TUOTX25-50FM Broadcast Transmitter type TX25-50

Broadcast Warehouse TX 25/50 FM BROADCAST TRANSMITTER No part of this manual may be re-produced in any form without prior written permission from Broadcast Warehouse. The information and specifications contained in this document is subject to change at any time without notice. Copyright 2001 Broadcast Warehouse For the latest contact information for Broadcast Warehouse please visit our website at, www.broadcastwarehouse.com Technical manual TX25/50 FM Transmitter technical manual page 2 CONTENTS 1.Introduction 1.1TX FM Transmitter 1.2Safety 1.3Front And Rear Panels 1.4Control And Monitor LCD 2.Installation And Setup 2.1Frequency Setup 2.2R.F. Power Setup 2.3Alarms 2.4RS232 Control & Monitoring 2.41RS232 Interface board 2.42Windows application 2.43Terminal control 2.5Modes Of Operation 2.51A guide to the jumpers 2.52Multiplex / Broadband Input 2.53Stereo With Limiters 2.54Stereo With Limiters Disabled 2.55Mono From Two Channels 2.56Mono From One Channel 2.6Other Setup Considerations 3.Technical data 3.1Specifications 3.2Circuit Description 3.3Block Diagram 3.4Internal Wiring / Case Overview 3.5Schematics 3.51LCD Control Section 3.52Power Amplifier Section 3.53All In One Exciter Section 3.531 Limiter Section 3.532 Coder Section 3.533 Exciter Section 3.6Parts List 3.61LCD Control board parts list 3.62Power Amplifier board parts list 3.63Combo board parts list TX25/50 FM Transmitter technical manual page 3 Introduction 1.1TX 25/50 FM TRANSMITTER The Broadcast Warehouse TX 25/50 is a high specification FM broadcast transmitter. Its broadband “no-tune” design allows 87.5-108 Mhz operation from internal direct reading rotary switches or the front panel LCD frequen- cy control system if enabled. Digital PWM techniques provide an easily adjustable and accurate automatic level controlled R.F. output of the Mos-Fet power amplifier stage. R.F., Audio and other parameters are shown on the LCD graphics display. This display offers a very easy method of transmitter parameter monitoring and a new level of ease for setup and installation, with metering accuracy nor- mally only found on expensive test equipment. Local and remote personal computer control and metering are achievable via the innovative dual method RS232 interface. The FM modulator section employs a dual speed “virtual VFO” system for extremely low audio distortion and excellent stereo performance. A built in high specification stereo encoder provides crystal clear stereo sound and combined with the internal lim- iter a fully compliant “plug and play” all in one low power broadcast transmitter. For future compatibility all settings are switchable with on board jumpers. The stereo and/or limiter settings can be switched in and out to suit the requirements of any external broadcast equipment you may have now and in the future. The lightweight universal mains input design ensures a high reliability efficient design compatabile with any mains system in the world. TX25/50 FM Transmitter technical manual page 4 Introduction 1.2SAFETY MAINS VOLTAGE. This equipment operates from an AC power source of between 90 and 265 volts. There are hazardous voltages present internally. PLEASE OBSERVE CAUTION WITH THE COVER REMOVED. SWITCHED MODE POWER SUPPLY HAZARD Please note that the power supply units in this equipment is of the switched mode variety and have lethal voltages present internally. The switched mode supplies are universal input fully approved type. They are non serviceable modules and should be fully replaced should they fail. FUSES Only use fuses with the specified voltage and current ratings as stated on the back panel. Failure to do so may increase the risk of equipment failure, shock and fire hazard. R.F. The N type R.F. power output socket contains R.F. voltages which may burn or present a shock. Please make sure that the equipment is connected to an adequately rated load or antenna system while in opera- tion. TOXIC HAZARD This equipment includes R.F. components that may contain Beryllium oxide which is a highly toxic sub- stance that could be hazardous to health if inhaled or ingested. Care should be taken when replacing or discarding such devices. Seek expert advice from the manufacturer should you physically damage a device that contains Berillyium Oxide. The main R.F. output power transistor contains Beryllium oxide. OTHER SAFETY CONSIDERATIONS Do not operate this equipment in the presence of flammable gases, fumes or liquids Do not expose this equipment to rain or water. TX25/50 FM Transmitter technical manual page 5 Introduction 1.3FRONT AND REAR PANELS FUSE 1 2 3 4 5 67 8 9 11 13 12 10 TX25/50 FM TRANSMITTER 1. Left audio input 2. Left Input gain 3. Right input gain 4. Right audio input 5. MPX output 6. MPX level control 7. MPX Input 8. Control / Logic 9. R.F. output 10 LCD display 11. Power socket 12. Up / Down frequency buttons 13. Chassis ground post. Control / logic D-type pin outPin 1 PLL failure alarm (O/C) Pin 2 Reserved Pin 3 Reserved Pin 4 R.F. failure alarm (O/C) Pin 5 R.F. failure alarm (TTL) Pin 6 Mod failure alarm (TTL) Pin 7 PLL failure alarm (TTL) Pin 8 R.F. Mute (Connect to GND for mute) Pin 9 Mod failure alarm (O/C) Pin 10 RS232 TXDPin 11 RS232 RXDPin 12 ReservedPin 13 ReservedPin 14 +18 VDC 200mAPin 15 GND XLR Audio input connectorsPin 1 Ground Pin 2 Hot Pin 3 Cold 3 2 1 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Front panel:R.F. MONITOR: -50dBC ( Not suitable for harmonic measurements )MOD. MONITOR: ( Buffered multiplex, Nominally 3 V peak to peak for 75 KHz ) TX25/50 FM Transmitter technical manual page 6 Introduction 1.4CONTROL AND MONITOR LCD The front panel LCD graphics display has seven screens (shown below). These allow monitoring of the transmit- ter’s R.F., audio and other parameters and the adjustment (if internally allowed) of the transmitter’s power and fre- quency. You can move through the screens by pressing the NEXT button, which will display them in the following order. Main parameter screen. This shows to…

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Letter of Agency December 07 2005 TRL Compliance Services Ltd Long Green Forthampton Gloucester GL19 4QH UK To Whom It May Concern: We certify that we are not subject to denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse ACT of 1988, U.S.C. 862. Further, no party, as defined in 47 CFR 1.2002(b), to the application is subject to denial of federal benefits, that includes FCC benefits. Thank you for your attention to this matter. Thank you for your attention to these matters. Yours faithfully Broadcast Warehouse Limiteed Scott Incz

TX25/50 FM Transmitter technical manual page 30 Technical data 3.3BLOCK DIAGRAM

FCC Labelling Requirements and Information December 07 2005 TRL Compliance Services Ltd Long Green Forthampton Gloucester GL19 4QH UK RE: FCC Labelling Requirements FCC ID: TUO TX25-50 The following label information is required by the FCC Rules and Regulations for certified devices. Also attached, please find marketing information required by the FCC Rules and Regulations. Thank you for your attention to these matters. Yours faithfully Broadcast Warehouse Limited Scott Incz FCC ID: TUO TX25-50

TX25/50 FM Transmitter technical manual page 3 Introduction 1.1TX 25/50 FM TRANSMITTER The Broadcast Warehouse TX 25/50 is a high specification FM broadcast transmitter. Its broadband “no-tune” design allows 87.5-108 Mhz operation from internal direct reading rotary switches or the front panel LCD frequen- cy control system if enabled. Digital PWM techniques provide an easily adjustable and accurate automatic level controlled R.F. output of the Mos-Fet power amplifier stage. R.F., Audio and other parameters are shown on the LCD graphics display. This display offers a very easy method of transmitter parameter monitoring and a new level of ease for setup and installation, with metering accuracy nor- mally only found on expensive test equipment. Local and remote personal computer control and metering are achievable via the innovative dual method RS232 interface. The FM modulator section employs a dual speed “virtual VFO” system for extremely low audio distortion and excellent stereo performance. A built in high specification stereo encoder provides crystal clear stereo sound and combined with the internal lim- iter a fully compliant “plug and play” all in one low power broadcast transmitter. For future compatibility all settings are switchable with on board jumpers. The stereo and/or limiter settings can be switched in and out to suit the requirements of any external broadcast equipment you may have now and in the future. The lightweight universal mains input design ensures a high reliability efficient design compatabile with any mains system in the world. TX25/50 FM Transmitter technical manual page 25 Technical data RF Power Connector Harmonics Spurious Frequency range Frequency steps Frequency selection Frequency control type Frequency stability MPX input MPX input level MPX input response Modulation STEREO Subcarrier generation Pilot pilot generation Output level (BNC) 15 KHz filtering 15KHz overshoot filter clipping Spurious > 80 KHz >160 KHz Stereo separation LIMITER Audio input levels Audio input connectors Input cmrr Audio distortion Tone Program material Frequency response Limiter control range Input impedance pre-emphasis Process modes Clipping OTHER Control system External control/monitor Size Weight Voltage input Current input Power connector Switched mode approvals 3-25W (TX25) 5-50W (TX50) N type 50 ohm better than 65 dbc < -75 dbc 87.5 - 108 MHz 100KHz from LCD or 12.5 KHz from internal switches Internal switches or LCD system Dual speed Phase locked loop < +/- 500 Hz (fine adjustment available) BNC MPX input level -10dB to +10dB (adjustable) MPX input response +/- 0.3 dB, 5 Hz to 100 KHz Modulation direct frequency modulation Microprocessor generated 8x over-sampled 19KHz +/- 1 Hz (adjustable) Microprocessor generated 16x over-sampled (BNC) 0dB >40db at 19KHz On or off > -60dBr > -80dBr >55db (20hz-15KHz) -10db - +18dB for limiting XLR balanced (RF shielded) >60dB <.1% at limiting 1 KHz (clarity mode) program dependent 20 Hz to 20KHz +/- 0.5dB (pre-emphasis off) Limiter control range >24dB (pre-emphasis off) 10k 50uS,75uS and 0uS(off) Clarity and loud On or off 3 buttons, 122x32 graphics display 15 way D-type, Female 475mm x 44mm x 300mm 1.5kg 85-260 VAC 110V-4A / 220V-2A IEC,FUSED and switchable UL / TUV / CE 3.1SPECIFICATIONS

TX25/50 FM Transmitter technical manual page 37 Technical data 3.6PARTS LIST 3.61 LCD control board RESISTORS R133K1/8 Watt Carbon Film R233K1/8 Watt Carbon Film R3820R1/8 Watt Carbon Film R4390R1/8 Watt Carbon Film R5390R1/8 Watt Carbon Film R610K1/8 Watt Carbon Film R7820R1/8 Watt Carbon Film R8820R1/8 Watt Carbon Film R9820R1/8 Watt Carbon Film R10820R1/8 Watt Carbon Film R11820R1/8 Watt Carbon Film R121K8`1/8 Watt Carbon Film R131K81/8 Watt Carbon Film R141K81/8 Watt Carbon Film R15100R1/8 Watt Carbon Film R1633K1/8 Watt Carbon Film R17620R1/8 Watt Carbon Film R18100R1/8 Watt Carbon Film R19100K1/8 Watt Carbon Film R20100R1/8 Watt Carbon Film R214K71/8 Watt Carbon Film R22100R1/8 Watt Carbon Film R2310K1/8 Watt Carbon Film R2410K1/8 Watt Carbon Film R25-not fitted R26-not fitted CAPACITORS C147UMiniature Radial Electrolytic C247UMiniature Radial Electrolytic C333PFCeramic Plate 2.5 pitch (680) C433PFCeramic Plate 2.5 pitch (680) C5-11560PFCeramic Plate 2.5 pitch (680) C12100NMonolithic Ceramic 2.5 pitch C132U2Miniature Radial Electrolytic C14560PFCeramic Plate 2.5 pitch (680) C15100NMonolithic Ceramic 2.5 pitch C16560PFCeramic Plate 2.5 pitch (680) C17560PFCeramic Plate 2.5 pitch (680) C182U2Miniature Radial Electrolytic MISC VR15K5mm MiniPot VR2100K5mm MiniPot D1-LINKED ON PCB D2-WIRE LINK LED11N4148400mW Glass Axial LED2GREEN3MM GREEN LED LED3RED3MM RED LED X18MHZHC49/U microprocessor crystal REG17805TO220 1A 5 V regulator IC1PIC16F87740 pin 8 Bit micro Controller IC2CA3240op-amp T1TIP32APNP Transistor SW1-3 BUTTONSBlue buttons CON110W IDCIDC boxed header CON216W IDCIDC boxed header LCD1122x32NAN YA LMD62S042JM 3.62 Power amplifier board RESISTORS R13K31/4 Watt Metal Oxide R2S.O.T1/4 Watt Metal Oxide R3-NOT FITTED R43K31/4 Watt Metal Oxide R513K1/4 Watt Metal Oxide R610K1/4 Watt Metal Oxide R710K1/4 Watt Metal Oxide R818K1/4 Watt Metal Oxide R918K1/4 Watt Metal Oxide R1075R1/4 Watt Metal Oxide R11560R3 Watt R123R32 Watt R136K81/4 Watt Metal Oxide R14560R1/4 Watt Metal Oxide R15150R1 Watt R16150R1 Watt R1751R1/4 Watt Metal Oxide R18-NOT FITTED R1910R1/4 Watt Metal Oxide R20820R1/4 Watt Metal Oxide R21820R1/4 Watt Metal Oxide R22470R1/4 Watt Metal Oxide R2310K1/4 Watt Metal Oxide R2410K1/4 Watt Metal Oxide R2510K1/4 Watt Metal Oxide R26-NOT FITTED R20820R1/4 Watt Metal Oxide R21820R1/4 Watt Metal Oxide R22470R1/4 Watt Metal Oxide R2310K1/4 Watt Metal Oxide R24470R1/4 Watt Metal Oxide R2510K1/4 Watt Metal Oxide R2612R1/4 Watt Metal Oxide R2712R1/4 Watt Metal Oxide R28-NOT FITTED R29330R1/4 Watt Metal Oxide R30470R1/4 Watt Metal Oxide R3110K1/4 Watt Metal Oxide R32470R1/4 Watt Metal Oxide R331K1/4 Watt Metal Oxide R341K1/4 Watt Metal Oxide R3539RSMD 2512 VR110Kpot VR21Kpot VR31Kpot CAPACITORS C1470PF5mm pitch C247PFDisc Ceramic 2.5mm pitch C3120PFDisc Ceramic 2.5mm pitch C4100PFDisc Ceramic 2.5mm pitch C510NDisc Ceramic 2.5mm pitch C60.1UMin Polyester C7330PFDisc Ceramic 2.5mm pitch C822UElectrolytic 63V Radial C922UElectrolytic 63V Radial C1010NDisc Ceramic 2.5mm pitch C11100UElectrolytic 63V Radial TX25/50 FM Transmitter technical manual page 38 Technical data C12100UElectrolytic 63V Radial C1310NDisc Ceramic 2.5mm pitch C1410NDisc Ceramic 2.5mm pitch C1510NDisc Ceramic 2.5mm pitch C162N2SMD C172N2SMD C1847PFDisc Ceramic 2.5mm pitch C1947PFDisc Ceramic 2.5mm pitch C2047PFDisc Ceramic 2.5mm pitch C2139PFMinature low K 2.5mm pitch C22-NOT FITTED C2347PFDisc Ceramic 2.5mm pitch C2439PFMinature low K 2.5mm pitch C258P2Ceramic 2.5 pitch C2618PMinature low K 2.5mm pitch C2722PDisc Ceramic 2.5mm pitch C2812PMinature low K 2.5mm pitch C2922PDisc Ceramic 2.5mm pitch C303.3PDisc Ceramic 2.5mm pitch C311NHigh Voltage C32100UElectrolytic 63V Radial C33100UElectrolytic 63V Radial C3410NDisc Ceramic 2.5mm pitch C3510NDisc Ceramic 2.5mm pitch C3610NDisc Ceramic 2.5mm pitch C3710NDisc Ceramic 2.5mm pitch C3810NDisc Ceramic 2.5mm pitch C3910NDisc Ceramic 2.5mm pitch C4010NDisc Ceramic 2.5mm pitch INDUCTORS L14 TURN COIL0.9mm silvered copper wire L22 TURN COIL0.9mm silvered copper wire L3COILS18 Orange Toko L42 TURN COIL18 Gauge silvered copper wire L52 TURN COIL18 Gauge silvered copper wire L6COILS18 Red Toko L7COILS18 Red Toko L8FBAxial Ferrite bead MISC REG1781818 V 1A Regulator IC1CA3240op-amp IC2CA3240op-amp T1SRFE1130PRF Power Transistor D1BAT42Rectifier Diode D2 BAT42Rectifier Diode TS1LM335ZTemperature sensor CON1PCB MCXMCX connector CON2PCB MCXMCX connector CON35Term5 Way Screwless Terminal CON44Term4 Way Screwless Terminal CON510WayIDC Box Header 90 degree RFT1RFTVSWR Coupler Toroid 3.63 Combo board CAPACITORS C12.2 uF 16VMiniature Radial Electrolytic C22.2 uF 16VMiniature Radial Electrolytic C3100n Y5VMonolithic Ceramic 2.5 pitch C439pF Ceramic Plate 2.5 pitch (680) C52.2 uF 16VMiniature Radial Electrolytic C6470uF 16VRadial Electrolytic C7470uF 16VRadial Electrolytic C82.2 uF 16VMiniature Radial Electrolytic C92.2 uF 16VMiniature Radial Electrolytic C1082pFCeramic Plate 2.5 pitch (680) C11100n Y5VMonolithic Ceramic 2.5 pitch C12100uF 16VMonolithic Ceramic 2.5 pitch C132.2 uF 16VMiniature Radial Electrolytic C14100n Y5VMonolithic Ceramic 2.5 pitch C1582pFCeramic Plate 2.5 pitch (680) C16100n Y5VMonolithic Ceramic 2.5 pitch C17100uF 16VRadial Electrolytic C18100uF 16VRadial Electrolytic C191nGen. Pur. Ceramic Disc 2.5 pitch C20220pFCeramic Plate 2.5 pitch (680) C214p7Ceramic Plate 2.5 pitch (680) C2227pFCeramic Plate 2.5 pitch (680) C2356pFCeramic Plate 2.5 pitch (680) C2482pFCeramic Plate 2.5 pitch (680) C251nGen. Pur. Ceramic Disc 2.5 pitch C26100n Y5VMonolithic Ceramic 2.5 pitch C2782pFCeramic Plate 2.5 pitch (680) C28100n Y5VMonolithic Ceramic 2.5 pitch C29100n Y5VMonolithic Ceramic 2.5 pitch C3027pFCeramic Plate 2.5 pitch (680) C3112pFCeramic Plate 2.5 pitch (680) C3256pFCeramic Plate 2.5 pitch (680) C331nGen. Pur. Ceramic Disc 2.5 pitch C3433pFCeramic Plate 2.5 pitch (680) C35Not Used C36100n Y5VMonolithic Ceramic 2.5 pitch C37Not Used C3847pFCeramic Plate 2.5 pitch (680) C3947pFCerami…

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TX25/50 FM Transmitter technical manual page 32 Technical data 3.51 LCD control board TX25/50 FM Transmitter technical manual page 33 Technical data 3.52 Power amplifier board TX25/50 FM Transmitter technical manual page 34 Technical data 3.531Combo board, limiter section TX25/50 FM Transmitter technical manual page 35 Technical data 3.532Combo board, stereo encoder section TX25/50 FM Transmitter technical manual page 36 Technical data 3.533Combo board, PLL exciter section

File name BWBROADCAST.058 PAGE 1 OF 50 QMF21J – 3; FCC CFR 47 PART 2 J OCT 2004; ISSUE 01 OCT 05 FCC Licensed Transmitter Test Report for FM Broadcast Transmitter TX 25/50 Reference Standard 47CFR Part 2, Subpart J : Oct 2005 Manufacturer Broadcast Warehouse For type of equipment and serial number, refer to section 3 Report Number 10-058/2950/3A/05 Report Produced by: - R.N. Electronics Ltd. 1 Arnolds Court Arnolds Farm Lane Mountnessing Essex CM13 1UT U.K. www.rnelectronics.com Telephone +44 (0) 1277 352219 Facsimile +44 (0) 1277 352968 EMC & RADIO TEST SERVICES S RN Electronics ©2004 RN ELECTRONICS LIMITED REPORT NUMBER 10-059/2950/2A/05 ALL RIGHTS RESERVED QMF21J – 3; ETSI EN 302 0183-2 V1.2.1; ISSUE 01 SEP 05 This page has been left blank intentionally. ©2004 RN ELECTRONICS LIMITED REPORT NUMBER 10-059/2950/2A/05 ALL RIGHTS RESERVED QMF21J – 3; ETSI EN 302 0183-2 V1.2.1; ISSUE 01 SEP 05 1. Contents 1. Contents ...................................................................................................................................... 3 2. Summary of Test Results ............................................................................................................ 4 3. Information about Equipment Under Test .................................................................................. 5 4. Specifications .............................................................................................................................. 6 5. Tests, Methods and Results......................................................................................................... 7 6. Graphical Results ...................................................................................................................... 16 7. Photographs............................................................................................................................... 37 8. Signal Leads .............................................................................................................................. 47 9. Test Equipment Calibration list.................................................................................................48 10. Auxiliary Equipment ................................................................................................................. 49 11. Modifications ............................................................................................................................ 50 ©2004 RN ELECTRONICS LIMITED REPORT NUMBER 10-059/2950/2A/05 ALL RIGHTS RESERVED QMF21J – 3; ETSI EN 302 0183-2 V1.2.1; ISSUE 01 SEP 05 2. Summary of Test Results The FM Broadcast Transmitter TX 25/50 was tested for compliance to the following standard for licensed transmitters: - 47CFR Part 2, Subpart J: Oct 2005 47CFR Part 73: Oct 2005 Title References Results conducted: PASSED 1. RF Power Output. 47CFR Part 2, Subpart J radiated: NOT APPLICABLE frequency response: PASSED 2. Modulation Characteristics. 47CFR Part 2, Subpart J modulation limiting: PASSED 3. Occupied Bandwidth 47CFR Part 2, Subpart J PASSED 4. Spurious Emissions at Antenna Terminals. 47CFR Part 2, Subpart J PASSED 5. Field Strength of Spurious Radiation. 47CFR Part 2, Subpart J PASSED 6. Frequency Stability. 47CFR Part 2, Subpart J PASSED This report relates to the equipment tested as identified by a unique serial number and at the time it was tested. It does not relate to any other similar equipment and performance of the product before or after the test cannot be guaranteed. The measurement uncertainty, where stated, is the expanded uncertainty based on a standard uncertainty multiplied by a coverage factor of k=2, providing a level of confidence of approximately 95%. Date of Test:21 - 31 Oct 2005 Test Engineer: Approved By: ©2004 RN ELECTRONICS LIMITED REPORT NUMBER 10-059/2950/2A/05 ALL RIGHTS RESERVED QMF21J – 3; ETSI EN 302 0183-2 V1.2.1; ISSUE 01 SEP 05 3. Information about Equipment Under Test Applicant Broadcast Warehouse PO BOX 1630 Croydon CR9 4XX Brand name of EUT(s) Broadcast Warehouse Limited Model Number(s) of EUT(s) TX 25/50 FCC Identifier(s) TUO TX25-50 Serial Numbers of EUT(s) not stated Date when equipment was received by RN Electronics Limited 6th Oct 2005 Date of test: 21 - 31 Oct 2005 Customer order number: not stated Visual description of EUT: 19" rack mountable unit with LCD display and monitor ports on front panel. All other ports on rear. Main function of the EUT: FM broadcast transmission of audio. EUT Information specification. Height 44mm Width 480mm Depth 353mm Weight 2.5 kg Voltage 230Vac Current required from above voltage source not stated EUT Configurations for testing. Choice of model(s) for type testing highest power model of range (see report 10- 058/2950/3B/05) and this lower power model. Method of achieving an unmodulated carrier frequency remove stereo pilot tone jumper and reduce audio input to 0V. Audio capsule / test fixture used not applicable Declared power level 50W Declared channel bandwidth 200 kHz Channel frequencies used 87.5MHz (low), 97.7MHz (mid), 108.0MHz (high) Description of ancillary equipment connected to the equipment under test, for the purpose of tests, can be found in Section10. Auxiliary Equipment. Any modifications made to the EUT, whilst under test, can be found in Section 11. Modifications This report was printed on: 10 January 2006 ©2004 RN ELECTRONICS LIMITED REPORT NUMBER 10-059/2950/2A/05 ALL RIGHTS RESERVED QMF21J – 3; ETSI EN 302 0183-2 V1.2.1; ISSUE 01 SEP 05 4. Specifications The tests were performed by RN Electronics Engineer Paul Darragh who set up the tests, the test equipment, and operated it in accordance with the R.N. Electronics Ltd procedures manual and the relevant standards listed below. 4.1 Relevant Standards Standard Number Version Description 4.1.1 47CFR Part 73 Oct 2005 Part 73 - Radio Broadcast Services. [Subpart B - FM Broadcast Stations; Subpart H - Rules Applicable to All Broadcast Stations] 4.1.2 47CFR Part 2…

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