Radio Shack TV • FM High Gain Mast-Mount Antenna UHF/VHF/FM Amplifier with Switchable FM Trap User manual

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Radio Shack TV • FM High Gain Mast-Mount Antenna UHF/VHF/FM Amplifier with Switchable FM Trap User manual | Manualzz

15-1109.fm Page 1 Thursday, July 15, 1999 10:41 AM

Cat. No.

15-1109

TV FM High Gain Mast-Mount Antenna UHF/VHF/FM

Amplifier with Switchable FM Trap

This amplifier with Switchable FM Trap provides up to 30 dB amplification of signals from outdoor VHF, UHF, FM, or combination antennas. This high degree of amplification is necessary when your antenna is pulling in signals from weak or distant stations, when it is positioned 100 feet or more from the

TV, or when a single antenna supplies signals to several units — TVs, VCRs, or FM receivers.

Special Automatic Protection Cir-

cuit — guards against cable shorts and prevents damage to connected receivers.

Surface-Mounted Components — assure long-term reliability.

Please read and keep all of the instructions and warnings contained in this Owner’s Manual, in the supplied

“Safety Instructions” sheet, and on the product.

Note: This unit only amplifies signals; it does not enhance distorted or noisy signals.

FEATURES

Warning: To prevent fire or shock hazard, do not expose this power supply to rain or moisture.

Separate Amplifier and Power Sup-

ply Units — maximize operational efficiency.

CAUTION

RISK OF ELECTRIC SHOCK.

DO NOT OPEN.

!

Built-In Adjustable Gain Control — reduces signals by up to 10 dB to prevent overload and allow custom matching of amplification to signal strength.

CAUTION: TO REDUCE THE RISK OF

ELECTRIC SHOCK, DO NOT REMOVE

COVER OR BACK. NO USER-SERVICE-

ABLE PARTS INSIDE. REFER SERVIC-

ING TO QUALIFIED PERSONNEL.

Switchable FM Trap — reduces or eliminates FM interference, which appears as a herringbone pattern on the

TV screen.

This symbol is intended to alert you to the presence of uninsulated dangerous voltage within the product’s enclosure that might be of sufficient magnitude to constitute a risk of electric shock. Do not open the product’s case.

Power Indicator — lights when the amplifier is operating, and goes out if power fails or the connecting cable shorts.

!

This symbol is intended to inform you that important operating and maintenance instructions are included in the literature accompanying this product.

© 1997 Tandy Corporation.

All Rights Reserved.

RadioShack is a registered trademark used by Tandy Corporation.

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INSTALLATION

Cautions:

• For outdoor antennas, install an antenna grounding system, as shown in the supplied sheet.

• The power supply has a protection circuit that shuts down the amplifier if there are stray wires between the power supply and the amplifier. If the amplifier does not operate, check for stray wires.

Proper operation should resume when the problem is corrected.

Installing the Amplifier

Antenna Terminals

Matching

Transformer

Amplifier

Weather

Boots

Standoff

Drip

Loop

Attach the other end of this cable to the antenna’s terminals, using the supplied 300-to-75 ohm matching transformer if necessary.

Notes:

• Be sure to fully seat the weather boots provided on the coaxial cable over their corresponding

F-connectors.

• Leave a slight amount of slack

(called a drip loop) where the cable attaches to the amplifier.

3. Choose a length of cable long enough to reach from the antenna to your TV or receiver. RadioShack stores have various precut lengths of cable with boots and connectors in place. If you choose to assemble your own coaxial cable, use the supplied weatherboot at the amplifier’s connections.

Standoff

1. Mount the amplifier on the antenna mast, about 12 inches below the antenna. Position the Ubolt and mounting bracket as shown. Then install washers and tighten the nuts securely.

2. Attach one end of the provided coaxial cable to the amplifier’s Fconnector labeled TO ANTENNA .

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Attach one end of a 75-ohm coaxial cable to the amplifier’s F-connector labeled TO POWER SUPPLY .

Note: Do not splice the cable or install any in-line devices such as splitters or filters. You can install a grounding block (Cat. No. 15-909), which dissipates DC current and provides a connection point for a static discharge ground rod.

4. Use either standoffs or weatherresistant electrical tape to secure the cable to the antenna mast.

Use standoffs to secure the cable to the building as you route the cable to your TV.

Notes:

• If you use a power rotator for your antenna, leave enough cable slack for unrestrained rotation of the upper section.

• Leave a slight amount of slack

(called a drip loop) where the cable enters your house.

• Be sure to weatherproof all connections, using plastic electrical tape or a coaxial sealant.

Installing the Power Supply

Notes:

• The power supply is designed for indoor use only.

• Do not mount the unit to any electrical equipment or your TV set.

Choose a location for the power supply near the TV or FM receiver, and close to a standard AC outlet.

1. Drill a hole at the desired location and thread the supplied screw into the hole until its head extends about /

8

inch from the wall.

2. Align the power supply’s keyhole slot with the screw head and slide the power supply down.

3. Connect the coaxial cable from the amplifier to the power supply’s

FROM AMPLIFIER terminal. Do not overtighten the connector.

4. Connect one end of a short length of cable to the power supply’s TO

TV terminal.

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Drip Loop

TV

15-1140

VHF

UHF

FM Receiver

15-1252

5. Connect the other end of the short cable to the TV or FM receiver.

• To connect to one TV or FM receiver with a 75-ohm input, connect the cable directly to the input.

• To connect to one TV or FM receiver with a 300-ohm input, use a 75-to-300 ohm transformer (Cat. No. 15-1140).

• To connect to UHF/VHF TV terminals and an FM receiver, use a VHF/UHF/FM splitter (Cat.

No. 15-1252).

Caution: Do not reverse the TO TV and FROM AMPLIFIER connections. Voltage is present at the

FROM AMPLIFIER terminal, which might damage an improperly connected receiver.

6. When all connections are made and double-checked, plug the power supply into a standard AC outlet.

Caution: To prevent electric shock, match the wide blade of the amplifier’s AC plug to the wide slot of a standard AC outlet and insert the plug fully.

4

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Multiple TV Connections

The power supply’s output, labeled TO TV , can supply a signal to more than one

TV. Connect a Four-Set Hybrid Splitter (Cat. No. 15-1142) to TO TV and follow the splitter’s owner’s manual to make the connections to more than one audio/video device.

To TV

To TV To TV

To Splitter

Coupler

Drip Loop

5

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OPERATION

• Rotate GAIN toward MAX for weak or distant stations.

• Rotate GAIN toward MIN for strong or nearby stations.

Using the FM Trap

If the TV picture contains wavy or herringbone-patterned dark lines, slide FM

TRAP to IN to reduce or eliminate this interference.

If you have the amplifier connected to an FM receiver and a TV, set FM TRAP to OUT when you listen to the radio.

Note: If FM TRAP has no effect on the picture, the interference might be from a source other than FM. You might need additional traps.

Using the Gain Control

If your TV receives too strong a signal, the picture tears and becomes unstable, and FM sound can become distorted. To prevent this, use a small flathead screwdriver to rotate GAIN to provide the maximum signal amplification without overload.

Automatic Protection Circuit

The amplifier contains circuitry to guard against damage caused by a short anywhere in the cable from the amplifier to the receiving unit. A short between the amplifier and the power supply causes the power supply to shut down automatically, turning off the power indicator and amplifier. If you suspect a short, follow these steps to correct it.

1. Unplug the power cord and disconnect the coaxial cable you suspect is shorted.

2. Wait 10 minutes for the power supply to reset. During this time, repair or replace the cable.

3. With the cable disconnected, plug in the power cord.

4. If the power indicator lights, unplug the power supply, reconnect the cable, and plug in the power cord again. The power indicator should light again. If the power indicator still does not light, take the unit to your local RadioShack store for assistance.

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TROUBLESHOOTING

If you have poor FM radio reception, be sure FM TRAP is set to OUT .

If the reception is poor on all units connected to the amplifier:

• Be sure the power supply is plugged into an AC outlet which has power.

• Check all connections between the antenna, the amplifier, and the power supply.

If you have poor, or no, reception on only one unit of a multiple receiver system:

• Check all F-connectors for damage. In particular, examine the center pins.

• Be sure the F-connectors are properly attached.

• Verify that the TV or FM receiver operates properly when used with other signal sources.

SPECIFICATIONS

Frequency Response

(FM Trap).............. Greater than 25 dB

Attenuation at 95 MHz Typical

Gain .................... 30 dB (VHF or UHF)

Gain Control ................ 0 to 10 dB Cut

Specifications are typical; individual units might vary. Specifications are subject to change and improvement without notice.

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Limited Ninety-Day Warranty

This product is warranted by RadioShack against manufacturing defects in material and workmanship under normal use for ninety (90) days from the date of purchase from RadioShack companyowned stores and authorized RadioShack franchisees and dealers. EXCEPT AS PROVIDED

HEREIN, RadioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES,

INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE,

ARE LIMITED IN DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES

CONTAINED HEREIN. EXCEPT AS PROVIDED HEREIN, RadioShack SHALL HAVE NO LIABIL-

ITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER PERSON OR ENTITY WITH RE-

SPECT TO ANY LIABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE

OR PERFORMANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WAR-

RANTY, INCLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVE-

NIENCE, LOSS OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT,

SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEEN AD-

VISED OF THE POSSIBILITY OF SUCH DAMAGES.

Some states do not allow the limitations on how long an implied warranty lasts or the exclusion of incidental or consequential damages, so the above limitations or exclusions may not apply to you.

In the event of a product defect during the warranty period, take the product and the RadioShack sales receipt as proof of purchase date to any RadioShack store. RadioShack will, at its option, unless otherwise provided by law: (a) correct the defect by product repair without charge for parts and labor; (b) replace the product with one of the same or similar design; or (c) refund the purchase price. All replaced parts and products, and products on which a refund is made, become the property of RadioShack. New or reconditioned parts and products may be used in the performance of warranty service. Repaired or replaced parts and products are warranted for the remainder of the original warranty period. You will be charged for repair or replacement of the product made after the expiration of the warranty period.

This warranty does not cover: (a) damage or failure caused by or attributable to acts of God, abuse, accident, misuse, improper or abnormal usage, failure to follow instructions, improper installation or maintenance, alteration, lightning or other incidence of excess voltage or current; (b) any repairs other than those provided by a RadioShack Authorized Service Facility; (c) consumables such as fuses or batteries; (d) cosmetic damage; (e) transportation, shipping or insurance costs; or (f) costs of product removal, installation, set-up service adjustment or reinstallation.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

RadioShack Customer Relations, Dept. W, 100 Throckmorton St., Suite 600, Fort Worth, TX 76102

We Service What We Sell

3/97

9/97

RadioShack

A Division of Tandy Corporation

Fort Worth, Texas 76102

Printed in the USA

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