HEADQUARTERS OH-58A, Техническое руководство

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TM 55-1520-228-10
3-32. AUTOMATIC REMOTE KEYING
PROCEDURE.
NOTE
Automatic Remote Keying (AK) causes an “old”
crypto-net variable (CNV) to be replaced by a
“new” CNV. Net Controller simply transmit the
“new” CNV to your KY-58.
a. The Net Controller will use a secure voice
channel, with directions to stand by a for an AK trans-
mission. Calls should not be made during this stand by
action.
b. Several beeps should now be heard in your
headset. This means that the “old” CNV is being re-
placed by a “new” CNV.
c. Using this “new” CNV, the net controller will
ask you for a “radio check.”
d. After the “radio check” is completed, the Net
Controller instructions will be to resume normal commu-
nications. No action should be taken until the net con-
troller requests a “radio check.”
3-33. MANUAL REMOTE KEYING PROCE-
DURES. The Net Controller will make contact on
a secure voice channel with instructions to stand by for
a new crypto-net variable (CNV) by a Manual Remote
Keying (MK) action.
Upon instructions from the Net
Controller:
a. Set the Z-AHP FILL switch to position 6. Notify
the Net Controller by radio, and stand by.
b. When notified by the Net Controller, set the
Z-AHP MODE switch to RV (receive variable). Notify
the Net Controller, and stand by.
c. When notified by the Net Controller, set the
Z-AHP FILL switch to any storage position selected to
receive the new CNV (may be unused or may contain
the variable being replaced). Notify the Net Controller,
and stand by.
NOTE
When performing Step c. the storage position
(1 through 6) selected to receive the new CNV
nay be unused, or it may contain the variable
which is being replaced.
d. Upon instructions from the Net Controller:
(1) Listen for a beep on your headset.
(2) Wait two seconds.
(3) Set the RCU MODE switch to OP.
(4) Confirm.
e. If the MK operation was successful, the Net
Controller will now contact you via the new CNV.
f. If the MK operation was not successful, the Net
Controller will contact you via clear voice (plain) trans-
mission; with instructions to set your Z-AHP FILL selec-
tor switch to position 6, and stand by while the MK op-
eration is repeated.
3-34. KY-58 AUDIO TONES. It is important to be fa-
miliar with certain KY-58 audio tones. Some tones indi-
cate normal operation, while others indicate equipment
malfunction. These tones are:
a. Continuous beeping, with background noise,
is cryptoalarm. This occurs when power is first applied to
the KY-58, or when the KY-58 is zeroized. This beeping
is part of normal KY-58 operation. To clear this tone,
press and release the PTT button on the Z-AHQ (after
the Z-AHQ LOCAL switch has been pressed). Also the
PTT can be pressed in the cockpit.
b. Background noise indicates that the KY-58 is
working properly. This noise should occur at TURN ON
of the KY-58, and also when the KY-58 is generating
a cryptovariable. If the background noise is not heard
at TURN ON, the equipment must be checked out by
maintenance personnel.
c. Continuous tone, could indicate a “parity
alarm.” This will occur whenever an empty storage
register is selected while holding the PTT button is.
This tone can mean any of three conditions:
(1) Selection of an empty storage register.
(2) A “bad” cryptovariable is present.
(3) Equipment failure has occurred. To clear
this tone, follow the “Loading Procedures” in . If this tone
continues, have the equipment checked out by mainte-
nance personnel.
3-16