P9CFM-250250W FM Stereo Transmitter

FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 250W STEREO TRANSMITTER/EXCITER TECHNICAL MANUAL LARCAN Denver Office (LARCAN-TTC) 1390 Overlook Drive #2, Lafayette, CO 80026 USA Tel: 303-665-8000 Fax: 303-763-9900 E-Mail: [email protected] Web: www.larcan.com FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 NOTE AMENDMENT Please take note that any reference to 230V and 50Hz in this manual should be read as 110V and 60Hz respectively. FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 250W STEREO TRANSMITTER/EXCITER TECHNICAL MANUAL CONTENTS: 1. General Description 2. Technical Specifications 3. Operating Information 4. Installation Information 5. Technical Information 6. Maintenance information LARCAN Denver Office (LARCAN-TTC) 1390 Overlook Drive #2, Lafayette, CO 80026 USA Tel: 303-665-8000 Fax: 303-763-9900 E-Mail: [email protected] Web: www.larcan.com FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 INTRODUCTION This manual contains the operating, technical and installation information for the NCI FM-250 FM Broadcasting Exciter. The Exciter forms part of a new range of Professional FM Broadcast Exciters produced by Broadcast Solutions Electronics (Pty) Ltd and supplied by LARCAN USA in the United States. 1. The FM-250 Exciter forms a compact, solid state FM Broadcast transmitter with a RF output in excess of 250W in the FM Broadcasting band (87.5MHz to 108MHz). The unit is housed in a 19-inch rack mount case occupying only a 2U space. The Exciter features a range of customer options including a built in, high quality Stereo coder. 2. The FM-250 Exciter offers a standard specification, better than the general requirements of the major broadcasters in the world. This level of performance is only found in the best equipment that the market has to offer. 3. The following basic versions are available: a) FM-250 (W) Wideband MPX Exciter (For use with composite input). b) FM-250 (S) Stereo Exciter (With built in Stereo coder and Audio Limiter). c) FM-250 (M) Mono Exciter (With built in Mono input filter and Audio Limiter). FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 250W STEREO TRANSMITTER/EXCITER TECHNICAL MANUAL General Description LARCAN Denver Office (LARCAN-TTC) 1390 Overlook Drive #2, Lafayette, CO 80026 USA Tel: 303-665-8000 Fax: 303-763-9900 E-Mail: [email protected] Web: www.larcan.com FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 GENERAL DESCRIPTION 1. STRUCTURE. The Exciter comprises of the following modules. a) Synthesizer/Modulator module (980507). b) Control/Monitoring module (980508). c) 250W RF PA module (980510). d) 250W Power supply module (980515). e) Display module (980509). f) Stereo coder/Limiter (980512). (Optional). g) Fan Psu module (980518). 2. FEATURES. The FM-250 Exciter has standard features including the following; a) Remote/Internal frequency selection (standard) with Thumbwheel switch option available. b) Remote telemetry with voltage free contacts (standard). c) +48V Battery operation (standard). d) Wideband input (MPX) with two auxiliary inputs (SST/SCA/RDS). e) Comprehensive metering including VU meters. (Built in Stereo decoder). f) ALC built in for absolute control of RF output power. g) Comprehensive protection built in. 3. BLOCK DIAGRAM DESCRIPTION. FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 Refer to the Front panel layout in figure 1, Rear panel controls and connectors in figure2 and the Block diagram of FM-250 in Figure 3 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 Figure 1: FM-250 Front Panel Controls FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 Figure 2: FM-250 Rear Panel Controls and Connectors FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 Figure 3: Block diagram of FM-250 STEREO CODER 980512 OV OV LEFT (XLR) RIGHT (XLR) PRE-EMPH (SWITCH) SYNTHESISER 980507 OV MPX (I/P) OV AUX 1 (I/P) OV AUX2 (I/P) SYNTH REMOTE (D-15) PL1 PL2 PL3 SK2 SK3 SK4 PL2 MPX OUT RF P.A. 250W 980510 OV RF OUT (N TYPE) RF OUT SK1 CONTROL PCB 980508 BACK PANEL INPUTS OV PILOT OUT (BNC) REAR PANEL SK1 PL4 10 way ribbon cable PL4 REMOTE TELEMETRY REAR PANEL (D-25) PL7 DEVIATION ADJ. (OPTIONAL) PL3 PSU PL4 PL5 THUMBWHEEL (OPTION) PSU PCB 980508 PL1 OV SK1 ALC TEMP CNTRL FWD REFL PL3PL1PL2SK1SK2 PL1 PL2 PL3 DISPLAY PCB 980509 26 way ribbon cable PL6 20 LED MULTIMETER STEREO VU METER PILOT INDICATOR FAULT INDICATORS FUNCTIONAL INDICATORS DEVIATION ADJ. (OPTIONAL) RF POWER ADJ. RS485 (OPTIONAL) REAR PANEL PL1 PL8 500VA TRANSFORMER RF MONITOR FRONT PANEL (BNC) OV 230V 50Hz (IEC INPUT) E N L 0V +48V O/P AUX. VOLTS +24V AC +48V AC 230V 50Hz FRONT PANEL POWER SWITCH SK1/1 25A BRIDGE PL4 PL1 + ~ ~ SK1 AUX PSUMAIN PSU 8A 10A D.C. INPUT SK4SK1/3 PL3 FAN PL2 250W STEREO EXCITER BLOCK SCHEMATIC 25A BRIDGE FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 a) SYNTHESIZER AND MODULATOR (980507) The digital synthesizer derives the final operating frequency from a 10MHz reference (TCXO) using a PLL (Phase lock loop) and dividers. The frequency can be selected Locally (In 100kHz steps via rotary BCD switches) or Remotely (via a external parallel control). The direct carrier modulator uses special techniques to obtain very low distortion and high stereo channel separation (>60dB). This level of performance is not normally found on competitive equipment, especially at low audio frequencies. The Synthesizer is equipped with four modulating inputs, three of which are external (BNC's) and one internal (SMB) for use with optional Stereo coder. The synthesizer is protected from Out of Lock and Out of Band operation by removing the RF Output when either of these conditions exists. b) RF PA MODULE (980510) The RF output (Nominally +10dBm) from the synthesizer buffer is amplified by a three stage RF power amplifier to obtain the fi…

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P9CFM-250 250W STEREO TRANSMITTER/EXCITER TECHNICAL DATA FOR FCC CERTIFICATION Attestation Statement

P9CFM-250 250W STEREO TRANSMITTER/EXCITER TECHNICAL DATA FOR FCC CERTIFICATION Cover Letter

P9CFM-250 250W STEREO TRANSMITTER/EXCITER TECHNICAL DATA FOR FCC CERTIFICATION External Photo External Photograph of FM-250 250W Stereo Transmitter

P9C FM-250 250W STEREO TRANSMITTER/EXCITER TECHNICAL DATA FOR FCC CERTIFICATION Internal Photo Internal view of the FM-250 250W Stereo Transmitter

P9CFM-250 250W STEREO TRANSMITTER/EXCITER TECHNICAL DATA FOR FCC CERTIFICATION General Description GENERAL DESCRIPTION The Exciter forms part of a new range of Professional FM Broadcast Exciters produced by Broadcast Solutions Electronics (Pty) Ltd. 1. The FM-250 Exciter forms a compact, solid state FM Broadcast transmitter with a RF output in excess of 250W in the FM Broadcasting band (87.5MHz to 108MHz). The unit is housed in a 19-inch rack mount case occupying only a 2U space. The Exciter features a range of customer options including a built in, high quality Stereo coder. 2. The FM-250 Exciter offers a standard specification, better than the general requirements of the major broadcasters in the world. This level of performance is only found in the best equipment that the market has to offer. 3. The following basic versions are available: a) FM-250 (W) Wideband MPX Exciter (For use with composite input). b) FM-250 (S) Stereo Exciter (With built in Stereo coder and Audio Limiter). c) FM-250 (M) Mono Exciter (With built in Mono input filter and Audio Limiter). 4. STRUCTURE. The Exciter comprises of the following modules. a) Synthesizer/Modulator module (980507). b) Control/Monitoring module (980508). c) 250W RF PA module (980510). d) 250W Power supply module (980515). e) Display module (980509). f) Stereo coder/Limiter (980512). (Optional). g) Fan Psu module (980518). 5. FEATURES. FM-250 FM BROADCASTING EXCITER 862-90003 The FM-250 Exciter has standard features including the following: a) Remote/Internal frequency selection (standard) with Thumbwheel switch option available. b) Remote telemetry with voltage free contacts (standard). c) +48V Battery operation (standard). d) Wideband input (MPX) with two auxiliary inputs (SST/SCA/RDS). e) Comprehensive metering including VU meters. (Built in Stereo decoder). f) ALC built in for absolute control of RF output power. g) Comprehensive protection built in. 6. BLOCK DIAGRAM DESCRIPTION. Refer to the Front panel layout in figure 1, Rear panel controls and connectors in figure2 and the Block diagram of FM-250 in Figure 3 Figure 1: FM-250 Front Panel Controls FM-250 FM BROADCASTING EXCITER 862-90003 Figure 2: FM-250 Rear Panel Controls and Connectors

P9CFM-250 Technical Data for FCC Certification Active Devices and Function List Stereo Coder PCB #654-Z0001 DEVICETYPEFUNCTION PMLL4148DiodeSmall Signal Switching BYV27-200Diode200V Fast Recovery 1N4004DiodeRectifier PN2222ATransistorSmall Signal PN2907ATransistorSmall Signal 79L05IC-5V Regulator 78L05IC+5V Regulator 78L12IC+12V Regulator LM2575-HVTICStep-down Voltage Regulator LM339NICQuad Comparator 74HC04NICHex Inverter 74HC74NICDual Positive Edge Trigger 74HC4002NICDual 4 I/P NOR Gate 74HC4520EIC4-Bit Binary Counter 74HC4015EICShift Regulator 74HC4316NICQuad Analog Switcher 74HC32NICQuad 2 I/P OR Gate LF353NICDual Op Amp TL071CPICSingle Op Amp NE571NICComparator/Limiter Crystal4.256MHz Power Amplifier PCB #654-Z0029 DEVICETYPEFUNCTION PMLL4148DiodeSmall Signal Switching BYV28-200Diode200V Fast Recovery Rectifier MRF136YTransistor30W MOSFET MRF134Transistor5W MOSFET LM2576TICAdj Voltage Switching Regulator MAV11ICRF Amplifier P9CFM-250 Technical Data for FCC Certification Active Devices and Function List Synthesizer PCB #980507A1 DEVICETYPEFUNCTION BB405BDiodeVariable Capacitance 1N4004DiodeRectifier PMLL4148DiodeSmall Signal Switching BB809DiodeVariable Capacitance BF245BTransistorSmall Signal JFET BC550CTransistorSmall Signal PN2222ATransistorSmall Signal PN2907ATransistorSmall Signal 74HC32NICQuad 2 I/P OR Gate 74HC08NICQuad 2 I/P AND Gate 74HC132NICQuad 2 I/P Schmitt Trigger 74HC4059NICProgrammable Counter 74HC4075EICTriple 3 I/P OR Gate 74HC7046ANICPLL 7815IC+15V Regulator 7805IC+5V Regulator TL072CPICDual Op Amp U893BSEICPre-scaler MSA0866ICRF Amplifier Crystal10MHz TCXO Control PCB #980508A1 DEVICETYPEFUNCTION BAT83/85DiodeSchottky Rectifier 1N4148DiodeSmall Signal Switching 1N4004DiodeRectifier PMLL4148DiodeSmall Signal Switching BVY27-200Diode200V Fast Recovery BVY10-60Diode60V Fast Recovery PN2222ATransistorSmall Signal PN2907ATransistorSmall Signal 2N5551TransistorHV Amplifier P9CFM-250 Technical Data for FCC Certification Active Devices and Function List Control PCB #980508A1 (cont'd) DEVICETYPEFUNCTION 7812IC+12V Regulator LM358MICDual Op Amp LM2575-HVTICStep-down Voltage Regulator 79L12IC-12V Regulator TL064CNICQuad Op Amp TL072CPICDual Op Amp Front Panel PCB #989892A1 DEVICETYPEFUNCTION BAT83/85DiodeSchottky Rectifier PMLL4148DiodeSmall Signal Switching PN2222ATransistorSmall Signal 74HC4052NIC4 Channel Analog Multiplier 4510BEICBCD Counter 7812IC+12V Regulator LM3914ICLinear Bargraph Display Driver LM3916ICVU Display Driver TL064CNICQuad Op Amp TDA1591V3ICStereo Decoder 78L05IC+5V Regulator --------------------------------------------------------------------------- DOCUMENT No. 862-Z0125 FACTORY SET-UP TEST SPECIFICATION FOR 250W FM EXCITER FM-250 ISSUE STATE This Issue consists of the following Pages: Page No. Issue Page No. Issue Page No. Issue Issue 1 2 3 Date Change Note Issue Date Change Note ©2002 BROADCAST SOLUTIONS ELECTRONICS (PTY) LTD – This document must not be used for any purpose other than that for which it is supplied. --------------------------------------------------------------------------- FM–250 PTS 1 PART 1 : INTRODUCTION The objective of this specification is to outline the electrical tests required for the production testing of the FM-250 FM Exciter. 2 PART 2 : PRODUCTION TEST REQUIREMENTS 2.1 General This section details the tests to be carried out on the Exciter Unit. Correct anti-static handling procedures are to be followed when handling PCBs. 2.2 Test Equipment A. Oscilloscope 100MHz B. Digital Multimeter (DMM) C. Frequency counter HP 5384A or similar D. RF Power Meter E. Bird RF Attenuator 500 W, 20 dB F. R & S Modulation Analyzer FAM/FMAB G. R & S Audio Analyzer UPA 3 H. R & S Stereo Encoder MSC 2 J. HP Spectrum Analyzer 8590B or similar K. Exciter test L. PSU 0-60 V, 10A M. Mismatched load N. R & S Stereo Decoder MSDC 2 O. Remote Frequency Selection Test Box Connect Exciter under test to the test equipment as shown in Figure 1. The DC Power Supply should be adjusted to +52 V ± 0,1 V with the current limit set to 1 A. --------------------------------------------------------------------------- 2.3 Preparation 2.3.1 Mechanical and Visual Inspection Carry out mechanical and visual inspection as follows: 1. Check the connectors for looseness and alignment 2. Visually inspect the components and their spacing from the PCB 3. Record results in the Test Result Sheet (TRS). 2.3.2 Electrical Testing Initialisation 1. Adjust preset pot (PWR ADJ) on UUT front panel fully counter- clockwise. 2. Set synth frequency to 88 MHz using internal switches on synthesiser PCB. 3. Ensure RF ENABLE switch is OFF on test jig. 2.4 RF Power/Frequency/Spectrum Figure 1. Test Setup --------------------------------------------------------------------------- 2.4.1 Switch ON Sequence a. Switch Exciter ON/OFF switch to ON and ensure the following: The PLL LOCK LED, EXT DC and Remote PLL is ON after approximately three seconds. The RF ENABLE and RF FAULT LEDs are OFF. Record results in TRS. 2.4.2. a. Set current limit on DC power supply to 10 A. b. Select RF ENABLE on test jig. c. Observing the front panel of Exciter unit, ensure RF ENABLE LED is ON. d. Ensure RF power output on Wattmeter is <5 W. e. Record result in TRS. 2.4.3. a. Set up spectrum analyser as follows: Centre frequency : 300 MHz Span : 600 MHz Bandwidth (BW) : 30 kHz Sweep : 500 mS The amplitude depends on the frequency used. Use the MARKER and DELTA MARKER to do the measurements. b. Adjust PWR ADJ preset, clockwise to obtain an RF Power reading on the Wattmeter of 250 W ± 1 W. c. Observe the spectrum on the Spectrum Analyzer and ensure no spurious signals or harmonics exist at a level of < -60 dBc. d. Maximum power at 88, 98, and 108 MHz e. Minimum power at 88, 98, and 108 MHz f. Harmonics and spurious at 88, 98 and 108 MHz g. Frequency accuracy at 88 MHz. h. Adjust rotary switches, on the Synthesiser PCB to configured frequency. i. Record the Results for Frequency accuracy and power output at configured Fr…

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FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003 FM-250 FM BROADCASTING EXCITER Issue Date: 21 Jan 2003

P9CFM-250 250W STEREO TRANSMITTER/EXCITER TECHNICAL DATA FOR FCC CERTIFICATION Test Set-up Photos 250W stereo transmitter connected to the test equipment on the bench showing output power Bench test setup for testing of 250W Stereo Transmitter showing connection to equipment test rack Test instrument rack P9CFM-250 250W STEREO TRANSMITTER/EXCITER TECHNICAL DATA FOR FCC CERTIFICATION List of Test Equipment Used MANUFACTURER: MODEL: S/N: Rohde & Schwarz Modulation Analyzer FAM 861194/004 Hewlett/Packard Spectrum Analyzer HP8590B 3017000493 Rohde & Schwarz Stereo Decoder MSDC2 861923/008 Rohde & Schwarz Audio Analyzer UPA3 860041/011 Hewlett/Packard Frequency Counter HP5384A 2730A04738 Bird Power Meter Model 43 256122 Dielectric Load 8251 11952 Bird Attenuator 8325 4039