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HP 8901B - Page 282

HP 8901B
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\
\
,-
VOLTMETER
’-\
AUDIO CIRCUITS
AF
INPUT
r
OPT.
0307
,-
AM DEMODULATOR
IN
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I
I
I
I
I
I
I
I
,I
I
r
LOCAL OSCl LLATOR
-
I
I- I
HF
VCO
iB
TO
COUNTER
40-80 MHz
LOW FREOUENCY
vcxo
SAMPLER
:
vcxo
JNE
@
2
MHZ
t6.25
kHz
RF
INPUT
I
U
INSTRUMENT BUS
FROM
CONTROLLER
I
#--
HF
VCO
TUNE
INTEGRATOR
AN0 AMPLIFIER
I
DIGITAL BLOCK
I
I
1
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-
HF
VCO
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-
-
- -
-
-
4,
TUNE
ilSWEEP
DOWN/
11
SWEEP
UP
11
CURRENT TRACK LOOP
SOURCE AMPLIFIER
I
A
STOP SWEEP
IF OUT
LEVEL
TO
VOLTMETER
THIS PAGE
i
r--
I
I
I
I
I
.TIME
BASE
t
IF
II
-
HF
VCO
iB
.
-
-
FM
CAL
INSTRUMENT BUS
TO/FROM CONTROLLER
KEYBOARO AN0 OISPLAY
7
I
I
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IW
I
II
I
II
II
II
I
INSTRUMENT BUS
FROM CONTROLLER
I
I
REMOTE CONTROL
?-
1
RF
SWITCH
1
I
AUDIO
OISTORTION
,
€VEL
RF
LEVEL
IF OUT
r-----
50
Mnz
OECOOERS
L--_---l
OUTPUT
LATCHES
POWER REF
OSCILLATOR
-
I
I
,-
AM AND
FM
CALIBRATORS
II
AMPLIFIER
I--
-
I
I
AM CAL
I
BRATOR
P
I-
AM TO
CALIBRATION VOLTMETER
THIS PA6E
OIGITAL-TO-ANALOG
CONVERTERS
4
RF
PUR/
SENSOR
RESISTOR
,
THIS
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PAEE
II
II
I
I
-
FM
CAL
I
BRATOR
-
AMPLITUOE
FM
SOURCE
10.1 MHZ LIMITER
-
FM
CAL
I
BRATOR
-
AMPLITUOE
FM
SOURCE
10.1 MHZ LIMITER
I
AM/FM
OUTPUT
V
I/O
ROM
CONTROL BUS
0
E
c
0 0
E
R
s
AN0
LATCHES
TO
HP-I0
CONNECTOR
(REAR PANEL1
Y
MICROPROCESSOR
r
TEST
7
REMOTE
OATA BUS
0
C
I
I
BATTERY
-4
LINE
I
FUSE
-4
AOORESS BUS
-4
LINE
-,.--@
INPUT
-
MEMORY
MOM
AND RAMI
T
JF
RMS
LEVEL
(OPTION
030
SERIES ONLY)
OVERPONER
PROTECT
STATUS
AMPLIFIER
OVERPOWER
STATUS
OECOOERS DECOOERS
AN0 AN0
LATCHES
LA T
C
H
E
S
I
I
BD3
I
I
INSTRUMENT
BUS
TOIFROM
CONTROLLER
INSTRUMENT
BUS
FROM CONTROLLER
BD2