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<html><head><title>Delta Electronics, Inc. RAS-10A</title></head>
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<h2>Model RAS-10A<br>
Receiving Antenna System</h2>
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<h4>Description</h4>
The RAS-10A Receiving Antenna System is a horizontal dipole antenna system offering exceptional performance in the 3 to 30 MHz range. The antenna system consists of a forty foot fan dipole antenna terminating in a special coupler/compensator unit. In some applications, particularly in urban areas, the local man-made radiation is the major cause of poor signal to noise ratios. This degradation can be reduced by minimizing the direct circulation of noise currents within the antenna system. A balanced, horizontal dipole antenna, such as the RAS-10A, has a high attenuation to coaxial sheath currents, resulting in an improved S/N ratio in the presence of local radiation.
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The coupler/compensator unit matches the impedance of the antenna to the standard 75 ohm coaxial impedance. This unit is located in the center of the antenna in a weather proof container and has been specifically designed to withstand high level radiation from nearby transmitters.
<h4>Installation</h4>
The RAS-10A mounts as a horizontal fan array with the coupler at the center. The supplied dipole antennas are each 20 feet in length and are designed to be installed with a 2 foot separation at the ends. The antenna system height above ground is dependent on the particular application. A minimum height of 20 feet is recommended.
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<h4>System Components and Order Numbers</h4>
The standard Model RAS-10A is supplied as a complete receiving antenna system with antenna, coupler/compensator unit, coupler mounting hardware and mating Type N connector. Systems without the antenna and/or without the mating Type N connector are optionally available. Replacement coupler units are also available. Order numbers for these different configurations are as follows:
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962-0003-001 RAS-10A Receiving Antenna System<br>
962-0003-002 RAS-10A without antenna and mating connector<br>
962-0003-003 RAS-10A without mating connector<br>
962-0003-004 RAS-10A coupler/compensator unit only<br>
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<center><h4>SPECIFICATIONS</h4>
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<tr valign=top><td width=51%><b>Frequency Range:</b><br>
3 to 30 MHz
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<b>Frequency Response:</b><br>
A one volt per meter impinging field will produce 1.8 volts ±3 dB into a 75 ohm load.
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<b>Power Rating:</b><br>
100 watts input at coupler antenna terminals for 15 minutes at 25° C ambient with coupler terminated into 75 ohm load.
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<b>Load Impedance:</b><br>
75 ohms
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<b>Antenna:</b><br>
40 foot two wire fan dipole. Radiation patterns are substantially that of dipole cut to frequency.
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<b>Output Connector:</b><br>
Type N (Mating UG-603A/U supplied)
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<b>Weight:</b><br>
Coupler - 12 ounces
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For additional information on any of our products, please contact <a href="mailto:[email protected]">Sales</a> to discuss your particular requirements:<br>
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<td><strong>Delta Electronics, Inc.<br>
5730 General Washington Drive<br>
P. O. Box 11268<br>Alexandria, VA 22312<br><br></strong></td>
<td><strong>Phone: (703) 354-3350<br>
U.S. Toll Free: 1-800-8-DELTA-8 (1-800-833-5828)<br>
Fax: (703) 354-0216<br>
<address>www.deltaelectronics.com</address>
Email: <a href="mailto:[email protected]">[email protected]</a></strong></td>
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<font size=1>The Delta Electronics logo is a registered trademark of Delta Electronics, Inc.</center></font>
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