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PTT switch, wait until tune
tone stops and begin communications.
When PTT
switch is pressed, the XMT
frequency is displayed.
Normal ALE Communication
Set function switch to T/R
and mode switch to ALE.
(NOTE: If the selected net is
configured for link protection
but does not have accurate
time, SYNC instead of POSN
will appear on display, line 2
right side along with an UNSYNC
advisory at bottom of
screen. An ALE link protection
time sync needs to be
performed. If ALE data is not
loaded for the selected scan
list, a CHANNEL INOP advisory
is displayed). Use - SQL
+ switch too set squelch to
TONE. Adjust VOL for comfortable
listening level. Use -
SQL + switch to set squelch
to 0. Headset is muted until a
link is established. If channel
is noisy, adjust squelch. Higher
squelch levels are not recommended
for ALE mode of
operation.
Normal ALE
Communication
Receiving
When ALE call is received
INCOMING CALL is displayed
with the address field
displaying xcaller’s ALE address.
LINKED is displayed
and short gong tone sounds
when an ALE link is established.
Communication can
now begin. Proper protocol is
for calling station to make
first transmission.
Normal ALE
Communication -
Transmitting
Select ALE address to be
called by doing a, b, or c:
a. Set channel/net
switch to desired preprogrammed
net.
b. Use VALUE switch
to scroll through and select
preprogrammed address.
TM 1-1520-240-10
3-2-21
CONTROLS/
INDICATOR
FUNCTION
c. Press EDIT line-select
switch, then use CURSOR
and VALUE switches to
manually select an address
character-by-character.
(NOTE: NET INOP advisory
is displayed if a selected
channel or net contains: no
data or corrupted data; or
hardware cannot support the
selected mode). Press microphone
PTT switch CALLING
is displayed LINKED is
displayed with a short gong
tone and headset audio is restored
when link established.
Start transmission. The system
terminates the link and
returns to ALE scanning after
a period of inactivity (30 seconds
typical). GPS position
can also be transmitted by
using the steps above plus
the Transmit Position Report
steps.
ALE Link Protection
Time Sync
Press PTT switch or SYNC
line-select switch. System returns
to scan and the net default
address if sync successful,
but if unsuccessful press
ABORT line-select switch to
return to ALE screen.
ECCM Net Initialization
Set function switch to T/R
and mode switch to ECCM.
(NOTE: If ECCM data or
keys are not loaded for net
selected, a CHANNEL INOP
advisory is displayed). Set
channel/net switch to desired
net. If selected channel is an
ALE/ECCM channel, the address
of station being called
is displayed on line two.
(NOTE: NET INOP advisory
is displayed if selected channel
or net contains: no or corrupted
data; or hardware
cannot support selected
mode. If screen displays UNTUNED
or UNSYNC advisories
proceed with system
Tune/Sync operation, other
wise proceed with ECCM operation.
CONTROLS/
INDICATOR
FUNCTION
ECCM Tune/Sync
Operation
Press either TUNE line-select
switch or microphone PTT
switch to initiate combined
tune and sync. TUNING followed
by SYNCING is displayed
during process. System,
will return to ECCM
screen without UNTUNED
and/or UNSYNC advisories if
successful.
ECCM Operation Use -SQL switch to set
squelch to TONE. Adjust
VOL control for comfortable
listening level. Use SQL +
switch to set squelch to 0. If
channel is noisy, set to 1.
Higher settings are not recommended
for ECCM operation.
ECCM Operation -
Receiving Calls
RCVING PREAMBLE and/or
INCOMING CALL is displayed.
ECCM Operations -
Transmitting
Press microphone PTT
switch. Wait for preamble
tones to cease then begin
communications. If an ALE/
ECCM channel is used,
CALLING is displayed while
call in process. LINKED is
displayed and a short gong
tone sounds, and headset
audio is restored when link
established. (NOTE: Press
ABRT line-select switch to
abort calling process). Call
initiator should make first
transmission. The system terminates
link and returns to
scan after a period of inactivity
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