R.V.R. Elettronica VJ2000 User manual

Prodotto da Italia
VJ2000
User Manual

VJ2000-UserManual
Version 4.0
© Copyright 1995-2001
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 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.

Notification of intended purpose and limitations of product use
ThisproductisaFMtransmitterintendedforFMaudiobroadcasting. It utilises
operatingfrequenciesnotharmonisedintheintendedcountriesofuse.
Theuser must obtain a licensebeforeusingthe product in intended country of
use.Ensure respective countrylicensingrequirementsare complied with.
Limitationsofusecanapplyinrespectofoperating freuency,transmitterpower
and/orchannel spacing.
Declaration of Conformity
Hereby,R.V.R.ElettronicaSpA,declaresthatthisFMtransmitterisin
compliancewith the essentialrequirementsandother relevant provisions of
Directive 1999/5/EC.

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VJ2000
iUSER MANUAL Rev. 4.0 - 26/02/01
Table of Content
1. Preliminary instructions 1
2. Warranty 2
3. First Aid 4
3.1 Treatment of electrical shocks 4
3.1.1 If victim is not responsive 4
3.1.2 If victim is responsive 5
3.2 Treatment of electrical Burns 5
3.2.1 Extensive burned and broken skin 5
3.2.2 Less severe burns (1st and 2nd degree) 5
4. General Description 6
4.1 MechanicalDescription 6
4.2 ElectricalDescription 6
4.3 Controls and Indicators 6
4.4 Pritection System 7
4.5 Specifications 7
5. Electrical Description 10
5.1 Introduction 10
5.2 Power Supply 10
5.3 Protection Card 10
5.4 Tube 10
6. Installation Procedure 25
6.1 Introduction 25
6.2 Unpacking 25
6.3 Fitting the Tube 25
6.4 Connection andSetup Procedures 25
6.5 Fault Findingduring theSetup Procedure 27
7. Maintenance Procedure 29
7.1 Safety Procedures 29
7.2 RoutineMaintenance 29
7.3 Replacements of the Components 29
7.4 Replacementof the Tube 30
7.5 Changingthe Rear GrillAir Filter 30
7.6 Changing the Front GrillAir Filter 30
8. Calibration Procedure 31
8.1 Frequency Changes 31
8.2 Calibration ofthe Protection Board 32
8.3 Calibration of theGrid Current Meter(IG) 34
8.4 Calibration ofAnode Current Measurement(IA) 34
8.5 Calibration of HeaterVoltageMeasurement (HEATER) 34
8.6 Calibration ofPlate VoltageMeasurement(PLATE) 35

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ii USER MANUALRev. 4.0 - 26/02/01
8.7 Calibration of thePWRMeter(FWD-PWRLECTURE) 35
8.8 Calibration of the PWRMeter(REF-PWRLECTURE) 36
9. Connectors Description 41
9.1 Telemetry Connector 41
10. Telemetry Card Option 42
10.1 Calibration of the Voltages on the Telemetry connector 42
10.2 Wiring Connections details 42
10.3 General Verifications 43
Appendix 44

VJ2000
1 / 44USER MANUAL Rev. 4.0 - 26/02/01
1. Preliminary instructions
This manual is written as a general guide for those having previous knowledge
and experience with this kind of 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. 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 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.

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2. Warranty
Any product of R.V.R. Elettronica is covered by a 12 (twelve) month warranty.
For components like tubes for power amplifiers, the original manufacturers warranty
applies.
R.V.R. extends to the original end-user purchaser all original manufacturers
warranties which are transferable and all claims are to be made directly to R.V.R.
per indicated procedures.
R.V.R.'s warranty shall not include:
1) Re-shipment of the unit to R.V.R. for repair purposes
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
Warranty shall come into force from invoice date and for the period of the
manufactures warranty.
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. within five (5) days from its receipt.
To claim your rights under this warranty:
a. Contact the dealer or distributor where you purchased the unit. Describe the
problem and ask if he has an easy solution. 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.
b. If your dealer cannot help you, contact R.V.R. in Bologna and explain the
problem. If it is decided to return the unit to the factory, R.V.R. will mail you a
regular authorization with all the necessary instructions to send back the goods.
c. 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.

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3 / 44USER MANUAL Rev. 4.0 - 26/02/01
DO NOT RETURN UNITS WITHOUT OUR AUTHORIZATION AS THEY WILL
BE REFUSED.
a 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 order 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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4 / 44 USER MANUALRev. 4.0 - 26/02/01
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 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
 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 (Figura 3); if pulse is absent, begin artificial
circulation(Figura 4) depressing sternum 1 1/2" TO 2" (Figure 5).
Figura 3 Figura 4 Figura 5
 APPROX.80SEC.:ONE RESCUER, 15 COMPRESSIONS
 APPROX.60SEC.: TWORESCUERS,5 COMPRESSIONS, 1 BREATH
 DO NOT INTERRUPT RHYTHM OF COMPRESSIONS WHEN SECOND
PERSON IS GIVING BREATH
 Callformedicalassistanceassoonaspossible.

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5 / 44USER MANUAL Rev. 4.0 - 26/02/01
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 (Cleansed available cloth article).
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 (1st and 2nd degree)
 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. General Description
4.1 MechanicalDescription
The VJ2000 is housed in a 19" rack-mountable frame, 20U high, of which 8U are free
and may be used for an exciter, a receiver or other equipment.
All controls and switches are situated on the front panel together with two analog meters.
There are no connectors on the rear panel.
Both the cooling air inlet complete with fan and filter, and the power cable entry hole may be
found on this panel.
A flue may be found on the top of the unit for the expulsion of hot air used for coooling the
unit, together with the RF output connector (to be connected to the antenna).
4.2 ElectricalDescription
The VJ2000 is a tube amplifier with an earthed grid allowing a wide-band input (no
calibration across the band) from 87.5 to 108MHz.
This amplifier is able to generate an output power of over 2KW from an input power of
approx. 60W. The amplifier features motorized anode and load matching across the entire
operational band.
The VJ2000 is available in single phase version or three phase version.
4.3 Controls and Indicators
Three analog meters are present on the front panel; one measures direct and reflected
power output (2 Fig.1), one measures plate and grid currents (4 Fig.1), the last measures
heater and plate voltage (6 Fig.1).
The meter for the measurements of the direct and reflected power has two scales too; one
for 250W f.s. to measure reflected power output, the other for 2.5KW f.s. to measure direct
power output.
The meter for the measurements of the grid and plate currents has two scales too; one for
1A f.s. to measure plate current, the other for 100mA f.s. to measure grid current.
The meter for the measurements of the heater and plate volatge has two scales too; one for
5KV f.s. to measure plate voltage, the other for 10V f.s to measure heater voltage.
For each of these meters there are the relative reading selector
(3,5 and 7 Fig.1).
In central position there are some switches and led indicators that concern to the plate and

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7 / 44USER MANUAL Rev. 4.0 - 26/02/01
load tuning: the two led indicators signal respectively the stop for the plate tuning at 87.5
MHz (9 Fig.1) and at 108 MHz (10 Fig.1), while the three selectorsare used rispectively for to
enable the engines of tuning (8 Fig.1), for the plate tuning (11 Fig.1) and for the load tuning
(12 Fig.1).
Then there are three led indicators that signal alarms: for an excess of S.W.R. (13 Fig.1), for
insufficient fan pressure (15 Fig.1) and for an excess of grid current (14 Fig.1).
The following are present on the front panel: an HT indicator (16 Fig.1) which signals that the
high voltage supply is active; a switch to activate the HT supply, or put the unit in stand-by (19
Fig.1); an on-off switch (18 Fig.1) and corresponding indicator (17 Fig.1); an hours counter
(20 Fig.1) to show the total number of hours that the unit has been operational.
4.4 Pritection System
The VJ2000 features protection against: excess VSWR, excess grid current, opening
of panels with the unit active, and insufficient ventilation.
Under abnormal conditions the unit will be automatically disactivated; after 90 seconds the
protection system will re-activate the unit if the condition has returned to normal, unless a
panel is still open or the cooling system lacks sufficient pressure.
In this event, the procedure is repeated four times, after which the unit will remain disactivated
for 15 minutes.
If, after 15 minutes, the condition is still present, four more switch-on attempts are made,
after which the unit is shut down indefinately.
Should, during these cycles, the fault condition dissappear and the protection system succeed
in re-activating the unit for more than 15 minutes, the fault condition counter will be reset to
zero.
N.B. The times indicated above are approximate and may vary considerably.
4.5 Specifications
Please refer to Table A for the electrical specification and Table B for dimensional and
environmental specifications.

VJ2000
8 / 44 USER MANUALRev. 4.0 - 26/02/01
TABLEA
ELECTRICALSPECIFICATIONS
PowerSupply Singlephase: 220-240V,50-60 Hz
Threephase: 220-240V,50-60Hz
380-415V,50-60Hz
FrequencyRange 87.5-108MHz(othersonrequest)
OutputPower 1800-2000Watts
RFOutputImpedance 50Ohm
RF Output Connector LCConnector
EIA7/8"Flange
EIA7/16"Flange
RF Input Impedance 50Ohm
RF InputConnector "N"typeconnector
RF Input Power 50Wtypical,max70W
Tube EIMAC3CX1500A7StandardVersion
Cooling System Forcedventilation
Harmonic and Spurious Meets or exceeds FCC and CCIR
Signal Suppression: regulations

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9 / 44USER MANUAL Rev. 4.0 - 26/02/01
TABLEB
DIMENSIONALANDENVIRONMENTALSPECIFICATIONS
Rack Dimensions: 540mm(21.26")W
590mm(23.23")D
965mm (37.99")H
Panel Dimensions: 483mm (19")W
533.4mm (21")H
Weight: approx130 Kg
Operating Temperature Range: from -10° to +50°C
Maximum Humidity: 95% non-condensing

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10 / 44 USER MANUALRev. 4.0 - 26/02/01
5. Electrical Description
5.1 Introduction
This section describes in detail, the operation of the VJ2000.
For ease of description, the unit has been divided into sections, each of which is described in
detail, below.
5.2 Power Supply
The power supply, accessible via the rear panel, has been designed to be both rugged
and at the same time simple to maintain, allowing easy access to every component thus
easing repair work.
The power supply features a PI filter after the rectifying stage which attenuates spurious
components.
Two fuses provide overload protection.
The power supply comprises three separate transformers: the largest supplies the tube anode,
a toroidal transformer supplies the tube's filament (this is found towards the rear of the RF
chamber) and lastly an auxiliary supplies various functions such as relays and the protection
system.
This power supply is designed to work at single phase voltages (three phase is available on
request).
5.3 Protection Card
This card is mounted in a metal box and fixed to the right-hand side of the RF chambers
chassis (5 Photo 2). This sub-unit has three alarm inputs which carry the signal to a comparator
which compares them to a pre-defined threshold. Should one of these inputs exceed the
alarm threshold, the amplifier is disactivated and a counter is started.
If the fault condition does not dissappear within the period defined by the counter, the unit is
shut down indefinately.
5.4 Tube
The ceramic/metal power triode 3CX800A7 has been designed to work in AB2class
amplifiers, in class B cathode-driven amplifiers, in audio or RF applications including the
VHF band, or in class C cathode-driven, anode-modulated RF amplifiers.
As linear amplifiers, they feature high power gain with low levels of intermodulation.
For the tube specification, see Table C.

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11 / 44USER MANUAL Rev. 4.0 - 26/02/01
TABLEC
TUBESPECIFICATIONS
Model 3CX500A7
AnodeDissapation 1500W approx.
GridDissapation: 25W approx.
MaxFrequency 250 MHz
CoolingSystem: Forcedventilation
FilamentVoltage 5.0V
Filament Current 10.5A
CapacitancewithGroundedCathode Input: 38.5 pF
Output: 0.1 pF
Input/Output: 10.2 pF
CapacitancewithGroundedGrid Input: 38.5 pF
Output: 10.2 pF
Input/Output: 0.1 pF
AmplificationFactor 200
Transconductance 55.000µmhos
RecommendedSockectforGrounded SK2210
GridOperation
RecommendedSockectforGrounded SK2200
ChatodeOperation
RecommendedFlue SK2216
Maximum Anode and Seal Core Temperature 250°C
Maximum Length: 102.2mm(4.02")
Maximum Diameter: 85.80mm(3.38")
Weight 0.7Kg (1.6oz)
OperationalPosition Any

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12 / 44 USER MANUALRev. 4.0 - 26/02/01
TABLED
BLOWERTECHNICALSPECIFICATIONS
Model Type G2E180-AA03-01
Voltage 220V
Frequency 50-60Hz
AirVolume 535m3/h
Speed 2450min-1
Input 300W
CurrentConsumption 1.38A
Capacitor 8µF
NoiseLevel 66dBA
Type of enclosure IP44
WeightApprox. 5.4Kg

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FRONTPANELVIEWDESCRIPTION(FIG.1)
1 R.F.TEST-60dB -60dB with respect to the output level.
2 OUTPUT POWER Analog meter for the measurement of
direct and reflected output power.
3 DIR/REF Switch for the selection of direct or
reflected power measurement.
4 CURRENTS Analog meter for the measurement of
anode and grid currents.
5 GRID/PLATE Switch for the selection of grid or
anode current measurement.
6 VOLTMETER Analog meter for the measurement of
plate and heater voltages
7 HEATER/PLATE Switch for the selection of heater or
plate voltage measurement.
8 TUNING Motorized tuning switch.
9 LED "-" (87.5) Led to indicate that tuning has reached
end of range at 87.5 MHz.
Off signifies end of range.
10 LED "+" (108) Led to indicate that tuning has reached
end of range at 108 MHz.
Off signifies end of range.
11 PLATE Anode tuning switch.
12 LOAD Load matching control.
13 V.S.W.R. Indicator showing excess V.S.W.R.
14 I.G. Alarm indicator for excess grid current.
15 PRESS. Indicator showing insufficient fan
pressure.
16 H.T. Indicator showing high voltage active.
17 ON Power indicator.
18 POWER Power on/off switch.
19 ST.BY. Standby switch.
20 HOURSMETER Hour counter showing the total number of
hours that the unit has been
operational.

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21 AIRFILTER Air filter for power supply.
22 HT PANEL Internal access to RF chamber.
23 RESTART Alarms Reset (only in the version with telemetry
option)
24 ALARMS CARD ON Alarms Card On (only in the version with telemetry
option)