UBS Axcera CU250ATD Users Manual

Preliminary Instruction Manual

CU250ATD

Innovator

250-Watt Transmitter

AXCERA, LLC

103 FREEDOM DRIVE, P.O. Box 525 LAWRENCE, PA 15055-0525 USA

[phone] • FAX [phone]

www.axcera.com • [e-mail]

Innovator CU250ATD, 250 Watt Transmitter Table of Contents

CU250ATD INNOVATOR 250-WATT TRANSMITTER

Introduction ..................................................................................................1

Manual Overview.....................................................................................1

Assembly Designators..............................................................................1

Safety ....................................................................................................1

Contact Information.................................................................................2

Return Material Procedure ........................................................................2

Warranty Information...............................................................................3

30W Driver Tray Description .........................................................................10

8 VSB Demodulator Board ......................................................................10

8 VSB Modulator Board ..........................................................................10

Amplifier Assembly ................................................................................11

2 Stage UHF Amplifier Board, ...........................................................12

RF Module Pallet w/Philips Transistors ...............................................12

Output Detector Board ...........................................................................12

30W Driver Tray Power Supplies .............................................................13

30W Driver Tray LCD Display and Front Panel LED Indicators ...........................13

30W Driver Tray Input and Output Connections...............................................14

30W Driver Tray Remote Connections ............................................................14

Front Panel Screens for the Transmitter..........................................................16

250W Power Amplifier Tray Description ..........................................................19

2-W ay Splitter ......................................................................................19

600W PEP RF Pallet................................................................................19

2-Way Combiner ...................................................................................19

Amplifier Control Board ..........................................................................19

+12VDC Switching Power Supply ............................................................19

+30VDC Switching Power Supply ............................................................19

250W Power Amplifier Input and Output Connections.......................................20

System Alignment...................................................................................................21

Set Up of the Output Power of the Transmitter..........................................21

ALC Board Set-Up in the Transmitter .......................................................21

Linearity Correction Adjustment ..............................................................22

Frequency Response Delay Equalization Adjustment..................................22

Appendix A

Drawings List..............................................................................................A-1

Transmitter Specifications............................................................................B-1

Instruction Manual, Rev. 0 August 14, 2007

Innovator CU250ATD, 250 Watt Transmitter Introduction

Manual Overview
This manual describes the transmitter, along with the setup and alignment procedures

for the transmitter.

Assembly Designators

Axcera has assigned assembly numbers, Ax designations such as A1, where x=1,2,3…etc,
to all assemblies, modules, and boards in the system. These designations are referenced
in the text of this manual and shown on the block diagram and interconnect drawings
provided in the appendix.

The cables that connect between the boards within a tray or assembly and that connect
between the trays, racks and cabinets are labeled using Brady markers. Figure 1 is an
example of a Brady marked cable. There may be as few as two or as many as four
Markers on any one cable. These Brady markers are read starting furthest from the
connector. If there are four Brady Markers, this marker is the transmitter number such
as transmitter 1 or transmitter 2. The next or the furthest Brady Marker is the rack or
cabinet number on an interconnect cable or the board number within a tray. The next
number on an interconnect cable is the Tray location or number. The Brady marker
closest to the connector is the jack or connector number on an interconnect cable or the
jack or connector number on the board within a tray.

Figure 1: Brady Marker Identification

Drawing

Safety

The transmitter systems manufactured by Axcera are designed to be easy to use and
repair while providing protection from electrical and mechanical hazards. Please review
the following warnings and familiarize yourself with the operation and servicing procedures
before working on the transmitter system.

Read All safety Instructions – All of the safety instructions should be read and
understood before operating this equipment.

Retain Manuals – The manuals for the transmitter should be retained at the transmitter
site for future reference. Axcera provides two manuals for this purpose; one manual can
be left at the office while the other can be kept at the site.

Heed all Notes, Warnings, and Cautions – All of the notes, warnings, and cautions
listed in this safety section and throughout the manual must be followed.

Follow Operating Instructions – All of the operating and use instructions for the
transmitter should be followed.

Cleaning – Unplug or otherwise disconnect all power from the equipment before cleaning.
Do not use liquid or aerosol cleaners. Use a damp cloth for cleaning.

Instruction Manual, Rev. 0 1

Innovator CU250ATD, 250 Watt Transmitter Introduction

Ventilation – Openings in the cabinet and module front panels are provided for
ventilation. To ensure the reliable operation of the driver/transmitter, and to protect the
unit from overheating, these openings must not be blocked.

Servicing – Do not attempt to service this product yourself until becoming familiar with
the equipment. If in doubt, refer all servicing questions to qualified Axcera service
personnel.

Replacement Parts – When replacement parts are used, be sure that the parts have the
same functional and performance characteristics as the original part. Unauthorized
substitutions may result in fire, electric shock, or other hazards. Please contact the
Axcera Technical Service Department if you have any questions regarding service or
replacement parts.

Contact Information

The Axcera Field Service Department can be contacted by phone at [phone] or
by fax at [phone].

Before calling Axcera, please be prepared to supply the Axcera technician with answers to
the following questions. This will save time and help ensure the most direct resolution to
the problem.

1. What are the Customers’ Name and call letters?

2. What are the model number and type of transmitter?

3. Is the transmitter digital or analog?

4. How long has the transmitter been on the air? (Approximately when was the
transmitter installed.)

5. What are the symptoms being exhibited by the transmitter? Include the current
control/power supply LCD readings and the status of LEDs on the front panels of
the modules. If possible, include the control/power supply LCD readings before
the problem occurred.

Return Material Procedure

To insure the efficient handling of equipment or components that have been returned for
repair, Axcera requests that each returned item be accompanied by a Return Material
Authorization Number (RMA#). The RMA# can be obtained from any Axcera Field
Service Engineer by contacting the Axcera Field Service Department at [phone]
or by fax at [phone]. This procedure applies to all items sent to the Field
Service Department regardless of whether the item was originally manufactured by
Axcera.

When equipment is sent to the field on loan, an RMA# is included with the unit. The RMA#
is intended to be used when the unit is returned to Axcera. In addition, all shipping
material should be retained for the return of the unit to Axcera.

Replacement assemblies are also sent with an RMA# to allow for the proper routing of the
exchanged hardware. Failure to close out this type of RMA# will normally result in the
customer being invoiced for the value of the loaner item or the exchanged assembly.

Instruction Manual, Rev. 0 2

Innovator CU250ATD, 250 Watt Transmitter Introduction

When shipping an item to Axcera, please include the RMA# on the packing list and on the
shipping container. The packing slip should also include contact information and a brief
description of why the unit is being returned.
Please forward all RMA items to:

AXCERA, LLC
103 Freedom Drive
P.O. Box 525
Lawrence, PA 15055-0525 USA

For more information concerning this procedure, call the Axcera Field Service Department
at [phone].

Axcera can also be contacted through e-mail at [e-mail] and on the Web at

www.axcera.com.

Limited One Year Warranty for Axcera Products

Axcera warrants each new product that it has manufactured and sold against defects in
material and workmanship under normal use and service for a period of one (1) year
from the date of shipment from Axcera's plant, when operated in accordance with
Axcera's operating instructions. This warranty shall not apply to tubes, fuses, batteries,
bulbs or LEDs.

Warranties are valid only when and if (a) Axcera receives prompt written notice of
breach within the period of warranty, (b) the defective product is properly packed and
returned by the buyer (transportation and insurance prepaid), and (c) Axcera
determines, in its sole judgment, that the product is defective and not subject to any
misuse, neglect, improper installation, negligence, accident, or (unless authorized in
writing by Axcera) repair or alteration. Axcera's exclusive liability for any personal
and/or property damage (including direct, consequential, or incidental) caused by the
breach of any or all warranties, shall be limited to the following: (a) repairing or
replacing (in Axcera's sole discretion) any defective parts free of charge (F.O.B. Axcera’s
plant) and/or (b) crediting (in Axcera's sole discretion) all or a portion of the purchase
price to the buyer.

Equipment furnished by Axcera, but not bearing its trade name, shall bear no warranties
other than the special hours-of-use or other warranties extended by or enforceable
against the manufacturer at the time of delivery to the buyer.

NO WARRANTIES, WHETHER STATUTORY, EXPRESSED, OR IMPLIED, AND NO
WARRANTIES OF MERCHANTABILITY, FITNESS FOR ANY PARTICULAR
PURPOSE, OR FREEDOM FROM INFRINGEMENT, OR THE LIKE, OTHER THAN AS
SPECIFIED IN PATENT LIABILITY ARTICLES, AND IN THIS ARTICLE, SHALL
APPLY TO THE EQUIPMENT FURNISHED HEREUNDER.

Instruction Manual, Rev. 0 3

Innovator CU250ATD, 250 Watt Transmitter Introduction

F WARNING!!!
× HIGH VOLTAGE Ø

DO NOT ATTEMPT TO REPAIR OR TROUBLESHOOT THIS EQUIPMENT UNLESS
YOU ARE FAMILIAR WITH ITS OPERATION AND EXPERIENCED IN
SERVICING HIGH VOLTAGE EQUIPMENT. LETHAL VOLTAGES ARE PRESENT
WHEN POWER IS APPLIED TO THIS SYSTEM. IF POSSIBLE, TURN OFF
POWER BEFORE MAKING ADJUSTMENTS TO THE SYSTEM.

« RADIO FREQUENCY RADIATION HAZARD «

MICROWAVE, RF AMPLIFIERS AND TUBES GENERATE HAZARDOUS RF
RADIATION THAT CAN CAUSE SEVERE INJURY INCLUDING CATARACTS,
WHICH CAN RESULT IN BLINDNESS. SOME CARDIAC PACEMAKERS MAY BE
AFFECTED BY THE RF ENERGY EMITTED BY RF AND MICROWAVE
AMPLIFIERS. NEVER OPERATE THE TRANSMITTER SYSTEM WITHOUT A
PROPERLY MATCHED RF ENERGY ABSORBING LOAD ATTACHED. KEEP
PERSONNEL AWAY FROM OPEN WAVEGUIDES AND ANTENNAS. NEVER
LOOK INTO AN OPEN WAVEGUIDE OR ANTENNA. MONITOR ALL PARTS OF
THE RF SYSTEM FOR RADIATION LEAKAGE AT REGULAR INTERVALS.

Instruction Manual, Rev. 0 4

Innovator CU250ATD, 250 Watt Transmitter Introduction

EMERGENCY FIRST AID INSTRUCTIONS

Personnel engaged in the installation, operation, or maintenance of this equipment are
urged to become familiar with the following rules both in theory and practice. It is the
duty of all operating personnel to be prepared to give adequate Emergency First Aid and
thereby prevent avoidable loss of life.

RESCUE BREATHING

1. Find out if the person is
breathing.

You must find out if the
person has stopped
breathing. If you think he is
not breathing, place him flat
on his back. Put your ear
close to his mouth and look
at his chest. If he is breathing
you can feel the air on your
cheek. You can see his chest
move up and down. If you do
not feel the air or see the
chest move, he is not
breathing.

2. If he is not breathing, open
the airway by tilting his head
backwards.

Lift up his neck with one hand
and push down on his
forehead with the other. This
opens the airway. Sometimes
doing this will let the person
breathe again by himself.

BURNS

SKIN REDDENED: Apply ice cold water to
burned area to prevent burn from going
deeper into skin tissue. Cover area with a
clean sheet or cloth to keep away air. Consult
a physician.

SKIN BLISTERED OR FLESH CHARRED:
Apply ice cold water to burned area to
prevent burn from going deeper into skin
tissue.

3. If he is still not breathing,
begin rescue breathing.

-Keep his head tilted
backward. Pinch nose shut.

-Put your mouth tightly over
his mouth.

-Blow into his mouth once
every five seconds

-DO NOT STOP rescue
breathing until help arrives.

LOOSEN CLOTHING - KEEP
WARM

Do this when the victim is
breathing by himself or help
is available. Keep him as
quiet as possible and from
becoming chilled. Otherwise
treat him for shock.

Cover area with clean sheet or cloth to keep
away air. Treat victim for shock and take to
hospital.

EXTENSIVE BURN - SKIN BROKEN: Cover
area with clean sheet or cloth to keep away
air. Treat victim for shock and take to
hospital.

Instruction Manual, Rev. 0 5

Innovator CU250ATD, 250 Watt Transmitter Introduction

dBm, dBw, dBmV, dBµV, & VOLTAGE

EXPRESSED IN WATTS

50 Ohm System

WATTS PREFIX dBm dBw dBmV dBµV VOLTAGE
1,000,000,000,000 1 TERAWATT +150 +120
100,000,000,000 100 GIGAWATTS +140 +110
10,000,000,000 10 GIGAWATTS +130 +100
1,000,000,000 1 GIGAWATT +120 + 99
100,000,000 100 MEGAWATTS +110 + 80
10,000,000 10 MEGAWATTS +100 + 70
1,000,000 1 MEGAWATT + 90 + 60
100,000 100 KILOWATTS + 80 + 50
10,000 10 KILOWATTS + 70 + 40
1,000 1 KILOWATT + 60 + 30
100 1 HECTROWATT + 50 + 20
50 + 47 + 17
20 + 43 + 13
10 1 DECAWATT + 40 + 10
1 1 WATT + 30 0 + 77 +137 7.07V

0.1 1 DECIWATT + 20 - 10 + 67 +127 2.24V

0.01 1 CENTIWATT + 10 - 20 + 57 +117 0.707V

0.001 1 MILLIWATT 0 - 30 + 47 +107 224mV

0.0001 100 MICROWATTS - 10 - 40

0.00001 10 MICROWATTS - 20 - 50

0.000001 1 MICROWATT - 30 - 60

0.0000001 100 NANOWATTS - 40 - 70

0.00000001 10 NANOWATTS - 50 - 80

0.000000001 1 NANOWATT - 60 - 90

0.0000000001 100 PICOWATTS - 70 -100

0.00000000001 10 PICOWATTS - 80 -110

0.000000000001 1 PICOWATT - 90 -120

TEMPERATURE CONVERSION

°F = 32 + [(9/5) °C]

°C = [(5/9) (°F - 32)]

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Innovator CU250ATD, 250 Watt Transmitter Introduction

USEFUL CONVERSION FACTORS

TO CONVERT FROM TO MULTIPLY BY

mile (US statute) kilometer (km) 1.609347
inch (in) millimeter (mm) 25.4
inch (in) centimeter (cm) 2.54
inch (in) meter (m) 0.0254
foot (ft) meter (m) 0.3048
yard (yd) meter (m) 0.9144
mile per hour (mph) kilometer per hour(km/hr) 1.60934
mile per hour (mph) meter per second (m/s) 0.44704
pound (lb) kilogram (kg) 0.4535924
gallon (gal) liter 3.7854118
U.S. liquid
(One U.S. gallon equals 0.8327 Canadian gallon)
fluid ounce (fl oz) milliliters (ml) 29.57353
British Thermal Unit watt (W) 0.2930711
per hour (Btu/hr)
horsepower (hp) watt (W) 746

NOMENCLATURE OF FREQUENCY BANDS

FREQUENCY RANGE DESIGNATION
3 to 30 kHz VLF - Very Low Frequency

30 to 300 kHz LF - Low Frequency
300 to 3000 kHz MF - Medium Frequency
3 to 30 MHz HF - High Frequency
30 to 300 MHz VHF - Very High Frequency
300 to 3000 MHz UHF - Ultrahigh Frequency
3 to 30 GHz SHF - Superhigh Frequency
30 to 300 GHz EHF - Extremely High Frequency

LETTER DESIGNATIONS FOR UPPER FREQUENCY BANDS

LETTER FREQ. BAND

L 1000 - 2000 MHz
S 2000 - 4000 MHz
C 4000 - 8000 MHz
X 8000 - 12000 MHz
Ku 12 - 18 GHz
K 18 - 27 GHz
Ka 27 - 40 GHz
V 40 - 75 GHz
W 75 - 110 GHz

Instruction Manual, Rev. 0 7