R.V.R. Electronica discovery User manual

Manufactured by Italy
DISCOVERY
User Manual

File Name: capitoli_en.p65
Version: 2.1
Date: 27/11/2003
Revision History
2.1 27/11/2003 New Version J. berti
Version Date Reason Editor
DISCOVERY-UserManual
Version 2.1
© Copyright 1999-2003
R.V.R.Elettronica SpA
Via del Fonditore 2/2c - 40138 - Bologna (Italia)
Telefono: [phone]
Fax: [phone]
Email: [e-mail]
Web: www.rvr.it
Allrightsreserved
Printedandbound in Italy.Nopartofthismanualmay be reproduced,
memorized or transmitted in any form or by any means, electronic or
mechanic, including photocopying, recording or by any information
storageandretrievalsystem,withoutwrittenpermissionofthecopyright
owner.

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iUser Manual Rev. 2.1-27/11/03
Table of Contents
1. Preliminary Instructions 1
2. Warranty 3
3. First Aid 5
3.1 Treatment of electrical shocks 5
3.2 Treatment of electrical Burns 6
4. General Description 7
5. Menù 9
5.1 Menù Detect 9
5.2 Priority Menu 10
5.3 Times and Levels: "Var" Menu 11
6. Operation 17
6.1 Heading 17
6.2 Operations 17
6.3 Trasferimento dati da P.C. alla CPU-SWITCH 18
7. External description 21
7.1 Front Panel 21
7.2 Rear Panel 22
7.3 Connectors Description 23
8. Technical Specification 25
8.1 Dimensional and Environmental Specifications 25
8.2 Electrical Specifications 25
9. Principles of Functioning 27
10. Setting and Impostation 31
10.1 1L Channel Input Level Selection 31
10.2 2L Channel Input Level Selection 32
10.3 MPX-1 Channel Input Level Selection 34
10.4 MPX-2 Channel Input Level Selection 34
10.5 MPX-M Channel Input Level Selection 35
10.6 Digital Inputs Polarity Selection (Switch) 36
10.7 MPX Channels S/N Control Selection 37
10.8 MPX Channel Stereo Detection Control Selection 38
10.9 MPX Channel 50ms/75ms De-Emphasis Selection 39
11. References 41
11.1 Meant of the LED 41
11.2 Legenda of the states of the software 43
Appendix:
Component layouts, schematics, bills of material

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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 SpAdoesn’tassumeresponsibilityforinjuryordamageresulting
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: alwaysdisconnect powerbefore opening coversor removing anypart
of this unit.
Use appropriate grounding procedures to short out capacitors and high voltage
points before servicing.
WARNING: thisdevice can irradiateradio frequencywaves, and ifit’snot 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 reservestherightto modify the designand/or thetechnical
specifications of the product and this manual without notice.

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2. Warranty
AnyproductofR.V.R. Elettronica iscoveredbya 24 (twentyfour) monthwarranty.
Forcomponentsliketubesfor power amplifiers, theoriginalmanufacturer’swarranty
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 danniverificatisi durante laspedizione della macchinaalla R.V.R.per eventuali
riparazioni;
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
Anydamage to the goodsmust be reportedtothe carrier inwritingon 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.
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.
Shipmentmust be effectedC.I.F.(PREPAID)to the addressspecifiedbyR.V.R.’s
service manager on the authorization
DO NOT RETURN UNITS WITHOUTOURAUTHORIZATIONASTHEY WILLBE
REFUSED

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4 Besuretoencloseawrittentechnicalreportwherementionalltheproblemsfound
andacopy of youroriginalinvoice establishingthestartingdateof 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]

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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 (Fig. 3-1).
• clear out mouth if necessary and observe for breathing
• if not breathing, begin artificial breathing (Figure 3-2): tilt head, pinch nostrils,
make airtight seal, four quick full breaths. Remember mouth to mouth
resuscitation must be commenced as soon as possible
Figure 3-1 Figure 3-2
• Check carotid pulse (Fig 3-3); if pulse is absent, begin artificial circulation
(Fig. 3-4) depressing sternum (Fig. 3-5)
Figure 3-3 Figure 3-4 Figure 3-5
• 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.

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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
• Applycool (notice cold)compresses usingthe 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. General Description
The Discovery control unit is an appliance that allows providing for audio black
outs.
If positioned in series with the transmitting appliance, it allows automatically
selecting the alternate audio in case of failures or damages to the main signal.
This appliance is extremely useful for those systems where one or more satellite
receivers combined with an already existing terrestrial backbone are used. The
receptionbysatelliteoffersexcellenttechnicaladvantages,butisvulnerable during
summerstorms. When thesemeteorological conditionsoccur,the high flowof rain
screens the radio carrier coming from the satellite, making the audio signal
unavailable,andtheblackouttimechanges from five to twentyminutes onaverage.
Discovery allows automatically changing over, according to the priorities entered,
up to four audio channels, two of which are composite (MPX) and two stereo.
The automatism is based on the detection of the selected channel functionality.
Operation times for the several detection modes and reset times may be
programmed.In caseofanalogdetection,operation thresholdsmaybeprogrammed
as well.
All operative parameters of Discovery may be downloaded/loaded by PC or
changedby displayandkeyboardinstalledontheappliancefrontpanel.Itispossible
to lock the operative configuration of Discovery by means of the software from
PC; in such situation, data may only be examined, but not changed.
The monitoring circuit of Discovery was designed with the always-present "Fault
tolerance"concept;therefore,if the network fusebreaksdown,the channel defined
as primary channel does not cuts off. Other solutions have been adopted and will
be described further on, in this manual.

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5. Menù
Oncethe Discovery is switchedon, it comesvisualizedthe loading display:
Afterthatappear the followingmaindisplay:
PressESC to displaymenus.Availablemenus arethefollowing ones:
5.1 Menù Detect
5.1.1 Stereo channel
Thedetecting method maybe selected bymeansof the software.Stereo channels
are available in two modes: with a hardware-type contact later defined as "Switch"
and a control on the amplitude of the signal defined as "Analog".
Contacts defined as Switch are equipped with a selection inside Discovery and
set the polarity: ON when is OFF and vice-versa (see section on settings). All
contacts are enabled to ground.
To change the detection, operates as follows:
1) Positionthe cursoronthe Detect menuandpress key OK.
2) Using the arrow keys, move the menu to the channel concerned and press key
OK.
3) Using arrow keys, scroll the several configurations and press key OK.
4) Press key ESC to go back to the previous menu.
5) Repeat point 2 to change another channel.
More controls may be also enabled at the same time per each channel, obtaining
as a result that, in case of failures, the channel will be changed over with the
prioritylevelimmediatelydown(functionOr).

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5.1.2 MPX Channels
Stereodetectingandnoisesignalratiocontrolhavebeenadded onchannelsdefined
asMPX. These signalsmay be disabledby means ofthehardware selection.
The signal defined as S/n is useful for detecting the presence of too high noise on
MPX channels. The Stereo signal allows warning when the stereo sub-carrier is
missing.
The S/N signal does not appear as an item of the software selection menu, but is
automaticallycombinedwithitemANALOG.Ifyoudonotwanttoenablethisappliance,
removethespecific jumper.
All MPX channels are provided with S/n and Stereo signals and may be selected
throughthehardwareinanindependentway.
To change the detection mode, operate as follows:
1) Movethe cursor totheDetect menu andpresskey OK.
2) Usingarrow keys, movethe menutothechannelconcerned and press keyOK.
3) Usingarrow keys, scrolltheseveralconfigurations and presskeyOK.
4) Press key ESC to go back to the previous menu.
5) Repeatpoint 2 to changeanotherchannel.
N.B.: When entering the changing menu, press key ESC to exit the changing
menu, before commutating the selector from the manual to the automatic mode.
Do not force this situation, otherwise the manual control is not accepted.
Unused MPX or stereo input channels have to be disabled.
5.2 Priority Menu
Thismenuallows defining the exchangeprioritiesregardless of the inputsequence
of signals on XLR and BNC connectors. The lowest number has the priority; for
instance, if channel 2 is assigned priority 1 and channel 1 is assigned priority 2,
the channel destined to the output is number two.
To change the detection mode, operate as follows:
1) Movethe cursor toPrior menu andpresskey OK.

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2) Usingarrow keys, movethe menutothechannelconcerned and press keyOK.
3) Usingarrow keys, scrolltheseveralconfigurations and presskeyOK.
4) Press key ESC to go back to the previous menu.
5) Repeatpoint 2 to changeanotherchannel.
Theseveralchannels:Ch.1,Ch.2,Mpx1andMpx2,whenenabled,mustbeassigned
thepriority.Thechannel with higherprioritymustbeassignednumber 1;accordingly,
theothers will havepriorities 2, 3,or 4.
It is impossible to assign two channels the same priority.
5.3 Times and Levels: "Var" Menu
Menu Var is made up of the following menus: start up time, analog off time, switch
off time, restore time, analog low level and analog high level.
5.3.1 Start-Up Time
The start-up time is enabled every time that Discovery is switched off. During such
periods, no exchange move is operated. We advise you not to set this time for a
periodlessthan15-20seconds.Theidealcondition is to set this period2-3 seconds
longer than the PLL synchronisation of the transmitting apparatus.
During the start-up phase, the keyboard is disabled and the display visualises
possible programmed text lines or the words "R.V.R. Elettronica".
5.3.2 Analog Off time
This parameter is associated with analog level. When a signal maintains under
the preset threshold in the "analog low level" field or exceeds the "Analog High
level" threshold for a period of time equal to or higher than the Analog Off Time,
the Discovery changes over the audio signals to the following channel defined in
the menu of priorities.
If the S/N control is enabled by means of the jumper, the off time is the same as
the time relevant to the analogue signals.

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5.3.3 Switch Off time
Thisparameter is associated withcontactscomingfromtheoutside.Whenacontact
keepsclosed (or opened)for a periodof time equaltoor longer thanthe Switch Off
Time, Discovery changes over the audio signal to the following channel defined in
themenuof priorities.
Ifthe control onthedetection of thestereo sub-carrier hasbeenenabled by means
of the jumper, the off time is the same as the commutating time associated with
the on/off contacts (only MPX).
5.3.4 Restore time
This feature determines the period of time during which the audio signal has to
keep within the parameters to be sent again to the output stage.This time is reset
if during the restore time itself, the signal is missing for a period equal to or higher
than theAnalog off time or Switch off time parameters. If, when the restore time is
elapsed, the channel status fails, the restore timer stops at the end of the
correspondingtime;if the channel restoresbeforeofftimes elapse, it canbesentto
theoutputstage; otherwise therestoretimewill be reset.
5.3.5 Analog Low Level
This parameter determines the threshold level that is lower than the audio and
below which the Analog Off timer is enabled.
5.3.6 Analog High Level
This parameter determines the threshold level that is higher than the audio and
above which the Analog Off timer is enabled.
To change the detection parameters, operate as follows:
1) Movethe cursor tothe Varmenuandpress key OK.
2) Usingarrow keys movethemenu to thefieldconcerned and press keyOK.
3) Usingarrow keys, scrolltheseveralconfigurations and presskeyOK.
4) Press key ESC and go back to the previous menu.
5) Repeatpoint 2 tochangeanother parameter.

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Tablesummarising level times thatmaybe selected
The control needs for four times:
Start Up Time (1 - 250 sec.).
CommutatingTime forAnalogueSignals. (5 - 255 sec.).
CommutatingTime for DigitalSignals. (5 - 255 sec.).
RestoreTime (1 - 30 min.).
MinimumLevel (-18 /-0.2 db).
MaximumLevel (+0.2 /+6 db).
When even one only control on the analogue signal is enabled, also specify the
minimumandmaximum level ithastobe performed.
5.3.7 Views: the "View" Menu
Duringstandardoperation, thedisplay visualises theanaloguelevel of thechannel
that is currently sent to the output stage.
When you want to check the level of a non-primary channel, you need to enter
menu View and select the desired channel. Even this menu is operative only if the
LED showing the manual status is ON.
To change the view channel parameters, operate as follows:
1) Movethe cursor tothe Varmenuandpress key OK.
2) Usingarrow keys, movethemenu to thefieldconcernedand press keyOK.
3) Usingarrow keys, scrolltheseveralconfigurations and presskeyOK.
4) Press key ESC to go back to the main menu.
5) Repeatpoint 2 tochangeanother parameter.

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5.3.8 Outputs: the "Out" menu
Puttingtheapparatusinthemanualmode,itispossibletosendtheseveralconnected
input signals to the output stages; this is especially useful in case of maintenance
operationsonthe station.
Output stages are two. The first one is called "out to stereo coder" and allows
transmitting already decoded signals.
Inputs that may be selected for this type of outputs are the forthcoming ones:
Chn-1, Chn-2, Mpx-1 (already decoded), Mpx-2 (already decoded)
The second output allows selecting MPX channels in a composite way.
Inputs that may be selected for this type of output are the following ones:
Mix, Mpx-1,Mpx-2, Mpx-M
Mpx-typeoutputshavebeenconveniently provided with three connectorsand each
oneofthemhasbeenprovidedwithalow-impedancebuffer.Outputsaredenominated
as MPX A OUT, MPX B OUT, MPX C OUT and the output signal may be taken
indifferently.
The mix signal allows mixing stereo channels that are in outputs, moving them
againtothe MPX-type outputs.Thistypeof device isusedin case no MPXchannel
hasbeenprovided. The mix signaldoesnot contain any stereophonicinformation.
To change the channel designed for the output defined as stereo code, operate as
follows:
1) Movethe cursor tothe Outmenuandpress key OK.
2) Usingarrow keys, movethemenu to thefieldconcernedand press keyOK.
3) Presskey OK.
4) Usingarrow keys, move the cursor to theinput that you wantto output.
5) Presskey OK.
6) Repeatpoint 3 tochangeanother parameter.
7) Press key ESC to go back to the previous menu.

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Tochangethe channel intendedfortheoutput defined as MPX,operateasfollows:
1) Movethe cursor tothe"out to stereocoder"menu.
2)Press the DOWNarrow.
3) Press key OK.
4)Usingthearrowkeys,movethe cursors to the inputthat you wantto output.
5) Press key OK.
6) Repeat point 3 to change another parameter.
7) Press the UP arrow to go back to the previous menu.

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