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3–8

FM1000A User’s Manual

3.5 Fuse Indicators

Illustration 3–9 Fuse Indicators

The PA1000 consists of two field-replacable power modules with two amplifiers in
each module. Each of the paralleled amplifiers is protected by a 10 ampere
fast-acting fuse. When a fuse opens, the indicator light next to it illuminates.
Fuses 3 and 4 represent amplifiers 1 and 2 on the top right module. Fuses 7 and 8
represent amplifiers 3 and 4 on the lower right power module.

Fault

Antenna

RF Drive

PA Temp

PA DC

PA1
PA2

PA3

PA4

PA5
PA6

PA7

PA8

Power Out

PA Temp

PA Voltage

Tot Current

PA3

PA4 PA7

PA8

Fuses

®

Fuses and Indicators

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Summary of Contents for FM1000A

Page 1: ...i FM1000A RF Amplifier Package User s Manual 2005 Crown Broadcast a division of International Radio and Electronics Inc 25166 Leer Drive Elkhart Indiana 46514 5425 U S A 574 262 8900...

Page 2: ...roduced transmitted transcribed stored in a retrieval system or translated into any language in any form by any means without the written permission of Crown International Inc Printed in U S A Crown a...

Page 3: ...I O Connection 2 6 Section 3 Operation 3 1 Initial Power up Procedures 3 2 3 2 Power Switches 3 4 3 2 1 AC Input Circuit Breaker 3 4 3 2 2 DC Power Switch 3 5 3 2 3 Interlock Switch 3 5 3 3 Digital Mu...

Page 4: ...ing Wave Ratio 5 3 5 2 3 ALC Automatic Level Control 5 3 5 2 4 Power Out 5 3 5 2 5 PA Temp 5 4 5 2 6 PA Voltage 5 4 5 2 7 Tot Current 5 4 5 2 8 PA1 8 5 4 5 3 Fault Indicators 5 5 5 3 1 Antenna 5 5 5 3...

Page 5: ...tting Acquainted This section provides a general description of the FM1000A power amplifier system and introduces you to safety conventions used within this document Review this material before instal...

Page 6: ...its are uniquely designed to be lightweight and compact for convenient shipping and require only seven RU spaces for installation Installa tion is made simple with just three interconnections between...

Page 7: ...odulation 75 kHz 400 Hz typically 60 dB Operating Environment Temperature Range 0 50 C at sea level Humidity Range 0 80 at 20 C noncondensing AC Power 240 Volts AC 10 15 50 60 Hz Power Consumption Les...

Page 8: ...rs DANGER represents the most severe hazard alert Extreme bodily harm or death will occur if DANGER guidelines are not followed 1 3 2 Warnings WARNING represents hazards which could result in severe i...

Page 9: ...2 1 Installation Section 2 Installation This section provides important guidelines for installing your power amplifier and power supply Review this information care fully for proper installation...

Page 10: ...tection grounding strap and or mat 2 3 Unpacking Before handling any exposed printed circuit boards ground yourself with an antistatic strap and or mat The power amplifier power supply and two power a...

Page 11: ...s should all be positioned to the center of the chassis also note the position of the connector on the modules and in the chassis 4 Insert the two power modules using their slide rails into the built...

Page 12: ...d inches 2 1 N m of torque 6 Tighten assembly screws to 10 pound inches 1 1 N m of torque 7 Tighten cord clamp screws to 10 pound inches 1 1 N m of torque 4 Loosen terminal screws Insert conductors fu...

Page 13: ...e exciter source such as a Crown Broadcast FM30 according to its instructions 4 Connect the RF input cable from the exciter source to the N connector on the back of the PA1000 5 Connect the RF output...

Page 14: ...lustrations 2 5 and 2 6 However for any remote operation to work the Remote Local slide switch must be in the REMOTE position Then the on board remote RAISE and LOWER push buttons and any external rem...

Page 15: ...er output level of the amplifier to be reduced below the internal limit set by the Local Power Adjust pot or the remote Raise Lower settings However some drive power less than one watt may still be pr...

Page 16: ...perature a buffered metering output with 1 V 20 C 12 SWR a buffered metering output with a calculated reading of standing wave ratio in VDC 13 RF Output Power a buffered metering output with a calcula...

Page 17: ...3 1 Operation Section 3 Operation This section provides general operating parameters of your power amplifier system and a detailed description of the front panel display...

Page 18: ...up the AC input circuit breaker located on the rear panel of the power supply do not turn on the front panel power switch yet 3 1 Initial Power up Procedures 5 Turn on the exciter a Crown FM30 or equ...

Page 19: ...unit is normally shipped with this setting See Section 2 6 for setting up remote operation and using the on board remote buttons and other controls 7 Turn on the main power switch located on the front...

Page 20: ...ditions are present as indicated by the PA1000 s Digital Multimeter a In Ref Should read between 0 4 and 0 8 volts 0 5 nominal dependent upon power input level b SWR Should read 1 05 to 1 5 c ALC Shou...

Page 21: ...llustration 3 6 Interlock Switch Interlock Switch Power I O Power Switch W WARNING ARNING Lethal voltages are still present on the AC Input Board So handle with care 3 2 3 Interlock Switch This switch...

Page 22: ...output voltage ALC will read about 6 0 volts When the RF output is being regulated by the RF power control circuit this voltage will be reduced typically reading 5 0 to 6 0 volts The ALC voltage will...

Page 23: ...t drive must be increased To achieve full output power 30 watts of input drive is required PA Temp PA heatsink temperature is greater than 75 C power foldback will begin at this point PA DC Power supp...

Page 24: ...rs is protected by a 10 ampere fast acting fuse When a fuse opens the indicator light next to it illuminates Fuses 3 and 4 represent amplifiers 1 and 2 on the top right module Fuses 7 and 8 represent...

Page 25: ...che non ha la dispozione do farlo M se diciamo che che non c e nulla nel mondo reale di ma scrivendo con la matita ci insegna a non parlare ma scrivendo con la matita ci insegna a non parlare in quest...

Page 26: ...ots on the left side are unpopulated The chassis of the power modules acts as a heat sink for the MOSFET amplifiers There are two power amplifiers mounted to spacer plates on each of the heat sinks fo...

Page 27: ...cated nearest the Output Filter It consists of a micro strip transmission line that combines the output power from the four ampli fiers two modules so that ultimately all the power comes together at o...

Page 28: ...and overtemperature conditions is designed into this board as well providing additional precaution against overheating This board is fail safe like all the other circuit board components in the FM100...

Page 29: ...urrent to DC Power and from there to the PFC Switch ing Board where the rectified DC is filtered The filtered DC power is then fed from the PFC Switching Board through an 80 turn boost inductor and ba...

Page 30: ...the power modules The DC Output Board also provides the 24 volts that operate the cooling fans in both the PS1000 and the PA1000 There are two parallel paths from the DC Output Board with half the pow...

Page 31: ...shooting TROUBLE TROUBLE TROUBLE Section 5 Troubleshooting This section describes procedures for service personnel to diag nose and troubleshoot potential fault conditions in the power amplifier and p...

Page 32: ...ur exciter turned on Secure all connections to the PS2000 Ensure AC input circuit breaker is flipped up Ensure main power switch is turned on Is exciter delivering sufficient RF drive Check In Ref met...

Page 33: ...he exciter to ensure proper power input level of 25 30 watts q Check RF input cable for secure connection 5 2 2 SWR Standing Wave Ratio If the SWR is over 1 5 1 then look for q effects of inclement we...

Page 34: ...gh SWR for overcurrent check PA DC fault indicator and if flashing check current for proper levels total and individual Power Amps for overtemperature ambient temperature higher than 50 C reduce tempe...

Page 35: ...check for icing moisture on the feedline and secure antenna connections Overcurrent check PA DC fault indicator if flashing monitor current for proper levels total and individual Power Amps Faulty DC...

Page 36: ...e replaced see Section 7 5 3 4 PA DC Discrepancy in current between the individual amplifiers or in total current There is a difference of current greater than 2 5 amps between any one of the 4 indivi...

Page 37: ...wings Section 6 Reference Drawings The illustrations in this section may be useful for making adjustments taking measurements troubleshooting or understanding the circuitry of your RF power amplifier...

Page 38: ...Breakers DC Input DC Input DC Output DC Output PS1000 PA1000 Air Intakes Filters Ground Screws Fans Power Control Air Exhaust Vents OFF OFF Illustration 6 2 Back View 6 1 Views Fault Antenna RF Drive...

Page 39: ...ock Diagram 30 W Exciter Crown FM30 PA1000 Power Amplifier 1 kW RF Power Output Remote I O Connector Power Supply Control 0 50 VDC PA Supply PS1000 Power Supply RF Input Excitation 240 VAC 50 60 Hz In...

Page 40: ...PS1000 Block Diagram 240 VAC AC CIRCUIT BREAKER AC INPUT NEUTRAL GROUND AC INPUT CCA POWER SWITCH RECTIFIER PFC CONTROL CCA DC OUTPUT CCA 0 to 50 VDC RETURN PS CONTROL 9 PIN DSUB 220 VDC 12 VDC VOLTA...

Page 41: ...ERNATIONAL RADIO AND ELECTRONICS CORP AND SHALL NOT BE REPRODUCED COPIED OR USED AS THE BASIS FOR THE MANUFACTURE OR SALE OF APPARATUS OR DEVICES WITHOUT PERMISSION 12V 12V 12V 12V POWER OFF ON 12V 12...

Page 42: ...30VDC C26 470 C25 470 C24 470 C23 470 VR1 7815CT IN 2 C 1 OUT 3 C19 1000 D2 1N4004 R23 15K 5 3W R24 15K 5 3W DZ2 24V R34 4 7K 5 HD2 1 2 QF1 IGBT 600V 50A FAST DL1 LED DS2 1N5822 QF4 IGBT 600V 50A FAST...

Page 43: ...00 D6 MBR3100 D7 MBR3100 D8 MBR3100 C13 1 C14 220 35V 27V C20 470pF D9 MUR130 D10 MUR130 D1 BYV44 300 D2 BYV44 300 D11 MUR130 D12 MUR130 D3 BYV44 300 D4 BYV44 300 D13 MUR130 D14 MUR130 L1 89 uH L3 89...

Page 44: ...6 8 FM1000A User s Manual Illustration 6 5 PA1000 Block Diagram...

Page 45: ...20K R1 82 R8 20K 1 2 3 4 5 HD1 R2 82 R3 10 BNC 1 3 C1201 1209A 1217 are circuit board pads NOTES _______ _______ 1 ALL RESISTORS ARE IN OHMS 1 4W 5 UNLESS OTHERWISE SPECIFIED 2 ALL CAPACITORS ARE IN...

Page 46: ...0 01 PA OUTPUT BD T1121 T11S R1114 5 6 2W R1115 5 6 2W PA INPUT BD Q1101 BLF278 T1111P R1111 10K POT V L24 PA OUT PA OUT PA OUT L14 PA IN PA IN PA IN C1 1 0 C2 1 0 L18 GND GND GND PA IN GND AMPB DC PW...

Page 47: ...6 11 Reference Drawings RF Output Combiner...

Page 48: ...1215 01 C1214 01 D1201 1N6263 R1216 100K R1215 1K C1216 001 D1211 1N5263 R1218 1K R1214 200 0 5 W R1217 100K 1 2 3 4 5 HD1202 HEADER 5 R1216 100 14 3 3 3 3 LENGTH 0 7 0 6 GUAGE 17 12 12 12 12 0 6 0 5...

Page 49: ...6 13 Reference Drawings Backplane Distribution Note All bypass capacitors are 0 01 mf...

Page 50: ...6 14 FM1000A User s Manual Ribbon Cables and Connectors Ribbon Cables and Connectors...

Page 51: ...R156 4 3K R157 10K R158 OPEN U8D TL074 13 12 14 U26A MC33282 2 3 1 8 4 U26B MC33282 6 5 7 R146 1 0K R148 10K 1 C22 100PF R147 20K 1 R168 100 R167 OPEN R166 OPEN R165 100 R164 100 R163 OPEN R162 OPEN R...

Page 52: ...6 16 FM1000A User s Manual Notes...

Page 53: ...ort Section 7 Service and Support We understand that you may need various levels of support or that the product could require servicing at some point in time This section provides information for both...

Page 54: ...sheet page 7 5 and include it with your returned product 7 2 24 Hour Support In most instances what you need to know about your product can be found in this manual There are times when you may need m...

Page 55: ...al intended use Warranty repair can only be performed at our plant facility in Elkhart Indiana USA or at a factory authorized service depot Expenses in remedying the defect will be borne by Crown Broa...

Page 56: ...7 4 FM1000A User s Manual Notes...

Page 57: ...pping charges which we will reimburse We do not cover any charges for shipping outside the U S or any of the expenses involved in clearing customs If you have any questions about your Crown Broadcast...

Page 58: ...G 1 Glossary Glossary The following pages define terms and abbreviations used throughout this and other Crown Broadcast manuals A B C...

Page 59: ...emphasis also called Wideband carrier A continuous signal which is modulated with a second information carrying signal crosstalk In FM broadcasting this term generally refers to the interaction betwe...

Page 60: ...a Morse code rate Used in the on air identification of frequencies gain reduction The process of reducing the gain of a given ampli fier harmonics Undesirable energy at integral multiples of a desire...

Page 61: ...pectrum between audio fre quency and the infrared portion 2 A frequency useful for radio transmission roughly 10 kHz and 100 000 MHz SCA Subsidiary Communications Authorization see subcarrier S N Sign...

Page 62: ...mitter designed to internally change an FM signal from one frequency to another for retrans mission Used in conjunction with terrestrial fed networks satellator A transmitter equipped with an FSK ID o...

Page 63: ...E E E Efficiency 1 3 efficiency 1 2 exciter 1 2 F F F F F Fans 4 4 4 6 5 5 Fault Indicators 3 7 5 5 Frequency Range 1 3 Fuse Indicators 3 8 H H H H H Humidity Range 1 3 I I I I I In Ref 3 4 5 3 Input...

Page 64: ...e 1 3 RF output power 1 2 RF Power Output 1 3 RF power output 1 2 RU spaces 1 2 S S S S S S N Ratio 1 3 Safety 1 4 Schematics 6 3 Spurious Products 1 3 SWR 1 3 3 4 5 3 T T T T T Tot Current 5 4 transm...

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