HP 654A - Page 69

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- - 49- • 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 04
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.