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6538-B- 796
A3
hp
Part
No. 00654-66503
NOTES
DC LEVELS WERE OBSERVED UNDER THE FOLLOWING CONDI-
TIONS:
A. 654A.
RANGE - X1OK
DIAL - 1
IMPEDANCE-75 UNBAL
OUTPUT LEVEL -+ 10 dBm
AMPLITUDE- SET FOR 0 ON METER.
B. ALL VOLTAGES +/- 10%.
C. VOLTAGES WERE
TAKEN WITH
AN - HP-
MODEL 3440A
DIGITAL VOLTMETER HAVING A 3443A PLUG-IN. HOWEVER,
ANY DC VOLTMETER WITH APPROXIMATELY 10 MEGOHMS
INPUT IMPEDANCE WILL YIELD ABOUT THE SAME RESULTS.
A2 SCHEMATIC
COMPONENT LOCATIONS
CI
C
CR
C
R
C
R
R
R
II
F3
26
DIO
41
B17
56
H5
71
Dll
86
Al5
12
F4
27
EIO
42
BI6
57
F6
72
Fl 1
87
B15
13
F5
E4
28
D12
43
C14
58
F6
73
H11
88
CI 5
14
F6
H5
29
F12
44
F2
C17
59
H6
74
E13
89
C16
15
F7
C6
D7
30
F12
45
E3
AI5
60
D7
75
E13
90
AIS
16
F9
E4
E7
31
C12
46
113
CI5
61
E7
76
DI4
91
L14
17
K8
E4
D9
32
E12
47
E3
62
E9
77
E14
18
DIO
L6
E9
33
J11
48
113
63
H7
78
1110
19
FIO
H6
JI0
34
.11
49
E4
64
K8
79
K9
20
CI I
E8
J9
35
KI
50
H4
65
K9
80
- --
21
Fl 1
F8
BI 7
36
FIO
51
C6
66
C9
81
C13
22
J10
K8
CI7
37
-- -
52
- - -
67
H9
82
C14
23
J9
118
B14
38
C16
53
16
68
DIO
83
C15
24
C15
K9
39
- --
54
J4
69
EIO
84
B14
25
B15
E9
40
B16
55
F5
70
CII
85
B15
A
D
E
H
+31 V
I
¡
Pb 42
2
3
OSCILLATOR AND OUTPUT (00654-66502)
FROM
BUFFER
10
AMPLIFIER
'
1
'I «'
1C34
;O. 01
+31
V
+31V
26V
26V
0.01
4
1
5
1
6
OV
DC
R44 499
R51 2K
•
le
1
71
-1
. ...-
-.0- AI,- - 49- - 49- - 41--49-..
49,-
- -4Ie- - 4 9- • AI- 4110- 49
41-
41- • • •
49- 49- • •
+31
V
7
8
1
9
1
10
1ii
12
J
13
14
BALANCED AMPLIFIER
ve.
R47 200
+31 V
C16 160PF
CR13 24.3V
CI7
0.01
• 3.9V
3.9V
QII
012
R46
R50
200
200
I;R48 4.02K
-26V
•
•
f
C'S
3.3PF
R55
R57
R58
121 3.65K
121
• 4.5V +31
V
013
014
R56
R59
2K
2K
CR14
CI9
by
0.01
-26V
.9V
R53 2K
7
1. •
dB
41-
3.3PF
+31 V
+31 V
CRI5
CRI6
R 6 1
20
R63 301
R60 3.0IK
•
I C21*
-.86V
1,0.68PF
-.8V
015
016
017
C23
2.2V
R66 3.0IK
R70 200
COI
0.01
AC AND DC FEEDBACK
018
R68
C26
lO
0.02
R69 -C27
I.
T
0.02
-26V
I C36*
-18.8V
R67 +31 V
301
.7V
R78 4.99K
020
.2v
0.02
I
\ 7v P- P
47 OdElm
4
15
J
16
17
R90
2.7
0
\
1
AVERAGE DETECTOR
+31 V C45
.1
CR23 5.1 I V
RBI 499
'OA
•86 I.37K
R84
R87
6.I9K 750
•
, 4.7V
R85
100
•
R83
100„,n,
w.
I.69K R82 FREO /2-1"F
C43
RESPONSE
R88
eFr V 2.10K
R76
OV OC
62
C46
0.1;
HIGH FREO
BALANCE
I.2-3.5PF
7V P9
C29
A4T7O048,,,
T
0.02
021
023
022
-7.2V
- 7.6V
CR20 7.32V
I
R65
R79
-26V
15.2v 200
4.02K
C22
R64
10PF
499
-26V
C24 100PF -26V
CR19 18.2V
.7v
R73 200 C30
0.01
•
0 V
AC AND DC FEEDBACK
•
•
11<
•
•
•
•
•
C33
0.01
•
Ac AND DC FEEDBACK
•
•
•
•
•
•
•
-•
•-
•
•
4
R77 62
-26V
30
70
_C42 270
6-4v DCPbue:e
v
C40* 180
OV OC
6.8 pF
ATTENUATORS (S4)
3 0 TO ATTENUATORS (S4)
923
CR2
OVO
C44
10 0
P
/OA3
METER AND LEVELING (00654-66503)
METER
OFFSET
fi
CURRENT
REFERENCE
1
«
7
CR2 6.2V
-26V
R6 1330
R9 4.53K
METER OFFSET
CAL
an
7
e
AMPLITUDE CURRENT
REFERENCE
AMPLITUDE
P/041
POWER SUPPLY
100654-66500
/6
e<
3480
+31 V
METER DIFFERENTIAL
AMPLIFIER
+31 V
+31
CR3 6.49V
RII
* 24.IV
69.8K
.23.5V
02
03
-.6V
C5 390PF
4,
7
v
04
NIV
+31 V
C7 500
-26v
RI6 10K
32
3
11
0
4
P/0 S2
IRANGEI
4
METER CAL
m
U
m
AMPLITUDE CONTROL,
INTEGRATOR
AMPLITUDE CAL
•
Z"
G
RI9
R20 500
X
CR4
V DL
-C8
Ov
+31 V
+31 V
R22
69.8K
)
.
CIO
22
.23.4V
06
07
.6V
7 7
R2I I24K
-26V
COPYRIGHT 1968 BY HEWLETT -PACKARD COMPANY
C9 .100PF
+31 V
CR6 6.49V
.24.IV
08
IOV
R23 1.8K
7 3V
CR5i
V
- 26V
+31 V
R25
500
09
.6.7V.
4
ElE1
P/0 S2
RANGE
924(F)
947
924
EEO
EICI3
O
10
LEVEL CONTROL TO
BUFFER AMPLIFIER
(A2 PIN 5)
9 .
11) LEVEL CONTROL TO
BUFFER AMPLIFIER
(A2 PIN 5)
J
6344,-1769A
2
P/0 Figure 7-3. Balanced Amplifier, Meter and Leveling
Al, A2, A3.
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