Broadcast Electronics AM-500A Manual

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AM–500A 500 WATT

AM–1A 1 KILOWATT

AM BROADCAST

TRANSMITTERS

October, 1999

IM No. 597–1112

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Page 1 AM–500A 500 WATT AM–1A 1 KILOWATT AM BROADCAST TRANSMITTERS October, 1999 IM No. 597–1112...
Page 2 WARRANTY ADJUSTMENT. Broadcast Electronics, Inc. warranty is included in the Terms and Conditions of Sale. In the event of a warranty claim, replacement or repair parts will be supplied F.O.B. factory. At the discretion of Broadcast Electronics, the customer may be required to return the defective part or equipment to Broadcast Electronics, Inc.
Page 3 WARNING OPERATING HAZARDS READ THIS SHEET AND OBSERVE ALL SAFETY PRECAUTIONS ALL PERSONS WHO WORK WITH OR ARE EXPOSED TO POWER TRANSISTORS MUST TAKE PRECAUTIONS TO PROTECT THEMSELVES AGAINST POSSIBLE SERIOUS BODILY INJURY. EXERCISE EXTREME CARE AROUND SUCH PRODUCTS. UNINFORMED OR CARELESS OPERATION OF THESE DEVICES CAN RESULT IN POOR PERFORMANCE, DAMAGE TO THE DEVICE OR PROPERTY, SERIOUS BODILY INJURY, AND POSSI- BLY DEATH.
Page 4 BROADCAST ELECTRONICS, INC. TRANSMITTER WARRANTY VOID NOTICE THE PRODUCT WARRANTY WILL BE VOID IF THE TRANSMITTER IS INSTALLED AT A SITE WITH INADEQUATE LIGHTNING PROTECTION AND A DEFECTIVE TRANSMISSION LINE SYSTEM. TO ENSURE THE TRANSMIT TER WARRANTY IS VALID FAILURE TO...
Page 5 BROADCAST ELECTRONICS, INC.
Page 6: Operating Hazards
WARNING WARNING OPERATING HAZARDS THE TRANSMITTER CONTAINS MULTIPLE CIRCUIT WARNING GROUNDS WITH HIGH AC AND DC POTENTIALS WITH RESPECT TO THE CABINET WHICH IS AT EARTH PO WARNING TENTIAL. DO NOT ENERGIZE THE TRANSMITTER WITH TEST EQUIPMENT CONNECTED TO THE TRANSMITTER OUTPUT NETWORK, RF POWER MOD ULE, RF COMBINER, OR POWER SUPPLY COMPO NENTS.
Page 8: Theory Of Operation
PARAGRAPH PAGE NO. SECTION III OPERATION SECTION IV THEORY OF OPERATION...
Page 9: Maintenance
PARAGRAPH PAGE NO. SECTION V MAINTENANCE...
Page 10: Parts List
PARAGRAPH PAGE NO. SECTION VI PARTS LIST SECTION VII DRAWINGS SECTION A APPENDIX TABLE NO. TITLE PAGE NO.
Page 11 TABLE NO. TITLE PAGE NO. FIGURE DESCRIPTION PAGE NO.
Page 12 FIGURE DESCRIPTION PAGE NO.
Page 13 ™ ™ ™ ™ ™ ™...
Page 15 DESCRIPTION DESCRIPTION...
Page 16: Specification
TABLE 1-1. ELECTRICAL CHARACTERISTICS (Sheet 1 of 3) PARAMETER SPECIFICATION RF POWER OUTPUT RF CARRIER FREQUENCY RANGE RF OUTPUT IMPEDANCE OUTPUT CONNECTOR LOAD VSWR HARMONIC AND SPURIOUS SUPPRESSION CARRIER FREQUENCY ± ° ° ° ° STABILITY CARRIER SHIFT TYPE OF MODULATION OPERATING MODES MODULATION CAPABILITY MODULATION INPUT...
Page 17: Audio Frequency Response
TABLE 1-1. ELECTRICAL CHARACTERISTICS (Sheet 2 of 3) PARAMETER SPECIFICATION AUDIO INPUT IMPEDANCE AUDIO FREQUENCY RESPONSE (MONOPHONIC) ± ± AUDIO HARMONIC DISTORTION NTERMODULATION DISTORTION (MONO) CCIF INTERMODULATION DISTORTION (MONO) TRANSIENT INTERMODULATION DISTORTION (MONO)
Page 18: Stereo Separation
TABLE 1-1. ELECTRICAL CHARACTERISTICS (Sheet 3 of 3) PARAMETER SPECIFICATION INCIDENTAL PHASE MODULATION (STEREOPHONIC) STEREO SEPARATION SQUAREWAVE OVERSHOOT SQUAREWAVE TILT NOISE AC INPUT VOLTAGE AC POWER CONSUMPTION...
Page 19: Remote Interface
TABLE 1-2. PHYSICAL AND ENVIRONMENTAL CHARACTERISTICS (Sheet 1 of 2) PARAMETER SPECIFICATION OVERALL EFFICIENCY SAFETY OUTPUT POWER METERING RF MONITORING PROVISIONS REMOTE INTERFACE PHYSICAL DIMENSIONS WEIGHT...
Page 20 TABLE 1-2. PHYSICAL AND ENVIRONMENTAL CHARACTERISTICS (Sheet 2 of 2) PARAMETER SPECIFICATION CUBAGE ENVIRONMENTAL COOLING OPERATING TEMPERATURE ° ° ° ° OPERATING HUMIDITY MAXIMUM ALTITUDE...
Page 22 WARNING ENSURE NO PRIMARY POWER IS CONNECTED TO THE TRANSMITTER BEFORE PROCEEDING. WARNING WARNING ENSURE THE GROUND STRAP IS CONNECTED BETWEEN THE ECU CHASSIS AND THE OUTPUT WARNING NETWORK CHASSIS.
Page 26 WARNING ENSURE NO PRIMARY POWER IS CONNECTED TO THE TRANSMITTER BEFORE PROCEEDING. WARNING THE TRANSMITTER MAY BE DAMAGED IF THE ECU CAUTION CIRCUIT BOARDS ARE NOT SECURELY SEATED INTO CAUTION THE CONNECTORS. REMOVING OR INSTALLING THE RF POWER MODULE CAUTION WITH THE TRANSMITTER ENERGIZED MAY RESULT IN DAMAGE TO THE MODULE.
Page 33 TRANSMITTER WARNING ENSURE PRIMARY POWER IS DISCONNECTED BE FORE PROCEEDING. WARNING...
Page 36 ° ° WARNING ENSURE PRIMARY POWER IS DISCONNECTED BE FORE PROCEEDING. WARNING...
Page 37 J1 EXTERNAL STEREO RF INPUT External Interlock Input Interlock +5V © COPYRIGHT 1996 BROADCAST ELECTRONICS, INC 597-1112-9 FIGURE 2-8. AM-1A/AM-500A RF OUTPUT AND MODULATION MONITOR CONNECTORS...
Page 38 WARNING ENSURE PRIMARY POWER IS DISCONNECTED BE FORE PROCEEDING. WARNING WARNING ENSURE PRIMARY POWER IS DISCONNECTED BE FORE PROCEEDING. WARNING WARNING ENSURE AN EARTH GROUND CONDUCTOR IS SE CURELY CONNECTED TO THE TRANSMITTER WARNING GROUND LUG.
Page 40 THE TRANSMITTER SITE LIGHTNING PROTECTION CAUTION SYSTEM MUST BE INSPECTED AND IN PROPER CAUTION WORKING CONDITION FOR RELIABLE TRANSMIT TER OPERATION. WARNING DISCONNECT ALL TRANSMITTER PRIMARY POWER BEFORE PROCEEDING. WARNING...
Page 43 THE TRANSMISSION LINE AND ANTENNA MUST BE CAUTION INSPECTED AND IN PROPER WORKING CONDITION CAUTION FOR RELIABLE TRANSMITTER OPERATION. WARNING ENSURE PRIMARY POWER IS DISCONNECTED BE FORE PROCEEDING. WARNING...
Page 44: Forward Power
THE TRANSMITTER POWER SUPPLY CONTAINS MUL WARNING TIPLE GROUND CIRCUITS WITH HIGH AC AND DC POTENTIALS WITH RESPECT TO THE CABINET WARNING WHICH IS AT EARTH POTENTIAL. NEVER OPERATE THE TRANSMITTER WITH THE TOP-PANELS RE MOVED. POWER FORWARD POWER REFLECTED POWER WARNING DISCONNECT ALL TRANSMITTER PRIMARY POWER BEFORE PROCEEDING.
Page 46 WARNING DISCONNECT ALL TRANSMITTER PRIMARY POWER BEFORE PROCEEDING. WARNING POWER WARNING DISCONNECT ALL TRANSMITTER PRIMARY POWER BEFORE PROCEEDING. WARNING POWER POWER...
Page 48 WARNING DISCONNECT ALL TRANSMITTER PRIMARY POWER BEFORE PROCEEDING. WARNING POWER POWER...
Page 50 TABLE 3-1. AM-1A/AM-500A CONTROLS AND INDICATORS (Sheet 1 of 2) INDEX NOMENCLATURE FUNCTION FORWARD POWER FORWARD POWER LOW/HIGH/OFF FORWARD POWER FORWARD POWER HIGH/LOW/OFF REFLECTED POWER REFLECTED POWER HIGH/LOW/VAC REFLECTED POWER REFLECTED POWER HIGH/LOW/VAC POWER...
Page 52 TABLE 3-1. AM-1A/AM-500A CONTROLS AND INDICATORS (Sheet 2 of 2) INDEX NOMENCLATURE FUNCTION RF POWER MODULE TABLE 3-2. ECU CONTROLS AND INDICATORS (Sheet 1 of 6) INDEX NOMENCLATURE FUNCTION EXCITER POWER MODULES POWER SUPPLY...
Page 53: Antenna Vswr
TABLE 3-2. ECU CONTROLS AND INDICATORS (Sheet 2 of 6) INDEX NOMENCLATURE FUNCTION ANTENNA VSWR POWER CONTROL...
Page 55 TABLE 3-2. ECU CONTROLS AND INDICATORS (Sheet 3 of 6) INDEX NOMENCLATURE FUNCTION POWER POWER POWER POWER RESET EXCITER MONITOR STEREO EXCITER MONITOR MODE EXCITER MONITOR L+R/L-R...
Page 56 TABLE 3-2. ECU CONTROLS AND INDICATORS (Sheet 4 of 6) INDEX NOMENCLATURE FUNCTION EXCITER MONITOR +/- POLARITY EXCITER MONITOR EXCITER MONITOR EXCITER MONITOR MODE POLARITY R/L-R L/L+R X10 EXCITER MONITOR MONO R/L-R R/L-R L/L+R L/L+R OVERTEMP ° ° FOLDBACK INTERLOCK REMOTE...
Page 57 TABLE 3-2. ECU CONTROLS AND INDICATORS (Sheet 5 of 6) INDEX NOMENCLATURE FUNCTION CONFLICT LIGHTNING...
Page 58 TABLE 3-2. ECU CONTROLS AND INDICATORS (Sheet 6 of 6) INDEX NOMENCLATURE FUNCTION TABLE 3-3. POWER MODULE CONTROLS AND INDICATORS (Sheet 1 of 3) INDEX NOMENCLATURE FUNCTION PA 1 RF DRIVE PA 1 FAULT PA 2 RF DRIVE PA 2 FAULT...
Page 59 © COPYRIGHT 1996 BROADCAST ELECTRONICS, INC 597-1112-31 FIGURE 3-3. AM-1A POWER MODULE CONTROLS AND INDICATORS TABLE 3-3. POWER MODULE CONTROLS AND INDICATORS (Sheet 2 of 3) INDEX NOMENCLATURE FUNCTION MOD PWM DRIVE MOD POWER MOD FAULT MOD FUSE...
Page 60 TABLE 3-3. POWER MODULE CONTROLS AND INDICATORS (Sheet 3 of 3) INDEX NOMENCLATURE FUNCTION MOD SAMPLE ENSURE THE TRANSMITTER IS COMPLETELY IN NOTE STALLED PRIOR TO PERFORMING THE FOLLOWING NOTE PROCEDURES. POWER FORWARD REFLECTED FORWARD REFLECTED...
Page 61 FORWARD POWER FORWARD POWER HIGH HIGH HIGH FORWARD POWER FORWARD POWER REFLECTED POWER REFLECTED POWER HIGH HIGH HIGH REFLECTED POWER POWER FORWARD REFLECTED POWER FORWARD REFLECTED...
Page 62 MONO TO PREVENT DAMAGE TO THE TRANSMITTER, EN CAUTION SURE THE TRANSMITTER PRIMARY POWER IS OPER CAUTION ATED TO OFF BEFORE REMOVING THE STEREO CIR CUIT BOARD. MONO STEREO MONO STEREO L/R/L+R/L-R MODE L+R/L-R EXCITER MONITOR POLARITY EXCITER MONITOR EXCITER MONITOR L/L+R R/L-R...
Page 63: Power Supply Fault Reset
RESET POWER SUPPLY FAULT RESET RESET POWER POWER RESET TRANSMITTER MONITOR...
Page 66 BLANK PAGE...
Page 77 WARNING THE TRANSMITTER CONTAINS MULTIPLE CIRCUIT GROUNDS WITH HIGH AC AND DC POTENTIALS WITH RESPECT TO THE CHASSIS WHICH IS AT WARNING EARTH POTENTIAL. DO NOT ENERGIZE THE WARNING TRANSMITTER WITH TEST EQUIPMENT CON NECTED TO THE TRANSMITTER OUTPUT WARNING NETWORK, RF POWER MODULE, RF COMBINER, OR POWER SUPPLY COMPONENTS.
Page 78 WARNING NEVER OPEN THE EQUIPMENT UNLESS ALL TRANS MITTER PRIMARY POWER IS DISCONNECTED. EN SURE ALL TRANSMITTER PRIMARY POWER IS DIS WARNING CONNECTED BEFORE ATTEMPTING MAINTENANCE ON ANY AREA WITHIN THE TRANSMITTER.
Page 79 WARNING NEVER OPEN THE EQUIPMENT UNLESS ALL TRANS MITTER PRIMARY POWER IS DISCONNECTED. EN SURE ALL TRANSMITTER PRIMARY POWER IS DIS WARNING CONNECTED BEFORE ATTEMPTING MAINTENANCE ON ANY AREA WITHIN THE TRANSMITTER. WARNING NEVER OPEN THE EQUIPMENT UNLESS ALL TRANS MITTER PRIMARY POWER IS DISCONNECTED.
Page 80: Indicator Function
TABLE 5-1. AM-1A/AM-500A INDICATORS (Sheet 1 of 3) ASSEMBLY INDICATOR FUNCTION...

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