4.6 V/UHF Flashcards
What modes of operation are available for the ARC-210 radios?
VHF UHF clear/secure HAVEQUICK SINCGARS Link 11 CASS/DICASS VMF (with carry-aboard laptops)
What does SINCGARS stand for?
Single-channel ground and airborne radio systems
___________ and _____________ use frequency-hopping, or rapidly changing frequency, as a means to interfere with jamming and interception for electronic intelligence.
HAVEQUICK and SINCGARS use frequency-hopping, or rapidly changing frequency, as a means to interfere with jamming and interception for electronic intelligence.
Frequency-hopping also prevents…
This also prevents direction finding systems from following the changing frequency long enough to obtain an accurate position.
Is frequency-hopping encryption?
No
While frequency hopping is not encryption, it increases security
How is the sequence and timing for frequency-hopping determined?
The sequence and order of frequency hops is determined by a pseudo-random number generator in each radio, with the hopping being time synchronized using the time distribution system (TDS) time reference.
In addition to frequency hopping, SINCGARS requires
Encryption
In what rack are the VUHF radios located?
E810
In what rack are the CSUs located?
E810
In what rack are the VUHF AIUs located?
E810
What model are the ARC-210 radios?
Rockwell Collins RT-1939(C)
What are RT4, and RT5 ARC-210 radios in E810 used for?
UHF SATCOM
What is another name for VHF anti-jam mode on the ARC-210?
SINCGARS
What does CSEL stand for?
Combat survivor evader locator
Note regarding ARC-210 receive-only mode of operation
The RT provides a receive-only mode of operation from 108.000 through 117.975 MHz (AM).
In the event of a power failure resulting in operation on battery power only, ICS relays deactivate and the flight deck controls
V/UHF-1 via the flight deck interface unit (FDIU) with the UHF radio access button on theflight deck audio control panel (FDACP).
Do the keys zeroize in the ARC-210 radios if power is lost?
No
The radios have internal batteries to keep the key variables saved when power is removed.
When are the ARC-210 radios unintentionally zerioized?
When the radios are removed, tampered with, or when the battery voltage drops below a threshold, the key variables are zeroized.
What are the embedded crypto devices on the ARC-210?
KGV-11
KY-58
KYV-5
KG-84C
What does AIU stand for?
Antenna Interface Unit
What is the function of the VUHF AIUs?
Interfaces with the antenna
Filtering and amplification for VUHF comms in densely populated VUHF
The AIUs provide tunable bandpass filtering, power amplification (transmit mode), and low noise amplification (receive mode) for V/UHF LOS signals. The AIU allows V/UHF LOS communications in a densely populated V/UHF antenna configuration
What is the function of the ARC210 RF switches?
Normal ops, RF switch routes signal through AIU1
Emergency, the RF switch bypasses the AIU when power is lost
Battery powers VUHF1 only when power is lost
The RF switches automatically switch the RF path during emergency power loss. During normal operation, the RF switches route the RF path through V/UHF AIU1. When the aircraft experiences a 115 Vac power loss, the V/UHF AIU-1 is bypassed. This allows the single battery-powered V/UHF-1 radio to operate without the high power requirements of the AIU (Figure 4-94). V/UHF-1 is the only V/UHF radio available during loss of primary power.
_________ is the only V/UHF radio available during loss of primary power.
VUHF1
What is the function of the VUHF control relay?
Routes battery power to the RF switches when power is lost
What are the nomenclature for the VUHF antennas?
VU3
VUL2
VUL3
What is difference between VU3 and VUL2/3?
VU3 - TOP for VUHF2
VUL2 - TOP for VUHF and if L-band IFF
VUL3 - BOTTOM for VUHF and L-band IFF
Warning regarding VUHF stand off?
Various communication antennas radiate high-level RF energy during the communication systems preflight. Failure to maintain proper standoffs may result in exposure to RF radiation
Why does the MCDS interface with the VUHF RTs?
Control and status of each RT
A 1553B data bus interfaces with theMCDS to provide control and status of each RT. Each radio provides an indication to the MCDS when transmitting
In the event of 115 Vac power loss or MCDS failure, is secure comms via VUHF1 available?
The only mode available is clear voice
In the event of a 115 Vac power loss or MCDS failure, the FMC takes over as MIL-STD-1553B Bus controller and directly controls V/UHF-1 only. The pilots select the frequency on the RTP in the flight deck. The only mode available is clear voice. When V/UHF-1 is operating on battery power only, the control relay routes 28 Vdc battery power to V UHF-1 RT. V/UHF-1 AIU is bypassed via this control relay and two RF switches.
T/F TOMS does not support monitoring Guard in conjunction with a tuned frequency (T/R+G).
True
TOMS does not support monitoring Guard in conjunction with a tuned frequency (T/R+G).
4-105 NATIP
What three things are required for HAVEQUICK to function?
TOD
WOD
NET number
What is the nomenclature for the V/UHF radio and how many are there?
ARC-210
Three radios
Can HAVEQUICK can be used with encryption?
Yes
__________ is the primary combat net radio for the US Army
SINCGARS
What four data elements are required to operate SINCGARS
Hop sets/lockouts
Net identification
Net sync time
Transmission security key (TSK)
SINCGARS operates in ____ FM only.
VHF FM
HAVEQUICK can operate in UHF AM or FM but ____ is not recommended for operational
use.
FM
HAVEQUICK can operate in ____ AM or FM but FM is not recommended for operational
use.
UHF
Anti-jam cold-start preset channel ____ is not displayed
A30
