Tektronix AA 501 - DIAGRAMS AND CIRCUIT BOARD ILLUSTRATIONS; BLOCK DIAGRAM

NOTCH
F
I LTER
CONTROL
AUTOMATICALLY
TUNES
NOTCH FILTER
INTERMODULATION
DISTORTION
MEASUREMENTS
I A14
A
I
CONTROL
LOG
I C
l NPUT
MONITOR
O
AUTORANGING
AND DISPLAY
FORMATTING
FUNCTION AUXILIARY
OUTPUl
?
0
1 POVER 1
SUPPLY
BLOCK D I AGRAM
AGC
+ *
F 1 LTERS RMS/AVG dB D I SPLAY
a-4VRMS
- 2v~ns ~~>~~k
-*
RESPONSE
DETECTS CONVERTS TO
OF SIGNAL TO
dD DIGITAL
MEASURE- LEVEL
SCALE CONVERTER
MENT
A15
A15 A12
A10
INPUT
STAGE
A14
8-lvRns
0-3VRMS
DISTORTION
AMPL 1 F [ ER
A A A A
ADJUSTS
GAIN FOR
CONSTANT
OUTPUT
A14
INPUT
- 0
- -
FREQUENCY
DISCRIMINATOR
SELECTS NOTCH
FILTER
RANGE
REMOVES
FUNDAMENTAL
FREQUENCY
A14
v
dBR
CONTROL
ZERO POINT
OF
dB
CONVERTER
A12
PROCESSES
l NPUT
SIGNAL
A14
)