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manual frequency selectors, and the tone button are utilized
to load the required segments for each MWOD.
Channel positions 20–14 are used to facilitate the loading
of MWOD segments. A minimum of one WOD must
be stored for the unit to be functional in the AJ mode.
Channel position 14 is used for day-of-month information
(date code). The date code is represented by frequency
3AB.000 MHz in which AB is the day of the month. For
example; if today’s date is the 15th of the month, the date
code entry would be 315.000 MHz. Channel position 1 is
used for entering the current operational date is the same
as the date code format.
When the radio is turned off or power is lost after entry of
MWOD and date code, the data is not lost; therefore, the
information remains intact until manually changed or erased.
The six most recently entered MWOD’s are retained.
If a MWOD with duplicate date is entered, the new
entry takes precedence.
After the MWOD information is entered, the pilot would
proceed to obtain the TOD. Operational date information
is part of the HQII TOD message. If HQII TOD message
is unavailable, the pilot must manually enter the operational
date so the radio can select the proper MWOD. If
power is lost, operational date is lost and must be reentered.
3-2-7. Time-of-Day.
The TOD is essential for communicating in the AJ mode
which allows frequency-hopping at the same instant in
time. Reception and transmission of the TOD is possible
in normal and AJ modes. The first TOD reception must
occur in the normal mode.
The radio automatically accepts the first TOD message
once the predesignated frequency for TOD transmission
has been entered and the T position of the hundredth
megahertz selector has been momentarily selected and
released. Subsequent messages are ignored unless the
pilot enables the radio to receive a new/updated TOD.
The TOD contained in a radio may also be sent to other
radios similarly equipped.
3-2-8. Net Number.
The net number enables multiple station nets to operate
simultaneously on a noninterfering basis in AJ mode,
while sharing a common WOD and TOD. The net number
begins with the letter A and is followed by three digits
from 000 to 999. The last two digits of the display designate
how the radio is to function and/or the frequency
hopping table being used (Table 3-2-2). Net number
availability is dependent on the operational mode of AJ
and is depicted in table 3-2-3.
Table 3-2-2. Net Selection
TACTICAL
00 - Basic HAVE QUICK
25 - HAVE QUICK II NATO Hopset
50 - HAVE QUICK II non-NATO Hopset
75 - Not Used-Interrupted Fault Tone
TRAINING
00 - Basic HAVE QUICK Training
25 - HAVE QUICK II Training
50/75 - Not Used - Interrupted Fault Tone
Table 3-2-3. Net Type, Quantity, and Frequency
Range
Types of Nets Quantity Range of Nets
Basic HQ Training 5 A00.000 – A00.400
Basic HQ Tactical 1000 A00.000 – A01.500
HQ II Training 16 A00.025 – A01.525
HQ II Tactical 1000 A00.0XX – A99.9XX
NOTE
Any selection of a net number outside the
range indicated, for each type of net, will result
in the invalid number warning tone.
TM 1-1520-240-10
3-2-6
3-2-9. Conferencing.
In the AJ mode, the radio has the capability to receive
and process two simultaneous transmissions on the
same net. This conferencing capability is selected by the
hundredth and thousandth digits of WOD segment 2,
loaded using channel position 19 and is disabled when
operating in the secure speech mode.
In a conference net, the second transmitting radio will
automatically shift its transmission frequency by 25 kHz
when it monitors a transmission on the primary net frequency.
The wide band receiver will monitor both transmissions
without the interference normally associated
with two radio transmitting on the same frequency simultaneously.
Three simultaneous transmissions will create
garbled reception.
3-2-10. Controls and Function, UHF-AM Have Quick
II Radio (AN/ARC-164). (fig. 3-2-4)
CONTROL/
INDICATOR
FUNCTION
Function Select
Switch
Four position rotary switch
used to select radio operating
mode.
OFF Power to set is disabled; radio
set inoperative.
MAIN Radio set can be used to
transmit and receive; guard receiver
inoperative.
BOTH Radio set can be used to
transmit and receive; guard receiver
operates.
ADF Not used.
Figure 3-2-4. UHF-AM Have Quick II Radio
(An/ARC-164)
CONTROLS/
INDICATOR
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