C 130 0hm Hatch Mount Terminal Datasheet 012
User Manual: C-130
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VMT-1220HM C-130 Hatch-Mount Terminal
Broadband IP In-Flight Satellite Access
e ViaSat VMT-1220 Hatch-Mount Terminal, (VMT-
1220HM), provides roll-on/o Ku-band broadband satcom
for C-130 aircra while on the tarmac or in ight. e
VMT-1220HM series supports channel speeds of up to 10
Mbps from the hub gateway to the aircra and up to 1024
kbps from the aircra to the hub.
e VMT-1220HM features a roll-on/o design for simple
installation and dismantling. A single crew member can
quickly install the terminal in the aircra hatch. It can be
easily removed in ight or during an emergency by one
crew member to allow smoke exhaust or personnel egress.
e VMT-1200HM is provided in ready-to-ship packaging
for easy transporting.
Based on eld-proven and certied ArcLight® technology,
this small aperture terminal operates within FCC and ITU
regulatory guidelines for adjacent satellite interference. e
waveform is robust against intermittent blockage, allowing
applications to run without interruption.
Part of the family of ViaSat ArcLight-based Mobile Satcom
Systems, VMT-1220HM-equipped aircra can seamlessly
coexist with ground vehicle, maritime, and helicopter
terminals on the ArcLight COTM network. is satellite
networking technology and equipment are at the heart
of a Command and Control On-the-Move (C2OTM)
satellite communication system that has been granted
interoperability certication by the U.S. Department of
Defense (DoD) Joint Interoperability Test Command
(JITC). e system is in operational use on multiple C-130
aircra.
is broadband IP access satises many customer needs—
including command and control, emergency response,
streaming video, situational awareness, Intelligence Surveil-
lance, and Reconnaissance (ISR), web access, client-server
applications, and voice, video and data communications —
all while in ight.
The ViaSat® VMT-1220HM Hatch-Mount Terminal provides
affordable, 2-way, “always-on” broadband IP access via satellite
to C-130 aircraft while stationary, taxiing or in flight.
FCC/ITU-compliant On All Satellites
• Reliable Ku-band communication, without harmful adjacent satellite
interference issues, enabled by spread spectrum waveform
• Increased network efficiency through mobile terminal burst transmission
• Optimized capacity enabled by closed loop power control and
advanced network management
Secure Broadband IP Network Access
• Up to 10 Mbps shared forward channel rate (into the aircraft)
• Up to 1024 kbps individual return channel burst rate (from the aircraft)
• Protected IP traffic with HAIPE® Type 1 encryption
Flexible Design for Aircraft Requirements
• Airworthiness certified by USAF
• Roll-on/off capability for use on different C-130 aircraft
• Center hatch standard; forward hatch optional
• Mount/dismountable in minutes by single crew member
while on the ground or in flight
• Integrated Inertial Reference Unit (IRU) provides accurate satellite
tracking in all mission phases
• Operates from aircraft and ground power
• Integrated UPS allows seamless transition from aircraft to GPU
Service Options
• Dedicated or shared hub service through ViaSat or ViaSat's partners
• Organic capability can be provided with purchased hub and
user-supplied transponder bandwidth
SYSTEM AT A GLANCE
VMT-1220HM C-130 Hatch-Mount Terminal
SPECIFICATIONS
Copyright © 2007-2008 ViaSat, Inc. All rights reserved. Printed in the USA. ViaSat, the ViaSat logo, and ArcLight are registered trademarks of ViaSat, Inc. HAIPE is a registered trademark of the National Security Agency. All other trademarks
mentioned are the sole property of their respective companies. Specifications and product availability are subject to change without notice.
Boston 5 Mount Royal Avenue, Marlborough, MA 01752, Tel: +1.508.624.6000, Fax: +1.508.624.9000
Canberra Mailbox 10, 18 Brindabella Circuit, Canberra Airport ACT 2609, Australia, Tel: +61 2 6163 9210, Fax: +61 2 6162 2950
San Diego 6155 El Camino Real, Carlsbad, CA 92009, Tel: +1.760.476.2200, Fax: +1.760.929.3941
Washington, D.C. 1101 Wilson Blvd., Suite 1201, Arlington, VA 22209, Tel: +1.703.248.9662, Fax: +1.703.243.8073
ViaSat, Inc.
6155 El Camino Real
Carlsbad, CA 92009
Tel: +1.760.476.2432
Email: gov.satcom@viasat.com
www.viasat.com
e VMT-1220HM is a complete terminal — just bring your user equipment: laptop computers, telephones, VoIP phones, or any
IP-based equipment. e terminal includes all necessary equipment for powering the unit from the aircra’s 400Hz electrical source.
e VMT-1200HM can also be operated from ground power. A high-precision inertial reference unit is included to provide naviga-
tion data to the antenna control unit for tracking. e inertial reference unit has quick-release mounts underneath the hatch.
e terminal provides black and red routers, HAIPE Type 1 encryption, and TCP/IP acceleration to ensure that applications using
TCP/IP achieve maximum speed over the satellite link.
Other hatch-mount and permanent-mount congurations are available.
OPERATING FREQUENCIES
Transmit: 14.0 – 14.5 GHz
Receive: 11.55 - 12.75 GHz, (optional 11.45 - 12.65 GHz)
MODULATION AND FEC
Forward Link Rx: (O)/QPSK spreading, BPSK data
Return Link Tx: GMSK spreading, BPSK data
Spread Factors: Return Link: 4 to 150; Forward Link: 1 to 23
FEC: R=1/3 Turbo
Min. Req. Eb/No: 1.7 dB (FW Rx); 2.25 (Ret Tx) to achieve
Quasi-Error Free (QEF)
Multiple Access: TDM (FW Rx); CRMA spread ALOHA (Ret Tx)
Freq. Reuse: Paired Carrier Multiple Access (PCMA)
TRANSMISSION RATES
Return Link Tx: 32, 64, 128, 256, 512, 1024 Kbps burst rates
Forward Link Rx: 500 Kbps to 10 Mbps
RF/TRACKING PERFORMANCE
EIRP: 39.5 dBW minimum
G/T: 9 dB/K minimum
Polarization: Selectable horizontal/vertical linear polarization
Coverage: 360° azimuth; 5° – 85° elevation
Tracking: Azimuth Elevation Polarization
Rates 30°/s 20°/s 20°/s
Acceleration
30°/s2 30°/s2 30°/s2
BASEBAND INTERFACES
Data: 10/100BaseT Ethernet
Console: RS-232 and Ethernet (via telnet)
OTHER FEATURES
Encryption: Type 1 HAIPE (KG-250);
FIPS 140-2 (128, 192 or 256 bit AES) optional
Acceleration: TCP/IP Performance Enhancing Proxy
Router: Cisco Systems 2811 router
POWER
Input: 120 Volts Single Phase AC 47-450Hz, max 950 W
ENVIRONMENTAL AND PHYSICAL
Operating Temp: -55° to 65° C (hatch with antenna);
0° to 40° C (IRU and in-aircraft equipment)
Weight: 44 lbs (hatch with antenna);
12 lbs (IRU with quick-release mount);
206 lbs (in-aircraft equipment)
Size: 24"H x 30" base diameter (hatch with antenna);
20"H x 23"W x 36"D (in-aircraft equipment)
