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THE ELECTRICAL CURRENTS AND VOLTAGES ASSOCIATED WITH THIS EQUIPMENT,
WHETHER SUPPLIED BY AvL Technologies OR OTHERS, ARE DANGEROUS. PERSONNEL MUST
AT ALL TIMES OBSERVE SAFETY REGULATIONS.
The installation, operation, maintenance, and service of this equipment involves risks both to
personnel and equipment and must be performed only by qualified personnel exercising due
care. AvL Technologies shall not be responsible for injury or damage resulting from improper
procedures or from the use of improperly trained or inexperienced personnel performing such
tasks.
ALWAYS DISCONNECT POWER BEFORE OPENING COVERS, DOORS, ENCLOSURES, GATES,
PANELS, OR SHIELDS. ALWAYS USE GROUNDING STICKS AND SHORT OUT HIGH VOLTAGE
POINTS BEFORE SERVICING. NEVER MAKE INTERNAL ADJUSTMENTS OR PERFORM
MAINTENANCE OR SERVICE WHEN ALONE OR FATIGUED.
During installation and operation of this equipment, local building codes and fire protection
standards must be observed.
IN CASE OF EMERGENCY BE SURE THAT POWER IS DISCONNECTED.
Do not remove, short-circuit, or tamper with interlock switches on access covers, doors,
enclosures, gates, panels, or shields. Keep away from live circuits. Know your equipment
and do not take risks.
The following safety procedures are listed to remind those performing any work on the
antenna system that safety rules must be observed. Failure to do so may result in
serious injury or death. Always work safely and in accordance with established
procedures.
Care shall be taken in all operations to safeguard other people as well as property and
to comply with all local safety procedures as established by the customer's site
representative.
All persons performing work on the antenna system shall also comply with the
Occupational Safety and Health Act (OSHA) standards and all other federal state and
local laws, ordinances, regulations and codes relating to designated work.
Unless the customer's representative on site specifically designates an individual
responsible for site safety, the AvL Technologies Site Supervisor shall be responsible for
and establish a site safety program for the AvL Technologies installation work. The site
safety program shall incorporate all AvL Technologies safety procedures and
requirements, including the following:
!
Always remove all power to the system prior to working on the
antenna, the reflector assembly, the reflector backup assembly or
the feed assembly.
!
Always tag all circuits noting that the power is OFF, the date and
your name prior to commencing any work on that system.
DO NOT STAND IN THE DIRECT PATH OF THE FEED SYSTEM
WHEN THE SYSTEM IS TRANSMITTING! DO NOT WORK ON
THE FEED SYSTEM WHEN THE SYSTEM IS ON!
4
WARNING
WARNING
WARNING
SAFETY NOTICE
ALWAYS WORK SAFE!
ELECTROMAGNETIC
RADIATION
6.0
RF WAVEGUIDE AND ELECTRICAL CABLE SYSTEM
6.1 WAVEGUIDE SYSTEM
The waveguide system is suitable for transmit only (13.75 – 14.5 GHz). The VSWR is checked and
tuned to be better than 1.3:1 (-17.7 dB) with an insertion loss of better than .75 dB. The system is
pressurizable to a maximum of 2 psi. The leak rate is checked to be below 100 cc/minute.
Rotary joints are provided on the azimuth and elevation axis and are rated for 1 kW of power. The
polarization axis is crossed with flex-guide rated for 750 watts continuous. Transmit power is input on
the rotating side of the azimuth rotary joint. Therefore the waveguide interface coming from the inside
of the truck must be held stationary on the passenger side of the vehicle.
6.2 CONTROL CABLES
The azimuth and elevation motor power cables are SO 16 gauge, the polarization motor cable is SO
18 gauge, multi-strand wire. The motor power cables are terminated at the motor with insulated, in-line
splices. They are terminated in a 9-pin MS connector at the controller end. The shield is grounded to
the positioner and MS connector. The ground pin is not used.
The sensor and limit switch cables are 22 gauge, shielded, stranded wire. They are terminated into 15
pin connectors. The shield / ground must "float" and not contact the positioner assembly.
6.3 RF AND AUXILIARY CABLES
Two RG59 75ohm coax cables are furnished which run from the feed housing to 10 feet beyond
azimuth interface plane. In addition, a 6 conductor, 22 gauge shielded cable is provided to power the
LNA, operate a waveguide switch, run warning lights, disable vehicle ignition until antenna is stowed,
etc.
7.0 MAINTENANCE
The Patriot Antenna 1.8 MVSAT system is designed so that any wear should never degrade
performance below specifications and no maintenance will ever be required. H owever, since it is
impossible to ascertain or test for all possible environments, the following check-up can be performed
annually to assure never missing "a shot". If any problems are observed, refer to appropriate section.
7.1 ANNUAL INSPECTION
Azimuth
Handcrank in azimuth.
Unit should handcrank easily.
Check for unusual noise in azimuth bearing and azimuth gear box.
Run in azimuth and check for unusual noise in azimuth motor.
Check drive cables for damage.
Check for excessive backlash in gearbox.
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