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Elenos SF 300 Handbook

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SF300
BROADCAST EQUIPMENT COMPANY

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  • Page 1 SF300 BROADCAST EQUIPMENT COMPANY...
  • Page 2 Handbook SF 300 - The manufacturer reserves the right to change at any time this handbook without the condition to advise that the version has been updated. 1997 Elenos S.r.l. Printed in Italy 21/10/1996 rev. 0 Preliminary 10/04/1997 rev.1 04/01/98 rev. 1.1 Via G.
  • Page 3 Handbook SF 300 - INDEX BOTTOM VIEW · 24 MANUFACTURER'S RECOMMENDATIONS · 9 E20147 (Power Supply Board) · 35 POWER SUPPLY and MEASUREMENT BLOCK E30501 (protection board) · 41 DIAGRAM · 26 E30502. (Front Panel board) · 46 PRECAUTIONS · 8 E40101 (back board) ·...

  • Page 4: General Description

    Handbook SF 300 - GENERAL DESCRIPTION The SF300 model is a solid state amplifier without variable tuning circuits for the 87.5 to 108 MHz frequency band, intended as a supplementary power stage for FM modulators. The unit is designed to operate as a final stage powering a radiating system, or as an intermediate stage in a chain of amplifiers, thus loaded by the input stage of a following amplifier.

  • Page 5: Front View

    Handbook SF 300 - FRONT VIEW Technical Office TEL: +39 532 829 965 FAX: +39 532 829 177...

  • Page 6: Rear View

    Handbook SF 300 - REAR VIEW Technical office TEL: +39 532 829 965 FAX: +39 532 829 177...

  • Page 7: Technical Features

    Handbook SF 300 - TECHNICAL FEATURES Max. power output: 300W Max. power for 300W output: from 5W to 12W Mosfet efficiency at 300W output: from 52% to 68% Mosfet voltage: from 22V to 48V DC Mosfet rest current: from 5mA to 25mA Mosfet current at 300W: from 8A to 10A Input SWR: less than 1.6W...
  • Page 8 Handbook SF 300 - PRECAUTIONS Do not handle the unit in any way unless all its protection panels are completely closed and it is connected to a good earth which can ground parasitic currents circulating in the chassis. Of the Do not operate the unit unless all its panels are completely closed.

  • Page 9: Manufacturer's Recommendations

    Handbook SF 300 - MANUFACTURER'S RECOMMENDATIONS The installation of any electronic apparatus exposes personnel to risk; ELENOS explcitly requests that no work is carried out unless at least two people are present. This is in view of the fact that over and above the electrical connections that are necessary, the sheer physical weight of the unit will not allow a single person to install the unit with complete safety.

  • Page 10: Technical Description

    Handbook SF 300 - TECHNICAL DESCRIPTION The SF300 is a solid state amplifier using MOSFET power devices as the active radio frequency element. The equipment comprises 2 RF amplifier modules (card EF150FM1) which are matched for input/output impedance of 50Ω, an input divider circuit (card ESPL06) and a low-pass filter (card LPF501FM) which is also a low-pass filter and an output power measurement circuit.

  • Page 11: User Interface

    Handbook SF 300 - USER INTERFACE All the controls and indications of the status of the unit needed by the operator are situated on the front panel. The unit does not have a power on/off switch but rather a STAND BY switch. This switch is situated on the lower left of the panel;...
  • Page 12 Handbook SF 300 - panel; these should be lit whenever the unit is powered from the line supply. The R.F. MONITOR socket provides a sample of the power output of the unit, attenuated by 40-50 dB, for connection to a spectrum analyser and can be used to check correct operation of the apparatus and any anomalies present in the radio spectrum.

  • Page 13: Remote Interface

    Handbook SF 300 - REMOTE INTERFACE At the rear of the unit, a CANNON DB25F connector is situated, labelled REMOTE. This connector allows remote devices to control various operational parameters of the unit and to activate various operations even via automatic controllers such as timers, interlocks and other similar electronic or electromechanical devices.
  • Page 14 Handbook SF 300 - Pin #23 (F. PWR.). Signal representing the units RF power output, normalised at 2 Volts f.s.d. on front panel meter. Pin #24 (-12V). Internal -12V voltage indicator. Pin #25 (+12V). Internal +12V voltage indicator. Technical office TEL: +39 532 829 965 FAX: +39 532 829 177...

  • Page 15: Installation

    In the case of any evident damage, contact ELENOS, for return under warranty. All the technical manuals supplied with each unit which make up the system being installed should be read to ensure that the conditions of guarantee are complied with and, most importantly, that any danger to personnel is avoided.
  • Page 16 Handbook SF 300 - captive screw. This allows a low-resistance path to earth for atmospheric electrostatic discharges and may also be used for special connection configurations. When all the equipment is connected and all panels are closed, the units can be switched on in the following sequence: first the final stage the whole transmitter system, then the intermediate stages and finally the modulator.

  • Page 17: Front Panel Diagnostics

    Handbook SF 300 - FRONT PANEL DIAGNOSTICS A) Diagnostic with selector in VOLTAGE position When the selector is in the VOLTAGE position, it is possible to obtain useful diagnostic data from the COUNT alphanumeric display. This display shows a 2 character code which identifies the functional status of the unit.
  • Page 18 Handbook SF 300 - for 7 seconds before trying again. If 2 of these events occur consecutively, the amplifier will shut down for 9 seconds clear the event counter (CURRENT) and again attempt an automatic reset. The LOCK and VOLTAGE indicator will also appear on the front panel.. If, instead, this message appears only once, the fault is not permanent and is considered as an isolated incident and consequently ignored by the protection logic.
  • Page 19 Handbook SF 300 - consecutively, the unit will shut down for 9 seconds then, clear the event counter (TEMP) and again attempt an automatic reset. If, instead, this message appears only once, the fault is not permanent and is considered as an isolated incident and consequently ignored by the protection logic Check if the ambient temperature is occasionally exceeding specified values.
  • Page 20 Handbook SF 300 - S: indicates that the amplifier is in STAND BY mode as a result of operator intervention or control by external equipment. P: Indicates that the unit is ready to generate RF power. L: Indicates faulty connection or operating sequence. Confirmed by the Ab message.

  • Page 21: Troubleshooting

    RF output power or to repair the circuits in question (consult ELENOS for necessary assistance). The reduced power output can be caused by a fault in one of the RF amplifier modules, or, less frequently, in other parts.
  • Page 22 Handbook SF 300 - modulator but being reflected by the SF300. Even successive stages can cause power instability; this can occur if the load presented to the unit is unstable or there is a high content of harmonic or spurious radio frequencies. Check the harmonic and out-of-band content of the RF present between the SF300 and successive equipment.

  • Page 23: Top View

    Handbook SF 300 - TOP VIEW Technical Office TEL: +39 532 829 965 FAX: +39 532 829 177...

  • Page 24: Bottom View

    Handbook SF 300 - BOTTOM VIEW Technical office TEL: +39 532 829 965 FAX: +39 532 829 177...

  • Page 25: Block Diagram

    Handbook SF 300 - R.F. BLOCK DIAGRAM Part List of R.F. Block Diagram Rif. Description Value Remarks ESPL06.0 Splitter input and power measurement board EF150FM.1 Power amplifier board LPF501FM Low pass filter board SC1, SC2 Cable type RG178 50 ohm...
  • Page 26 Handbook SF 300 - POWER SUPPLY and MEASUREMENT BLOCK DIAGRAM Technical office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 27 Handbook SF 300 - PART LIST OF POWER SUPPLY AND MEASUREMENT BLOCK DIAGRAM Rif. Description Value Remarks Elenos Code BLOWER 1, Blower 120x120 30W BLOWER 2 4700 µF C1,C2 Electrolytic capacitor E20147-4 Power supply board E30501-2N Protection board E30502 Front panel board...
  • Page 28 Handbook SF 300 - ESPL02.1 (Splitter input Board) Part List of ESPL02.1 Board Rif. Description Value Remarks Elenos Code Print Board 2PCB0210 R1, R2 Resistor 34 KΩ 100 Ω Resistor Trimmer type 67W 50 KΩ C1, C2 Ceramic Capacitor 10 pF...
  • Page 29 Handbook SF 300 - Technical Office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 30 Handbook SF 300 - EF150FM.1 (Power Amplifier) Technical office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 31 Handbook SF 300 - PART LIST BOARD EF150FM1 Rif. Description Value Remarks Elenos Code 2PCB0190 100 Ω R1, R2 Resistor 0.5 W 5% 820 Ω Resistor 0.25 W 5% 10 Ω Resistor 2 W 5% Resistor 0.25 W 5% 15 KΩ...
  • Page 32 Handbook SF 300 - LPF501FM (Low Pass Filter) Technical office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 33 Handbook SF 300 - Technical Office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 34 Handbook SF 300 - PART LIST BOARD LPF501FM Rif. Description Value Remarks Elenos Code Board LPF501FM 2PCB0225 220 Ω R2, R6 CHIP Resistor S.1206 270 Ω CHIP Resistor S.1206 CHIP Resistor S.1206 3.3 KΩ 100 Ω CHIP Resistor S.1206 47 Ω...
  • Page 35 Handbook SF 300 - E20147 (Power Supply Board) Technical Office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 36 Handbook SF 300 - Technical office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 37 Handbook SF 300 - Technical Office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 38 Handbook SF 300 - Part List Board E20147 Item Description Value Remarks PCB1 Board code 2PCB0224 PCB2 Board code 2PCB0221 330 Ω Resistor 1/4W 5% Resistor 1/4W 1% 4.7 KΩ Resistor 1/4W 1% 10 KΩ 47 Ω Resistor Resistor 10 KΩ...
  • Page 39 Handbook SF 300 - 0.12 Ω SHUNT SF150 Resistor 5W 1% 0.04 Ω SHUNT Resistor 5W 1% SF250, SF300 0.02 Ω SHUNT SF400 Resistor 5W 1% 0.02 Ω SHUNT Resistor 5W 1% SF500, HF1000 500 Ω Trimmer Vert. Mult. Type 67W...
  • Page 40 Handbook SF 300 - ST62T10B6/HWD + Socket 20 pin MOC072C + Socket 8 pin Opto TLP3021 + Socket 6 pin Opto TLP630 + Socket 6 pin ANSLEY connector 2 x 10p -CAP Fixing stud F/M 15mm. M3 Fixing stud F/M 15mm. M3 54 V.A.C.
  • Page 41 Handbook SF 300 - E30501.2N (Protection board) Technical Office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 42 Handbook SF 300 - Technical office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 43 Handbook SF 300 - Technical Office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 44 Handbook SF 300 - Part List Board E30501.2N Rif. Description Value Remarks Board code 2PCB0206 R1, R2 Resistor ¼ W 1% 10 KΩ R4, R5 Resistor ¼ W 1% 34 KΩ Resistor ¼ W 1% 10 KΩ Resistor 2.2 KΩ...
  • Page 45 Handbook SF 300 - Electrolytic. Vert. Capacitor 63 V 10µF C39, C40, C41 Electrolytic. Vert. Capacitor 100uF 35 V C42, C43, C44, Ceramic Capacitor 100 nF 63 V C45, C46, C47 Ceramic Capacitor 4.7 nF 50 V C49, C50 Ceramic Capacitor...
  • Page 46 Handbook SF 300 - E30502 (Front panel board) Technical office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 47 Handbook SF 300 - Technical Office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 48 Handbook SF 300 - Part List Board E30502 Rif. Description Value Remarks Board Code 2PCB0207 Resistor 1/4W 1% 10 KΩ 0 Ω Copper Wire R3, R4 Resistor 1/4W 1% 10 KΩ Resistor 1/4W 5% 1.8 KΩ R7, R8 Resistor 1/4W 1% 1 KΩ...
  • Page 49 Handbook SF 300 - E40101 (back board) Technical Office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 50 Handbook SF 300 - Technical office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 51 Handbook SF 300 - PART LIST BOARD E40101 Rif. Description Value Remarks Board code 2PCB0231 150 Ω Resistor 47 Ω R2, R2A Resistor Resistor 1/4W 1% 1 KΩ Resistor 1/4W 1% 10 KΩ Resistor 1/4W 5% 470 Ω R6, R7...
  • Page 52 Handbook SF 300 - E40500 (connection board) Technical office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 53 Handbook SF 300 - Technical Office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 54 Handbook SF 300 - PART LIST BOARD E40500 Rif. Description Value Remarks Board code 2PCB0233 R1, R2 Resistor 1/4W 1% 100Ω Trimmer type 89P 100KΩ Ceramic Capacitor 100 nF 63 V Diode type 1N4148 ANSLEY connector 20+20 pin Straight ANSLEY connector 10+10 pin Straight...
  • Page 55 Handbook SF 300 - SF000070 - Thermal Probe Part List of Thermal Probe Board Rif. Description Value Remarks Board Code 2PCB0208 R1, R2 Resistor 6980Ω 1/4W C1, C2 Ceramic Capacitor 4700 pF 10 µF Electrolytic. Capacitor 63 V Sensor type LM35DH...
  • Page 56 Handbook SF 300 - EPCB0200 (Clock Buffer Board) Part List Board EPCB0200 Rif. Description Value Remarks Board Code 2PCB0200 I.C. type DM7400N Technical office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 57 Handbook SF 300 - EPCB0240 ( R.F.I. Protection Board) Part List Board EPCB0240 Rif. Description Value Remarks Board Code 2PCB0240 C1 - C15 SMD Capacitor 4.7 nF CN1, CN2 Strip step 2.54 1 x 10 p Technical Office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 58 Handbook SF 300 - EPCB0239 (Watch-Dog Board) Technical office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 59 Handbook SF 300 - Technical Office TEL: +39 532 829 965 FAX: +39 532 829 177...
  • Page 60 Handbook SF 300 - PART LIST BOARD EPCB0239 Rif. Description Value Remarks Board Code 2PCB0239 Resistor 100 KΩ Resistor 1 KΩ Resistor 10 KΩ Resistor 1 KΩ R5, R6 Resistor 10 KΩ Resistor 100 KΩ Resistor 10 KΩ C1, C2, C3, C4,...

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