R.V.R. Elettronica TEX150-LCD/S User manual

TEX150-LCD/S
User Manual
Volume 1
manufactured by Italy

TEX150-LCD/S - User Manual
Version 1.0
© Copyright 2004
R.V.R. Elettronica SpA
Via del Fonditore 2/2c - 40138 - Bologna (Italia)
Telefono: [phone]
Fax: [phone]
Email: [e-mail]
Web: www.rvr.it
All rights reserved
Printed and bound in Italy. No part of this manual may be reproduced,
memorized or transmitted in any form or by any means, electronic or
mechanic, including photocopying, recording or by any information
storage and retrieval system, without written permission of the copyright
owner.
File name: TEX150-LCD.P65
Version: 1.0
Date: 29/11/2004
Revision History
Date Version Reason Editor
29/11/04 1.0 First Version J. Berti
Notification of intended purpose and limitations of product use
This product is a FM transmitter intended for FM audio broadcasting. It utilises
operating frequencies not harmonised in the intended countries of use.
The user must obtain a license before using the product in intended country of
use. Ensure respective country licensing requirements are complied with.
Limitations of use can apply in respect of operating freuency transmitter power
and/or channel spacing.
Declaration of Conformity
Hereby R.V.R. Elettronica SpA declares that this FM transmitter is in
compliance with the essential requirements and other relevant provisions of
Directive 1999/5/EC.

TEX150-LCD/S
iUser Manual Rev. 1.0 - 29/11/04
Table of Contents
1. Preliminary Instructions 1
2. Warranty 1
3. First Aid 2
3.1 Treatment of electrical shocks 2
3.2 Treatment of electrical Burns 3
4. Removing the Packing 4
4.1 Package 4
4.2 General description 4
5. Quick Installation and Use Guide 6
5.1 Preparation 6
5.2 Use 7
5.3 Settings and calibration 7
5.4 Software 8
6 External Description 14
6.1 Front Panel 14
6.2 Back Panel 15
6.3 Connectors description 17
7. Technical Specifications 19
7.1 Mechanical characteristics 19
7.2 Electrical characteristics 19
8. Basic Functions 22
8.1 Power supply unit 22
8.2 Panel board 22
8.3 Main board 22
8.4 Power amplifier 23
8.5 Telemetry board 24
8.6 Control board 24

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1. Preliminary Instructions
This manual is written as a general guide for those having previous knowledge and experience with this kind of
equipment, well conscious of the risks connected with the operation of electrical equipment.
It is not intended to contain a complete statement of all safety rules which should be observed by personnel in using this
or other electronic equipment.
The installation, use and maintenance of this piece of equipment involve risks both for the personnel performing them and
for the device itself, that shall be used only by trained personnel.
R.V.R. Elettronica SpA doesn’t assume responsibility for injury or damage resulting from improper procedures or
practices by untrained/unqualified personnel in the handling of this unit.
Please observe all local codes and fire protection standards in the operations of this unit.
WARNING: always disconnect power before opening covers or removing any part of this unit. Use appropriate grounding
procedures to short out capacitors and high voltage points before servicing.
WARNING: this device can irradiate radio frequency waves, and if it’s not installed following the instructions contained
in the manual and local regulations it could generate interferences in radio communications. This is a "CLASS A"
equipment. In a residential place this equipment can cause hash. In this case can be requested to user to take the
necessary measures.
R.V.R. Elettronica SpA reserves the right to modify the design and/or the technical specifications of the product and this
manual without notice.
2. Warranty
Any product of R.V.R. Elettronica is covered by a 24 (twenty-four) month warranty.
For components like tubes for power amplifiers, the original manufacturer’s warranty applies.
R.V.R. Elettronica SpA extends to the original end-user purchaser all manufacturers warranties which are transferrable
and all claims are to be made directly to R.V.R. per indicated procedures.
Warranty shall not include:
1 Damage while the equipment is being shipped to R.V.R. for repairs;
2 Any unauthorized repair/modification;
3 Incidental/consequential damages as a result of any defect
4 Nominal non-incidental defects
5 Re-shipment costs or insurance of the unit or replacement units/parts
Any damage to the goods must be reported to the carrier in writing on the shipment receipt.
Any discrepancy or damage discovered subsequent to delivery, shall be reported to R.V.R. Elettronica within 5(five)
days from delivery date.
To claim your rights under this warranty, you shold follow this procedure
1 Contact the dealer or distributor where you purchased the unit. Describe the problem and, so that a possible easy
solution can be detected.
Dealers and Distributors are supplied with all the information about problems that may occur and usually they can
repair the unit quicker than what the manufacturer could do. Very often installing errors are discovered by dealers.

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2 If your dealer cannot help you, contact R.V.R. Elettronica and explain the problem. If it is decided to return the unit to
the factory, R.V.R. Elettronica will mail you a regular authorization with all the necessary instructions to send back
the goods.
3 When you receive the authorization, you can return the unit. Pack it carefully for the shipment, preferably using
the original packing and seal the package perfectly. The customer always assumes the risks of loss (i.e., R.V.R. is
never responsible for damage or loss), until the package reaches R.V.R. premises. For this reason, we suggest you
to insure the goods for the whole value. Shipment must be effected C.I.F. (PREPAID) to the address specified by
R.V.R.’s service manager on the authorization
DO NOT RETURN UNITS WITHOUT OUR AUTHORIZATION AS THEY WILL BE REFUSED
4 Be sure to enclose a written technical report where mention all the problems found and a copy of your original
invoice establishing the starting date of the warranty.
Replacement and warranty parts may be ordered from the following address. Be sure to include the equipment model
and serial number as well as part description and part number.
R.V.R. Elettronica SpA
Via del Fonditore, 2/2c
40138 BOLOGNA
ITALY
Tel. [phone]
3. First Aid
The personnel employed in the installation, use and maintenance of the device, shall be familiar with theory and practice
of first aid.
3.1 Treatment of electrical shocks
3.1.1 If the victim is not responsive
Follow the A-B-C's of basic life support
• Place victim flat on his backon a hard surface.
• Open airway: lift up neck, push forehead back (Figure 1).
• clear out mouth if necessary and observe for breathing
• if not breathing, begin artificial breathing (Figure 2): tilt head, pinch nostrils, make airtight seal, four quick full
breaths. Remember mouth to mouth resuscitation must be commenced as soon as possible
Figure 1 Figure 2
• Check carotid pulse (Figure 3); if pulse is absent, begin artificial circulation (Figure 4) depressing sternum (Figure
5)

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Figure 3 Figure 4 Figure 5
• In case of only one rescuer, 15 compressions alternated to two breaths.
• If there are two rescuers, the rythm shall be of one brath each 5 compressions.
• Do not interrupt the rythm of compressions when the second person is giving breath.
• Call for medical assistance as soon as possible.
3.1.2 If victim is responsive
•Keep them warm
• Keep them as quiet as possible
• Loosen their clothing (a reclining position is recommended)
• Call for medical help as soon as possible
3.2 Treatment of electrical Burns
3.2.1 Extensive burned and broken skin
•Cover area with clean sheet or cloth
• Do not break blisters, remove tissue, remove adhered particles of clothing, or apply any salve or ointment.
• Treat victim for shock as required.
• Arrange transportation to a hospital as quickly as possible.
• If arms or legs are affected keep them elevated
If medical help will not be available within an hour and the victim is conscious and not vomiting, give him a weak solution
of salt and soda: 1 level teaspoonful of salt and 1/2 level teaspoonful of baking soda to each quart of water (neither hot
or cold). Allow victim to sip slowly about 4 ounces (half a glass) over a period of 15 minutes. Discontinue fluid if vomiting
occurs.
DO NOT give alcohol
3.2.2 Less severe burns
•Apply cool (not ice cold) compresses using the cleansed available cloth article.
• Do not break blisters, remove tissue, remove adhered particles of clothing, or apply salve or ointment.
• Apply clean dry dressing if necessary.
• Treat victim for shock as required.
• Arrange transportation to a hospital as quickly as possible
• If arms or legs are affected keep them elevated.

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4. Removing the Packing
4.1 Package
The package contains the following:
•TEX150-LCD/S
•User’s Manual
•Connection cables to other equipment
•Power Mains Cables
The following accessories for the machine are also available at your R.V.R. dealer:
•/10MHz (10MHz external reference)
•Accessories and cables
4.2 General description
The TEX150-LCD/S, manufactured by R.V.R. Elettronica SpA, is a frequency
modulated audio radiodiffusion exciter able to transmit in the band ranging from
87.5 to 108 MHz in 10kHz steps, with output RF power adjustable up to a maximum
of 150 W on a 50Ohm standard load.
The TEX150-LCD/S includes a built-in stereo coder; a switch for Mono mode.
The exciter features a pass low filter that reduces harmonic emissions below the
limits permitted by international standards (CCIR or FCC), and can therefore be
used as a transmitter connected directly to the antenna.
The important audio characteristics of this device are low distortion and intermodulation
levels and a high noise signal ratio.
Substantial qualities of the TEX150-LCD/S are its compact size and its ease of
use. The machine features a modular design: the various functions are performed by
modules connected mostly with male and female connectors or with flat cables
terminating in connectors. This type of design makes maintenance operations and
module replacement easier.
The RF power section uses MOSFET modules able to deliver 150W.
The working frequency is guaranteed by a reference oscillator with compensated
temperature maintained by a PLL (Phase Locked Loop) system. The TEX150-LCD/
Sachieves frequency lock in a maximum time of thirty seconds from switch-on.
The TEX150-LCD/S is able to work on the entire frequency band without the need
for calibration or setting.

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The microprocessor control system includes an LCD on the front panel and a user
keyboard, and implements the following functions:
•Output power setting
•Working frequency setting
•Power delivery enabling and disabling
•Exciter work parameter measurement and display
•Communication with external devices
The status of the machine is indicated by four LEDs located on the front panel: ON,
LOCK, FOLDBACK, RF MUTE.
The exciter management software features a menu system. The user can scroll through
the menus using the four keys: ESC, LEFT/UP, RIGHT/DOWN, and ENTER.
The back panel includes the mains input connectors, the RF audio input and output
connectors, the telemetry connector, the protection fuse, two inputs for modulated
signals on subcarriers from specially provided external coders, usually used in Europe
for RDS (Radio Data System) transmission.
The exciter features an input for a 24 VDC external power supply. This auxiliary power
source, which can be created by the user with buffer batteries, is used automatically
if mains power is cut off.
NOTE: When using the 24 VDC external power supply the machine is not able to
deliver the maximum 150W output power.

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5. Quick Installation and Use Guide
This chapter contains the instructions necessary for installing and using the machine.
Should any part not be completely clear, for example when the machine is used for
the first time, we recommend you carefully read the complete description contained
in this manual.
5.1 Preparation
Unpack the exciter and before carrying out any other operation make sure no damage
has been caused during transport. In particular, make sure all connectors are in perfect
condition.
Check that the power supply voltage value matches the available mains voltage. The
protection fuses can be accessed externally through the back panel (see fig. 6.2). To
check its condition or if replacement is required, remove the fuseholder with a
screwdriver. Use the following type of fuse:
6.3 A5x20
Make sure the TEX150-LCD/S switches are in the “OFF” position. The exciter features
two switches: one built into the VDE base for the mains power supply cable, which
cuts off mains power completely, and the second is located on the front panel and
bypasses the machine’s switching power supply.
Connect the exciter RF output to the antenna cable or to a fictitious load able to
dissipate the power generated by the TEX150-LCD/S.
CAUTION: if no load is present, do not touch the output RF connector during machine
operation to avoid electric shock and electrocution.
Connect the mains cable to the MAINS connector located on the back panel (see fig.
6.2).
CAUTION: the power connector is a terminal board; make sure that the cable is not
live when making the connection.
CAUTION: the mains system must feature grounding to ensure both the safety of the
operators and correct operation of the device.
Connect the audio signals and RDS/SCA of their sources to the TEX150-LCD/S
input connectors following the instructions contained in the diagram in fig. 6.2.

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5.2 Use
To power the exciter, set the switch located on the front panel to “ON”.
Enter the “Set” menu and set the desired working frequency. For a description of the
various menus, see paragraph 5.4.
Use the switches and trimmers located on the back panel to set the characteristics
(impedance, pre-emphasis, stereo/mono) and the audio input and RDS (if used)
levels.
NOTE: Before delivery, the device is factory preset with output power adjustment at
minimum and to “OFF”. In any case, we recommend you check the set level before
delivering power, especially if the machine is used as a modulator for a power amplifier.
From the preset menu, set the desired power level.
From the “Fnc” menu, enable power delivery.
5.3 Settings and calibration
The only manual adjustments required for the TEX150-LCD/S are those related to
the levels and the audio operation mode.
The back panel of the device features a trimmer for each exciter input; the labels
indicate which trimmer refers to each input. The sensitivity of each input can be
adjusted with the trimmer within the range described in the following table:
Input sensitivity in Stereo mode:
Ingresso Figura 6.1 Trimmer Sensibilità Note
RDS [13] [14] -13 ÷ +13 dBu Livello in ingresso per deviazione
complessiva 75 kHz (0 dB)
SCA1 [29] [15] -8 ÷ +13 dBu
SCA2 [30] [31] -8 ÷ +13 dBu
Livello in ingresso per deviazione
complessiva 7,5 kHz (-20 dB)
Left [33] [32] -13 ÷ +13 dBu
Right [17] [16] -13 ÷ +13 dBu
Livello in ingresso per deviazione
complessiva 75 kHz (0 dB)

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To adjust the input sensitivity level, remember that the preset menu contains the
instantaneous modulation level and that an indicator reads a level of 75 kHz. For a
correct adjustment, we therefore recommend you apply to the machine input a level
equal to the maximum level of your audio program and adjust the related trimmer
until the instantaneous deviation coincides with 75 kHz.
To adjust the level of the subcarrier inputs, you can follow a similar procedure, with
the help of option “x10” selected from the “Fnc” menu. With this option, the indicated
modulation level is multiplied by 10, therefore the broken-line indication of the preset
menu coincides with the 7.5 kHz deviation value.
For the stereophonic version, there is a specific menu separately indicating the Left
and Right channel levels with related nominal level indicators for the maximum
deviation of 75 kHz.
•Preemphasis (switch [6] Fig. 6.2):
ON
1234
50 μs
ON
1234
75 μs
•L and R (XLR type) input impedance (switch [16] Fig. 6.2):
ON
12
Switch 1: impedenza ingresso R XLR ON = 600 Ω, OFF = 10 kΩ
Switch 2: impedenza ingresso L XLR ON = 600 Ω, OFF = 10 kΩ
•Modalità di funzionamento/impedenza ingresso MPX (switch [7] Figura 6.2):
ON
12
Switch 1: Modo di funzionamento ON = Mono, OFF = Stereo
Switch 2: impedenza ingresso MPX ON = 50 Ω, OFF = 10 kΩ
5.4 Software
The machine features a 2-line LCD which displays a series of menus. An overall
view of the machine menus is shown in fig. 5.1.
On the left-hand side of the display, depending on the case, there may be one or
more symbols:
The parameter indicated with the arrow can be modified.
The arrow indicates the current line, whose parameter cannot be modified. This
symbol is found in menus consisting of more than two lines as help with scrolling
the menu.
When the machine is switched on, the LCD displays the default screen, with a graphic
representation of the instantaneous modulation level and an indication of the direct
power value delivered:

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The bar to the right of “Mod” indicates the modulation progress in real time; the broken
bar indicates the maximum nominal modulation of 75 kHz (100%).
To vary the set power level, select the line pertaining to power with the DOWN key
and keep the ENTER key pressed until you have entered “modify” mode.
The screen that will appear in “modify” mode is similar to the one shown below:
The lower line shows the instantaneous power reading (in this example 97W), while
the bar indicates the set level. To increase the level, press the RIGHT/DOWN key, to
decrease it press LEFT/UP. As the set level increases or decreases, the bar will
become either longer or shorter to display the current setting. Once you have reached
the desired level, press ENTER to confirm and exit the preset menu.
Note that the set value is always saved. Therefore if you press ESC or if the timeout
time elapses without pressing any key, the power will remain on the last set value.
If you press ESC while you are in the preset menu, the following selection screen
will be displayed, from which you can access all the other menus:
To enter one of the submenus, select the name (which will be underlined by a flashing
cursor) with the LEFT or RIGHT keys and press ENTER.
If, on the other hand, you wish to return to the preset menu, simply press ESC again.
Fig. 5.1 shows the complete set of machine menus.

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5.4.1 Function menu (Fnc)
From this menu you can set the deviation display mode, enable or disable power
delivery by the exciter and set the power percentage of Power Good.
To set one of the items, select the related line with the UP and DOWN keys and then
press and keep pressed ENTER until the command has been accepted. In this way
the Pwr setting will change from On to Off or vice versa and the Mod setting will
change from “x1” to “x10” or vice versa. To change the Power Good percentage
value, after having selected PWG, simply change its value with the UP and DOWN
keys and confirm by pressing ENTER.
In “x10” mode the indication of the instantaneous deviation is multiplied by 10, therefore
the broken line on the preset menu will coincide with 7.5 kHz instead of 75 kHz. This
display mode is useful when you wish to view low deviation levels, e.g. those due to
the pilot tone or the subcarriers.
Power Good is a control and alarm function of the delivered power. When the output
Figure 5.1
Accensione
ESC
ESC
ENTER
Menu Funzione
Menu Potenza
Menu P.A.
Menu Impostazioni
ENTER
ENTER
ENTER
ENTER
Menu di Selezione
ENTER
Menu Versione
Menu Varie
ENTER
Menu Canali

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power goes below the Power Good threshold value, the machine changes the status
of a pin contained in the DB15 “Remote” connector located on the back panel (fig.
6.2 note [14] ).
The Power Good percentage value refers to the machine nominal power, i.e. 150W,
and not to the direct delivered power. Therefore if it is set on 80%, it will correspond
to 120W regardless of the set power.
5.4.2 Power menu (Pwr)
This screen shows the user the measurements related to the exciter power delivery:
•Direct power (Fwd)
•Reflected power (Rfl)
The values shown are “readings”, and therefore cannot be changed (notice the empty
triangle). To change the power setting, use the preset menu as described previously.
5.4.3 Power Amplifier menu (P.A)
This screen, consisting of three lines which can be scrolled with the UP and DOWN
keys, shows the user the measurements related to the device’s final power:
•Voltage (VPA)
•Absorbed current (IPA)
•Temperature (TMP)
5.4.4 Setting menu (Set)
This menu lets you read and set the working frequency.

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By pressing and keeping pressed ENTER, you can change the set frequency with
the UP (frequency increases) and DOWN keys.
After having set the new frequency value, press ENTER to confirm your choice; the
exciter will unlock from the current frequency (the “LOCK” LED goes off) and will lock
on a new working frequency (“LOCK” goes on again). By pressing ESC or allowing
the timeout to elapse, the frequency will remain set on the previous value.
5.4.5 Mix menu (Mix)
This menu lets you set the machine address in an I2C type serial bus connection:
The address of the I2C line is important when the exciter is connected in an R.V.R.
transmitting system that uses this type of protocol. However, we recommend you not
change it for no reason.
5.4.6 Versions menu (Vrs)
This screen shows you the software version and release date.

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5.4.7 Channels menu (L&R)
The right and left channel input levels are depicted with horizontal bars, as shown in
the following figure.
The hatched pointer indicates the level that corresponds with the total deviation at
100%, and is useful to regulate the input levels of the audio channels.

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6 External Description
This chapter describes the elements found on the front and back panels of the
TEX150-LCD/S.
6.1 Front Panel
Figure 6.1
[1] AIR FLOW Air flow passage grid
[2] ON Green LED, lit when the exciter is powered
[3] LOCK If on, it means that the PLL is locked to the reference frequency
[4] FOLDBACK Yellow LED, if on, it means that the foldback function is enabled
(automatic reduction of delivered power)
[5] R.F. MUTE if on it indicates that the exciter is not delivering power to
because it is bypassed by an external interlock
[6] CONTRAST Display contrast adjustment trimmer
[7] ESC Key to press to exit menu
[8] LEFT/UP Key for scrolling the menu system and for changing parameters
[9] RIGHT/DOWN Key for scrolling the menu system and for changing parameters
[10] ENTER Key for confirming a parameter and entering menus
[11] DISPLAY Liquid crystal display
[12] POWER ON/OFF key. Switches off the exciter without disconnecting the
mains power

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6.2 Back Panel
Figure 6.2
[1] PLUG Standard IEC socket for mains power supply, 90-260V 50-60Hz.
[2] AIR FLOW Air flow passage grid.
[3] R.F. OUT RF output connector, N-type.
[4] 24VDC IN + 24V external power supply connector. Positive pole.
[5] INTERLOCK IN BNC interlock connector: by grounding the central conductor the
transmitter is forced in stand-by mode.
[6] FWD EXT. AGC Trimmer for controlling the power delivered depending on the fold
FWD input.
[7] RFL EXT. AGC Trimmer for controlling the power delivered depending on the fold
RFL input.
[8] REMOTE DB15 connector for device telemetry.
[9] GSM ANT Reserved for future use.
[10] PHASE ADJ Adjustment trimmer for the pilot tone phase.
[11] MODE/MPX IMP Dip-switch for selecting both the transmission mode
(STEREO or MONO) and the MPX impedance input,
either 50W or 10kW.
[12] PREEMPHASIS Dip-switch for setting 50 or 75 ms preemphasis. Preemphasis
affects the right and left inputs in stereo mode and the mono
input. MPX inputs are not affected by the preemphasis setting.
[13] MPX/RDS Unbalanced MPX input BNC connector.
[14] MPX/RDS ADJ Trimmer for adjusting MPX input levels.
[15] SCA1 ADJ Trimmer for adjusting SCA1 input level.
[16] RIGHTADJ Trimmer for adjusting Right input levels.
[17] RIGHT XLR connector for Right channel audio input.
[18] IMPEDANCE Dip-switch for selecting the impedance of the balanced audio
inputs, either 600 W or 10 kW.
[19] P.S. FUSE Mains power supply fuse.
[20] R.F. TEST -30 dB output referred to output power level, suitable for
monitoring modulation. Cannot be used for spectral analysis.
[21] 24VDC IN - Connector for 24V external power supply. Negative pole.
[22] MODEM DB9 connector for interconnection with external modem.
[23] I2C BUS DB9 connector for I2C standard communication.
[24] GSM SLOT-IN Reserved for future use.
[25] SERVICE DB9 connector for programming factory parameters.
[26] RS232 DB9 connector for interfacing with telemetry equipment or the
GSM modem.
[27] EXT. REF 10MHZ Auxiliary input for 10MHz external reference for advanced
application in isofrequency.
[28] 19KHZ PILOT OUT Pilot tone output BNC connector, used for synchronizing external
devices such as the RDS coder.
[29] SCA1 BNC connector, unbalanced SCA1 input.
[30] SCA2 BNC connector for SCA2 input.

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[31] SCA2 ADJ Trimmer for adjusting the SCA2 input levels.
[32] LEFT-MONO ADJ Trimmer for adjusting LEFT-MONO input levels.
[33] LEFT-MONO XLR connector for LEFT-MONO channel audio input.