Instruction/ maintenance manual of the product FM1000A Crown Audio
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i FM1000A RF Amplifier Package User's Manual ©200 5 Crown Broadcast, a division of International Radio and Electronics, Inc. 25166 Leer Drive, Elkhart, Indiana, 46514-5425 U.
ii Revision Control Revision Print Date Initial Release (Rev . 0) 900413-1 November 1998 Revision 1 April 2002 Important Notices ©200 5 , Crown Broadcast, a division of International Radio and Electronics, Inc.
iii Contents Contents Contents Contents Contents Section 1—Getting Acquainted 1.1 Y our Amplifier Package ....................................................................................... 1–2 1.2 Amplifier Package Specifications ............
iv 4.2 PS1000 Power Supply ...................................................................................... 4–4 4.2.1 AC Input Board ............................................................................................. 4–5 4.2.2 PFC (Power Factor Correcting) Switching Board .
Getting Acquainted 1–1 I INFORMATION Section 1—Getting 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 install- ing or operating the amplifier and power supply.
FM1000A User’ s Manual I 1–2 1.1 Y our Amplifier Package The FM1000A is a highly efficient amplifier package designed to set a new standard in FM transmitter design offering modularity, ease of use, and long-term reliabil- ity. The FM1000A package includes a PA1000 amplifier, PS1000 power supply, and an FM1K accessory pack.
Getting Acquainted 1–3 1.2 Amplifier Package Specifications RF Power Output : 100 to 1100 watts continuous with remote controlled power adjust RF Drive Requirement : 30 watts for full output RF Output Impedance: 50 ohms (unbalanced) Maximum SWR: 1.
FM1000A User’ s Manual I 1–4 1.3 Safety Considerations Crown Broadcast assumes the responsibility for providing you a safe product and safety guidelines during its use. “Safety” means protection to all individuals who install, operate, and service the transmitter as well as protection of the transmitter itself.
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.
2–2 FM1000A User’ s Manual 2.1 Operating Environment You can install the FM1000A amplifier system in a standard 19–inch component rack or on a suitable surface such as a bench or desk. In any case, the area should be as clean and well-ventillated as possible.
2–3 Installation 2.4 Preinstallation 2.4.1 Power Amplifier Modules The PA1000 incorporates four power amplifiers (two each in two modules). Due to possible damage during shipment, the power modules have been removed. Follow these steps to install the modules: 1.
2–4 FM1000A User’ s Manual W ARNING 2.4.2 Hubble T wist Lock® Connector Wiring Prepare the wiring for the Hubble Twist-Lock® connector in the following manner before connecting to your AC power source: 1. Use round cord with a diameter of 0.385–0.
2–5 Installation 2.5 Installation 1. Mount the units in an appropriate 19–inch wide cabinet. The power supply must be installed directly below the power amplifier for the included cables to reach their respective connectors (see illustration 2–4 below).
2–6 FM1000A User’ s Manual 2.6 Remote I/O Connection LOCAL MAXIMUM +5V LOCAL POWER ADJUST MINIMUM REMOTE T ANSMITTER CONTROL SW3 RAISE SW4 LOWER SW5 R62 Electro- Control Circuit REMOTE RAISE POWER Pin 4 Remote I/O Conn. REMOTE LOWER POWER Pin 15 Remote I/O Conn.
2–7 Installation For remote I/O (Input/Output) connection, connect your remote I/O cable from your remote control location to the 25–pin (female) D-sub connector on the back panel of the PA1000.
2–8 FM1000A User’ s Manual Remote I/O Connector Pinout T able Pin # Function 1 P A#8 Current Monitor (a buff ered metering output with 1 V = 2 A) 2 P A#7 Current Monitor (a buff ered metering output with 1 V = 2 A) 3 Ground 4 Remote RAISE P ower (a momentary s witch, on this pin, when held low will raise the po wer le vel 10 w atts e very 0.
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 .
3–2 FM1000A User’ s Manual These steps summarize the operating procedures you should use for the initial operation of the power amplifier and power supply. More detailed information follows. 1. Ensure that the external remote control unit is properly connected (See the Pin Out Description Table, Section 2.
3–3 Operation Illustration 3–3 PS1000 Front Panel Functions 8. Check the PA1000 parameters with the Digital Multimeter for a current (Tot Current) of 20 to 30 amps and a voltage (PA Voltage) of 25 to 35 volts. If parameters are within range, increase the Local Power Adjust to the maxi- 6.
3–4 FM1000A User’ s Manual 3.2.1 AC Input Circuit Breaker The PS1000 supplies power to the PA1000 by converting single-phase 220/240 VAC into 50 VDC. The PS1000 is protected by a 20 A, double-pole circuit breaker located on the rear panel. This AC input circuit breaker must be in the “up” position (as shown below) for operation.
3–5 Operation 3.2.2 DC Power Switch The main on/off power switch located on the front panel of the power supply controls high voltage output. (The control circuit activates this voltage.
3–6 FM1000A User’ s Manual 3.3 Digital Multimeter Illustration 3–7 Digital Multimeter The 3–digit numeric display in the upper left corner of the front panel provides information on the amplifier’s operation. Use the “up” and “down” push-buttons to select one of the following parameters as indicated by a green LED.
3–7 Operation 3.4 Fault Indicators Illustration 3–8 Fault Indicators CAUTION Possible equipment damage! Do not exceed 40 watts of input drive. Damage to the PA1000 will result if this level is exceeded. Faults are indicated by illuminated red LED’s when the following occurs: Antenna —Load SWR exceeds 1.
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.
4–1 Principles of Operation i n q u e s t o m o n do, e r o n o d u e p e r s o n e c h e a b b i a n o f o r s e , u n o s i d i ce c h e n o n h a l a d i s p o z i o n e d o f a r l o .
i n q u e s t o m o n d o , f o r s e , u n o s i d i c e s e d i c i a m o c h e m a s c r i v e n d o c o n i n q u e s t o m o n d o , f o r s e , u n o s i d i c e s e d i c i a m o c h e m a s c .
4–3 Principles of Operation 4.1.3 Backplane Assembly The backplane assembly is located in the vertical center of the PA1000 behind the power modules.
i n q u e s t o m o n d o , f o r s e , u n o s i d i c e s e d i c i a m o c h e m a s c r i v e n d o c o n i n q u e s t o m o n d o , f o r s e , u n o s i d i c e s e d i c i a m o c h e m a s c .
4–5 Principles of Operation 4.2.1 AC I nput Board The AC Input Board is located on the left side of the PS1000. AC power from the circuit breaker connects to the AC Input Board where it connects to a ±12 volt DC power supply and three relays.
i n q u e s t o m o n d o , f o r s e , u n o s i d i c e s e d i c i a m o c h e m a s c r i v e n d o c o n i n q u e s t o m o n d o , f o r s e , u n o s i d i c e s e d i c i a m o c h e m a s c .
5–1 T roubleshooting TROUBLE TROUBLE TROUBLE Section 5—T roubleshooting This section describes procedures for service personnel to diag- nose and troubleshoot potential fault conditions in the power amplifier and power supply .
TROUBLE TROUBLE TROUBLE 5–2 FM1000A User’ s Manual 5.1 T roubleshooting Flow Chart Analysis Does y our amplif ier have output power? Yes No Is pow er output at the proper level? Yes No See S ect ion 3.1 Ini t ial Pow er-up procedures. Do you have power now ? Yes No Is y our e xcite r turned on? Secu re al l con nec tions to the PS 2000.
5–3 T roubleshooting W W ARNING ARNING 5.2 Digital Multimeter Parameters The following procedures are general in nature; for in-depth service, and repair see the Service & Support section of this manual. Lethal voltages present! Only technically qualified individuals shoud attempt troubleshooting or service procedures .
TROUBLE TROUBLE TROUBLE 5–4 FM1000A User’ s Manual 5.2.5 P A T em p The meter should read between 35–50°C with an ambient temperature of 25°C. If temperature is 75°C or above, then check and do the following: ❑ Ambient temperature higher than 50°C; reduce temperature.
5–5 T roubleshooting If one of the LED fault indicators is illuminated red, troubleshoot using the follow- ing suggestions: 5.3 Fault Indicators 5.3.1 Antenna Antenna mismatch. ❑ Effects from inclement weather conditions such as icing. ❑ Check for moisture in the feedline.
TROUBLE TROUBLE TROUBLE 5–6 FM1000A User’ s Manual 5.3.5 Multiple Indicators Call your Crown Broadcast service representative. See Section 7, Service and Support, for contact information. a. The circuit breaker is located on the rear panel of the power supply.
6–1 Reference Drawings 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 and power supply .
6–2 FM1000A User’ s Manual Illustration 6–1 Front View 240 V A C IN RF Input Remote I/O Control RF Monitor (Optional Connection) RF Output Circuit Breakers + DC Input DC Input + DC Output DC Output PS1000 P A1000 Air Intakes/Filters Ground Screws Fans Power Control Air Exhaust V ents OFF OFF Illustration 6–2 Back View 6.
6–3 Reference Drawings Illustration 6–3 FM1000A Block Diagram 30 W Exciter (Crown FM30) P A1000 Power Amplifier 1 kW RF Power Output Remote I/O Connector Power Supply Control 0–50 VDC P A Supply PS1000 Power Supply RF Input Excitation 240 V AC 50/60 Hz Input Power Single Phase 6.
6–4 FM1000A User’ s Manual Illustration 6–4 PS1000 Block Diagram 240 V A C AC CIRCUIT BREAKER AC INPUT NEUTRAL GROUND AC INPUT CCA POWER SWITCH RECTIFIER PFC & CONTROL CCA DC OUTPUT CCA + 0 .
6–8 FM1000A User’ s Manual Illustration 6–5 P A1000 Block Diagram.
6–13 Reference Drawings Backplane Distribution Note: All bypass capacitors are 0.01 mf.
6–14 FM1000A User's Manual Ribbon Cables and Connectors Ribbon Cables and Connector s.
6–16 FM1000A User's Manual Notes:.
7–1 Service and Support Section 7—Ser vice and Support W e understand that you may need various levels of support or that the product could require servicing at some point in time.
7– 2 FM1000 A User's Manual 7.1 Service The product warranty (see opposite page) outlines our responsibility for defective products. Before returning a product for repair or replacement (our ch.
Service and support 7 – 3 Crown Broadcast Three Year Limited Product Warranty SUMMARY OF WARRANTY Crown Broadcast, IREC warrants its broadcast products to the ORIGINAL PURCHASER of a NEW Crown Broadcast product, for a period of three (3) years after shipment from Crown Broadcast.
7– 4 FM1000 A User's Manual Notes:.
7–5 Service and Support To obtain factory service, complete the bottom half of this page, include it with the unit, and ship to: International Radio and Electronics Company, Inc.
G–1 Glossary Glossar y The following pages define terms and abbreviations used throughout this and other Crown Broadcast manuals. A B C.
G– 2 FM 10 00 A User's Manual A B C AF Audio Frequency; the frequencies between 20 Hz and 20 kHz in the electromagnetic spectrum. ALC Automatic Level Control AM Amplitude Modulation; the process of impressing information on a radio-frequency signal by varying its amplitude.
G–3 Glossary exciter (1) A circuit that supplies the initial oscillator used in the driver stage. (2) A transmitter configuration which excludes stereo generation and audio processing.
G– 4 FM 10 00 A User's Manual A B C PA I Power Amplifier Current PA V Power Amplifier Voltage pilot A 19–kHz signal used for stereo transmissions. pre-emphasis The deliberate accentuation of the higher audio frequencies; made possible by a high-pass filter .
G–5 Glossary SWR Standing-Wave Ratio; on a transmission line, the ratio of the maximum voltage to the minimum voltage or maximum current to the minimum current; also the ratio of load impedance to in- tended (50 ohms) load impedance.
Index-i Index A A A A A AC Input Board 4–5 AC Power 1–3 AC power 2–4 ALC 3–4, 5–3 Antenna 3–7 mismatch 5–5 antenna 2–5 B B B B B Backplane Assembly 4–3 Backplane DC Interconnect Boar.
Index-ii R R R R R remote I/O 2–7 RF Drive Requirement 1–3 RF Harmonics 1–3 RF Output Impedance 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 .
An important point after buying a device Crown Audio FM1000A (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Crown Audio FM1000A yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Crown Audio FM1000A - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Crown Audio FM1000A you will learn all the available features of the product, as well as information on its operation. The information that you get Crown Audio FM1000A will certainly help you make a decision on the purchase.
If you already are a holder of Crown Audio FM1000A, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Crown Audio FM1000A.
However, one of the most important roles played by the user manual is to help in solving problems with Crown Audio FM1000A. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Crown Audio FM1000A along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
