National Stock Number:
5895-21-851-9649
Federal Supply Class:
5895
National Item Identification Number:
218519649
Description:
KEYER,FREQUENCY SHI
Detail:
AN ELECTRONIC DEVICE WHICH, IN ACCORDANCE WITH AN INTELLIGENCE SIGNAL, VARIES THE FREQUENCY OF A RADIO TRANSMITTER TO WHICH IT IS CONNECTED. IT IS GENERALLY USED IN THE TRANSMISSION OF TELEGRAPH SIGNALS WHEREIN THE "MARK" SIGNAL IS TRANSMITTED AT A GIVEN FREQUENCY AND THE "SPACE" SIGNAL AT A FREQUENCY DISPLACED FROM THE "MARK" FREQUENCY BY A FIXED NUMBER OF HERTZ (USUALLY 800).
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