TM 55-1510-220-10
Figure 3-6. TSEC/KY-58 Voice Security System
d.
Operating Instructions.
(1)
Loading procedures.
NOTE
These
procedures
must
be
accomplished prior to takeoff.
(a)
Set the TSEC/KY-58 power switch
to ON.
(b)
Set the TSEC/KY-58 address selector
switch to the register to be filled.
(c)
Set the TSEC/KY-58 MODE switch
to LD.
(d)
Identify the loaded variable on the
TSEC/KY-58 writing surface.
(e)
To load additional variables, set the
TSEC/KY-58 address selector switch
to the next storage register to be filled
and repeat steps 1, 2, and 3.
(f)
Set the TSEC/KY-58 MODE switch
to C; leave the TSEC/KY58 address
selector switch in any numbered
register.
(2)
Preparing the TSEC/KY-58 for secure voice
operations.
NOTE
These
procedures
must
be
accomplished prior to takeoff and
normally
following
the
loading
procedures outlined above.
(a)
TSEC/KY-58 power switch is set to
ON.
(b)
TSEC/KY-58 MODE switch is set to
C.
(c)
TSEC/KY-58 address selector switch
is set to any numbered storage register
position.
(d)
Turn the TSEC/KY-58 VOLUME
switch fully clockwise.
(3)
Receiver operating procedure:
(a)
Transmitter-interphone
selector
switch (audio control panel, fig 3-1)
No. 4 position.
(b)
HF function selector switch (fig. 3-7)
Set to USB, LSB or AM.
Change 2
3-14
