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selected and displays a 1: (selected radio) in the scratchpad. This sublevel is used for SINCGARS
coldstart operation. The SINCGARS coldstart operation is used for receiving or transmitting
SINCGARS hopsets and locksets so a user can be added to the net. There is no 30 second time-out
during option selections. The XMIT option is not displayed if ADF is enabled for the current radio.
The SG LSET is used to enter the SINCGARS lockset for transmission or reception. Touching the
SG LSET touch option/display border highlights the option and the last lockset is displayed in the
scratchpad. The lockset may be changed by touching the desired number on the keypad options (1 thru
8), verifying the new lockset in the scratchpad, and touching ENT. With the desired lockset displayed
Figure 23-14. AJ MENU From SINCGARS COMM Sublevel
Figure 23-15. AJ SINCGARS ERF Sublevel
A1-F18EA-NFM-000
VII-23-21 ORIGINAL
in the scratchpad, the lockset is transmitted or received by touching the XMIT or RCV option.
Touching the XMIT option transmits the new radio lockset and the option is border highlighted for 2
seconds. Touching the RCV option enables the radio to receive the lockset and the option remains
border highlighted until the lockset is received.
Touching the SG HSET touch option/display border highlights the option and the last hopset is
displayed in the scratchpad. The hopset may be changed by touching the desired number on the
keypad options (1 thru 20), verifying the new hopset in the scratchpad, and touching ENT. With the
desired hopset displayed in the scratchpad, the hopset is transmitted or received by touching the
XMIT or RCV option. Touching the XMIT option transmits the new radio hopset and the option is
border highlighted for 2 seconds. Touching the RCV option enables the radio to receive the hopset and
the option remains border highlighted until the hopset is received. The XMIT and RCV options can
not be selected at the same time.
Selecting the RTN option returns the AJ SINCGARS ERF format to the AJ SINCGARS menu
sublevel. Selecting the RTN option again returns the AJ SINCGARS menu sublevel to the COMM
sublevel that is in the SINCGARS AJ mode.
23.4.2 Guard Transmit on Top Level CNI Format. On the top level CNI format, placing the COMM
G XMT switch on the ACI panel to 1 or 2 selects guard transmit for that radio and GXMT replaces
the COMM touch option/display (see figure 23-16). The COMM sublevel also displays GXMT in the
scratchpad (see figure 23-17).
23.5 KY-58 - SECURE SPEECH SYSTEM
The secure speech system is used for ciphering (coding) or deciphering (decoding) audio routed
through the COMM 1 and COMM 2 receiver-transmitters. The system consists primarily of the KY-58
control panel assembly on the right console. Controls and indicators are on the KY-58 control panel
assembly and on the COMM control panel on the left console.
Figure 23-16. Guard Transmit on Top Level CNI Format
A1-F18EA-NFM-000
VII-23-22 ORIGINAL
23.5.1 KY-58 Control Panel Assembly. The control panel assembly functions as a ciphering or
deciphering device for secure speech operation.
23.5.1.1 Ciphered Transmission. During ciphered transmissions, audio from the microphone is
routed through the COMM control panel to the KY-58 control panel assembly where it is enciphered.
The enciphered audio is routed back to the COMM control panel, then to COMM 1 or COMM 2
receiver-transmitter for transmission.
23.5.1.2 Ciphered Reception. During reception of ciphered information, the ciphered audio is
routed from the COMM 1 or COMM 2 receiver-transmitter to the COMM control panel, then to the
control panel assembly for deciphering. Deciphered audio is routed to the COMM control panel and
the headset.
23.5.1.3 Ciphered Relay Mode. During ciphered relay mode of operation, ciphered information
received on one radio is routed from the radio, through the COMM control panel to the second radio
for transmission. Ciphered information received on the first radio is also routed through the COMM
control panel to the KY-58 control panel assembly for deciphering. Deciphered audio is routed through
the COMM control panel to the headset. This enables the crewmember to hear deciphered relayed
audio in the ciphered relay mode. When cipher is selected on the COMM control panel immediately
after operating in relay plain, COMM 1 plain, or COMM 2 plain mode of operation, the crewmember
must press the transmit key for either COMM 1 or COMM 2 two times to enable ciphered relay
operations. When the relay aircraft is operating both radios within the same bandwidth, the two
frequency selections must be separated by a minimum of 10 MHz.
23.5.2 KY-58 Controls and Indicators. The only cipher control on the COMM control panel is the
　
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