Dielectric TFU Manual de usuario

March 2010. Rev 0

5 September, 2013. Rev 1

Dielectric LLC

22 Tower Road

Raymond, ME 04071

Phone: 800.341.9678

TFU-TYPE SIDE MOUNTED

PYLON ANTENNAS

INSTRUCTION MANUAL

TABLE OF CONTENTS

WARNINGS ................................................................................................................................3

Figure 1............................................................................................................................................................................ 5

DESCRIPTION...........................................................................................................................5

General...................................................................................................................................5

Equipment for Installation......................................................................................................6

Delivery and Storage..............................................................................................................6

Figure 2............................................................................................................................................................................ 7

Inspection ...............................................................................................................................7

ANTENNA UNLOADING AND ASSEMBLY ........................................................................7

Figure 3............................................................................................................................................................................ 8

ASSEMBLY..................................................................................................................................8

Assembly of Center Fed Tee Antenna.....................................................................................8

Figure 4.......................................................................................................................................................................... 10

Figure 5.......................................................................................................................................................................... 11

Figure 6.......................................................................................................................................................................... 12

Lightning Protector Assembly and Mounting. (if a support pole is used)...........................13

Pole Step Installation. (if a support pole is used) ...............................................................13

Fin Installation.....................................................................................................................13

Dipole Installation................................................................................................................13

Radome Installation:............................................................................................................13

FINAL PRE-INSTALLATION PROCEDURES...................................................................14

Top Mounted Obstruction Light (Beacon or Strobe, If a support pole is used )..................14

Inspection of Antenna Components......................................................................................14

ANTENNA INSTALLATION.................................................................................................15

General.................................................................................................................................15

Lifting Antenna.....................................................................................................................16

Figure 7.......................................................................................................................................................................... 16

Top Mounted Support Pole...................................................................................................17

Side Mounted Antenna - Dielectric Supplied Mounts ..........................................................17

Side Mounted Antenna - Mounts Supplied by Others...........................................................17

FINAL TEST.............................................................................................................................18

MAINTENNANCE...................................................................................................................18

ADDRESS:.................................................................................................................................18

APPENDIX 1............................................................................................................................19

PLUMBNESS SPECIFICATION......................................................................................................19

APPENDIX 2.............................................................................................................................19

A325 BOLT INSTALLATION SPECIFICATION...............................................................................20

APPENDIX 3.............................................................................................................................21

HOSE CLAMP AND STAINLESS STEEL BOLT INSTALLATION SPECIFICATION...............................21

WARNINGS

FAILURE TO COMPLY WITH THESE INSTRUCTIONS MAY RESULT IN A SERIOUS

ACCIDENT.

•NEVER CLIMB OR WORK ON THE ANTENNA WHILE RF POWER IS BEING FED

TO IT. WHEN WORKING ON THE ANTENNA ARRANGEMENTS SHOULD BE

MADE WHICH WILL GUARANTEE THAT RF POWER WILL NOT BE APPLIED

WITHOUT SPECIFIC INSTRUCTIONS FROM PERSONNEL ON THE TOWER.

•THE ANTENNA IS A COMPLEX ELECTRICAL DEVICE THAT HAS BEEN BUILT IN

ACCORDANCE WITH STRICT TOLERANCES AND QUALITY CONTROL. PLEASE

HANDLE IT WITH CARE.

•CAUTION: Under no conditions should the spoke short bolts or the spoke short locking

plate bolts to be loosened! Do not paint the bottom of the base flange at the tee contact

surface!

•PLEASE HEED ALL WARNING LABELS ATTACHED TO THE ANTENNA.

Introduction

Many issues need to be considered during the planning, purchase and installation of

a new Dielectric TFU UHF television antenna. The purpose of this book is to assist

the station with the final phase of their project; the delivery, inspection, assembly,

and installation of their antenna. The general features of the Dielectric type TFU

UHF Pylon television side mounted antennas are discussed herein as well as proper

installation, handling, and storage procedures. It is essential for the customer and

their representatives to become familiar with this information.

Each TFU antenna is designed to meet the requirements of a particular installation

therefore exact dimensions are not provided in this book. Drawings containing

dimensional specifications and other pertinent data are furnished with the antenna.

These drawings should be referred to during assembly, erection and testing. Please

contact Dielectric if questions arise.

Figure 1

Antenna Configurations

DESCRIPTION

General

Dielectric side mounted UHF Pylon Television Antennas (TFU) consist of slotted aluminum

pipes with diameters and wall thickness of proper size to provide the specified electrical and

mechanical requirements. These antennas are supplied in one of three basic forms. Figure 1 (a)

shows a typical waveguide input antenna installation, Figure 1 (b) a typical coax input antenna

and Figure 1 (c) shows an antenna side mounted on a pole for tower top installation. Slot

Waveguide Input Antenna

Side Mounted On Tower

1(a)

Pole Mounted Antenna

Mounted On Tower Top

1(c)

Coax Input Antenna

Side Mounted On Tower

1(b)

arrangements on each form vary widely as to number of slot layers and number of slots per

layer depending on the type of radiation pattern desired.

Dielectric may or may not supply mounting brackets. Order must indicate mounting brackets,

otherwise none will be supplied.

The gas stops on all configurations is located at the input of the tee allowing for pressurization

up to the antenna.

Equipment for Installation

Dielectric side mounted TFU Antennas, as supplied, require minimal assembly at the tower site.

Standard mechanics tools will be required for any field assembly of the antenna. Special tools

will be supplied if they are required. The assembly prior to lifting may include re-assembly of

the antenna halves (see page 8). Antennas equipped with a radome may have some of the

radome panels removed for shipping. These will need to be re-installed either prior to, or after,

erecting the antenna.

The structural bolts, nuts and lockwashers required to connect the support pole to the tower top

are supplied with the antenna.

Delivery and Storage

The side mounted TFU antennas are typically shipped on shipping deck saddles or blocks on a

flat bed trailer. In Figure 2 a typical pole mounted antenna is shown ready for delivery. The

antenna and trestles are strapped to the bed of the trailer while spare parts and other accessories

are packed in cartons and shipped with the antenna. One of the boxes contains a shipping list

and information to be used during installation of the antenna. The shipping trestles are not

returnable and can be used for temporary storage of the antenna.

To store the antenna a space on level ground large enough to accommodate the antenna should

be prepared. No parts of the antenna should be in contact with the ground during storage. The

antenna should be protected, kept clean and dry.

Figure 2

Antenna Loaded on a Truck

Inspection

On arrival, the antenna should be inspected and checked for any damage resulting from

shipping or handling. Examine the contents of all cartons. Check that the number of items

agrees with the quantities shown on the bill of lading and shipping list. After checking, replace

all parts in their respective cartons until ready for use. Be careful not to lose or destroy any

identifying tags attached to the various parts or items. Parts removed to facilitate the shipping

are located in the cartons and can be installed prior to or after installation. If any parts for which

spares are not supplied are found to be damaged or missing advise Dielectric.

ANTENNA UNLOADING AND ASSEMBLY

Appropriate equipment should be used to safely unload and handle the antenna, components

and cartons. For weight of the antenna refer to the stamped nameplate at the antenna base or the

antenna’s mechanical specification sheet.

As shown on Figure 3, each antenna has lifting lugs for handling and installation. The antenna

has one main lug used for lifting the antenna to the tower top and two horizontal handling lugs.

Care must be exercised when removing the antenna from the trailer to avoid crushing any parts

such as vertical dipoles, radomes, trim strips or slot covers.

Figure 3

Unloading Detail

ML = Main Lifting Lug

HL = Horizontal Lifting Lug

Assembly

Assembly of Center Fed Tee Antenna

These instructions apply only to antennas shipped in two sections; they also should be used for

reference if antenna must be taken apart in the field. Refer to the following two figures for

details.

1. Extreme care should be exercised when handling each section to avoid damage to the flange

mating surfaces, inner conductor connectors, radome and related components. The antenna is a

complex electrical device that has been built in accordance with strict tolerances and quality

control. Please handle it with care.

2. Remove the two sections of the antenna from the truck and position them end-to-end

horizontally, keeping them as straight and leveled as possible; use blocks and saddles as

necessary.

Orient the two sections by aligning the match-marks on the flanges. Looking from the top of

the antenna, down towards the base, the match mark on the top section should be kept slightly

CHAINPULLER/HOIST

3rd LOAD LINE

2nd LOAD LINE

MAIN LOAD LINE

MOUNT LUG

ML LUG

HL LUG

counter-clockwise from its matching mark on the TEE until step 4. Gently remove the

shipping protection materials from the antenna sections.

3. Reach up into the bottom of the top section. Gently pull the top section inner conductor out

until it comes to a stop. It may be necessary to remove the top weather cap of the top section

and push the inner as it may move with considerable resistance; its travel is limited by a stop

located inside the top of the antenna. Temporarily place the large aluminum spacer around the

extended inner conductor. Align the connector of the top section with the inner conductor of

the tee; push the two together until the female tube rests against the shoulder of the male

connector. Lock the joint by tightening the three set-screws that are visible on the outside of

the female portion of the connector. Use a 3/16 inch Allenwrench.

4. Gently slide the outer conductors of the two sections together, holding the aluminum spacer

against one of the flanges. As the sections come together, be careful to maintain alignment

between the antenna section and the tee; if they are not directly in line, the tee inner may be

damaged. Align the entire match mark; the tube of the top section must be aligned

with the top section swivel flange, rotate the swivel flange as necessary. Avoid rotating the top

section tube counter-clockwise as viewed looking down from the top section. All components

must be aligned for the antenna to be correct. A scribe line in the middle of the match mark

should be used for the final alignment. Refer to the similar markings between the Tee and the

bottom section. Install the mounting lug and all the flange hardware checking that the

appropriate lengths are used in the appropriate places. Tighten hardware to the torque listed on

Dielectric specification A88212 in Appendix 3.

5. Once assembled on the ground, the antenna may be lifted as one unit to its position on the

tower by following the lifting instructions detailed later .

Figure 4

Coax Input Tee

INPUT TEE

SET SCREWS(3)

ANTENNA

INNERCONDUCTOR

ANTENNA

OUTER

SPACER

SEE DETAIL 1.

ELECTRICAL CONTACT

SEE DETAIL 2.

APPROX.

DETAIL 1.

BE SURETO SEATSET

SCREW ASSHOWNIN

3PLACES AROUND

INNERCONDUCTOR.

DETAIL 2.

PRIMARY ELECT. CONTACT.

USE EXTREMECAUTION SO

THATNEITHEROFTHESE

SURFACESARE DAMAGED.

TEE INNER

SEE DETAIL 1.

SET SCREWS(3)

4-6"

TOP HALF

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