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no soundw ill be heard.
9. Key radio and hold. A siqle beep tone will be
heardi n approximatelly-l /2 secondsif, delayi s
selectedo,t herwiseb, eepia immediateW. hent his
tone is heard,t he equipmenits readyf or cipher
transmission.
10. Atler beepto nei s hearde, stablisthw o-wayc ipher
radioc omnmnicationwsi th a cooperatingr ound
station and check for readability and signal
Strength.
11. Setp owera ndr adio selectosr witchesin accordancew
ith the tacticals ituation.
Note
Ifagmundcheckoftheequipmentianotprao
tical,thealxwepmwdmeamaybeusedto
performa ui n-flightc hecko f the eqmpment.
19.53 Poatlaunch. The speechs ecuritye quipment
shalbl e operateda sd ire&d by appropriataeu thority.
19.54 After Landing
1. ZEROIZE switch - ZEROIZB (as briefed).
Zeroize the code as directed by appropriate
authority.
2. Power switch - OFF.
ORIGINAL 19-20
19.6 JOINT TACTICAL INFORMATION
DISTRIBUTION SYSTEM
The JTIDS is a high-capacity communications system
providing jam-resistant, secure digital voice and
data. This system also provides voice and data relay,
dual navigation grid operation, and tacan data.
The JTIDS digital voice function provides two secure,
jam-resistant, separate (Jl and J2) 16 KBS voice
channels. These are integrated into both the pilot and
RIO cockpits.
The JTIDS data communications fonction provides a
two-way data transfer between the F-14D and other
JTIDS users for position and identification, air intercept
control, and fighter-to-fighter functions. Identification
is accomplished among participants, Navy (CVs, CGs,
DDGs, E-2Cs, and F-14Ds) and other services (E-3s,
F-l% etc.) by the PPLI message. The AIC function
provides the exchange of command and control information
and own-ship sensor tracks/status between the
F-14D and a control platform (E-2C or ship). Fighterto-
fighter functions provide the direct exchange of
tighter tracks and status among fighters.
The relay fonctioa provides the capability for JTIDS
to retransmitv oice or datam essagesfo r extended-range
communications. This function provides expanded battle
group operations by expanding communication
ranges (voice, PPLI, etc.) beyond line of sight, greater
than 300 mn, air to air.
JTIDS operatesin both the geodetica ndr elative navigation
modes simultaneously. JTIDS also provides the
MCS corrections to the own-ship navigation position,
which is calculated using data received from the link,
and own-ship INS or SAHRS data. See Chapter 20 for
additional explanation of JTIDS navigation functions.
The JTIDS communication system utilizes three major
tactical modes: one-way AIC (pass), two-way AK,
and F/F. These modes are integrated into the aircraft
controls and displays utilizing the TID, DD, MFDs
(TSD, VDI, and HSD formats) and DEU. Refer to
NAVAIR Ol-F14AAD-IA for the detailed operation of
the TID, DD, and TSD. The JTIDS terminal interfaces
with the various aircraft systems via 1553 mission bus
No. 2 and MCS. The majority of JTIDS processing is
performed by mission computer 1. In the event of a
mission computer failure, the other computer will support
tacaa operation and provide own-ship position for
the PPLI message. JTIDS BIT function is provided via
the OBC page on the MFD.
NAVAIR 0%Fl4AAD-1
When installed, the JTIDS receiver/transmitter mplaces
the AN/ARN-118 tacan system. Within the
JTIDS terminal (DPG and Wr), the equivalent functionality
of the AN/ARN-118 tacan system exists.
19.6.1 JTIDS Terminal. The JTIDS ANAJRC-107
Class 2 terminal consists of the following WRAs:
1. Data processor group (interface unit and digital
data processor)
2. Secure data unit
3. JTIDS receiver transmitter
4. Battery assembly.
5. Circuit breaker protection is provided through the
28-Vdc essential and 1 I5-Vat essential buses.
19.6.1.1 Digital Data Processor. The DDPispart
of the JTIDS data processor group and the heart of the
JTIDS Link-16 operation. It contains the net interface
computer program. The DDP is common among all
Navy and most non-Navy JTIDS platforms. The DDP
performs the following functions.
1. TDMA and message management
2. Network synchronization and relative navigation
processing
3. Receiver/transmitterc ontrol
4. Signal decoding and decryption.
19.6.1.2 JTIDS Interface Unit. TheIUispartofthe
JTIDS DPG and is unique for the Navy air platforms
(F-14D and E-2C). The IU provides all the unique interfaces
for the aircraft. A 1553 digital mux bus connects
the IU to the MCS via mission bus 2. The IU contains
　
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