R.V.R. Elettronica PJ300M User manual

Manufactured by Italy
PJ300M
UserManual
Volume 1

PJ300M-UserManual
Versione 7.0
© Copyright 1993 - 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
PrintedandboundinItaly. No partofthismanualmaybereproduced,
memorized or transmitted in any form or by any means, eletronic or
mechanic, including photocopying, recording or by any information
storageand retrieval system, without thepermission of the copyright
owner.
File Name: PJ300_CAPITOLI.P65
Version: 7.0
Date: 25/07/2003
Document History
Date Version Reason Editor
05/09/01 6.0 First Version D. Canazza
25/07/03 7.0 Reduced Version J. Berti

Notification of intended purpose and limitations of product use
ThisproductisaFM transmitter intended for FM audio broadcasting. It utilises
operatingfrequenciesnotharmonisedintheintendedcountriesofuse.
Theusermustobtainalicensebeforeusingtheproductinintendedcountry of
use.Ensure respective country licensingrequirementsarecompliedwith.
Limitationsofusecanapplyinrespectofoperatingfreuency,transmitterpower
and/orchannel spacing.
Declaration of Conformity
Hereby,R.V.R.ElettronicaSpA,declares that this FM transmitter is in
compliancewith the essential requirementsandotherrelevantprovisions of
Directive 1999/5/EC.

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PJ300M
iUserManual Rev. 7.0-25/07/03
Table of Content
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. Installation and Use 9
5.1 Preparation 9
5.2 Operation 10
5.3 Protection System 11
6. External Description 13
6.1 Front Panel 13
6.2 Rear Panel 14
6.3 Connectors Description 15
7. Technical Specifications 17
7.1 Dimensional and Environmental Specifications 17
7.2 Electrical Specifications 17
8. Theory of Operation 19
8.1 Power supply section 19
8.2 R.F. Power Amplifier 20
8.3 Low Pass Filter 20
8.4 Alarms Card 20
9. Identification and Access to Modules 21
9.1 Modules Identification (top view) 21
9.2 Ordinary Maintenance 22
9.3 Substitution of modules 22
10. Internal Adjustment 25
10.1 Power Supply Adjustment (PSSW5010) 25
10.2 R.F. Power Amplifier Module Adjustment 25
10.3 Alarms Card Adjustment 26
10.4 Soft-Start Adjustment 27
10.5 Low Pass Filter adjustment 28
Appendix:
Component layouts, schematics, bills of material

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1. Preliminary instructions
Thismanualiswrittenasageneralguideforthosehavingpreviousknowledgeand
experiencewith this kind of equipment.
Itis not intended to containacompletestatementof all safety rules whichshouldbe
observedby personnel in using this orotherelectronicequipment.
Theinstallation,useandmaintenanceof this piece of equipment involve risks both
forthepersonnelperforming themandfor thedeviceitself,thatshall beusedonly by
trainedpersonnel.
R.V.R. doesn’t assume responsibility for injury or damage resulting from improper
procedures or practices by untrained/unqualified personnel in the handling of this
unit.
Pleaseobserve all localcodesand fire protectionstandardsinthe operations ofthis
unit.
WARNING: always disconnect power before opening coversorremoving any part
ofthisunit.
Useappropriategroundingprocedurestoshortoutcapacitorsandhighvoltagepoints
beforeservicing.
WARNING: This is a "CLASSA" equipment. In a residential place this equipment
cancausehash.Inthiscasecanberequestedtousertotakethenecessarymeasures.
R.V.R. Elettronica SpA reservestherighttomodify the design and/or thetechnical
specificationsof the product and this manualwithoutnotice.

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2. Warranty
Anyproduct of R.V.R. Elettronica is covered by a 12 (twelve) month warranty.
Forcomponentsliketubes forpoweramplifiers,theoriginal manufacturer’swarranty
applies.
R.V.R.extendstotheoriginalend-userpurchaseralloriginalmanufacturerswarranties
whichare transferable and all claims are tobemadedirectlytoR.V.R.per indicated
procedures.
R.V.R.'swarrantyshallnotinclude:
1) Re-shipmentoftheunittoR.V.R. for repairpurposes
2) Anyunauthorizedrepair/modification
3) Incidental/consequentialdamagesasa result of anydefect
4) Nominalnon-incidentaldefects
5) Re-shipmentcostsorinsurance of the unitorreplacementunits/parts
Warrantyshallcomeintoforcefrominvoicedateandfortheperiodofthemanufactures
warranty.
Anydamagetothegoodsmustbereportedtothecarrierinwritingonthe shipment
receipt.
Anydiscrepancyordamage discovered subsequenttodelivery,shallbereported to
R.V.R.within five (5) days from itsreceipt.
Toclaim yourrightsunderthis warranty:
a. Contact the dealer or distributor where you purchased the unit. Describe the
problemandaskifhehasaneasy solution.Dealers andDistributorsaresupplied
withall theinformationabout problemsthatmayoccurandusuallytheycanrepair
theunit quicker than whatthemanufacturercoulddo. Very ofteninstallingerrors
arediscoveredby dealers.
b. Ifyourdealercannothelpyou,contactR.V.R.inBolognaandexplaintheproblem.
Ifit is decided to return the unit to the factory, R.V.R. will mail you a regular
authorizationwith all the necessaryinstructionstosendback the goods.
c. Whenyoureceivethe authorization,youcan returntheunit. 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
responsiblefor damageorloss),until the packagereachesR.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
managerontheauthorization.

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DO NOT RETURN UNITS WITHOUTOURAUTHORIZATIONAS THEYWILLBE
REFUSED.
a Besuretoencloseawrittentechnicalreportwherementionalltheproblemsfound
anda copy of your original invoice establishingthestarting date of the warranty.
Replacementand warranty parts may be order from the following address. Be sure
to include the equipment model and serial number as well as part description and
partnumber.
R.V.R. Elettronica SpA
Via del Fonditore, 2/2c
40138 BOLOGNA
ITALY
Tel. [phone]

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3. First Aid
Thepersonnelemployedintheinstallation,useandmaintenanceofthedevice,shall
befamiliarwith theory and practice of firstaid.
3.1 Treatment of electrical shocks
3.1.1 If victim is not responsive
followtheA-B-C's of basic life support
• Placevictimflatonhis backon a hard surface.
• Openairway: lift up neck, push forehead back
• clearout mouth if necessary and observeforbreathing
• ifnotbreathing,begin artificialbreathing(Figure 2):tilthead, pinchnostrils,make
airtightseal,fourquickfullbreaths.Remembermouthtomouthresuscitationmust
be commenced as soon as possible
Figure 1 Figure 2
• Check carotid pulse (Figura 3); if pulse is absent, begin artificial circulation
(Figura 4) depressing sternum 1 1/2" TO 2" (Figure 5).
Figure 3 Figure 4 Figure 5
• APPROX. 80 SEC. : ONERESCUER,15COMPRESSIONS
• APPROX. 60 SEC.:TWO RESCUERS, 5 COMPRESSIONS,1 BREATH
• DO NOT INTERRUPT RHYTHM OF COMPRESSIONS WHEN SECOND
PERSONISGIVINGBREATH
• Call for medical assistance as soon as possible.

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3.1.2 If victim is responsive
•Keepthemwarm
•Keep them as quiet as possible
•Loosentheirclothing (arecliningpositionisrecommended)
•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 cleansheetorcloth(Cleansedavailableclotharticle).
•Donotbreakblisters, remove tissue, remove adhered particles of clothing,or
applyanysalveor ointment.
•Treat victim for shock as required.
•Arrangetransportationto a hospital as quickly as possible.
•Ifarmsorlegsare affected keep them elevated
Ifmedicalhelpwillnotbeavailablewithin anhour andthevictimisconsciousandnot
vomiting,give himaweak solutionofsalt andsoda:1 level teaspoonfulofsalt and1/
2level teaspoonful of baking soda toeachquartofwater(neither hot or cold). Allow
victim to sip slowly about 4 ounces (half a glass) over a period of 15 minutes.
Discontinuefluid if vomiting occurs
Donotgivealcohol
3.2.2 Less severe burns (1st and 2nd degree)
• Applycool(noticecold)compressesusingthecleansedavailable clotharticle.
•Do not break blisters, remove tissue, remove adhered particles of clothing, or
applysalve orointment.
•Applyclean dry dressing if necessary.
•Treat victim for shock as required.
•Arrangetransportationto a hospital as quickly as possible
•Ifarmsorlegsareaffectedkeep them elevated.

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4. General Description
RVRElettronica’sPJ300Misa19”rack-mountable,3HEhigh, solid-statebroadband
poweramplifierforFM audiobroadcasting.Itworkswithout adjustmentonthe whole
87.5- 108 MHz FM band and its power output is 300 W nominal withadrivelevelof
about10W.
The RF power section employs one high power MOSFET module, able to deliver
morethan 300 W.
The power supply is a switching mode one, and a “soft-start” circuit is included to
minimizethe transformer’scurrent spikes when the device is switched on.
The amplifier features a built-in protection system against situations than can be
dangerousfor the device like exceeding output power or reflected power, overdrive
orovertemperature. The protection system is conceived toreturnthemachineinits
normalstatusifthe conditions that generated thewarningsweretemporary.
Thefrontpanel includesan analogdisplaytomeasurethemainworkingparameters.
Thedifferentparametersare selected with a rotatingselector.
AseriesofLEDsonthefrontpanelgivetotheuserimmediatesignallingofconditions
thathavetobenoticed.ThegroupincludesfourredalarmLEDs(temperature,external
SWR, internal SWR, overdrive), a green LED that indicates the ON status of the
amplifierand a yellow LED that indicates if the machine is forced to stand-by status
byanexternalsignalthroughthe telemetryconnector.
On the telemetry connector the main parameters are availabe for the user as dc
voltagelevelsthatareproportionaltothevalueoftheparameterunderconsideration.
Abuilt-inlowpass filterkeepsthe harmonicemissionlevel belowtheCCIRandFCC
permittedthresholds.

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5. Installation and Use
Thischapterisintended tosummarizethe necessarypointsfor theinstallationof the
device. In case any of the topics herein are unclear, for example when you use the
amplifierfor the first time, pleasereadcarefullythewholemanual.
5.1 Preparation
Unpackthe amplifier and beforeany other operation check thatthe amplifier didn’t
sufferanydamageduringthetransport,andspecificallycheckwhetherallthecontrols
andconnectorsonthefrontandrearpanelsareingoodconditions.
Checkthemainsvoltage selector on the rear panel: the selectedvalue isindicated
by an arrow. If required, extract the selector block levering with a screwdriver (Fig.
5.1).Rotatetheblock untilthecorrectprinted value correspondswiththe arrow,and
thenreinsert thefuseblock.
Figure5.1
Ifit isnecessaryforyou to changethevoltage, check thevalueofthe fuseinsidethe
voltagechanger block. Therequiredvaluesare the following:
•Supply = 220 - 240 V 6,3A 5x20
•Supply = 100 - 120 V 10A 5x20
Theotherfusesintheamplifier, accesible from the rear panel,are:
•RFModule 10A 6,3X32
•AC Line for Exciter 2A 6,3X32
Verifythatthemainsswitchisin the OFF positon.
Connect to the RF input of the amplifier the RF Output of suitable exciter, able to
deliveran adjustablepowerbetween2 and20W(forexample theRVRElettronica’s
PTX30)using a coax cable terminatedwith N-type connectors; the excitershall be
setforminimumpowerandOFF.

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Linkoneof theAlarms/InterlockconnectorstotheInterlockconnectoroftheexciter,if
available (as it is in RVR Elettronica’s exciters). If the exciter you are going to use
hasnosuitableinterlockconnector,itis advisabletouseforitssupplythe plugcalled
“AC Line for exciter” on the rear panel of the amplifier. This plug is protected by a
relaythat is opened under the same conditions that trigger the “interlock” circuit.
Connectthe RF output totheantennacable or to a dummyloadwithsuitable power
rating.
Finally,connectapropercabletothe amplifier’smains input plug.
ATTENTION:It isessentialthat theunitis properlyearthedto ensureboththe safety
ofoperatonaswellasthecorrectworkingoftheequipment.
5.2 Operation
SwitchONtheamplifierandverifythegreen“ON” LED being it.
Theanaloginstrument,joinedwiththerotatingselector,isusedtovisualizetheworking
parametersof the unit (Fig. 5.2):
Figure5.2
Rotating Selector Position Full Scale Value Visualization Line
I 10 A 1
V 50 V 2
FWD 500 W 3
RFL 50 W 4
Checkontheanaloginstrumentusingtherotatingselectoriftheinternalsupplyvoltage
(parameter“V”) is 50V.Check that the standbycurrent(I)isapprox200mA.These
values confirm that the power supply is correctly operating and that the quiescent
settingoftheRFpowermoduleisall right.
Swith ON the exciter (set for minimum power) and wait for it to lock on the working
frequency.WhenthePLLlocked, progressively increasetheexciter’souput power,
whilechecking ontheamplifier’sinstrument itsemitted power(FWD).Alongwith the
increase in the emitted power, one can notice a proportional increase in the drawn
current(I).Keep increasing the exciter output power untiltheamplifierreaches the
desired level, that is at most 300 W.At this point, the normal working values for the

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PJ300M are:
•V ≅50 V
•I ≅8 ÷ 9,5 A
It is possible to verify the precision of the built-in wattmeter using an external
measurement instrument like a through wattmeter.An accuracy of 10% should be
considerednormal.
To check the functionality of the “alarms reset” button, push it while the amplifier is
transmitting.
ATTENTION:While thebutton ispushed,the power output of the amplifier is cut.
With the button pushed, verify that “FWD”, “V” and “I” are all reduced to 0. If the
connection of the interlock has been done correctly, the exciter power is also cut
whilethe button is pressed.
Releasingthe button,alltheparameters willreturntotheir formervalue.
Totest the amplifier protection system, youcanincreasethedriveleveluntilthe red
LED“overdrive” lights up. Theprotectionsystem is triggered bythis condition, and
the amplifier is disabled for about 10 seconds. The exciter is also disabled via the
interlockconnector.Afterthedelayintroducedbytheprotectionsystem,the amplifier
andtheexciterwillbe enabled again.
The device doesn’t require any human supervision for its normal operation. If any
alarmconditionarise,theseareautomatically managedby theembeddedprotection
system; if the protection system doesn’t succed in re-establishing the normal
conditions,itwillbenessarytoremovethecausesofthemalfunctioningandtomanually
resetthe system(usingthebutton “alarms reset”,orvia the telemetryconnector).
5.3 Protection System
Basically,the protection system of theamplifier forces it in standbymode incase a
situationthatisconsidered“dangerous”forthemachinetakesplace.
Afterapprox10seconds,theamplifierwillbereenabled.Ifinthemeantimetheblocking
condition has not been removed, the amplifier will be disabled again. After four
attempts the device will be disabilited for approx 90 seconds.
After this longer interval is expired, the amplifier starts a new cycle of disabling/
reenabling,analogoustothepreviousone.Ifattheendofthiscyclethefaultcondition
isstill present, theamplifierwillbe definitely disabled. Asalreadysaid,at this pointit
willbenecessarytomanually reset the amplifier using the button “alarms reset”,or
viathetelemetryconnector.
If, during the cycles of the protection, the amplifier works regularly for at least 90
seconds,the counters of the protection system arereset.

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6. External Description
ThischapterdescribesthefrontandrearpanelsofthePJ300M,withabriefindication
ofall thedifferentcomponents.
6.1 Front Panel
[1] Ext. St. By ExternalStandby LEDindicator
[2] On Indicateswhen theaplifier isswitched ON
[3] AlarmsReset Push the button to reset the alarm status
[4] On/ Off Mains switch
[5] Line AC line indicator
[6] Air Filter Airfilter ofthepoweramplifier
[7] Alarms Alarms indication LEDS:
TEMP Overheating
SWRANT Antenna SWR
SWRINT InternalSWR
OVERDRIVE Excessiveinputpower
[8] MeterSelector Workingparameters visualization selector:
V Voltageof theRF module
OFF Theindicatoris OFF
I Currentofthe RFmodule
OFF Theindicatoris OFF
REF Reflectedpower
FWD Forwardpower
[9] Meter Analogdisplay toshow theworking parameters

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6.2 Rear Panel
[1] Fan Fanforforcedventilation
[2] R.F. Test -60 dB RF sample, -60 dB with respect to the output level
[3] TelemetryConnector Connectorforremotemeasurement of workingparameters
[4] R.F. Input RFinput connector (“N” type)
[5] R.F. Output RFoutput connector(“N”type)
[6] Voltage Charger &A.C. Line Fuse
Fuseblock and voltagechanger. Use ascrewdriver to
change the fuse or the mains voltage. Rotate the block to
selectthe desired voltage
[7] Mains Voltage Socket Mains voltagesocket
[8] RF ModuleFuse RFmodule protection fuse
[9] A.C. Line for Exciter Auxiliary plug to supply an external exciter. This plug should be
used if the exciters doesn’t include an interlock connector
[10] Alarms/Interlock BNCconnector to put the connected devices(normally an
exciter) in stand-by mode when the amplifier is disabled. This
operationis performed puttingthe innerconductor to ground.