0 0 M H z
V C O
÷ 2
÷ 4
S a m p l e r
1 0 M H z
P h a s e
E r r o r
P h a s e
E r r o r
3 0 - 4 0 M H z
*
*
*
6 9 1 X X B M o d e l s O n l y
÷ 4
2 9 7 . 5 - 3 9 7 . 5 M H z
Figure 2-2. Block Diagram of the Frequency
Synthesis Subsystem
690XXB/691XXB MM
2-11
Summary of Contents for 680 C Series
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