Listen Technologies user manual LR-100Stationary Receiver / Power Amplifier

LR-100 Stationary Receiver / Power Amplifier

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Long cable runs can result in signal degradation due to “loss” characteristics of the cable. At 72 MHz, there is a loss of 2dB per 100 feet of cable and at 216 MHz, there is a loss of 5 dB per 100 feet of cable. (A 3dB loss means half of your power has been lost.) However, it is better to suffer coaxial power loss than to try to shoot your signal through obstacles! Obstacles, especially metal, can create drop-outs or reflections of your signal that will result in poor listening conditions.

Strategies for Maximizing RF Reception with the LR-100

For proper and dependable operation, the LR-100 should receive a strong and consistent signal from the originating transmitter. The following strategies should be used maximize this signal:

a.When designing and installing your system, keep in mind that the location of both the transmitting and receiving antennas is critical to maximizing signal strength.

b.Eliminate or minimize obstructions between the transmitting antenna and the receiv- ing antenna.

c.Minimize the distance between the transmitting and receiving antennas.

d.Move transmitting and receiving antennas away from metal objects.

e.For the LR-100, consider using a remote antenna instead of the supplied 90-degree helical antenna. This will allow you to place the antenna at a location with improved line of site to the transmitting antenna. (You will need to be careful about the type and length of coaxial cable; see the note above.)

f.Place the transmitting antenna as high as possible.

g.Orient both transmitting and receiving antennas vertically.

h.For 216MHz unit only, consider using a gain antenna such as a Yagi type antenna.

CAUTION: When installing antennas, ensure the antenna is clear of power lines.

NOTES: If the RF signal to the LR-100 is too high, the audio will be distorted. This may happen if you are within 40 feet of the LT-800 transmitter. Consider reducing the output power of the transmitter or optionally removing the antenna on the LR-100 (there is sufficient internal antenna inside the LR-100 to receive an adequate signal from the transmitter).

Coaxial cable, connectors, and optional antenna mounting kits are available from Listen. Visit our website for details.

LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West, Suite A Sandy, Utah 84070-2515 USA	8
Phone: +1.801.233.8992 U.S.A. Toll Free: 1.800.330.0891 Fax: +1.801.233.8995 www.ListenTech.com