You’ve already unpacked it, haven’t you? You’ve unpacked it and
plugged it in and turned it on and fiddled with the knobs. No?
Okay, good. Please take a few minutes to read the manual and
familiarize yourself with your new Technalogix power amplifier.
We believe that this manual, and of course our equipment, should
be everything you need to get on the air with superb broadcast
quality video. We understand that a capable and confident user
will get the most out of our product and we have made every
attempt to educate readers of all technical levels. If there is
something that is not clear, or you require further information,
please do not hesitate to contact us and we’ll be glad to help out.
Technalogix Ltd.
#4, 8021 Edgar Industrial Place
Red Deer, Alberta, Canada
T4P 3R3
Phone: 403.347.5400
Fax: 403.347.7444
URL: www.technalogix.ca
Email: technical@technalogix.ca
sales@technalogix.ca
We truly appreciate that you have chosen us as your television
broadcast system supplier. Happy viewing.
This section is written as a general guide to keep all 5 fingers on your hand and is intended for those having
previous knowledge and experience with these kinds of equipment. It is not intended to contain a complete
statement of all safety precautions, which should be observed by personnel using this or other electronic
equipment.
DOCUMENTATION - Read, retain and follow instructions before operating the equipment. There is a
lot of useful information in the manual, and besides, we spent a lot of time writing it!
ENVIRONMENT - To reduce the risk of fire or electric shock, do not expose this equipment to rain,
moisture, or rye and sodas at the company Christmas party. Refer all servicing to qualified service
personnel.
SERVICING - Do not attempt to service this equipment yourself as opening or removing covers can
result in a warm tingly feeling and will void the warranty. Refer all servicing to qualified service
personnel.
I-1
Safety and First Aid
Personnel engaged in the installation, operation, maintenance, or servicing of electronic equipment are exposed
to the hazard of high voltage. It is imperative that all safety regulations and precautions are consistently
observ ed. Knowledge of first aid procedures is recommended. The following information is presented as a
reference only.
• At all times, avoid placing any part of the body in series between ground and circuit points, whether power is
on or off.
• Dangerous voltage may be present in equipment even though power is off. Do not open the cabinet. Refer
servicing to qualified service personnel.
• It is the duty of all personnel to be prepared to give adequate emergency first aid treatment and thereby
prevent avoidable loss of life.
• There are three principle degrees of burns, recognizable as follows:
• a first-degree burn reddens the skin.
• a second-degree burn blisters the skin.
• a third degree burn chars the flesh and frequently places the victim in a state of shock accompanied
by respiratory paralysis.
• Respiratory paralysis can cause death by suffocation within seconds. It is imperative that the approved
methods of artificial respiration are initiated immediately and continue until the victim’s breathing is normal.
• A muscular spasm of unconsciousness may render the victim unable to break free of the electric power. If
this is the case, turn the power off immediately.
DO NOT TOUCH THE VICTIM OR YOU MAY SHARE THE SAME PREDICAMENT.
• If the power cannot be turned off immediately, very carefully loop a dry rope, article of clothing, length of
strong cloth or a rolled-up newspaper around the victim and pull the victim free of the power source.
Carefully avoid touching the victim or clothing.
• Once free of the power source, the victim must be placed in a reclining position and covered with a
blanket or newspapers to keep warm. At the first opportunity, enlist help in summoning a doctor. If a
doctor cannot be summoned, transport the victim to the doctor or a hospital. Be sure the victim is kept
well covered and warm while awaiting professional treatment.
I-2
Operating Safeguards
It is a known fact that our broadcast transmitters and translators enjoy 50-ohm load impedances. So much
so, that it is imperative you maintain 50-ohm impedances throughout your system. In return, your equipment
will provide you with maximum power transfer to the antenna and decreased reflected power heading back
towards the amplifier pallets, reducing the amount of magic smoke that gets let out of the power amplifier.
Before anything is turned on, ensure that there is a 50-ohm path from the output of each stage to the input
of the next, all the way to the antenna.
In addition to maintaining proper 50-ohm impedances throughout the signal chain, it is also important,
whenever possible, to make sure the RF drive going to the input of the power amplifier is removed before
turning on or turning off the DC power supply. This is because all of the RF transistors used in the individual
amplifier pallets are fabricated with LDMOS (Laterally Diffused Metal Oxide Semiconductor) technology.
Nice and linear yes, but they do not like to make any RF power when their supply voltages are not within a
specific range. When you first turn your power amplifier on or off, the DC power supply’s output voltage may
take a while to stable out to a safe operating voltage. Ten seconds wait before applying the RF drive will
ensure no issues arise.
Our power amplifiers are designed to reliably generate a specific RF output power. Failing to adhere to
overdriven amplifier warnings can decrease the reliability of your system, and frankly, makes our repair
department busy and grumpy. If you need to transmit to a little larger coverage, you are better off increasing
antenna gain, and more importantly, antenna height above average terrain. On TV and FM broadcast
frequencies, insufficient antenna height puts an upper limit on your range, regardless of power levels, as the
distance from your antenna to the radio horizon is limited.
I-3
Section II - Warranty
Our legalese is straightforward. It is simply designed to give you peace of mind and helps you resist the
temptation to have your electronics friend try to repair your Technalogix product.
Technalogix Ltd. products have been completely tested and found to meet specifications and be in
proper operating condition. They are warranted to be free from defects in materials and workmanship
for a period of one year from the date of shipment. If the system becomes damaged in shipment and
there are obvious signs of damage to the outside of the packaging, notify your courier immediately
before that courier walks out the door.
Technalogix Ltd. will not be liable for damages of whatever nature arising out of or in connection with
the equipment or its use thereof. Technalogix does not assume responsibility for injury or damage
resulting from the practices of untrained or unqualified personnel in the handling of this equipment.
Technalogix Ltd. warranty does not include:
• misuse, neglect or accident.
• incorrect wiring and /or improper installation.
• unauthorized repairs, modifications or use in violation of instructions issued by Technalogix.
• incidental or consequential damages as a result of any defect.
• reshipment cost or insurance of the unit or replacement units or parts.
• acts of nature or terrorism.
Technalogix agrees, at our option, to remedy warranted defects or furnish a new part in exchange for
any part of a unit which, under normal installation, use and service, becomes defective. The user will
pay for transportation costs to and from the repair center. If you require technical service on the site,
the cost to you will be $800.00 per day plus air fare and meals.
II-1
To claim your rights under this warranty:
•Contact Technalogix and describe the problem in as much detail as possible. See troubleshooting
section in this manual. If a solution cannot be found at this time, it may be determined that the unit
will have to be returned to Technalogix for repair, once a Return Materials Authorization (RMA)
number is provided. Please look under our web site (www.technalogix.ca) for the RMA form
(Service) and fill it out. Either fax it to us or email to us.
•Package equipment carefully for prepaid shipment to Technalogix. Include a written description of
the problem experienced, a copy of the original invoice establishing warranty status, and the RMA.
Technalogix reserves the right to make revisions in current production of the equipment and assumes
no obligation to incorporate these changes in earlier models.
Shipping Address:
Technalogix Ltd.
ATTN: RMA# #4, 8021 Edgar Industrial Place
Red Deer, Alberta, Canada
T4P 3R3
Ph: 403.347.5400
Made in Canada, returned for repairs
II-2
Section III - Overview
Standard Features
• No sync compression to ensure power amplifier is digital compatible
• Front panel Liquid Crystal Display (LCD) to monitor forward and reflected RF power, and DC
voltage
•Microcontroller-based monitoring and control ensures amplifier will never be overdriven and high
VSWR will not damage amplifier
• AC circuit breaker on back panel to eliminate replacement of fuses
• RF/EMI filtering on AC entry plug
• All aluminium enclosure maintains power amplifier’s light weight
• Simple design using commonly available parts ensures reliable operation
• Predominate and third-order intermodulation distortion exceeds Industry Canada and FCC
specification.
III-1
Principle of Operation
The TAUD-40 power amplifier supplies a 130-watt P1dB peak video signal with an aural carrier level
10 to 13 dB below visual carrier (dBc) on any of the UHF television channels 14 through 69. Please
note that channel selection must be made at time of order, as the transmitter or translator is calibrated
and tested to the channel requested and is not field tuneable. The TAUD-40 power amplifier is a
modular solid-state 100-watt broadcast amplifier utilizing readily available RF components wherever
possible, thus enhancing the serviceability of the equipment.
The TAUD-40 is comprised of a UHFTV-10 driver and a UHFTV-150 final amplifier. The unique zero
sync compression technology ensures digital ready operation.
The TAUD-40 features ultra linear amplification and individual channel RF output bandpass filtering.
The amplifier modules are stable for high reliability and long service life.
III-2
Block Diagram
The RF signal enters through the RF Input connector on the power amplifier enclosure from the
modulator or processor. It then passes through an RF attenuator to limit the output power level of
the power amplifier and to help buffer any transients that may come into the power amplifier. After
attenuation, the signal is amplified through the UHFTV-10 driver and UHFTV-150 final pallet before
the signal passes through an isolator (circulator with load) and a bandpass filter. Finally, the
amplified signal passes through a dual directional coupler for monitoring purposes. After the
directional coupler, the signal exits the power amplifier enclosure before heading out to an antenna
for broadcast.
III-3
A=-0.4dB to -0.6dB
TO WATTMETER
AND ANTENNA
A=-0.05dB typ.
A=-0.4dB typ.
Attenuator
Adjustable A=+38dB min
to +49 dB max
UHFTV-150
V
CIRCULATOR
RF OUT
UHFTV-10
RF INPUT
V
V
COUPLER
DIRECTIONAL
Bandpass Filter
TERMINATION
50-OHM
TAUD-40 Block Diagram
Date: June 27, 2005 Page: 1 of 1
Rev ID
TAUD Series
Transmission Performance 1
Adjustable
Gain
TAUD-10 38 dB 35 W 35 W 13 W min 7 W min 6 W min 6 W min
TAUD-20 38-49 dB 70 W 65 W 23 W min 13 W min 12 W min 12 W min
TAUD-40 38-49 dB 130 W 125 W 45 W min 26 W min 23 W min 23 W min
TAUD-80 50-61 dB 300 W 250 W 89 W min 53 W min 47 W min 45 W min
* The data modulation power levels take into account worst case trajectory overshoot and peak to average ratio.
Actual power output level may be higher.
VSWR protected RF output into open (internal isolator installed)
Input Return Loss min -16dB
Output Return Loss min -18dB
Spurious Emissions >60dBc
Harmonic Suppression >60dBc
Intermodulation Products >53dBc (red field, aural carrier inserted, no pre-correction)
P1dB
Minimum
Electrical Characteristics
Simple RF Connectivity BNC for RF Input and test point, N for RF output
Universal AC Input 88-264Vac, 47-63 Hz
EMI Filtered max AC Power TAUD-10 3.6Aac at 115Vac, 1.8Aac at 230Vac at 25W ps
TAUD-20 4Aac at 115Vac, 2Aac at 230Vac at 50W ps
TAUD-40 7Aac at 115Vac, 3.5Aac at 230Vac (TAUD-40) at 100W ps
TAUD-80 6Aac at 230Vac at 250W ps
TAUD Series Issue 1.02 September 29, 2005
digital power amplifiers
•Liquid Crystal Display Front
panel monitoring
• Internal Bandpass filter
• Remote monitoring 25-pin
interface Connection
•Internal RF isolator
protection
• 2-Stage amplification
• Class A Driver, Class A/B
Final
•Made in North America
Peak Sync
Output
Output *
QPSK
16-QAM
Output *
64-QAM
Output *
Page 1 of 2
256-QAM
Output *
TAUD Series
5W
RF INPUT
RF OUT
PUT RF
50W
BANDPASS
RF
digital power amplifiers
Physical Characteristics
Lightweight Enclosure 40 lbs (TAUD-10, TAUD-20), 45 lbs (TAUD-40), 50 lbs (TAUD-80)
Minimal rack space 3U (TAUD-10, TAUD-20, TAUD-40), 5U (TAUD-80)
Operating temperature 0 to +45°C
Humidity 90% non-condensing
Built in components UHF bandpass filter and RF isolator included
1
Due to continuous product improvements, Technalogix reserves the right to change specifications without notice.
Internal View
Typical Block Diagram
CONDITIONING
TAUD Series Issue 1.02 September 29, 2005
DRIVER
FINAL
ISOLATOR
FILTER
Page 2 of 2
Section IV – RF Components
Amplifier Pallets
The UHFTV -10 pallet is a two stage ultra linear class-A linear pallet. It has an adjustable gain of 26dB
to 37dBand draws no more than 5.o Adc total drain current (the exact bias and drain currents of your
system are found in the spec sheet supplied with each manual). The quiescent and drain currents can
be measured on the UHFTV-10 pallet by measuring the voltage drop across the current sense resistor
found directly at the DC pow er supply lead input to the pallet. This resistance is 0.01-ohms, providing a
10mV per ampere ratio.
The UHFTV -150 pallet used in the driver and final amplification stages use LDMOS (Laterally Diffused
Metal Oxide Semiconductor) technology. LDMOS technology offers higher gain, efficiency and linearity
over standard MOSFET and Bipolar devices. LDMOS transistors have the added advantage of not
having BEO (Beryllium Oxide) in their construction. The UHFTV -150 amplifier pallets have a typical
gain of 13 dB and draw no more than 14Adc (again, the exact bias and drain currents of your system
are found in the spec sheet supplied with each manual). Currents for these pallets must be measured
with an ammeter in series with the power supply lead. Temperature compensated biasing helps ensure
steady operating levels over wide temperature ranges.
Each of the amplifier pallets is connectorized. All amplifier pallets must have the transistor drain
voltages reach at least 26Vdc before the RF drive is applied.
IV-1
Isolator
The power amplifier pallets are protected in part by the isolator located in the filter enclosure. It is
actually made up of a circulator and 50-ohm dump resistor. The circulators’ specifications include an
insertion loss of less than 0.2dB with an isolation rating better than 20dB. Any reflected power gets
dumped into the flanged power resistor. This way, there is instantaneous protection due to the isolator
setup and long term protection due to the software.
Filter
The passive bandpass filter rejects spurious and harmonic output products and passes the UHF
channel RF output. The cavity resonator uses aperture coupling. Typical insertion loss is 0.3 dB to 0.6
dB depending on channel frequency. Average roll off is –33 dBc at a point 4.5 MHz below the peak
visual carrier frequency and –30 dBc 9.0 MHz above the peak visual carrier frequency. The filter is DC
grounded on both the input and output for additional lightning protection.
Directional Coupler
The Technalogix dual directional couplers provide DC voltages proportional to forward and reflected
RF power monitoring. These analog voltages are converted for processing using analog-to-digital
converters and provide the control system with valuable data for monitoring purposes. The directional
couplers installed in the power amplifier and filter enclosures have peak detection circuits on the
forward RF power side of the coupler and average detection circuits on the reflected RF power side of
the coupler. This is to allow the end user to set power in a ma nner that is more independent of
modulation and closer to a true tip-of-sync meter. Hence the readings of the displays in the power
amplifier system are peak for forward and average for reflected. Output power should be set following
the operating procedure found elsewhere in this manual. The directional coupler has a typical
insertion loss of 0.5dB and its Type N connectors can handle 1,500 watts peak.
IV-4
Section V – Power Supply
Switching AC-DC power supplies are used to power the amplifier pallets, the control circuits, and all of
the fans. There is (1) power supply used to generate the necessary current for the amplifier pallets, set
to 31.0 Vdc nominally.
The power supply is a Lambda SWS600-36. This switching power supply is fully protected against
short circuit and output overload. Short circuit protection is a cycling type power limit. The internal AC
fuse is designed to blow only on a catastrophic failure in the unit – the fuse does not blow on overload
or short circuit. The thermal shutdown automatically recovers when the power supply chassis cools
down.
AC is fed into the enclosure via a filtered EMI AC entry. It is then current limited with a resettable circuit
breaker before passing through a rocker switch. This switch turns the AC on and off to the switching
power supply.
V-1
SWS300/600 Series
3055 Del Sol Blvd • San Diego, CA 92154 • 1-800-LAMBDA-4
Meets IEC61000-4 Greater reliability
Global safety Approvals Supports Global Use
Power Factor Corrected Supports Global Use
Level B EMI Assists System Compliance
FeatureBenefit
Factory AutomationProcess Control, NC-Machining,
Automotive, Packaging Equipment,
Materials Handling,
Chemical Processing, Robots
Test & MeasurementBurn-in & Test, Automated, Detection
MODELSWS300SWS600
ITEMS
Input Voltage range (1)-85 - 265VAC (47 - 63Hz) or 120 - 370VDC
Inrush Current (115 / 230VAC)A20 / 40
Power Factor-Meets EN61000-3-2
Input Current (100/200VAC)A3.6 / 1.8A7.2 / 3.6A
Temperature Coefficient-<0.02%/°C
Overcurrent Protection-->105%, Constant current style
Overvoltage ProtectionV3.3V: 4.1-5.3V, 5V: 6.25-7.25V, 12V: 13.8-16.8V
15V: 18.7-22.5V, 24V: 30-34.8V, 36V: 41.4-50.4V, 48V: 60-69.6V
Overtemperature Protection-Yes, cycle AC to reset
Hold Up Time (Typ)ms20ms at 115/230VAC
Leakage Current (max)mASWS300: 0.75mA , SWS600: 1.5mA
Remote Sense-NoneYes
Parallel Connection-NoneYes
Remote On/Off-NoneYes, >4.5V to shutdown
Power Fail Signal-NoneYes, open collector output
LED Indicator-Green LED = On
Operating Temperature--10 to +65°C (See table for derating - model specific)
Storage Temperature°C-30 to +85°C
Humidity (non-condensing)-30 - 90% RH operating, 10 - 95%RH non operating
Cooling-Internal fan
Withstand Voltage-I/P to Grnd 2kVAC, I/P to O/P 3kVAC, O/P to Grnd 500VAC, O/P to CNT 100VAC for 1 min
Isolation Resistance->100M at 25C & 70%RH, Output to Ground 500VDC
Vibration (non operating)-10 - 55Hz (sweep for 1 min)19.6m/s
2
constant X, Y, Z 1 hour each plane)
Immunity-EN61000-4-2, -3, -4, -5, -6, -8, -11
Safety Agency Approvals-UL60950, CSA60950, EN60950, EN50178, CE Mark, SEMI F47 (208VAC)
Conducted & Radiated EMI-EN55011 / EN55022-B, FCC Class B
Recommended EMI Filter-MC1206MC1210
Weight (Typ)g9502000
Size (WxHxD)in2.05 x 4.01 x 7.8"3.62 x 4.72 x 7.48"
WarrantyyrsTwo Years
Specifications
Notes:(1) Derate linearly to 85% load from 115VAC to 85VAC input (derate to 90% load for SWS600-3 & -5)
SWS300/600 Series
3055 Del Sol Blvd • San Diego, CA 92154 • 1-800-LAMBDA-4
Revision A4: Mar 2005
RWS15W & 30W Single Output, High Reliability
JWS, JWS-P & JWT50-600W Single & Triple Output, High Reliability
SWS50-150W Single Output
ZWS5-240W PCB style Single Output
Other Lambda Industrial Products
SWS300100%91.6%83.3%50%
SWS600100%85%70%55%
Additional derating required when operating SWS600 with side
ventilation holes blocked - see installation manual.
The Insight control system is used for a variety of functions, the most important of which is ensuring
that the transmitter continues to operate in a safe manner. The control system also allows the user
to monitor and control the transmitter from both the front panel and the remote access port.
Five modules comprise the Insight control system. These modules work together to provide all the
functions of the control system. The modules are: the user interface module, the coupler condition
module, the RF conditioning module, the temperature sensor module, and the TxNET module. The
operation of each module is outlined in the following sections.
User Interface Module
The primary function of the user interface module is, as the name suggests, providing the user
interface for the control system. This circuit board is mounted to the front panel of the transmitter,
directly behind the LCD display. The membrane switch on the front panel is also connected to the
user interface module. These components together provide the user with the ability to monitor the
transmitter from the front panel.
The following parameters can be monitored from the front panel:
• Forward (incident) power at the transmitter output.
• Reflected (reverse) power at the transmitter output.
• DC voltage of the transmitter power supply.
• DC current for each pallet in the transmitter.
• Temperature of the heat sink of the transmitter.
• The time since the transmitter was last shut down.
The hardware of the user interface module is based around a microcontroller (U112). This
microcontroller interfaces directly with the LCD and the membrane switch to provide output and
receive input from the user. The microcontroller also communicates with the coupler conditioning
board over a controller area network (CAN) bus. This communication is facilitated be two ICs, U113
and U114, and passes through a CAT5 cable attached to connector J105. The communication link
with the coupler conditioning module allows the user interface module to receive information about
the foreword power, reflected power, and temperature of the transmitter, as well as relay
commands from the user to the rest of the system. If the transmitter includes more than on
amplifier module, a second CAN connection will be present between the user interface module
(J106) and the TxNET board to facilitate communication between enclosures.
Other elements of the user interface module are also controlled by the microcontroller. A buzzer
(BZ101), a status LED (D113), and a relay to control the backlight of the LCD (RL101), are all
controlled through a buffer (U116). In order for the user interface module to monitor the current
draw of each pallet in the system, the DC supply wires pass through the user interface module on
their way from the power supply to the pallets. The DC enters through connector J101 from the
power supply, and exits through J102 to go to the pallets. As the current passes through shunt
resistors (R117, R118, R120, R121, R123, R124, R126, R127, R129, R130), the voltage drop is
VI -1
monitored by U101 to U105, buffered by U106 to U108, and sent to the analog to digital converter
integrated into the microcontroller. There are five circuits for which the current is monitored by this
system.
As the DC supply passes through the user interface module, it undergoes filtering to ensure that
the supply to the pallets is as clean as possible. Each of the five circuits passes through a network
of transient voltage suppressors, capacitors, and inductors. Each connection is also fused at the
input to insure an over-current condition does not persist. The fuses are a replaceable mini blade
type fuse with a 42V voltage rating, and a current rating depending on application.
Coupler Conditioning Module
The coupler conditioning module serves to monitor the output of the directional coupler which
provides a voltage proportional to the foreword and reflected power at the output of the transmitter.
The coupler conditioning module also interfaces with each of the other boards in the control
system, acting as the hub of communications for the system. Lastly, the coupler conditioning board
sends and receives signals through the remote access port, via the TxNET board.
The analog signals produced by the coupler for forward and reflected power are passed onto the
coupler conditioning module by connectors J206 and J207 respectively. Each signal is filtered by
CLC networks, and buffered and amplified by the op-amp U214. The level of the forward signal
can be adjusted by VR201, and the reflected signal by VR202. These two potentiometers can be
used to fine tune the power readings of the transmitter if they go out of calibration. The analog
signals are converted to digital by an analog-to-digital converter integrated into the microcontroller
U202.
Aside from taking readings from the coupler, the microcontroller on the coupler conditioning
module also interfaces with the RF conditioning module (through J201A) and the temperature
sensor (through J201B). The microcontroller interfaces with the CAN bus using U203 and U204.
Through the CAN bus, the coupler conditioning board is able to communicate with the user
interface module, and any other amplifiers that are in the system. The CAN bus is connected
through J201C, and J201D if there are multiple amplifiers in the transmitter system.
The last task of the coupler conditioning board is to send and receive remote access signals to and
from the TxNET board. Two analog outputs, proportional to forward and reflected power and
produced by the digital-to-analog converter U212 after it receives input from the microcontroller.
The analog outputs are then buffered by U211 before being sent through J203 to the TxNET
board. J203, along with J204, also bring the digital inputs and outputs from the TxNET board to the
coupler conditioning module. The digital signals are then connected to the microcontroller through
the opto-isolators U205, U206, U207, U208, and U209.
VI -2
RF Conditioning Module
The RF conditioning board is located at the RF input of the amplifier. Its main function is to act as
a variable attenuator, so that the control system can add attenuation to the input of the amplifier in
order to limit the output power of the transmitter. The RF signal comes in to the RF conditioning
module through J302 before it passes through a manually variable attenuator made up of R305,
VR303, and R307. The signal then passes through the digitally-controlled variable attenuator
U302 before exiting through J303. The input for the digital attenuator comes from the coupler
conditioning module through J304. The input signals are passed through the opto-isolators U303,
U304, and U305 before being sent to the digital attenuator. In total, five control signals go to the
digital attenuator, allowing for attenuations of up to 31dB in 1dB steps.
Temperature Sensor Module
The temperature sensor module is a small board mounted to the main heatsink of the amplifier.
The main purpose of the temperature sensor module is to take temperature readings of the
heatsink. The temperature sensor IC is U1 which, after it has taken a reading, relays the digital
information to the coupler conditioning module through J1. Also passing through J1 is a driver
disable signal coming from the coupler conditioning module. The temperature sensor module
simply takes this signal and passes it through to J2, where it is connected to the driver pallet.
TxNET module
The TxNET module is simply a passive board that acts as an interface between the wiring on the
inside of the amplifier enclosure and connections on the outside of the enclosure. The DB-25
connector for the remote port (J602) is attached to the TxNET module. The signals travelling
through this port are connected to the coupler conditioning module through J601 and J603. The
TxNET module also includes up to four straight through RJ45 connections: J604 to J605, J606 to
J607, J608 to J609, and J610 to J611. These connections are only used on systems with multiple
enclosures, to pass control signals between enclosures.
VI -3
Remote Port
The remote port allows external control of the transmission system via the DB25. The functions of
each pin on the remote port are indicated in the following table:
Pin Number Description
1 Ground
2 Forward power sample1
3 Reflected power sample1
4 Carrier off2
5 Carrier on2
6 Increase carrier level (level must have been decreased) 2
7 Decrease carrier level (1dB increments) 2
8 Soft reset2
Notes: 1. Analog output with voltage ranging from 0 to 5Vdc.
2. TTL level digital input, active on rising edge.
3. TTL level digital output, active high.
VI -4
Fault Shutdowns
On the LCD (Liquid Crystal Display) the following messages may appear:
If you see this message, the system has been driven to a power level higher than it is rated for.
This message will likely only appear momentarily, before the amplifier will add attenuation at its
input to bring the output power to a safe level.
This message indicates that excessive reflected power has been detected at the output of the
transmitter. Periodically, the amplifier will cycle on, and re-check for reflected power. If high
reflected power continues, the transmitter will eventually shut down completely.
This message indicates that the transmitter is experiencing unsafe internal temperatures. Output
power is reduced until a safe temperature is reached.
VI -5
Monitor and Control System (Insight) Bills of Materials
Circuit: User Interface Module
Revision: 1.03
Designations Qty Description Package Manufacturer Mfg. Part Number
CAR on
CAR off
CAR up
+5 Vdc
CAR down
+3.3 Vdc
Soft RES
RESET
1J601
2
F601
3
4
F602
5
7
8
1J603
2
13
12
11
10
9
8
7
6
5
4
3
2
1
J602
25
24
23
22
21
20
19
18
17
16
15
14
3
4
F603
5
6
F604
7
8
IN 1
IN 2
IN 3
IN 4
IN 5
IN 6
IN 7
IN 8
IN 1
IN 2
IN 3
IN 4
IN 5
IN 6
IN 7
IN 8
IN 1
IN 2
IN 3
IN 4
IN 5
IN 6
IN 7
IN 8
1J604
2
3
4
5
6
7
8
1J606
2
3
4
5
6
7
8
1J608
2
3
4
5
6
7
8
1J605
2
3
4
5
6
7
8
1J607
2
3
4
5
6
7
8
1J609
2
3
4
5
6
7
8
OUT 1
OUT 2
OUT 3
OUT 4
OUT 5
OUT 6
OUT 7
OUT 8
OUT 1
OUT 2
OUT 3
OUT 4
OUT 5
OUT 6
OUT 7
OUT 8
OUT 1
OUT 2
OUT 3
OUT 4
OUT 5
OUT 6
OUT 7
OUT 8
IN 1
IN 2
IN 3
IN 4
IN 5
IN 6
IN 7
IN 8
1J610
2
3
4
5
6
7
8
1J611
2
3
4
5
6
7
8
OUT 1
OUT 2
OUT 3
OUT 4
OUT 5
OUT 6
OUT 7
OUT 8
TxNET
RevID
1.02
Date: Dec. 5, 2005 Page: 1 of 1
Section VII – Mechanical Section
The heat sink allows the amplifiers to operate at a cooler temperature and prevents overheating,
which helps the longevity of the entire system. The heat sink has hollow fins, which help dissipate
the heat from the amplifiers faster than a conventional serrated or corrugated fin.
In addition to the cooling effects of the heat sink, there is a fan that provides 110 cubic feet per
minute (CFM) of air flow (into zero static pressure).
VII-1
Section VIII - Installation
This section contains installation recommendations, unpacking, inspection, and installation instructions
for the power amplifier. We are sure that you are chomping at the bit to install your new system, so we
recommend that you read the following sections very carefully.
Building Recommendations
The quality of the building is of great importance if you are to expect long life and continued
performance from the power amplifier. The building must be clean, dry, temperature controlled and
secure. Don’t forget to allow space in the building for any additional racks to house test equipment, a
workbench area, line regulating transformers, ladders, equipment and parts storage, first aid kit,
emergency generator if used, as well as heating and cooling devices that may be unique to your
installation. A sloping roof will tend to develop leaks less rapidly. The building should be well roofed
with good material. The cooling load will be lowered with reflective or light colored roofing material.
Technalogix Ltd.
VIII-1
Heating and Cooling Requirements
The environment’s temperature will contribute greatly to the length of the power amplifier’s life.
Technalogix recommends that the building’s filtered air intake must have capacity for all air-flow in the
building plus an additional 20%. Keep the intake below the roofline to avoid intake of solar heated air.
Please ensure that the intake and exhaust areas are on the same side of the building to avoid
pressure differentials during windy conditions. Also, do not position intake near exhaust’s preheated
air. If air conditioning is required to cool the shelter, discuss the situation with a qualified HVAC
technician. Under average conditions, 12,000 BTUs will cool approximately 500 square feet to a
comfortable level.
Technalogix Ltd.
VIII-2
Electrical Service Recommendations
Technalogix recommends that a qualified, licensed local electrician be consulted for the required
electrical service. We suggest local electricians because:
• The personnel knows the local codes
• The personnel can be on site readily
• You are apt to get better overall support if you give what business you can to local suppliers
Technalogix recommends that proper AC line conditioning and surge suppression be provided on the
primary AC input to the power amplifier. All electrical service should be installed with your national
electrical code in your area, any applicable provincial or state codes, and good engineering practice.
Special consideration should be given to lightning protection of all systems in view of the vulnerability
of most transmitter or translator sites to lightning. Lightning arrestors are recommended in the service
entrance. Straight and short grounds are recommended. The electrical serviced must be well
grounded. Do not connect the unit to an open delta primary power supply, as voltage fluctuations could
harm the unit. Branch your circuits. Do not allow your lights, your workbench plugs, and your
transmitting or translating equipment to operate on one circuit breaker. Each transmitter or translator
should have its own circuit breaker, so a failure in one does not shut off the whole installation.
Technalogix Ltd.
VIII-3
Antenna and Tower Recommendations
Your preliminary engineering workgroup should establish your antenna and tower requirements, both
for receiving and transmitting antennas. Construction of sturdy, high quality antenna/tower systems will
pay off in terms of coverage of your service area, the overall quality and saleability of your radiated
signal, and reduced maintenance expenses. Technalogix provides complete turnkey antenna systems
if needed. If your site is serving as a translator, your receiving antenna should be in line of sight to the
originating station all year round. The foliage will change with season. Transmitting antennas can
enhance or seriously impair the transmitter/translator output.
The selection, routing, and length of coaxial cable are extremely important in the installation. If there is
a 3 dB line loss in the cable between your unit’s output and the transmitting antenna, a unit will only
deliver 50 watts to the antenna. Buy the best cable you can obtain, route it via the shortest way to the
antenna, and keep it straight. Do not form it into sharp bends on its way. Do not use any more cable
fittings for the installation than absolutely necessary. All cautions here apply equally to all coaxial
cables in the system - input and output.
Pay attention to radial ice accumulation when designing the transmission system. It is not uncommon
for at least an inch of ice to build up on the tower and antenna. This in turn significantly increases the
weight, cross section, and wind loading of the system.
Attaching the transmission line to the tower is crucial to maintain a safe and reliable operation. Nylon
wire ties and electrical tape will breakdown in the sunlight and ultimately fail, creating a potentially
dangerous situation. It is important to use proper clamps and hoisting grips and also ensure that the
transmission line is grounded to the tower in several locations. When high currents flow through the
tower in the event of lightening strikes, some of that current will through the outer conductors of the
transmission lines. Due to the resistance difference between the steel tower and copper transmission
line, a significant voltage can be developed, often resulting in arcing between the outer jacket and
outer conductor, thus pitting the conductor.
Preventative maintenance is crucial in ensuring that safety is maintained. Specifically, check that
transmission line grounds are tight and are not missing any hardware. Frequently inspect support
clamps or spring hangers. Consider investing in an ice break, if you haven’t already done so, as
shards of falling ice can damage the transmission line – and if it is going to happen, it will happen at an
important time. Check the tower light photocells and conduit.
The better-known tower manufacturers offer complete technical and safety documentation with their
towers. Be sure that you have this information as it regards wind loading, guying, etc. The bestdesigned antenna system will function poorly if shortcuts and compromises are used during installation.
Follow the manufacturer’s instructions exactly, along with any engineering data prepared for the site.
Be absolutely safe and certain about this aspect as human lives may be at stake.
Technalogix Ltd.
VIII-4
Shelter Security
The FCC requires that the transmitter or translator be secure from entry or control by unauthorized
persons, and that any hazardous voltages or other dangers (including most tower bases) be protected
by locks or fences as necessary to protect personnel and prevent unauthorized tampering or
operation. Security of the building further implies that it be secure from wildlife. Use sturdy construction
materials, including sheet metal if necessary. Holes around conduit, cable, and other similar entry
points should be stuffed with steel wool and caulked to prevent entry of wildlife. Other features of
security for your shelter may include its location with respect to the prevailing wind conditions. A
location leeward of some natural topographical feature will prevent wind damage and snowdrifts. Check
the soil runoff conditions that may slow or hasten wind or water erosion and other concerns that may
be unique to your location.
Technalogix Ltd.
VIII-5
Unpacking and Inspection
Check the outside of the container. Carefully open the container and remove the power amplifier.
Retain all packing material that can be reassembled in the event that the equipment must be returned
to the factory.
Exercise care in handling equipment during inspection to prevent damage due
to rough or careless handling.
Visually inspect the enclosure of the power amplifier for damage that may have occurred during
shipment. Check for evidence of water damage, bent or warped chassis, loose screws or nuts, or
extraneous packing material in connectors or fan failures. Inspect all connectors for bent connector
pins. If the equipment is damaged, a claim should be filed with the carrier once the extent of the
damage is assessed. Technalogix cannot stress too strongly the importance of immediate careful
inspection of the equipment and subsequent immediate filing of the necessary claims against the
carrier if necessary. If possible, inspect the equipment in the presence of the delivery person. If the
equipment is damaged, the carrier is your first area of recourse. If the equipment is damaged and must
be returned to the factory, phone for a return authorization. Claims for loss or damage may not be
withheld from any payment to Technalogix, nor may any payment due be withheld pending the outcome
thereof. Technalogix cannot guarantee the carrier’s performance.
Technalogix Ltd.
VIII-6
Location and Function of Controls and Connectors (TAUD-40 Power Amplifier)
The following illustration depicts the location of the connectors when installing the power amplifier
(TAUD-40).
Technalogix Ltd.
VIII-7
POWER - Tactile button to turn carriers on and off.
NAVIGATE - Tactile button to open menu and move cursor in menu. When the screen has
timed out, this button is also used to refresh the screen
SELECT- Tactile button to select item in menu or to refresh screen after it has been
timed out
RESET - Tactile button to reset microcontroller in control board. Also clears existing
faults. Individual control board with reset comes back on with soft start feature.
RF IN – RF input from modulator or processor. BNC connector, 50 ohm.
RF OUT – 500-watt RF output. Connects to RF IN on filter enclosure. 7/16” din connector,
50 ohm.
AC IN – AC input to switching power supply.
AC BREAKER – Resettable circuit breaker is used to protect against inrush currents and
high current draw from switching power supply. The thermal circuit breaker
is a single pole configuration.
AC ON/OFF - AC rocker switch (SPST) to supply AC to the AC -DC switching power supply
REMOTE PORT - The transmitter can be controlled and monitored by the remote port. See
“Monitor and Control System” section for details.
Technalogix Ltd.
VIII-8
Initial Hook Up
1. Ensure that the antenna has been swept and has a return loss of greater than 20dB (VSWR =
1.2:1). This should be done before connecting the antenna cable to the transmitter output.
2. Check that your video source is present.
3. Place the transmitter/translator in its permanent location near a receptacle supplying required
AC voltage.
DO NOT APPLY AC POWER AND TURN ON POWER TO THE TRANSMITTER /
TRANSLATOR AT THIS TIME SINCE THE RF OUTPUT MUST BE PROPERLY
LOADED BEFORE OPERATION.
4. Place an appropriate AC power line protector, conditioner, and/or surge suppressor across the
AC supply line.
5. Hook up the modulator or processor as shown in their respective manuals for a transmitter or
translator. Do not connect the modulated signal from the RF OUT on the modulator or
processor to RF IN on the power amplifier at this time. Because of the characteristics of
LDMOS devices, the RF drive should not be connected to the power amplifier until after the
power supply and bias voltages are present and stable.
6. Ensure that modulator or processor RF output level is turned down as far as possible.
7. Ensure that the audio modulation is set to 100% with the audio signal supplied, as described in
the appropriate modulator/processor manual (will be factory set).
8. Ensure that the video modulation level is set to 87.5% with the video signal supplied, as
described in the appropriate modulator/processor manual (will be factory set).
9. Connect the transmitting antenna cable to the RF OUT N-type connector on the power
amplifier enclosure RF output.
Technalogix Ltd.
VIII-9
Section IX - Operating Procedure
Assuming the previous installation instructions have been completed and cautions noted, and the
TAUD-40 power amplifier is ready to receive a properly modulated video and audio signal, proceed
with the following steps to place the system in operation. The TAUD-40 power amplifier has been
factory aligned for channel frequency (per system specification), signal levels and optimum
performance.
IT IS HIGHLY RECOMMENDED THAT YOU RUN YOUR SYSTEM INTO A DUMMY LOAD BEFORE
INSTALLING TO MAKE SURE THERE ARE NO DAMAGES CAUSED IN SHIPPING AND THE UNIT IS
RUNNING PROPERLY
1. Do not apply RF drive signal to the power amplifier at this time.
2. Verify that all control and RF cables are tight and properly seated in or on the mating connector.
3. Plug the modulator or processor into AC mains.
4. Plug the 3U power amplifier enclosure into AC mains.
5. Switch AC rocker switch to “ON” position.
6. Verify that the power amplifier enclosure’s fan is on.
7. Ensure that the modulator/processor is turned on and set up according to its instructions. Depress
the POWER tactile button to turn the unit on.
8. The internal soft start circuitry will turn the bias voltages off until the power supply to the amplifier
pallets is fully stable. The message on the LCD indicates when the soft start is running. Once
complete, the Forward and Reflected Power and Power Supply readings will appear on the LCD in
the filter and power amplifier enclosures.
9. After the soft start is complete, apply the RF drive signal (which still should be turned down)
between the modulator or processor and the power amplifier RF In. This ensures that the RF drive
signal is applied only after the power supply is stable and the bias voltages are applied to the
amplifier.
IX-1
10. The TAUD-40 LCD shows the user the present status of the amplifiers. Adjust RF output power to
desired level (see Important RF Power Notice in previous section). Verify that the FWD Power
reads 100% or less - depending on signal content. The output power level can be adjusted using
the modulator or processor’s RF output level adjust. Keep in mind that the system will shut down
should the forward RF output power level be exceeded.
11. Ideally, the RFL Power should read zero. However, should a high VSWR be detected, the system
will automatically shut down and cycle as previously described. This is also shown as a percentage
of rated forward power.
12. Verify that the power supply reads approximately 30 Volts DC (see supplied final inspection sheet
for factory settings of power supply levels) on the LCD of the power amplifier.
13. Look at the transmitted output using a suitable monitor. If the signal quality is unsatisfactory, check
the input signals, connections to the antenna system, antenna and transmission line VSWR, and
the physical condition of the antenna.
If reception problems are encountered, and the quality of transmission is satisfactory, the difficulty is
often with the receiving antenna or with obstructions in the path between the transmitter/translator and
receiver.
IX-2
Section X – Maintenance and Troubleshooting
Periodic Maintenance
If your unit employs a filter on the air inlet for the fans, the filter should be cleaned every 30 days. If the
equipment is operated in a severe dust environment, the filters on the inlet fan may need to be cleaned
more regularly. Turn the system off and unplug all of the AC inlet cords. The filter can be lifted off the
fan and cleaned using an air compressor at low pressure. While the filter is out, clean the fan blades
themselves with a small brush. The fans themselves do not need lubrication.
The interior of the cabinets should be cleaned and inspected annually. Turn the system off and unplug all of the AC inlet cords. Remove the top lid by unscrewing the 6-32 machine screws.
Use extreme caution when working near the AC input terminal. The power
amplifier and power supply store hazardous capacitances and voltages.
Using either compressed air or a brush with soft bristles, loosen accumulated dust and dirt and then
vacuum the interior of the cabinet. Complete a visual inspection of the interior, making sure there are
no loose connections or discolorations on any components from heat. Nothing inside the power
amplifier enclosure exceeds a temperature that is not comfortable to the touch under normal operating
conditions, so any signs of discoloration indicate potential damage.
All modular components inside the enclosure are attached to aluminium mounting plates for easy
removal and replacement. Ensure that plates are secured and the mounting hardware is tight.
X -1
Troubleshooting
The first and most important aspect of troubleshooting anything is to be systematic. Note where you
have looked and what you found.
Look first for the obvious.
• Make a physical inspection of the entire facility. Are all necessary connections properly made? Do
you see any signs of obvious damage within the equipment?
• Is the AC power ‘ON’ to the site and the equipment? (Check fuses and circuit breakers if
necessary.)
• Are all the switches in the correct operating position?
• Is the input signal present?
• Check LCD readings for presence of forward and reflected power and 30 V DC supply levels.
The above is an aid in determining the fault if some aspect of the system is not operating. The
following table deals with quality of operation:
Symptom Possible Fault Correction
Horizontal bars in picture (may
roll either way depending on
phase)
Ensure modulator/processor
Diagonal lines in picture Interference Install EMI/RFI filter in AC line
Determine source and
AC grounding / AC interference Install EMI/RFI filter in AC line
and power amplifier share a
common ground
frequency of interfering signal
(spectrum analyzer may be
required)
X -2
Symptom Possible Fault Correction
Weak output or picture Low level input signal Verify presence and level of
input signal
Low output power Verify power amplifier output
with wattmeter and dummy load
Incorrect modulation depth Adjust to meet specification
High reflected power Incorrect load Ensure amplifier connected to
transmission line
Ensure correct antenna
impedance (50 ohms)
Check antenna tuning and
VSWR. Verify correct cable for
transmission line length
Check all cables for visible
damage (kinks, nicks or cuts)
Check all connectors for poor
connections, water or corrosion
Check alignment of antenna
Check for physical damage of
antenna, including ice build-up
X -3
Thank you
for choosing
Technalogix Ltd.
Loading...
+ hidden pages
You need points to download manuals.
1 point = 1 manual.
You can buy points or you can get point for every manual you upload.