Drive System

Voltage and

Current Checks

Step 1

Step 2

Step 3

•Visually inspect all mechanical parts for freedom of operation with no misalignment,

binding or interference. Check all cabling for sufficient slack to prevent cable strain as well as adequate restraint to prevent abrasion or chaffing during antenna and feed movement.

•Check security of antenna mounting and interconnecting assembly hardware. Be cer-

tain all electrical grounding connections (including cross-axis grounding straps) are intact and secure, not corroded or broken. Thoroughly clean any noticeable corroded portions of grounding cables, unplated portion of universal terminals and corresponding mounting surfaces using a wire brush. Replace rather than tighten any loose A-325 structural hardware. The hardware distorts at initial installation and once loosened will not maintain the required high strength friction connection. All other assembly and instal- lation hardware should be tightened to its original torqued condition. When installing new structural hardware, do not use a wrench with a lever arm longer than two feet.

•Examine painted aluminum and galvanized surfaces and tough-up where required.

At the conclusion of the installation procedure prior to turning the system over to the sta- tion facility, an installation acceptance check off sheet was prepared and duly signed off if installed by Andrew crew. Part of this check off included voltage readings retaken to determine if proper voltage was available. Current readings were also taken as a refer- ence for future comparison to serve as a troubleshooting aid in determining possible equipment degradation and shortened life. Any current reading taken during the follow- ing procedure that varies by more than five percent from the pre-established reference values necessitates troubleshooting the particular system involved to determine the cause and required corrective action.

Approximately every three months and during a period of down time, disconnect as applicable the RF transmitter and all power supplies. The main disconnect switch in the main load center box at the antenna site must be in the ON position and the LOCAL/REMOTE switch in the local control motor drive controller must be in the LOCAL position.

Open the outer local control/motor drive controller door at the antenna site to gain access to the conductors supplying power to the azimuth, elevation, and polarization drive motors.

NOTE: During the following procedures, the antenna drives (azimuth, elevation, and polarization) will be powered to rotate the antenna and feed in both directions of travel. Check that this condition can be tolerated from a safety as well as an operational stand- point, and that the electrical limits are not reached before the testing is concluded. Reaching an electrical limit before concluding a test necessitates rotating the antenna or feed in the opposite direction a sufficient distance to permit retesting in the desired direction.

Turn the FEED CCW/OFF/CW switch to either the CW or CCW position and while the feed is rotating, carefully use a clamp on ammeter in accordance with the ammeter man- ufacturer’s instructions to take current readings off each of the three conductors (phases) connected to the load side of the polarization motor circuit breaker. Record the current draw in the equipment log and compare the readings to the reference values entered in

49

Preventive Maintenance

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Andrew ES76PK-1 installation instructions Drive System Voltage Current Checks Step
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ES76PK-1 specifications

The Andrew ES76PK-1 is a robust and highly efficient satellite communication antenna designed for both commercial and military applications. Its innovative design and advanced features make it an exceptional choice for high-performance connectivity.

One of the standout characteristics of the ES76PK-1 is its impressive gain. With a gain of approximately 76 dBi across a wide range of frequencies, it ensures optimal signal reception and transmission even in challenging environments. This high gain makes it ideal for applications requiring reliable long-distance communication, such as remote site operations or disaster recovery efforts.

The construction of the ES76PK-1 also prioritizes durability and resilience. Built with sturdy materials, this antenna is resistant to harsh weather conditions, including high winds, rain, and extreme temperatures. Its lightweight yet robust design allows for easier installation and maintenance, making it suitable for both fixed and mobile setups.

In terms of technology, the Andrew ES76PK-1 leverages advanced polarization techniques, which enhance its ability to transmit and receive signals effectively. This polarization capability ensures minimal signal degradation and interference, providing users with consistent and high-quality communication links. Furthermore, the antenna supports multiple frequency bands, thus offering flexibility in deployment and compatibility with various satellite systems.

The antenna's design incorporates a high level of precision engineering. This not only contributes to its excellent performance but also allows for fine azimuth and elevation adjustments. This feature is crucial in aligning the antenna accurately with satellite signals, further improving the quality of service for users.

Another key aspect of the Andrew ES76PK-1 is its compatibility with a range of RF systems. This versatility makes it a favored choice among service providers and enterprises looking to implement or upgrade their satellite communication infrastructure.

In summary, the Andrew ES76PK-1 stands out in the competitive landscape of satellite communication technologies. With its high gain, durable construction, advanced polarization, and compatibility with various systems, it meets the stringent demands of modern communication needs. This antenna is an excellent investment for anyone looking to achieve reliable and efficient satellite connectivity.
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