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|  seconds, the tone should be interrupted at a 2.3 Hz rate.
us
(c) The cipher equipment is placed in a standby
transmissio
condition by pressing and immediately releasing the
n by two (or
respective push-to-talk switch.
The preamble tone
more)
should no longer be audible.
secured
NOTE
on
the
Do not talk
same
for
approximat
will result in
ely
two
the garbling
seconds
of
after
messages
pressing
and
the
U-
possible
94AIU
loss
of
press-to-
synchroniza
talk switch.
tion in the
This
receivers.
permits the
Always
crypto
monitor the
equipment
transmit
to reach full
operation.
before
(d)
To
transmitting
transmit,
to
assure
press
the
noninterfere
press-to-
nce
with
talk switch
another
of
the
appropriate
(e) When transmission is complete, release the
U-94A/U.
press-to-talk switch. The cipher equipment is now
In
returned to the standby condition.
approximat
(f) To receive, it is necessary for another station to
ely one- half
send a transmission. Upon receipt of the signal, the
seconds, a
cipher equipment will be automatically switched to the
beep will be
receive condition. At the same time a short beep will be
heard. This
heard in the headset. Reception will then be possible.
indicates
Upon loss of the signal, the cipher equipment will be
the
automatically returned to the standby condition.
receiving
station
is
3-9. Normal Stopping Procedures
now
The console may be disabled by setting the POWER
capable of
circuit breaker to OFF. If this is done, the individual
reception.
components must be set to their respective off positions
Transmissi
before restarting. To perform the normal stopping
on
can
procedure for the individual components,
set the
begin.
controls to the positions given in the chart below.
CAUTION
Component
Control
Position
Only
one
Stations 1 through RECEIVERS 1, 2, 3, 4
ciphered
6 ICS boxes
switches
off
message
(down)
can
be
RECEIVERS INT switch
off
transmitted
(down)
at a given
VOL control
full
time on a
counter-
given
clockwise
Simultaneo
3-15
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