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TM 11-5821-333-12
1-18. VOICE OPERATION WITH KY-58 COMSEC EQUIPMENT. Continued
b. Plain-Text Voice. The operator talks into the headset. The audio signal goes from the intercom to the
to the RT (through the Z-AHQ, if used) for transmission. A received signal is routed to the intercom through
the Z-AHQ, if used, and otherwise through the KY-58 with no processing. The operator hears the audio in the
headset.
c. Cipher-Text Voice. The operator talks into the headset. The voice signal goes from the intercom to the
KY-58 (through the Z-AHQ, if used). In the KY-58, the signal is encrypted. The encrypted signal then goes to the
RT (through the Z-AHQ, if used) for transmitting. A received signal is routed from the RT to the KY-58 (through
the Z-AHQ, if used). The signal is decrypted and routed out to the intercom (through the Z-AHQ, if used). The
operator then hears the signal in the headset.
1-19. LOADING OPERATING DATA.
a. Introduction. There are three ways to load data:
Keyboard
Local fill (FH data)
Receive and store electronic remote fill (ERF)
b. Keyboard. The keyboard is used to load SC frequencies and FH sync time. The MAN frequency and the
CUE frequency are loaded in this way. A frequency of 30 MHz is automatically loaded into the MAN preset by the
RT when power is turned on. This will remain the MAN preset until another frequency is loaded using the key-
board.
c. Local Fill (FH Data). Local fill makes use of an ECCM fill device. The drawing shows what typically hap-
pens inside the RT. It is an example of hopset and lockout set loading. (The displays in the drawing are exam-
ples. The numbers may differ from those seen during actual loading.)
1-14
KY-58 (through the Z-AHQ, if used). The signal goes in and out of the KY-58 with no processing and from there
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