R.V.R. Electronica RX1-NV LCD User manual

RX1-NV LCD
User Manual

RX1-NVLCD-UserManual
Version 1.2
© Copyright 1999-2001
R.V.R.ElettronicaSpA
Via del Fonditore 2/2c - 40138 - Bologna (Italia)
Telefono: [phone]
Fax: [phone]
Email: [e-mail]
Web: www.rvr.it
Allrightsreserved
PrintedandboundinItaly. No part ofthismanualmaybereproduced,
memorized or transmitted in any form or by any means, electronic or
mechanic, including photocopying, recording or by any information
storageandretrievalsystem,withoutwrittenpermissionofthecopyright
owner.
File name: capitoli_en.p65
Version: 1.2
Date: 13/12/2001
Revision History
1.2 13/12/2001 Update of the technical appendix J. Berti
Version Date Reason Editor

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Table of Contents
1. Preliminary Instructions 1
2. Warranty 3
3. First Aid 5
3.1 Treating electric shocks 5
3.2 Treating electric burns 6
4. General Description 7
5. Quick Start 9
5.1 Using the encoder 9
5.2 Preparation 10
5.3 Operation 10
5.3 Adjusting 13
6 External Description 15
6.1 Front panel 15
6.2 Rear panel 16
6.3 Connectors description 16
7. Operating System 19
7.1 Exchange menu (“Exit”) 20
7.2 Board Set 20
7.3 General Setting 20
7.4 Auto 21
7.5 Alarm 22
7.6 Meter 24
7.7 Diagnostics 25
7.8 Power Supply 25
7.9 Stereo Set 25
8. Technical Specifications 27
8.1 Physical specifications 27
8.2 Electrical Specifications 27
9. Internal Description 29
9.1 Modules Identification 29
9.2 Configuration 30
9.3 Frequency setting for tuned front-end 30
Appendix:
Component layouts, schematics, bills of material

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1. Preliminary Instructions
Thismanualisdesignedtoprovideageneral guidetoskilled andqualifiedpersonnel,
whoareawareofthedangersthatmayarisewhenhandlingelectricandelectronic
circuits.
It does not aim to provide a complete description of all the safety precautions that
must be observed by people who use this or similar equipment.
The installation, operation, maintenance and use of this equipment involve risks
both for people and the equipment itself, which must be handled only by
experienced technicians.
R.V.R. Elettronica SpA does not assume responsibility for injuries to persons or
damage to items caused by improper use or incorrect usage procedures, whether
the users are experienced or not.
Users should observe local regulations and fire-prevention rules while installing
and using this equipment.
WARNING: always disconnect the power before opening covers or removing any
part of the equipment.
Takeappropriateearthingmeasurestodischargethecondensersand high voltage
points before doing any maintenance work.
WARNING: this equipment may radiate radio-frequency energy, and if it is not
installed according to the instructions, may cause troublesome interference to
radio communications.
Operating this equipment in a residential environment may give rise to radio
disturbance; if so, the user may be asked to take appropriate counter measures.
R.V.R. Elettronica SpA reserves the right to make modifications to the design
and technical specifications of the equipment, and to update this manual without
notice.

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2. Warranty
The guarantee, which is for 12 (twelve) months, is valid for any R.V.R. Elettronica
product.
On components such as valves for finals, the manufacturer’s guarantee applies.
R.V.R. Elettronicaextendsalltransferableoriginal guarantees to its own products.
To ensure that servicing is carried out properly and as fast as possible, the work
shallbehandledbyR.V.R. Elettronica; any claims should be sent directly to R.V.R.
Elettronica, in accordance with the defined procedures.
The warranty does not include:
1 damage while the equipment is being shipped to R.V.R. for repairs;
2 any unauthorized modification or repair;
3 accidental damage, or damage not due to defects in the equipment;
4 nominal damage not accidental;
5 shipping the equipment and insuring it, and replacement of parts or units.
Any damage to the equipment caused during shipment must be reported to the
transporters and notified in writing on the forwarding receipt.
Any difference or damage discovered after delivery must be reported to R.V.R.
Elettronica within 5 (five) days from the delivery date.
To take advantage of the guarantee, adopt the following procedure:
1 Contact the retailer or dealer where you bought the equipment; describe the
problem or fault to check if there is a simple solution.
Retailers and Distributors can provide full information on the problems that
occur most frequently; they can normally repair the equipment much faster
than the manufacturer
2 If your dealer cannot help you, contact R.V.R. Elettronica and describe the
problemtothem;ifnecessary, you will be sent authorization with the necessary
instructions;
3 When you have received authorisation, return the equipment carriage paid to
the address specified.
Pack it carefully, if possible in the original packing, and seal the package.
Donotreturnthemachinewithoutpriorauthorization,otherwiseitmaybereturned
to you
4 Quote the machine’s type, model and serial number; attach a written technical
diagnosis listing all the problems and faults encountered, and enclose a copy
of the invoice.

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Replacement of parts under guarantee or spare parts can be ordered from the
following address:
R.V.R. Elettronica SpA
Via del Fonditore, 2/2c
40138 BOLOGNA
ITALY
Tel. [phone]
quoting type, model and serial number of the device.

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3. First Aid
Personnel involved in the installation, use, and maintenance of the equipment
must be familiar with the theory and practice of first aid.
3.1 Treating electric shocks
3.1.1 If the victim is inconscious
Follow the first aid principles described below.
• Lay the victim down on his back on a rigid surface
• Free the respiratory tracts by raising the neck and pushing the forehead back
(Figure 1).
• If necessary, check the breathing of the victim opening his mouth.
• If the victim is not breathing, start artificial respiration immediately (Figure 2):
incline the head, close the nostrils, apply your mouth to the victim’s and make
four fast respirations.
Figure 1 Figure 2
• Check the heart beat (Figure 3); if there is none, start a cardiac massage
immediately (Figure 4) pressing the sternum approximately at the centre of the
chest (Figure 5).
Figure 3 Figure 4 Figure 5
• If there is just one person providing first aid, he must adopt a rhythm of 15
compressions and 2 fast respirations alternately.
• If there are two persons, the rhythm must be 1 respiration and 5 compressions
alternately

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• Do not interrupt the cardiac massage during the artificial respiration.
• Call a doctor as soon as possible
3.1.2 If the victim is conscious
•Cover the victim with a blanket
•Keep him calm.
•Loosen the victim’s clothes and keep him lying down
•Call a doctor as soon as possible
3.2 Treating electric burns
3.2.1 Large-scale burns and serious cuts
•Cover the area concerned with a sheet or a clean cloth.
•Do not break the blisters; remove any fabric and parts of clothing that may be
attached to the skin; apply a suitable ointment.
•Treat the victim depending on the type of accident.
•Take the victim to hospital as soon as possible.
•If the arms and legs are injured, keep them raised.
If no medical help is available within an hour and the victim is conscious and has
not retched, administer a liquid solution of salt and bicarbonate of soda: 1
teaspoonful of salt to every 250ml of water.
Get the victim to slowly drink half a glass of the solution, four times, over a period
of 15 minutes.
Stop the treatment if the victim starts to retch.
Do not administer alcoholics!
3.2.2 Less serious burns
•Apply cold gauze compresses (not iced) using a clean cloth (i.e. as clean as
possible).
•Do not break any blisters; remove any fabric and parts of clothing that may be
attached to the skin; apply a suitable ointment.
•If necessary, dress the victim in clean dry clothes.
•Treat the victim depending on the type of accident.
•Take the victim to hospital as soon as possible.
•If the arms and legs are injured, keep them raised.

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4. General Description
RVR Elettronica’s RX1-NV is a professiona FM receiver with harmonic distortion
lower than 0.1%. Its audio characteristics make it suitable for broadcasting
applications, where high fidelity performances are needed.
Its external box is 2HE high and mountable on standard 19” racks.
The user interface comprises a graphic LCD display and a knob (encoder). Using
this elements, it is possible to read all the working parameters of the device and to
modify the changeable parameters, for example the working frequency or the
audio output configuration.
In the standard version of the receiver, the demodulated signal is provided to the
user in the form of MPX (that is, the composite baseband signal) as well as in the
form of mono. There are also two connectors for the output of RDS or SCA
subcarriers.
As an option, the RX1-NV can be equipped with a stereo decoder section. In this
version, the output of the device comprises the left and right channels, the MPX
signal and the possible subcarriers.
Two types of RF front-end sections are available.
The standard version employes a RF filter that is tuned on the working frequency;
this kind of front-end is particularily suitable when the receiver is part of a
retransmitting system, since it gives the best quality in the received signal.
Optionally, the RX1-NV can be equipped with an input section featuring a RF filter
thatisautomaticallytuned bythecontrolsoftwarewhen acertainworkingfrequency
is selected. This kind of front-end also includes a double antenna input; the used
antenna input is selectable via software.
The RX1-NV is designed in a modular way: the different functionalities are
performedbymodulesthat are directlyconnectedwithmaleand female connectors
or using connector-terminated flat cables. This kind of design facilitates the
maintenance or the possible substitution of the modules.
The receiver’s control software implements an alarms system that is completely
user-configurable. Among the possibilities, an important one is the capability of
changing the working frequency if an alarm is raised.
The RX1-NV can also be fitted with a RDS board, than enables the user to
controlthe different RDS parameters and to manage alarms as a function them.
The RX1-NV offers an auxiliary audio input, that is particularily useful when one
doesn’t want to let silence intervals to go on air: if an audio signal is connected to
this input, it will be routed to the audio output of the receiver as soon as the muting
function is triggered.

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5. Quick Start
Thischaptergivesa conciseviewofthepoints thatarenecessaryforthe installation
of the device. If any item is not completely clear, for example when you use the
receiver for the first time, we strongly suggest to read throughly the manual and
the description of the operating system.
5.1 Using the encoder
The interaction between the user and the receiver’s control software is performed
using the encoder (fig. 5.1).
Figure 5-1
The operations supported by the encoder are:
•rotation: moves the cursor shown on the display; if you turn the encoder to the
left (counterclockwise), the cursor moves downwards, if you turn it right the
cursor moves upwards; it also permits to increase or diminish the parameters
(turning the encoder left diminishes the parameter, turning it right increases it)
or to select an item form a list of options
•pushing: push the button once when the cursor is on the name of a menu to
enter in that menu, push it when the corsor is on the name of a parameter to
enter in modification mod (the cursor starts blinking); after the modification of
a parameter, push the button to save the new value.
After having modified the value of a parameter, the cursor goes on blinking for
approximately 30 seconds, waiting for confirmation from the user. If the user
doesn’t confirm the new value (i.e., the button is not pressed), the device emits
a sound to indicate that no modification has been saved; the cursor stops
blinking and remains on the selected parameter.
Turntheencodercounterclockwise
to move the cursor downwards, to
decreasethevalueofaparameter
ortochoose an elementfromalist
of possibilities
Turn the encoder clockwise to
move the cursor upwards, to
increase the value of a parameter
ortochooseanelementfromalist
of possibilities
Push the button once to enter in the desired
menu, to enter in modification mode or to
confirm a choice

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5.2 Preparation
Unpack the receiver and before any other operation make shure that no damage
due to the transport is present. In particular, inspect the conditions of all the
connectors.
Check if the mains voltage is correct for your site. The selector is on the rear panel
andtheselectedvalue is indicated byanarrow.Ifrequired,extract the fuse/selector
block levering with a little screwdriver. Rotate the block until the correct printed
value corresponds with the arrow, then reinsert it.
The correct value for the mains fuse is 2 A.
Verify that the mains switch of the unit is on the OFF position.
ConnecttotheRFinputofthereceivertheantennacable.Ifyourreceiverincludes
the double RF input option and you use only one antenna, we suggest to use the
input called A1.
Connect the mains power supply cable to the relative socket.
NOTE: this piece of equipment shall be correctly connected to earth.
This is necessary both for safety reasons and to obtain the receiver's correct
performances.
Finally, connect the audio output of the receiver to the devices that will use it,
depending on the configuration of your installation.
5.3 Operation
Warning: Before using the receiver for the first time, we suggest to get familiar
with the machine’s control system reading this manual in full, and specifically
chapter 7 (operating system).
Switch the receiver on using the switch on the front panel.
At start up, all the LEDs on the front panel are briefly switched on to permit the
verificationoftheir functionality.Thedisplay thenshowssomeinformationregarding
the model of the device (fig. 5.2).
Figure 5-2

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If the receiver is working correctly, the LEDs “alarm” and “waiting” will be off. The
respective meanings are that the power supply is correct, and that the PLL is
locked on the working frequency.
Atthispoint,thesoftware enters the maincycle,displayingthedefaultscreen.
Figure5-3
Thedefaultscreencanbedividedin the following part:
•Left column: status icons. The icons that can be shown are the following:
The PLL is locked
This icon is present if the receiver is working on the backup setup
(frequency and antenna)
Indicates that the working frequency is centered with respect to the
received carrier
This icon means that the auxiliary input is routed to the audio output.
This situation is bound to the intervention of the muting functionality.
This icon is present if the received program is stereo (only with
Stereo decoder or/and RDS decoder options)
Indicates that the RDS signal is correctly received (only with RDS
decoder option)
•On the right of the icons, there is a double VU-meter column that indicates the
instantaneous modulation level. 100% in this scale corresponds to a standard
75 kHz modulation
•The upper part of the screen contains the following indications:
•Working frequency (modifiable)
•Antenna used (A1 or A2, modifiable only when the tuneable RF front-end is
present)
•Offset between set and received frequencies
•Analog representation of the received signal level
•Muting level setting
•In the lower part of the screen, there is a bar (inverted visualization) indicating
the status of the automatic managment system of the machine
Mut This is the “muting” status. Off indicates that the muting function is
idle, so that at the receiver’s output there is the received signal; On
indicates that the muting is activated, so that the receiver’s output is
silenced, or replicates the Aux In, if such input is used.

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Note:thevisualizationofthefollowingstatesisenabledonlyifthereceiverisconfigured
forautomaticalarmsmanagement
Ant “Antenna”: Off indicates that automatic commutation on the backup
setup (frequency and antenna) is disabled. It corresponds to the
menu item Admin −> Auto −> Auto Off
Sig “Signal”, indicates the activation (On) of the automatic system
depending on the receiver signal level. It corresponds to the menu
item
Admin −> Alarm −> Signal Alm −> Rescue
Aud “Audio”, indicates the activation (On) of the automatic system
depending on the demodulated audio level in the received signal.
It corresponds to the menu item
Admin −> Alarm −> Audio Alm −> Rescue
Ste “Stereo”, indicates the activation (On) of the automatic system
depending on the pilot tone level in the received signal. It
corresponds to the menu item
Admin −> Alarm −> Stereo Alm −> Rescue
RDS “RDS”, indicates the activation (On) of the automatic system
depending on the correctness of the received RDS frames.
It corresponds to the menu item
Admin −> Alarm −> RDS Alm −> Rescue
•In the right part of the default screen there is the menu item ([Admin]) that
permits to go on to the administration menus. This element is visible only when
one is in “input mode”, that is when the encoder is moved.
Tipically, the operations that are necessary to perform at the first start-up of the
receiver are the following:
•(Only if automatic alarms management is enabled) - Verify in the status bar of
the default menu that the audio output “AFO” is set on “Rec” and that the
various automatic settings are all disabled (Off)
•(Only if the tunable front-end is present) - With the encoder, select the antenna
inputtobeused.Eachtimeyoupushtheencodertheantennainputisswitched
•Set the working frequency:
• with the encoder select in the default menu the item “frequency”
•push the encoder to enter in the frequency modification menu
•push the encoder on the frequency value to enter in modification mode
•turn the encoder until the desired frequency is reached; when the set
frequency is at the center of a received radio station, the icon is
shown.
•push the encoder to store the new frequency
•confirm your choice pushing the encoder on “Yes”
•push the encoder on “Exit” to go back to the default screen

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•Setthedesiredmutinglevelasdescribedhereafter:
•with the encoder, select in the deafult screen the line related to the muting
level
•push the encoder to enter in edit mode
•rotate the encoder to select the desired muting level
•push the encoder to store your selection
Pleserememberthatifyoufeed thereceiverwithanaudiosignalusingtheAuxIn
input,whenthemuting function isactivatedthesuppliedaudio signalisroutedto
thereceiver’soutput.Ifnoauxiliary audioisused,the mutinginterventionwilljust
producesilenceatthe output.
•Ifitisnecessary, check the settings of the audio section (ADMIN −> BdSet) and
ofthestereoboardifit’spresent (ADMIN −>StSet).Toknowmoreaboutthese
menus,pleasecheckchapter7.
•If the device is configured for automatic alarms management, set the related
parameters. For details, see chapter 7.
5.3 Adjusting
The only adjustments that have to be manually done on the RX1-NV are those
related to the output levels.
On the rear panel, you will find a trimmer for each of the independent output.
Whenyouinsertthe receiverinasystem, youwillhavetoadjust theleveldepending
on your system configuration.
On the front panel there is a mono jack plug for phone output. Above the plug, a
trimmer permits to adjust the level.
Using the software, it’s possible to adjust all the parameters of the alarm system.
The different parameters and the working principles of the alarm system are
described in chapter 7.
For receivers fitted with tuned RF front-end, changing the working frequency
requires the intervention of technically skilled personnel and the use of suitable
instruments. The procedure to be used is described in chapter 9.

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6 External Description
Thischapterdescribesthedifferent elements thatcanbeseenonthefront and rear
panelsofRX1-NV.
6.1 Front panel
Figure6-1
[1] MPX MPX Output Monitor BNC connector
[2] IF IFmonitorBNC connector
[3] VOL Regulation trimmer for the phone plug
[4] PHONE Jack plug for phone output
[5] WORKING Green LED, lit when the device is working
[6] WAITING Yellow LED, lit when the receiver is waiting for the PLL to lock
[7] ALARM Red LED, lit if the receiver is out of order
[8] DISPLAY LCD graphic display
[9] ENCODER Knob/button to control the machine
[10] MAINS Mains supply switch
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6.2 Rear panel
Figure6-2
[1] PLUG mainsplugwithfuse and voltage changer
[2] TELEMETRY DB25femaleconnector for telemetry signals
[3] FAN fan for forced ventilation
[4] RS232 DB9 female connector for direct or modem serial communication
[5] RDS DB9 female connector for RDS output (if installed)
[6] 19KHz BNC for regenerated 19 kHz subcarrier
[7] Trimmers Output level adjusting trimmers
[8] Dip Switch miniswitch for XLR connectors grounding configuration
[9] L/Mono XLR connector for Left/Mono output
[10] R/MPX XLR connector for Right/MPX output
[11] ANTENNA N-type connector for antenna input (A1)
[12] ANTENNA N-type connector for antenna input (optional, A2)
[13] 24V + 24Vcc positive input connector (red)
[14] FUSE Vcc supply fuse
[15] 24V - 24Vcc negative input connector (black)
[16] AUX IN Auxiliary audio input
[17] SCA 1 BNC connector for SCA/RDS output
[18] SCA 2 BNC connector for SCA/RDS output
[19] MPX 50 Ωdemodulated MPX signal output, buffered to drive a 50 Ωload with up to
250 mt RG58 cable
[20] R/MPX BNC connector for Right/MPX output (in parallel with [10])
6.3 Connectors description
6.3.1 Audio output
Type: XLR female
1 Ground
2 Signal (+)
3 Signal (-)
This description is valid for balanced configuration.
In unbalanced configuration, pin 3 is at ground.
The possible configurations of XLR connectors are described on the rear panel.
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