HP 3585A, Service Manual

Page: 196 / 277

4 1 11 H z
IF GAIN
BUFFER
Scans by
=>
ARTEK
NED�
@ 2003-2005
- -
3:5
11 H z
T P 3
I I
I
I
F I R S T
1 0 0 . 3 5 11 H z
I1IXER
/\
1 0 0 . 3 5 11Hz
TO
1 4 0 . 3 5
11 H z
7 9 . 6 S I1 Hz
!
- -
F
C
O
N
D
I1 I X E R
I
BUFFER
S E C O N D
I1 I X E R
3 0 KHz
LOCAL OSCILLATOR
(AZl}
O , 4 , S , 1 2 dB
9 0 11 H z
(A2 1 }
A S
T
H I RD I1 I X E R
1 0 . 3 5 11 H z 9 . 6 5 11 H z
/\ 1
T H I RD
I1 I X E R 3 5 0 K H z
1 0 11 H z
(A2 1 }
BUFFE
R
A 1 9
I F F I L T E R
No2
2
LC
F I
LTER
S
.1F STEP
1 6 d B
O , 4 , B , l l d B
OVERDRIVE
ATTENUATOR
l , 3 , 1 0 KHz
V
TO
.1
2.
XTAL
--l
I TO
V
F I
LTER
S CONVERTOR
3 ·3 0 0H2
CONVERTOR
-
FIL T ER
REFERENCE T P l
I
VlDEO
T P 3
BII
L
-;
D C
OFFSET
DIA
FROM
dB/ D I V
AMPLI F I ER
T P S
ATTENUATOR
SIII TCH
CONTROL
BUFFER
r - - - - - - - - l
,
Xl '
VIDEO
P EAK
DETECTOR
CONVERTER
SAMPLE
AND
HOLD
liD
( M S }
�
_ _
_ _
'
_ _
AID
TO
1 1 0
CONVERTER
( M S }
3 0 KHz
- _.
---
OUTPUT
BUFFER OVERDRIVE
l L
C
LIMI TER
F I L T E R S
l , 3 , l O K H z
SlIl TCH
CONTROL
V TO
I
CONVERTER
l
XTAL
FILTERS
3 - 3 0 0H2
!
TO
V
CONVERTER
Figure 6-3 . RF/IF Block Diagram
6- 1 1 /6- 1 2