Anritsu 680 C Series, Maintenance Manual

Page: 50 / 317

FUNCTIONAL RF DECK
DESCRIPTION ASSEMBLIES
690XXB/691XXB MM 2-21
F M
M A I N
B I A S
M o d u l a t o r
C o n t r o l
S w i t c h
C o n t r o l
> + 1 7 d B m
5 0 0 M H z
D o w n C o n v e r t e r A s s y .
D 2 7 3 3 0
> + 4 d B m
0 . 0 1 - 8 . 4 G H z
( 0 . 0 0 0 0 1 - 8 . 4 G H z
w i t h O p t i o n 2 2 )
S t e p
A t t e n u a t o r
( O p t i o n )
D i r e c t i o n a l
C o u p l e r
C o n t r o l
3 . 3 G H z L P F
5 . 5 G H z L P F
8 . 4 G H z L P F
1 3 . 5 G H z L P F
L e v e l
C o n t r o l
6 . 5 1 - 8 . 5 G H z
J 5
J 2
J 3
L P F
6 . 5 G H z
J 3
J 1
S a m p l e r
( - 7 t o - 1 4 d B m
t y p i c a l )
J 6
J 2
L e v e l
C o n t r o l
R F O u t p u t
J 1
2 - 8 . 4 G H z
Y I G O s c i l l a t o r
S w i t c h e d F i l t e r A s s y . - D 4 5 1 9 4 ( S t a n d a r d )
- D 4 5 1 9 8 ( O p t i o n 1 5 A )
0 . 0 1 - 2 G H z
> + 1 6 d B m
8.5
G
H
z L
P
F
> + 1 5 d B m ( S t d . )
2 0 G H z L P F
> + 2 0 d B m ( O p t . 1 5 A )
D i p l e x e r
2 9 8 6 0
D i p l e x e r
4 6 5 0 4
R F P a t h w i t h O p t i o n 2 2
0 . 0 0 0 0 1 - 2 G H z
0 . 0 1 - 1 0 M H z
L o s s A - C < 2 d B
L o s s B - C < 2 d B
A
B
C
L o s s A - C < 1 . 5 d B
L o s s B - C < 1 . 5 d B
A
B
C
A 1 3
D D S
( O p t i o n 2 2 )
C o n t r o l
C o n t r o l
> + 1 5 d B m
R F P a t h
w i t h
O p t i o n 2 2
NOTE
If the Electronic Step Attenuator (Option 2E) is installed,
the 0.01 to 10 MHz signal (Option 22) is inserted at the
Step Attenuator. Diplexers (P/Ns 29860 and 46504) are
not required.
Figure 2-4. Block Diagram of the RF Deck Assembly for
Model 69017B/69117B.