Installation Instructions Chapter 3

ManualsBrandsUBS-Axcera ManualsElectronics100-Watt UHF Transmitter

UHF Analog Driver/Transmitter Chapter 3, Site Considerations,

Installation and Setup Procedures

LX Series, Rev. 0 3-1

Chapter 3

Site Considerations, Installation and Setup Procedures

There are special considerations that

need to be taken into account before the

Innovator LX Series analog

driver/transmitter can be installed. For

example, if the installation is completed

during cool weather, a heat-related

problem may not surface for many

months, suddenly appearing during the

heat of summer. This section provides

planning information for the installation

and set up of the driver/transmitter.

3.1 Site Considerations

The transmitter requires an AC input line

of 117 VAC/220 VAC @ 5 amps for the

10W transmitter and driver or 117

VAC/220 VAC @ 10 amps for the 100W

Transmitter. The transmitter is factory

set for 110 VAC or 230 VAC operation.

The LX Series Analog Transmitters are

designed and built to provide long life

with a minimum of maintenance. The

environment in which they are placed is

important and certain precautions must

be taken. The three greatest dangers to

the transmitter are heat, dirt, and

moisture. Heat is usually the greatest

problem, followed by dirt, and then

moisture. Over-temperature can cause

heat-related problems such as thermal

runaway and component failure. Each

amplifier module in the transmitter

contains a thermal interlock protection

circuit that will shut down that module

until the temperature drops to an

acceptable level.

A suitable environment for the

transmitter can enhance the overall

performance and reliability of the

transmitter and maximize revenues by

minimizing downtime. A properly

designed facility will have an adequate

supply of cool, clean air, free of airborne

particulates of any kind, and no

excessive humidity. An ideal environment

will require temperature in the range of

40° F to 70° F throughout the year,

reasonably low humidity, and a dust-free

room. It should be noted that this is

rarely if ever attainable in the real world.

However, the closer the environment is

to this design, the greater the operating

capacity of the transmitter.

The fans are designed and built into the

transmitter will remove the heat from

within the modules, but additional means

are required for removing this heat from

the building. To achieve this, a few issues

need to be resolved. The first step is to

determine the amount of heat to be

removed from the transmitter room.

There are generally three sources of heat

that must be considered. The first and

most obvious is the heat from the

transmitter itself. This amount can be

determined for a 100W transmitter by

subtracting the average power to the

antenna (69.5 watts) from the AC input

power (675 watts) and taking this

number in watts (605.5) and then

multiplying it by 3.41. This gives a result

of 2,065, the BTUs to be removed every

hour. 12,000 BTUs per hour equals one

ton. Therefore, a 1/4-ton air conditioner

will cool a 100W transmitter.

The second source of heat is other

equipment in the same room. This

number is calculated in the same way as

the equation for BTUs. The third source

of heat is equally obvious but not as

simple to calculate. This is the heat

coming through the walls, roof, and

windows on a hot summer day. Unless

the underside is exposed, the floor is

usually not a problem. Determining this

number is usually best left up to a

qualified HVAC technician. There are far

too many variables to even estimate this

number without reviewing the detailed

drawings of the site that show all of the

construction details. The sum of these

three sources is the bulk of the heat that

must be removed. There may be other

Summary of content (15 pages)

PAGE 1
UHF Analog Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Chapter 3 Site Considerations, Installation and Setup Procedures There are special considerations that need to be taken into account before the Innovator LX Series analog driver/transmitter can be installed. For example, if the installation is completed during cool weather, a heat-related problem may not surface for many months, suddenly appearing during the heat of summer.
PAGE 2
UHF Analog Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures sources of heat, such as personnel, and all should be taken into account. Now that the amount of heat that must be removed is known, the next step is to determine how to accomplish this. The options are air conditioning, ventilation, or a combination of the two. Air conditioning is always the preferred method and is the only way to create anything close to an ideal environment.
PAGE 3
UHF Analog Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures higher than four feet above the floor. The inlet must be located where dirt, leaves, snow, etc., will not be carried in with the cooling air. 5. The exhaust should be located as high as possible. Some ducting is usually required to insure the complete flushing of heated air with no stagnant areas. 6.
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UHF Analog Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures always good practice to consult the manufacturer when questions arise. Axcera can be contacted at (724) 8738100. Figure 3-1. 1 kW Minimum Ventilation Configuration 3.2 Unpacking the Chassis w/modules, bandpass and trap filters The modules are mounted to the chassis assembly with slides that are on the top and the bottom of the modules.
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UHF Analog Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures NOTE: To pull out the power amplifier module for replacement purposes, the input and output coaxial cables must first be removed from the rear of the chassis assembly. Connect the bandpass filter and trap filter to the output of the chassis assembly. Figure 3-2. Front and Rear View Reconnection Drawing Connect the transmission line for the antenna system to the output of the trap filter.
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UHF Analog Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Figure 3-3: Rear View of LX Series Analog Transmitter J25 J21 TB02 TB30 J18 TB31 J9 J6 J24 J11 J4 J8 J23 J19 J32 J5 J34 Table 3-1: Rear Chassis Connections for the LX Series Analog Transmitter.
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UHF Analog Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures 3.5.2 Front Panel Screens for the Exciter/Amplifier Chassis Assembly characters are special characters used to navigate up or down through the menu screens. Display text flashes on discrete fault conditions for all screens that display a fault condition.
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UHF Analog Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Table 3-5: Menu 11 - Error List Access Screen S Y S T E E R ↑ R O R M E L I ↓ R R S T E N O R S D I 6 S P L A T Y S T B This screen of the transmitter shows the current number of errors and provides operator access to view the error list. This is the entry point to Menu 20. If ENT is pushed, go to Menu 20. If the ↓ key is activated the system changes to Menu 12, go to Menu 12.
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UHF Analog Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Table 3-9: Menu 30 - Transmitter Device Details Screen S X Y S M T T R E M I N D E O T P A E I R L A P O ↑ W E R S U P P L Y : S T E O M O D E E S C K ↓ This screen of the transmitter allows access to the transmitter parameters of installed devices. The system is configured to know which devices are present. Current values for all installed devices are shown.
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UHF Analog Driver/Transmitter System Component Chapter 3, Site Considerations, Installation and Setup Procedures Parameter Ext. Power Amplifier Modules Details (Only in high power systems) Normal Faulted (Blinking) FORWARD POWER REFLECTED POWER AMP 1 CURRENT AMP 2 CURRENT TEMPERATURE CODE VERSION xxx% xxx% xx.xA xx.xA xxC x.x xxx% xxx% xx.xA xx.
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UHF Analog Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Table 3-14: Menu 40-2 - Transmitter Set-up: Frequency Select Screen T 0 R 3 A N F S R M I E Q T U T A B ↓ E ↑ L T E ( E N R C S E S T E L U E P C O R C U S T O M + ) E S C Y ( T - ) This screen of the transmitter is allows access to transmitter frequency set-up parameters. The choices of this screen are 'TABLE' or 'CUSTOM'.
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UHF Analog Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Table 3-18: Menu 40-6 - Transmitter Set-up: Serial Address Screen T 0 R 4 A N S S E ↑ M I R I T A ↓ T L E R A ( + ) D S D E R T E E S C S U S P 5 ( - ) This screen allows the user to set the serial address of the transmitter. The default address is 5. This value and all other set-up parameters, are stored in non-volatile memory.
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UHF Analog Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures Table 3-22: Menu 40-10 - Transmitter Set-up: System Reflected Power Calibration T 0 R 6 A N S S Y M I S T T E T E M R E F ↓ E C T ( + ) ↑ L R C A S L P W R E E I S T B R U A P T E X . X % ( - C ) This screen is used to adjust the calibration of the system's reflected power.
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UHF Analog Driver/Transmitter Chapter 3, Site Considerations, Installation and Setup Procedures output sets a linear circuit voltage that is controlling a non-linear power circuit. VIDEO LOSS: This indicates the loss of Video to the modulator, when Red. If a problem occurred during the setup and operation procedures, refer to Chapter 5, Detailed Alignment Procedures, of this manual for more information. OVER MOD: This illuminates Red when the video is overmodulated.
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UHF Analog Driver/Transmitter DC OK - This illuminates Green when the DC outputs that connect to the modules in the transmitter are present. Chapter 3, Site Considerations, Installation and Setup Procedures DC OK - This illuminates Green when the DC inputs to the PA module are present. POWER AMPLIFIER OR DRIVER MODULE LEDs ON FRONT PANEL TEMP - This illuminates Green when the temperature of the heatsink in the PA is below 78°C. NOTE: Both the PA Module and Driver Module have the same front panel LEDs.