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HP 8901B - Page 288

HP 8901B
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A4
FM DEMODULATOR
ASSEMBLY
,
FM
our
A6
AM DEMODULATOR
ASSEMBLY
>---
I
AUDIO
OVERVOLTAGE
FM SQUELCH
DEMODULATOR TOlFROM
FM
h
DETECTOR
0D3
STATUS
ABSOLUTE PEAK
I
,
,
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f
'2
'3
rn
/I
<
Q
A5
VOLTMETER ASSEMBLY
7--
I
7
AUDIO
AVERAGE DETECTOR
7
HALF-WAVE
-
I
TP5
RECT
OUT
AUDIO PEAK
SA~LE.
BUFFER
DETECTOR
AND-HDLQ
AMPLIFIER
I
PK
DE
OUT
CAP
L__
14
INPUT
I
SELECTORS
I
0
AUDIO RANGE LEVEL
AUDIO DISTORTION
SERVICE INPUTS
I
7
VOLTAGE-TO-TIME CDNVERTER-
(NOTE
I1
'
13
I
I
COMPARATOR
I
AUDIO AVERAGE LEVEL
I
-04-
I
DEMODULATOR
I
'3
0D3
FROM AM
I
0D3
'2
-0;
I
I
-0
I
I
FROM AM
CALIBRATOR
AUDIO PEAK LEVEL
RF PWRJSENSOR TYPE
0D2
0
FROM POWER
METER
01
RF
LEVEL
0D2
-
I
GENERATOR
VOLTAGE REF
&
TPZ RAMP GATE
FROM
COUNTER
0D5
I
REF
FROM RF
DETECTOR
I-
OPTION
030
SERIES ONLY
-,
PRE-RMS
OUTPUT
I
FROM IF
AMPLIFLIERI
DETECTOR
DECODER
AN0
LATCH
INSTRUMENT
BUS TOIFROM
CONTROLLER
I
I
I
i
,
J
,
JZ
I
OUTPUT/
-_
--
-_
__
-_
A52 AUDIO COU~T~RlDISTORTION AlALYZER ASSEMBLY
_
_
__
w9
--r<+-@-c-(
I
I1
J2
I
(EXCEPT OPT
0011
RMS-TO-DC RIPPLE
CONVERTER FILTER
AUDIO INPUT
I
JZ
I
w53
I
OUTPUT/
I
AUDIO INPUT/
(OPT
001
ONLY1
L--__-
AUDIO
AWL
I
DISTORTION
I
our
FILTERS NOTCH
7
AMPLIFIER
2
7
-
w
/
AUDIO COUNTER
,
U
COUNTER
BUFFER
I+
SCHMITT
TRIGGER
COUNTIPULSE
SWITCH
I
I-
COUNTER STAGES
1-4
-\
+I6
CDUNTJPULSE
'16
t16
*I6
COUNT
OUT
RESET RESET RESET RESET
OUTPUT
SWITCH
2l-c-
AND
I
LATCHES
-
-
AUDIO COUNT
INSTRUMENT BUS
TOIFROM CONTROLLER
0D5
a
AUDIO
COUNT
I
I
I
i
BD4
BE-9