ANTENNA 
LOW-PASS 
RECEIVER SUBCARRIER FILTER 
COLLINS DISCRIMINATOR [square 14.CPS 
51d 4 1700 CPS+ 7.5% WAVE CUT- OFF 
ELECTRONIC 
COUNTER 
"10 PERIOD 
AVERAGE " 
H.P. 
Fig. 10 - Receiver Station Block Diagram 
RECEIVER SET 
FREQUENCY 
2,398.0 KC 
2396.3 KC 
1700 CPS 
MARKER TRANSMITTER 1400CPS 
FREQUENCY FOR BFO 
ZERO ple 
RECEIVER 1400 CPS 
MECHANICAL FILTER 
\ RESPONSE 
2396 2397 ‘ 2399 2400 
FREQUENCY KC I | 
KEYED CARRIER UNKEYED CARRIER 
Fig. ll - Spectral Presentation of Receiver Adjustment 
48 
