c. Secure voice operation. For secure voice operation with the KY-65 secure
voice modem, disconnect the short audio cable from the lower AUDIO jack on the
amplifier-converter (push connector inward, and turn counterclockwise).
Connect
the KY-65 secure voice audio cable between the AUDIO jack on the secure voice modem
and the AUDIO jack on the RT. Connect the handset to the HANDSET connector on the
amplifier-converter. Connect the power cable branch to the power connector on the
secure voice modem. Connect the KY-65 secure voice radio cable between the lower
AUDIO connector on the amplifier-converter and the RADIO connector on the secure
voice modem.
d. Teletypewriter operation.
The teletypewriter is connected to the
terminals on the amplifier-converter.
If the transmit-only operation is to be
used, connect the teletypewriter wires to the terminals marked TTY KEY.
If both
transmit and receive operations are to be used, also make connections to the
terminals marked DC LOOP as directed in the instructions for the teletypewriter.
Determine the loop drive current required by the teletypewriter (either 20 ma or 60
ma). Loop both LOOP and TTY KEY, and read the ma on the external meter connected
to meter terminals.
PRACTICE EXERCISES:
5.
Fault indicator lamps are provided in the--
a.
AM-6879.
b.
RT-1209.
c.
AM-6545.
d.
CU-2064.
6.
The switch used to turn the system on or off is located in the--
a.
AM-6879.
b.
RT-1209.
c.
AM-6545.
d.
CU-2064.
7.
A lighted yellow FIL lamp indicates--
a.
a low battery condition.
b.
the CU-2064 is tuning to antenna.
c.
the AM-6545 is out of alignment.
d.
low transmit power.
8.
As an operational preset, you must press CB1 and CB2 on the--
a.
AM-6879.
b.
RT-1209.
c.
AM-6545.
d.
CU-2064.
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