SIGNAL 
TRANSDUCERS CONDITIONERS MODUL ATORS 
; oe | 
MULTI- 
PLEXED 
DATA les ANALOG 
Tink STORAGE 
| | | 
' ' 
\ \ DEMULTIPLEXERS DEMODULATORS 
' \ \ | 
bot 
\ \ 
H c 
i s 0 ANALOG TO DIGITAL 
M CONVERTER 
M DIGITAL OUTPUT 
U TO COMPUTER 
F 
3 A 
REFERENCE T 
TRANSDUCER A 
EXCITATION 
R 
ry 
INSPECT 
FIGURE 1 
VOLTAGE 
DIFFERENTIAL PHASE-SENSITIVE CONTROLLED 
TRANSDUCERS AMPLIFIERS DEMODULATORS OSCILLATORS 
REFERENCE 
CHANNEL 1 
FM-TRAN 
MITTER! 
TRANSDUCER 
EXCITATION 
FIGURE 2 
LOW PASS 
BAND PASS FM OUTPUT 
FILTERS DISCRIMINATORS FILTERS 
SAMPLING 
SWITCH 
© ANALOG TO DIGITAL 
CONVERTER 
DIGITAL OUTPUT 
TO COMPUTER 
| 
| 
| 
| 
CHANNEL 
12 
TAPE SPEED COMPENSATOR 
GALVA- 
NOMETER 
RECORDER 
FIGURE 3 
57 
