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EGT over- fault is removed, whichever
temperature comes first.
warning.
ORIGINAL
Figure 194. Glossary of Tones
19-6
NAVAIR 91.F’l4AAD-I
from dc essential bus No. 1. Approximately 1 minute of
warmup is required in order to achieve normal operating
temperature.
19.2.2 Pilot Tone VolumelTacan Command
Panel. The TONE VOLUMEITACAN CMD panel
(Figure 19-5) on the pilot left console has two volume
controls for regulating audio signals from the ALR-67
and Sidewinder missile lock-on.
19.3 V/UHF RADIO (AN/ARC-182)
The ARC-182 radio provides multimode, multichannel,
air-to-air/air-to-surface voice, tone, and antijam
(Have Quick) communications. The ARC-182 control
panel (Figure 19-6) is located on the pilot and RIO left
console. Frequency range extends in four bands from 30
to 87.975, 108 to 155.975, 156 to 173.975, and 225 to
399.975M Hz on any of 11,960c hannels( separatedb y
25 kHz). Transmission and reception are available in
AM or FM bands. The modulation is selected automatically
by the radio except in the 225 to 399.975 band,
which is reserved for antijam use. There are 40 preset
channels available. Channels 1 through 30 are used for
normal voice communications. Channels 31 through 40
areuscdforantijamHave Quickcommunications.Guard
frequency of each band may be monitored simultaneously
with any othert iequencys elected.T he mdio is usedw ith
the OA-8697IARO to provide automatic direction fmdiig
to the transmitting station.T he ARC-182 operatesw itb
secure voice equipment (KY-58). Upper and lower antenna
installations provide reliable line-of-sight communications
to 200 nm (depending on altitude and
atmosphericc onditions). A radio frequency/channeiln -
dicator (Figure 19-7) on the pilot and RIO instrument
panel displays the frequency or channel selected. A
separateV OLUME control panel (Figure 19-8) for the
pilot is located on the pilot left console.
Transmissions on both V/UHF 1 and V/UHF
2 radios, while operating on the same tiequency,
maymsuhinasqueal.T hisisanormal
condition caused by RF interaction between
thet wo radioso peratingo n the sameR equency
in close proximity to each other.
19.3.1 Preset Channel(s) Load
1. MODE selector - T/R or T/R&G.
2. Frequency mode control - Reset.
5. Frequency select switches - Slew to Desired
Frequency.
6. Fmquency mode control - LOAD (he+ency is
stored in memory for CH 1).
7. Frequency mode control - READ, Verify Frequency
Display.
8. Enter frequency in quick reference directory for
CH 1 (if desired).
9. Repeats teps2 through 8 for subsequenct hannels.
19.3.2 Built-In Test. BIT isolates faults in the RT to
one module, two modules, and three modules. BIT
should be initiated anytime the FREQ/(CHAN) display
blanks or indicates an erroneous readout. Proceed as
follows:
1. MODE selector - TEST.
2. BRT control - As Required.
3. BIT requires approximately 10 seconds; observe
FREQ/(CHAN) display.
a. No fault is indicated by 888.888.
b. Faults are indicatedby a number that identiftes
the module or modules at fault.
Note
If readouts 061 or 651 display, select other
antenna and key transmitter for 5 seconds,
then repeat steps 1 through 3.
Figure 19-9 lists the most common BIT fault codes
and their respective module failures.
19.3.3 Have Quick (Antijam) Mode. Have Quick
is a tactical antijam system that utilizes frequency hopping,
a method where frequencies are changed many
times per second. The frequency hopping patterns,
stored in memory and frequency tables, are selected by
word-of-day, net numbers, and a given date. The antijam
mode of the ARC-182 is enabled by selecting a net
number and by placing the NORM/A.7 switch to AJ once
all the variables have been entered into the radio. For
two or more radios to successfully communicate on a
Have Quick net, each radio must have the same TOD,
WOD, and operating net.
3. CHAN SEL switch - Select Channel 1. The ARC-l 82’s Have Quick II system is compatible
with older Have Quick I systems.
4. Frequency mode control - Read.
19-7 ORIGINAL
.NAVAlR Ol-FUAAD-1
1 1 TONE VOLUME
I
TACAN CMD I
ALU-67 SW
0 02
NOMENCLATURE
a ALR-67 volume control
0 SW (Sidewinder)
volume control
FUNCTION
:lockwise rotation increases tone in pilot’s headset. Provides threat alert,
it&us and warning tones representing received threat radar signals.
Iockwise rotation increases missile tone in pilot’s headset.
:ounterclockwise rotation turns tone to low.
　
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