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R.V.R. Elettronica PJ300M User Manual

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PJ300M
User Manual
Volume 1
Manufactured by
Italy

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Summary of Contents for R.V.R. Elettronica PJ300M

  • Page 1 PJ300M User Manual Volume 1 Manufactured by Italy...
  • Page 2 Reason Editor 05/09/01 First Version D. Canazza 25/07/03 Reduced Version J. Berti PJ300M - User Manual Versione 7.0 © Copyright 1993 - 2003 R.V.R. Elettronica SpA Via del Fonditore 2/2c - 40138 - Bologna (Italia) Telefono: +39 051 6010506 Fax:...
  • Page 3 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.
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  • Page 5: Table Of Contents

    PJ300M Table of Content 1. Preliminary instructions 2. Warranty 3. First Aid 3.1 Treatment of electrical shocks 3.2 Treatment of electrical Burns 4. General Description 5. Installation and Use 5.1 Preparation 5.2 Operation 5.3 Protection System 6. External Description 6.1 Front Panel 6.2 Rear Panel...
  • Page 6 PJ300M This page was intentionally left blank Rev. 7.0 - 25/07/03 User Manual...

  • Page 7: Preliminary Instructions

    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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  • Page 9: Warranty

    PJ300M 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.
  • Page 10 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.

  • Page 11: First Aid

    PJ300M 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 •...

  • Page 12: Treatment Of Electrical Burns

    PJ300M 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...

  • Page 13: General Description

    PJ300M 4. General Description RVR Elettronica’s PJ300M is a 19” rack-mountable, 3 HE high, solid-state broadband power amplifier for FM audio broadcasting. It works without adjustment on the whole 87.5 - 108 MHz FM band and its power output is 300 W nominal with a drive level of about 10W.
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  • Page 15: Installation And Use

    PJ300M 5. Installation and Use This chapter is intended to summarize the necessary points for the installation of the device. In case any of the topics herein are unclear, for example when you use the amplifier for the first time, please read carefully the whole manual.

  • Page 16: Operation

    PJ300M Link one of the Alarms/Interlock connectors to the Interlock connector of the exciter, if available (as it is in RVR Elettronica’s exciters). If the exciter you are going to use has no suitable interlock connector, it is advisable to use for its supply the plug called “AC Line for exciter”...

  • Page 17: Protection System

    PJ300M 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 considered normal.
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  • Page 19: External Description

    PJ300M 6. External Description This chapter describes the front and rear panels of the PJ300M, with a brief indication of all the different components. 6.1 Front Panel [1] Ext. St. By External Standby LED indicator [2] On Indicates when the aplifier is switched ON...

  • Page 20: Rear Panel

    PJ300M 6.2 Rear Panel [1] Fan Fan for forced ventilation [2] R.F. Test -60 dB RF sample, -60 dB with respect to the output level [3] Telemetry Connector Connector for remote measurement of working parameters [4] R.F. Input RF input connector (“N” type) [5] R.F.

  • Page 21: Connectors Description

    PJ300M 6.3 Connectors Description 6.3.1 Telemetry Connector Type: DB25 Female R.F. Module’s Voltage 2.0V X 50V R.F. Module’s Voltage 2.0V X 10A Reflected power 1.6 V X 40 W Inhibitor TX 12 V Internal SWR 15 V -> fault Operate...
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  • Page 23: Technical Specifications

    PJ300M 7. Technical Specifications 7.1 Dimensional and Environmental Specifications Cabinet Dimensions 340.0 mm (13,39”) x 126.0 mm (04,96”) x 437.0 mm (17,20”) Panel dimensions 483 mm (19”) x 132,5 mm (05,22”) Weight 20 Kg -10 °C ÷ 50 °C Operating temperature range...
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  • Page 25: Theory Of Operation

    PJ300M 8. Theory of Operation The figure 8.1 shows the block diagram of PJ300M. The blocks are described in the present chapter: Figure 8.1 8.1 Power supply section The power supply section of the PJ300M is composed by the mains transformer, the soft start card and the switching mode power supply.

  • Page 26: Power Amplifier

    PJ300M 8.2 R.F. Power Amplifier The RF power amplifier section is composed of a single power module hosted in a shielded enclosure of the amplifier. The module is mounted on a heat sink that allows its cooling through forced ventilation.

  • Page 27: Identification And Access To Modules

    PJ300M 9. Identification and Access to Modules 9.1 Modules Identification (top view) [1] Low pass filter [2] Switching mode power supply (PSSW5010) [3] Alarms card [4] RF power amplifier module [5] Transformer [6] Soft start card User Manual Rev. 7.0 - 25/07/03...

  • Page 28: Ordinary Maintenance

    PJ300M 9.2 Ordinary Maintenance The only regular maintenance needed by the PJ300M, is the periodic substitution of the blowers, and the cleaning of dust filters (if installed) and any dust accumulated inside the amplifier. The time between overhauling of the blowers depends upon the environmental factors like temperature, humidity, dust pollution etc.
  • Page 29 PJ300M • Disconnect the RF module connectors CN1, J1 and J2 • Remove the air filter of the RF module from the front panel • Unscrew two screws securing the heat sink of the RF module to the front panel •...
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  • Page 31: Internal Adjustment

    • Connect CN1 (coming from power supply) to the RF module. • Connect the input connector J1 to PJ300M RF input connector and the output J2 to the input connector J1 of low pass filter. • See setup shown in figure, that comprises a dummy load (P>300W at 50 Ohm) with a wattmeter in series, to verify the delivered power of the amplifier.

  • Page 32: Alarms Card Adjustment

    NOTE: Make sure that this replacement is really necessary. • After changing the board, connect the amplifier as shown in the figure. • Switch on the PJ300M • Pot the measurement selector on position “V” • Adjust the trimmer R14 on the alarms card to have a reading of 50V (make shure the voltage of the power supply is really 50V) •...

  • Page 33: Soft-Start Adjustment

    Increase the output power to obtain a reading of 40W of reflected power on the external wattmeter. Now adjust the trimmer R13 on the alarms card to obtain the same reading on the PJ300M meter. • Move R40 on the alarms card and check the LED SWR INT is lit. Now measure the voltage on pin 13 of U1 and adjust R40 to have 1.6V.

  • Page 34: Low Pass Filter Adjustment

    Connect one of the two connectors alarms/interlock of the amplifier to the appropriate connector of the exciter. • Switch on the amplifier PJ300M and the exciter and wait for the exciter to lock on the working frequency. • Slowly increase the drive power to obtain 325W of otuput power.

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