Related Manuals for AOR LA400
Summary of Contents for AOR LA400
- Page 1 MAGNETIC LOOP ANTENNA A400 Instruction manual AOR Ltd. Authority On Radio Communications...
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Page 3: Table Of Contents
Table of contents 1. Introduction ......... 2. -
Page 4: Introduction
1. Introduction Thank you for purchasing the LA400 Magnetic loop antenna. To get the best possible results from your LA400, we recommend that you read this manual and familiarize yourself with the antenna. Since the invention of this revolutionary concept by KOLSTER in 1915, loop antennas, especially of the active type, have also been widely used by the military in the 70’s, before... -
Page 5: Included In This Package
2. Included in this package Description ① Loop element ② Control box ③ Control cable (LAN type) 30cm ④ 1m coaxial cable (RG-58U with BNC (F)/BNC (F) connectors) ⑤ AC power supply ⑥ This printed instruction manual ③ ③ ③ ③ ①... -
Page 6: Hardware Setup
3. Hardware setup Caution! LA400 is a RECEIVE ONLY antenna. Do not transmit with it or its circuitry will be severely damaged, maybe even beyond repair. As explained on the diagram below, attach the loop element to the control box, then connect the coaxial and control cables. -
Page 7: Operating Instructions
4. Operating instructions ◎ Connect the AC power supply and push the red power button on the control box. A blue LED will light up. ◎ Tune your receiver to the desired frequency. ◎ Now you need to select one of the 5 available band ranges, using the band switch numbered from 1 to 5. - Page 8 For example for band switch position 3 (3MHz to 10MHz), it would be roughly peaked on 6.5MHz. Tuning is most critical above 3MHz. For best performance of LA400 and optimal reception conditions, make sure the selected band is appropriate for the received frequency, and search for the signal peak with the tuning know.
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Page 9: Remote Tuning System
With these controls now on the control box and by using the optional LA400-RCK extension cables, it is now possible to tune the antenna while the loop element is setup at the most reception friendly location possible (window, covered balcony, etc...). -
Page 10: Directivity Of A Loop Antenna
180 degrees. The null in reception that is located at right angles to the plane of the loop can be used for interference reduction. On the other hand, received signal strength is greatest in the directions indicated by the arrows. Horizontal radiation pattern of LA400 NULL NULL NULL: Angle from which magnitude of the radiation pattern decreases to zero. -
Page 11: Characteristics Of A "Shielded" Loop Antenna
By these principles, LA400 responds to the magnetic field rather than the electric field, thus efficiently isolating the low frequency electrostatic noise from the distant signal to be received. -
Page 12: Options
MC-600 Impedance matching transformer Passive impedance matching transformer interface which allows your LA400 to be connected to any antique receiver with a 600 antenna terminal. Supported frequency range: 10kHz to 30MHz. MC-600 has the same isolation feature than the GT-1 accessory described below. -
Page 13: Specifications
Control cable (LAN type) 30cm Supplied AC power supply accessories BNC (F)/BNC (F) RG-58U coaxial cable (1m) Printed user manual LA400 is NOT intended for transmit purposes! Not waterproof, use only indoors. Product specifications and design subject to change without prior notice. - Page 14 ® AOR Ltd. 2-6-4 Misuji, Taito-ku, 111-0055 Tokyo, Japan Authority On Radio Communications www.aorja.com (June 11, 2012)