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q. Push the INIT button. The N in RXPTV N will stop
flashing.
r. Push the ↑ (up arrow) or → (right arrow) button until
the Operating Mode is displayed. This completes the
Receive Plaintext Volume adjustment.
3-2-33. Standard Operation.
These procedures describe normal transmit/receive operation
for cipher text and plaintext voice messages.
a. Rotate the KY-100 PRESET switch to MAN (for
manual selection) or the desired preset position.
b. For ciphertext operation: Place the MODE switch
in CT. Ciphertext messages can now be transmitted or
received. If the CT, CT ONLY menu is set for CT, plaintext
messages can also be received. When transmitting in
ciphertext, the TX an V enunciators will be lit. When
receiving a ciphertext message, the RX and V enunciators
will be lit. When receiving a plaintext message, the
PT enunciator will be lit.
c. For plaintext operation: Place the MODE switch in
PT. The CT, CT ONLY menu must be set for CT to be able
to transmit or receive plaintext messages. When transmitting
in plaintext, the TX enunciator will be lit. When
receiving a plaintext message, the RX and PT enunciators
will be lit.
3-2-34. Troubleshooting.
Follow these procedures if the KY-100 displays a FAIL
message during equipment configuration or operation.
a. Rotate the KY-100 PRESET switch to the PWR
OFF position.
b. Place the MODE switch in the OFFLINE position.
c. Rotate the RESET switch to MAN.
d. If the KY-100 does not display a FAIL message
after self test: Return to normal operation.
e. If the KY-100 does display a FAIL message after
self test: Rotate the PRESET to the PWR OFF position.
f. Pull the MODE switch and rotate it to the Z ALL
position.
g. Follow the COLD START Procedures.
h. If the KY-100 does not display a FAIL message
after self test: Return to normal operation.
i. If the KY-100 does display a FAIL message after
self test: Notify maintenance.
3-2-35. Off-Line Tests.
The off-line TEST menu consist of automatic (AUTO)
tests, user-selectable (USER) tests and software version
(VERSION) checking procedures.
a. Preliminary.
(1) Set the KY-100 MODE control to the OFFLINE
position.
(2) The display will indicate TEST which is the
first OFFLINE menu.
(3) Press the INIT pushbutton to access the
TEST submenus.
(4) Press the ↑ (up arrow) or → (right arrow)
pushbutton until the desired sub-menu option (AUTO or
USER) is displayed.
(5) Proceed to paragraph b, c or d as applicable.
b. Automatic (AUTO) Tests.
(1) With AUTO displayed, press the INIT pushbutton
to start the automatic tests.
(2) At the conclusion of the automatic tests, the
test results will be presented in the display.
(3) If the automatic test are successful, PASS
will be displayed and a pass tome will be heard. Next, the
display will indicate USER which is the next sub-menu.
To perform the USER tests, proceed to paragraph c. To
exit, rotate the MODE control switch out of the OFFLINE
position.
(4) If a failure is detected during the automatic
tests, a FAIL message will be displayed.
c. User Tests.
(1) With USER displayed, press the INIT pushbutton
to start the user tests.
(2) PT LOOP will be momentarily displayed to
indicate that a plaintext loopback test will be performed.
Next, a PTT prompt is displayed.
(3) Depress and hold the PTT switch and, with
a TALK prompt displayed, speak into the microphone.
Looped back plaintext voice will be heard in the handset
receiver.
(4) Release the PTT switch.
(5) CT LOOP will be momentarily displayed indicating
that the KY-100 is in the cipher text loopback
mode. Next, a PTT operator prompt is displayed.
(6) Press and hold PTT switch and, with a TALK
prompt displayed, speak into the microphone until the
TALK prompt disappears (approximately 15 seconds).
(7) Release the PTT switch. The LISTEN
prompt is displayed. Listen to synthesized speech at the
receiver. Upon completion of the speech loopback, observe
that PANEL is displayed.
TM 1-1520-240-10
3-2-28
NOTE
To exit and skip remaining USER tests, press
the ↑ (up arrow) or → (right arrow) pushbutton
switch within 5 seconds.
(8) Within 5 seconds after completion of the CT
loopback test, observe that all liquid crystal display (LCD)
segments are on. At completion of the display test a
momentary INIT operator prompt is displayed indicating
the start of front panel switch test.
NOTE
Failure to perform any of the panel pushbutton
and switch prompts within 30 seconds will
　
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