P9CFM-2525W Stereo Transmitter/Exciter

FM-25 FM BROADCASTING EXCITER Page 1 FM-25 25W STEREO TRANSMITTER/EXCITER TECHNICAL MANUAL LARCAN USA INC. 1390 Overlook Drive #2 Lafayette, CO 80026 USA Tel: (303) 6658000 Fax: (303) 6739900 Email: [email protected] Web: www.larcan.com FM-25 FM BROADCASTING EXCITER Page 2 FM-25 25W 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 USA INC. 1390 Overlook Drive #2 Lafayette, CO 80026 USA Tel: (303) 6658000 Fax: (303) 6739900 Email: [email protected] Web: www.larcan.com FM-25 FM BROADCASTING EXCITER Page 3 INTRODUCTION This manual contains the operating, technical and installation information for the LARCAN FM- 25 FM Broadcasting Exciter. The Exciter forms part of a new range of Professional FM Broadcast Exciters supplied by LARCAN and manufactured by Broadcast Solutions Electronics (Pty) Ltd. 1. The FM-25 Exciter forms a compact, solid state FM Broadcast transmitter with a RF output in excess of 25W in the FM Broadcasting band (87.5MHz to 108MHz). The unit is housed in a 19 inch rack mount case occupying only a 1U space. The Exciter features a range of customer options including a built in, high quality Stereo coder. 2. The FM-25 25W Transmitter / Exciter is fully compatible with the Ibiquity IBOC digital Audio system to be implemented. 3. The FM-25 Exciter offers a standard specification, well above the requirements of major broadcasters in the world. This level of performance is only found in the very best equipment the market has to offer. 4. The following basic versions are available: a) FM-25 (W) Wideband MPX Exciter (For use with composite input). b) FM-25 (S) Stereo Exciter (With built in Stereo coder and Audio Limiter). c) FM-25 (M) Mono Exciter (For use with Mono input). FM-25 FM BROADCASTING EXCITER Page 4 25W STEREO TRANSMITTER/EXCITER TECHNICAL MANUAL General Description LARCAN USA INC. 1390 Overlook Drive #2 Lafayette, CO 80026 USA Tel: (303) 6658000 Fax: (303) 6739900 Email: [email protected] Web: www.larcan.com FM-25 FM BROADCASTING EXCITER Page 5 GENERAL DESCRIPTION 1. STRUCTURE. The Exciter comprises of the following modules. a) Synthesizer/Modulator module (98052100). b) Control/Monitoring module (98052200). c) 25W RF PA module (98052700). d) Power supply module (98053000). e) Display module (98052400). f) Stereo coder/Limiter (378-Z0021). (optional). Each module is Field replaceable, in line with LARCAN maintenance philosophy. This allows the customer to change a module, or to upgrade options easily. 2. FEATURES. The FM-25 Exciter has standard features including the following; a) Remote/Internal frequency selection (standard). b) Remote telemetry with voltage free contacts (standard). c) +24V 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-25 FM BROADCASTING EXCITER Page 6 Refer to the Front panel layout and Rear panel controls and connectors in figure 1, and the Block diagram of FM-25 in Figure 2 FM-25 FM BROADCASTING EXCITER Page 7 Figure 1: Front panel layout and rear panel connectors and functions FM-25 FM BROADCASTING EXCITER Page 8 STEREO CODER 378-Z0021 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. 25W 98081 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 980803 SK3 OV SK1 ALC TEMP CNTRL FWD REFL PL3PL1PL2SK1SK2 PL1 PL2 PL3 DISPLAY PCB 980802 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 120VA TRANSFORMER RF MONITOR FRONT PANEL (BNC) OV 115V 60Hz (IEC INPUT) E N L 0V +24V +24V AC 115V 60Hz FRONT PANEL POWER SWITCH PL4 MAIN PSU 2A D.C. INPUT SK2/2SK2/1 PL3 PL2 25W STEREO EXCITER BLOCK SCHEMATIC SK4 Figure 2: block diagram of FM-25 FM-25 FM BROADCASTING EXCITER Page 9 a) SYNTHESIZER AND MODULATOR (98052100) 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 exist. b) RF PA MODULE (98052700) The RF output (Nominally +10dBm) from the synthesizer buffer is amplified by a three stage RF power amplifier to obtain the final output power of >25W. The final device is operated in push-pull mode to obtain high efficiency. All devices are operated well within their ratings. Wideband techniques are used throughout the PA and a built in harmonic filter is used at the output to suppress all harmonics. Directional couplers are used to sample the output for control and monitoring purposes. A temperature sensing device is provided for thermal monitoring. This device is situated at the final RF Stage to provide accurate temperature monitoring of the RF PA Heatsink. Current and voltage sensing is provided…

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P9CFM-25 25W STEREO TRANSMITTER/EXCITER TECHNICAL DATA FOR FCC CERTIFICATION Attestation Statement

P9CFM-25 25W STEREO TRANSMITTER/EXCITER TECHNICAL DATA FOR FCC CERTIFICATION Cover Letter

P9CFM-25 25W STEREO TRANSMITTER/EXCITER TECHNICAL DATA FOR FCC CERTIFICATION External Photo

FM-25 FM BROADCASTING EXCITER 862-90002 P9CFM-25 25W STEREO TRANSMITTER/EXCITER TECHNICAL DATA FOR FCC CERTIFICATION General Description FM-25 FM BROADCASTING EXCITER 862-90002 INTRODUCTION The FM-25 Stereo Transmitter/Exciter forms part of a new range of Professional FM Broadcast Exciters produced by Broadcast Solutions Electronics. 1. The FM-25 Transmitter/Exciter forms a compact, solid state FM Broadcast transmitter with a RF output in excess of 25W in the FM Broadcasting band (87.5MHz to 108MHz). The unit is housed in a 19 inch rack mount case occupying only a 1U space. The Exciter features a range of customer options including a built in, high quality Stereo coder and RS485 Telemetry. 2. The FM-25 Transmitter/ Exciter offers a standard specification, well above the requirements of major broadcasters in the world. This level of performance is only found in the very best equipment the market has to offer. 3. The following basic versions are available: a) FM-25 (W) Wideband MPX Exciter (For use with composite input). b) FM-25 (S) Stereo Exciter (With built in Stereo coder and Audio Limiter). c) FM-25 (M) Mono Exciter (For use with Mono input). 4. STRUCTURE. The Transmitter/Exciter comprises of the following modules. a) Synthesizer/Modulator module (98052100). b) Control/Monitoring module (98052200). c) 25W RF PA module (98052700). d) Power supply module (98053000). e) Display module (98052400). f) Stereo coder/Limiter (98052000). (optional). Each module is Field replaceable, in line with BSE maintenance philosophy. This allows the customer to change a module, or to upgrade options easily. FM-25 FM BROADCASTING EXCITER 862-90002 5. FEATURES The FM-25 Exciter has standard features including the following; a) Remote/Internal frequency selection (standard). b) Remote telemetry with voltage free contacts (standard). c) +24V 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 and Rear panel controls and connectors in Figure 1, and the Block diagram of FM-25 in Figure 2 FM-25 FM BROADCASTING EXCITER 862-90002 Figure 1: Front panel layout and rear panel connectors and functions FM-25 FM BROADCASTING EXCITER 862-90002 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. 25W 98081 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 PL4PL5 THUMBWHEEL (OPTION) PSU PCB 980803 SK3 OV SK1 ALC TEMP CNTRL FWD REFL PL3PL1PL2SK1SK2 PL1 PL2 PL3 DISPLAY PCB 980802 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 120VA TRANSFORMER RF MONITOR FRONT PANEL (BNC) OV230V 50Hz (IEC INPUT) E N L 0V +24V +24V AC 230V 50Hz PL4 MAIN PSU 2A D.C. INPUT SK2/2SK2/1 PL3 PL2 25W STEREO EXCITER BLOCK SCHEMATIC SK4 Figure 2: Block diagram of FM-25

P9CFM-25 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-25 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-25 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-Z0122 FACTORY SET-UP TEST SPECIFICATION FOR 25W FM EXCITER FM-25 ISSUE STATE This Issue consists of the following Pages: Page No. Issue Page No. Issue Page No. Issue 1-14 1 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–25 PTS 1 PART 1 : INTRODUCTION The objective of this specification is to outline the electrical tests required for the production testing of the FM-25 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 100 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 0-30 V, 3A 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 +24 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 2.4.1 Switch ON Sequence Figure 1. Test Setup --------------------------------------------------------------------------- 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 3 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 < 2 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 25 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 Freq…

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FM-25 FM BROADCASTING EXCITER Page 35 FM-25 FM BROADCASTING EXCITER Page 36 FM-25 FM BROADCASTING EXCITER Page 37 FM-25 FM BROADCASTING EXCITER Page 43 FM-25 FM BROADCASTING EXCITER Page 44 FM-25 FM BROADCASTING EXCITER Page 45 FM-25 FM BROADCASTING EXCITER Page 46 FM-25 FM BROADCASTING EXCITER Page 49 FM-25 FM BROADCASTING EXCITER Page 50 FM-25 FM BROADCASTING EXCITER Page 51 FM-25 FM BROADCASTING EXCITER Page 52 FM-25 FM BROADCASTING EXCITER Page 53 FM-25 FM BROADCASTING EXCITER Page 56 FM-25 FM BROADCASTING EXCITER Page 57 FM-25 FM BROADCASTING EXCITER Page 58 FM-25 FM BROADCASTING EXCITER Page 59 FM-25 FM BROADCASTING EXCITER Page 62 FM-25 FM BROADCASTING EXCITER Page 65 FM-25 FM BROADCASTING EXCITER Page 66

P9CFM-25 25W STEREO TRANSMITTER/EXCITER TECHNICAL DATA FOR FCC CERTIFICATION Test Setup Photos

FM-100 FM BROADCASTING EXCITER 862-90001 Test instrument rack