WAYNE FLAGSTONE, INC. Model: LOKI FCC ID: LOKI-PA-5 Date: 07-01-99 Exhibit 4 WLI Project: 981530 EXHIBIT 4 As required by the following is a copy of the instruction manual.
1 2 Compact Series Power Amplifier 800MHz Compact Power Amplifier 1 introduction Eagle's 800MHz Power Amplifier is a compact, rack mountable and rated at 150W (CW) from B51 to 866MHz. It features LIMOS technology, microprocessor monitoring and power control. 2 Detail Description The amplifier unit is divided into two sections, power amplification and power control. The power amplification consists of a preamble and two main amp stages (See figure 1). There are protection fuses for both amp stages.
2 Compact Series Power Amplifier Power output and heat sink temperature is monitored to protect the amplifier. The microprocessor will automatically shut down the amplifier if the SWERVE exceeds the preset threshold level set in the software. The amplifier will also be shut down if the heat sink temperature reaches 70°C. When this occurs, the fan will continue to run and should the temperature drop to 50°C the processor will automatically re-enable the amplifier for full power.
2 Warranty Limited Warranty 1. The product line of paging and mobile equipment, base stations/power amplifiers, receivers, transmitters, security and transmitter control equipment sold by EAGLE WIRELESS INTERNATIONAL, INC. is warranted to the original buyer to meet the then current published specifications, drawings and/or such modifications thereof as Buyer and Seller have agreed to in writing and to be free from defects in workmanship and materials.
“9 EAGLE. Warranty 4. The Seller shall have the right of final determination as to the following: (a) existence of cause and defect, (b) whether adjustment will be allowed, and (c) if allowed, whether adjustment will be by repair or replacement. When adjustment is not allowed, a reasonable charge will be made to the Buyer to cover the Seller's cost of inspection and handling.
2 Preface Preface [Scope This system manual contains a high level description of the Compact Series Base Station as well as a detailed technical description. The scope of this document is to provide the reader with a general understanding of the system architecture and major features of the EWI Quantum Series ll of paging and link transmitters. Section 2 — Highlights the major features of the system. Section 3 — Provides a system overview with subsections outlining system technical configuration.
2 Preface states do not allow disclaimer or express or implied warranties in certain transactions; therefore, this statement may not apply in all instances. This publication may have technical inaccuracies or typographical errors, Therefore, the information contained in this manual is subject to change or revision. Changes or revisions will be incorporated in all new editions of the publication. EAGLE WIRELESS INTERNATIONAL, INC.
eA Preface All RF power transistor and RF termination resistors in this power amplifier contain the toxic substance beryllium oxide. These assemblies are located on the combiner, splutter and power amplifier boards. The fumes and dust of beryllium oxide is also toxic and should only be treated by trained personnel using proper precautions. Federal law and most state laws strictly prohibit disposal of beryllium oxide as a public waste. | FCC Requirements FCC regulations state that: 1.
2 Preface OSHA Safety Standards The United States Department of Labor, through the provisions of the Occupational Safety and Health Act, has established an electromagnetic energy safety standard with applies to the use of this equipment. Proper use of this radio equipment will result in exposure below the OSHA limit. The following precautions are recommended: DO NOT operate the transmitter of a fixed radio (base station, radio paging transmitter RF equipment) when someone is within two feet (0.
i Preface Care should be taken in handling the circuit boards during installation and service. A number of I's (Integrated Circuits) used in the equipment are from the MOS (Metal Oxide Semiconductor) family and are vulnerable to damage from static discharges. Exercise the following precautions when handling these components, Before handling components, ground yourself by touching a ground rod or the grounded chassis of the equipment momentarily.
Major System Features Section 2 — Major System Features Compact Series Base Station and Link Transmitter LINK | RECEIVER CONTROL CHASSIS POWER AMPLIFIER EXCITER POWER SUPPLIES 1 CABINET Version 3 2-1 02/04/89
2 Major System Features Major features of the Compact Series Base Station are: Version 3 * * Optional Analog and Digital Capability (High Speed) Advanced State-of-the-Art Technology 100% Solid State continuous Dutch High Stability Simulcast Compatibility Extensive Monitoring & Display Modular Design Multi-channel Capability* Modular Link Receivers Remote Monitoring & Status Reporting Capability” Analog & Digital Phase Delay Supports most popular transmitter controller formats through option packages 2-2 02/
2 System Configuration Section 3 —System Configuration Compact Series Base Station and Link Transmitter POWER LINK EE RECEIVER AMPLIFIER CONTROL CHASSIS Version 3 341 07/13/99
2 System Configuration Both paging and control link stations are structurally the same except in their modulation characteristics, their RF power output and the addition of hot standby features. The simulcast paging transmitter version is built with a very high stability oscillator for accurate simulcasting. A typical paging system block diagram using Quantum and Stealth Series transmitters and receivers is shown in Figure 4.
2 System Configuration In the Compact Series Base Station, the Link Receiver Unit processes all Control Link RF signals and prepares the audio signals for transmission to the transmitter unit. The audio input to the transmitter unit could, as an alternative, be provided by a satellite receiver, or a conventional wire line telephone circuit. If a phase delay board is utilized it will normally be mounted in the transmitter.
2 System Configuration produce the low-level RF. These units perform such functions as transmitter control, phase delay, basic RF signal generation, analog and digital signal interfaces, and display. The combined use of all of these function cards provides a very powerful and intelligent exciter/controller that give the Quantum and the Stealth Series its personality and features. The RF output of the transmitter exciter is used to drive a RF power amplifier housed in the back of the transmitter.
System Configuration Fans mounted to the cabinet provide forced air cooling. The number of fans may'vary according to RF power levels. The entry to the system is secured with a lock at the front and rear of the unit with three point contacts, 3.2.3 Specifications (Non-Redundant Configurations) Version 3 [13.2.
2 System Configuration [3.2.3b Receiver Module Frequency Range 72, VHF, UHF & 928-860 MHz Frequency Stability +0.0002% (-30°C to +60°C) Sensitivity 0.60uV, 12dB SIN AD; 1.8uV, 20dB quieting Audio Response +1 dB, 20-3000 Hz Audio Distortion 1.
2 Transmitter Unit Section 4B — Transmitter Unit Compact Series Base Station B.1 Transmitter Unit — General LINK {| RECEIVER La POWER SUPPLIES [CABINET AND RELATED FREQUENT The Eagle's Compact Series transmitter is a compact base station that is ideal for applications where space is a premium and a full size cabinet is not required. The transmitter unit is built around heat sink cooled by a high capacity cooling fan.
Transmitter Unit MICRO CONTROLLER ce CONTROLS} Rad “ADDRESS *— Ta — SHE LED DISPLAY me LY eel bn Tel os Ex are 4 Carib ANTENNA SYNTHESIZED Ss Fe» extremer POWER AMPLE FAIR eRe MICRO ; CONTROLLER i oer {PA CONTROL DIAGNOSTIC CONTROLLER) ‘+ Tv. CONTROLS res Figure 9. Compact Series Transmitter Unit Block Diagram Low-Pass Filter Exciter Pre. Amp Output Circulatory Couplet Fuse Board DC Input Main Amp Version 3 Figure 10.
2 Transmitter Unit Fan A Control Figure 11a. Rear View B.2 Transmitter Unit — General Circuit Description The transmitter control circuitry is contained on four separate plug-in circuit boards: PA Contradistinction Controller, Control D, Control A, and Phase Delay. These four boards plug into a back plane board that provides the necessary interconnections. These boards are interconnected in a manner to provide control of the transmitter. Their physical relationship is shown in Figure 10.
2 Transmitter Unit a. Variable DC control voltage that drives the per-amp to control the output power level of the PA. b. Bias supply generation for amplifier configurations that requires textual bias. ¢. Monitoring of forward power, reflected power, temperature, SWERVE conditions, DC power levels, and various alarm conditions. d. Fan control and sensing. e. DC power regulation. f. input power detection. g. PA key and DE-key. h. Front panel meter display.
2 Transmitter Unit to eliminate unwanted harmonics. The per-amp and main amp is fused on an independent basis. An LED indicator is located next to each fuse to provide easy visibility as to the health and status of the fuse for that circuit. B.2.4 Phase Delay Board The Phase Delay Board is also plugged into the back plane board in the transmitter unit and provides the time delay of the audio signal (ie.
2 Transmitter Unit B.3.2 Power Amplifier Control Board The Power Amplifier Control Board provides all of the Power Amplifier control functions necessary to operate any of the Eagle power amplifier configurations. INPUT RF CAL FWD PWR GAL RFL PWR CAL PWR ADJ HI SWERVE LED I FER Hm F Nl Figure 14. Power Amplifier Control Board The power amplifier control Functions are accomplished by the 87C552 master processor in conjunction with a variety of support circuitry.
2 Transmitter Unit The microprocessor, U1, on the power amplifier control board also provides the monitoring of the SWERVE using the forward and reflected power levels and will automatically shut the amplifier down if the SWERVE exceeds the threshold level set in the software. in addition, the microprocessor also continuously monitors the temperature of the heat sink near the high power final stage and will shut the amplifier down if this temperature reaches 70°C.
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2 Transmitter Unit B.3.3 Control D Board The Control A (digital) board provides the master control functions for the entire transmitter unit. This board is based on a 87C451 microprocessor (U1) that provides the computational power to monitor all incoming signals for control or data, respond to transmitter control requests, and to interface these signals with the Control A (analog) board for processing and sensing.
2 Transmitter Unit pagers require the data particular polarity with respect to the first sync bit. Jumper JP2 has been provided to allow either data polarity to be selected by simply moving the jumper to one or the other of its possible locations. It should also be noted that some jumpers may not require any shorting post for some configurations. One of the features of the Control A board is its ability to operate under a wide range of circumstances.
2 Transmitter Unit B.3.4 Control A Board The Control A (Analog) board is the only board in the control shelf that does not contain a microprocessor. This board is simply a collection of all of the analog functions required by the transmitter to accomplish its tasks. The Control A board is typically the first point in the transmitter that all audio (analog) signals are routed to. All incoming audio is transformer coupled (600 Ohm) on transformer T1.
? Transmitter Unit Adjusting RP1 sets the analog deviation while the digital deviation is set by R30. If an offset adjustment in the DC level of the digital data is required (normally not required) this is accomplished by R28. The other adjustments on the Control A board are associated with specific types of control formats and normally should not be attempted in the field without first consulting the factory for technical assistance.
2 Transmitter Unit next clocked through delay circuit US under the control of 87C451 microprocessor U1. The manner in which the total delay is implemented is ultimately controlled by gate array U7 which contains the proper firmware program to implement the proper sample rate and patter. The exact amount of delay time for the samples is determined by a bit patter that is read on sixteen port pins of the microprocessor. These sixteen bits are realized from two possible sources.
2 Transmitter Unit containing digital information only then would no additional filtering be required. However, if the signal contains mostly voice paging filtering may be desirable although the quality without filtering is excellent at these sample rates.
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2 Transmitter Unit B.3.6 Transmitter Unit Exciter The exciter module of the transmitters is produced in two different models. The standard model utilizes a synthesized signal source to produce a high quality signal output with data rates available up to 2400 baud. This model is appropriate for link transmitters, individual transmitters, and standard two level FSK simulcast systems.
2 Transmitter Unit POWER RE MODULE PER-AMPS VCO | POWER CONTROL FREQUENCY CONTROL CIRCUITRY REFERENCE _ KEY / FREQUENCY SELECT DATA POWER CONTROL Figure 24. Transmitter Unit Exciter Module Block Diagram B.3.7 Power Amplifier The power amplifier section of is available in all frequency bands and power levels ranging from 40 to 500 watts.
2 Transmitter Unit The output of the per-amp board is connected to the main amp. The main amp consists of a LIMOS transistor soldered fo a high thermal capacity circuit board/copper heat spreader assembly. This circuit board material is thermally bonded to a heavy-duty copper heat spreader for added thermal capacity. The heat sink is instrumented to allow the microprocessor on the Power Amplifier Control board to continually monitor the thermal performance of the unit.
oo Transmitter Unit LED Figure 29. Fuse Board Each of these fuse locations is instrumented with an LED to provide a quick visual indication of the health and status of that particular fuse. Most importantly, in the entire Power Amplifier section of the transmitter, there are no inert requiring adjustment or tuning. Version 3 .
