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the SICP that is also unique for the Navy air platforms.
The IU performs the following functions.
1. TADIL-J(Link 16)messagegenerationandreception
processing.
2. System control (TDMA - OFF/STBY/NORM,
Tacan - OFF/ON).
3. Navigation data conversion.
4. JTIDS initialization.
5. Voice conversions (analog/digital and digital/
analog) and processing.
19-21 ORIGINAL
NAVAIR 0%FIWD-1
6. Ta~an data (BDHI and 1553) and control panel
interface.
7. A&& inter&es (1553 and hardwircd discrete
signals).
19.6.1.3 Secure Data Unit. There are two types of
KGV-8 SDUs currently in use: the KGV-8(E2) for lot 1
JTIDS systems and the KGV-8B for lot 2 and newer
systems. The KGV-8B will eventually replace the older
KGV-8(E2) SDU. The KGV-8 SDU is bolted to the
~ntoftheRTandprovi&sMSECandTSEC forJTIDS
operations. Up to eight crypt0 variables can be loaded
into the KGV-8 and are addressableo n a time slot-totime
slot basis by the DDP The eight locations are split
into two groups of four locations. Tbis allows loading
and storage of crypt0 variables for 2day operation. This
provides uninterrupted JTIDS operation through mllover
(oO:OO:OZOu lu). The JTIDS initialization loads
are set up to use locations 0,2,4, and 6 for crypto period
(day) 0 and locations 1,3,5, and 7 for crypt0 period 1.
Refer to the Users’ Guide to Link-16/lTlDS Crypto,
OPNAVINST C3120.43, Annex D, to determine the
wnect crypt0 period for the day.
19.6.1.3.1 Load Control Unit. TbeLCUisusedto
control the loading ofthe crypt0 variables into the KGV-
8(E2) SDU. The LCU and KYK-13 are connectedt o the
remote fill assembly located in the aircraft crypt0 access
panel. The remote till assembly provides access to the
JTIDS termiml Born the crypt0 access panel. This access
allows the loading of JTIDS crypto variables without
opening the avionics bay containing JTIDS. To load
variables, the KYK-13 fill device (containing the crypt0
variables) and LCU are connected at the cry@ access
panel. The LCU is then used to select the SDU location,
load the variable, and verify the load.
19.6.1.3.2 Data Transfer Device. The AN/CZY-10
DTD is a handheld keyboard device used to control the
loading of the crypt0 variables into the KGVdB SDU
or KGV-8(E2) SDU. The use of the DTD eliminates the
need for KYK-13 and LCU when used with the KGV-
8B SDU. With the KGV-8(E2), the DTD eliminates the
KYK-13 but requires the addition of the LCU. The
DTD interfaces directly with the KGV-B(E2) or KGV-
8B via a cable that co~fxts to the remote till assembly.
The remote fill assembly is located behind the aircrafi
crypt0 accessp anel.T he DTD can thenb e usedt o select
the SDU location and load and verify the crypt0 variables.
Refer to the AN/CZY-10 DTD Users Manual
NSA ON477340, and the User’s Guide To Link-
16/JTlDS Crypto, OPNAVINST C3120.43, Annex D.
19.6.1.4 JTIDS Receiver-Transmitter. The JTIDS
R/‘f provides RF detection and frequency translation
betweent he L-band RF at the antennasa nd the 75MHx
IF at the DDP. The RT also contains an RF power amplifier
that provides 100 watts to each of two antenna
ports or 200 wattst o one antennap ort. Frequencyt uning
control for the RT is provided from the DDP based on a
pseudo random sequence generated by the SDU. The
JTIDS FUT also performs most of the JTIDS tacan processing.
It provides tacan data (range and bearing) in a
digital format to the DPG.
19.6.1.5 Battery Assembly. A battery assembly
containing lithium and nickel-cadmium cells is used to
maintain the following:
1. NICAD
a. Crypt0 variables (STBY - up to 48 hours,
DATA SWNORM - during power transients).
h. Initialization (STBY - 5 minutes, DATA
SILNORM - during power transients).
2. LITBIUM
a. JTIDS chronometer (all modes).
Note
The battery assembly maintains terminal
memory during switchover from ground
power to engine power but does not maintain
terminal synchronixation or communication.
19.6.2 JTIDS Controls. The JTIDS control panel
and DATA LINK MODE panel are shown in Figure
19-13. In addition to the basic panels (ANT SEL, VOLUME,
and the RFCIs) the MFD (TSD formats), TID,
DD, DSS, and DEU enable the crew to interface with
the aircraft weapon system to support JTIDS Rmctions.
19.6.3 Data Storage Set. The DSS is located in the
RIO cockpit. It consistso f a receptacleth at is mountedi n
the a&raft, and a removables torageu nit. The DSU pm
videsstorageoflTlDS initialiiondataandtherecoiding
of engine and CSS data for postflight analysis. Refer to
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F-14D 飞行手册 Flight Manual 3(7)