OMB EM 1000 HE DIG PLUS COMPACT User manual

TECHNICAL MANUAL
v1.2 November 2019
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OMB EUROPE OMB USA
Polígono Industrial Centrovía
Calle Paraguay, 6
50198 - La Muela
Zaragoza, ESPAÑA
3100 NW 72nd. Avenue Unit 112
MIAMI, Florida 33122 USA
Telf.: [phone]
[phone]
Fax: [phone]
Web: www.omb.com
E-mail: [e-mail]
Web: www.omb.com
E-mail: [e-mail]
Telf. : [phone]
Fax: [phone]

OMB ESPAÑA
Polígono Industrial Centrovía
Calle Paraguay, 6
50198 – La Muela
Zaragoza (ESPAÑA)
Ph: [phone]
Fax: [phone]
Web: www.omb.es
E-mail: [email protected]m

LIMITED WARRANTY
About Installation
1. – The mains voltage must be kept between ±10% of its nominal value, unless
otherwise specified. If there are variations exceeding this tolerance, it will be
necessary to install a voltage stabilizer system within the station. If transient
over voltages due to electric motors or other devices of this sort connected to
the distribution line were present, or if the distribution line is exposed to
atmospheric electrical discharges, it must be indispensable the installation of
isolation transformers and gaseous dischargers before connecting any
equipment within the station.
2. - All equipments must be connected to the station ground system in order to
avoid damage, both for equipments and for maintenance personnel. It is
necessary to connect a differential automatic switch (lifesaver) at the station.
3. - Some equipments do not include interlock protection for open doors, covers
or connectors. In that case, these equipments must be kept in key–locked
places with access only to conveniently qualified personnel that are previously
advised about not opening doors, covers or connectors without disconnecting
the station mains switch before performing this job.
4. - Transmission equipments will NEVER be operated with an output power
higher than its nominal values, or with signals or input information different than
those specified in its individual characteristics.
5. - Ambient temperature inside the equipments' room will accomplish the
technical specifications of the equipments installed at the station lodge. In
absence of such specifications, maximum allowable temperatures will be from -
5 to +45ºC for television equipments, and from 0 to +40ºC for FM broadcast
equipments.
6. - In case of operation at abnormally high or extremely high temperatures
(over 30-40ºC), it is mandatory to install a forced cooling system that will keep
temperature below its upper limit. In case of operation at abnormally or
extremely low temperatures, it will be mandatory to install a thermostatic
controlled heating system for the equipment's room.
7. - The equipment’s surroundings and room must be free of dust and dirt.
Ambient relative humidity will be kept below equipment's extreme specifications.
In case of absence of this specification, allowable maximum will be 90% of
relative humidity non-condensing. Average relative humidity will be kept under
70% non-condensing.
8. - Every transmission equipment that can radiate some quantity of RF power
must be connected to a load or antenna system according to their individual
specifications before being energized.
9. - Maximum allowable VSWR in antenna systems both for TV or FM Radio
Broadcast operation of a given transmitter will be 1.25:1, unless otherwise
specified.

10. - Periodically, monthly as a maximum, technical personnel must visit the
station in order to perform a general equipment maintenance unless otherwise
specified. This maintenance will include checking the output power, VSWR of
antenna systems, forced cooling or heating systems for the equipments and for
the station itself, including cleaning of air filters, measuring the transmission
frequency with eventual correction if necessary, and performing a general check
of fundamental parameters of the equipments. In the event of any important
change in some operation parameters that will require replacement or
readjustment of any unit, the customer MUST CONTACT FIRST WITH OMB
SISTEMAS ELECTRONICOS, S.A. BEFORE ANY ATTEMPT TO READJUST
OR REPLACE ANY COMPONENT OR UNIT INSIDE THE EQUIPMENTS IN
ORDER TO KEEP VALID THIS WARRANTY.
11. - For devices in fixed racks or cabinets, they must be effectively connected
according to the International Installations Standards to the station ground
system, which its total impedance measured to ground cannot be higher than 5
ohms. The equipments must be connected to the ground system so that they
can be kept out of the mains discharge between tower and ground.
About Transportation
1. - OMB Sistemas Electrónicos S.A. is not responsible of damages and/or
detriments derived from mishandling, steal, robbery, theft or vandalism during
the act of transportation of equipments to final or intermediate destination.
About Storage
1. - OMB Sistemas Electrónicos S.A. is not responsible of damages and/or
detriments derived from inappropriate storage of equipments, within inadequate
warehouses or outdoors, once equipments are delivered to transport agency.
About Projects
1. - OMB Sistemas Electrónicos S.A. is not responsible of inadequate use of
equipments made or registered by our Company, accomplishing propagation
projects that are not performed by our Specialists.
About Systems
1. - OMB Sistemas Electrónicos S.A. is not responsible for performance of
those equipments or systems that are not made, certified or registered by our
Company.
About Operation
1. - OMB Sistemas Electrónicos S.A. is not responsible of damages and/or
detriments derived from inadequate or negligent operation of equipments made,
certified or registered by our Company, once those equipments are operated by
personnel hired and/or employed by Customer.

General
This warranty covers and protects during a period of 24 months after the start of
operations, all equipments made, certified or registered by OMB Sistemas
Electrónicos S.A. including its components and units, against failures in
workmanship that may occur during operation of those equipments with the
exception of power valves or semiconductor devices that are covered by its
particular factory's warranty. In this case, OMB Sistemas Electrónicos S.A. only
can act as intermediary for negotiation with such Factory about accomplishment
of individual warranties.
For validation of this Warranty, it is indispensable that all Paragraphs be
respected by the Customer. Otherwise, this Warranty will be automatically
voided. This Warranty is self-activated with the reception by OMB Sistemas
Electrónicos, S.A. of the "Warranty Activation Manual" returned to OMB by the
customer. If such Document is not received, this Warranty will be voided.
All repairing or adjustments covered by this warranty are free of workmanship &
materials costs and expenses, but postage and transportation expenses of
equipments and OMB technical personnel & specialists, if required, will be
carried out by the customer.
OMB Sistemas Electrónicos S.A.

FM TRANSMITTER
TR EM 1000 HE DIG PLUS COMPACT
Technical Manual 1v2 November 2019 1
LIST OF CONTENTS
SECTION 0. GENERAL RECOMMENDATIONS 2
Gives information on safety procedures and good practices to use the equipment.
SECTION 1. INTRODUCTION 10
Introduction to the manual, technical specifications and description of the equipment’s features.
SECTION 2. OPERATION 20
Contains a deep description of the system operation.
SECTION 3. INTERNAL MODULES 61
Contains the schematics of the different modules included in the equipment.

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Technical Manual 1v2 November 2019 2
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Technical Manual 1v2 November 2019 3
GENERAL SAFETY RECOMMENDATIONS
When connecting the equipment to the Mains power, please follow these important
recommendations:
xThis product is intended to operate from a power source that will not apply more than
10% of the voltage specified on the rear panel between the supply conductors or
between either supply conductor and ground. A protective-ground connection by
means of the grounding conductor in the power cord is essential for a safe operation.
xThis equipment is also grounded through the grounding conductor of the power cord.
To avoid electrical shock, plug the power cord into a properly wired socket before
connecting to the product input or output terminals.
xUpon loss of the protective-ground connection, all accessible conductive parts
(including parts that may appear to be insulated) can render an electric shock.
Equipment must be connected to station's ground system before any attempt to
connect it to Mains electrical supply.
xTo avoid fire hazard, use only fuses of the type, voltage rating, and current rating
specified in this manual. For fuse replacement, always refer to User’s Manual.
xTo avoid explosion, do not operate this equipment in an explosive atmosphere.
xTo avoid personal injury, do not remove the product covers or panels. Do not operate
the product without the covers and panels properly installed.

FM TRANSMITTER
TR EM 1000 HE DIG PLUS COMPACT
Technical Manual 1v2 November 2019 4
GOOD PRACTICES
During the maintenance of the equipment covered in this Manual, please keep in mind the
following standard good practices:
xWhen connecting any instrument (wattmeter, spectrum analyzer, etc.) to a high
frequency output, use the appropriate attenuator or dummy load to protect the final
amplifiers and the instrument input.
xWhen inserting or removing printed circuit boards (PCBs), cable connectors, or fuses,
always turn off power from the affected part of the equipment. After power is
removed, allow sufficient time for the capacitors to bleed down before reinserting
PCBs. Always use discharge stick when available.
xWhen troubleshooting, remember that FETs and other metal-oxide-semiconductor
(MOS) devices may appear defective because of leakage between traces or component
leads on the printed circuit board. Clean the printed circuit board and recheck the
MOS device before assuming it is defective.
xWhen replacing MOS devices, follow standard practices to avoid damage caused by
static charges and soldering.
xWhen removing components from PCBs (particularly ICs), use care to avoid damaging
PCB traces.

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Technical Manual 1v2 November 2019 5
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RESCUE BREATHING AND CPR
WARNING:
Improper CPR or CPR performed on a person whose heart is still beating can cause serious
injury. Never perform CPR unless:
1. The person has stopped breathing.
2. The person does not have signs of circulation, such as normal breathing, coughing,
or movement in response to rescue breathing.
3. No one with more training in CPR is present.
CPR for infant or child through 8 years is not explained in this text.
Step 1: CHECK FOR CONSCIOUSNESS.
If you suspect a neck or spinal injury, do not shake the person. If the
person does not respond:
Call 911 or other emergency services immediately (have someone
else make the call if possible). Then proceed to Step 2.
Step 2: CHECK FOR BREATHING.
xLook, listen, and feel for breathing for 5 seconds. Kneel next to the person with your
head close to his or her head.
xLook to see if the person's chest rises and falls.
xListen for breathing sounds, wheezing, gurgling, or snoring.
xPut your cheek near the person's mouth and nose to feel whether air is moving out.
xIf the person is not breathing (or if you can't tell), roll the person onto his or her back.
If he or she may have a spinal injury, gently roll the person's head, neck, and shoulders
together as a unit until the person is on his or her back.