Codan Radio Communications UT-4-400 UT-4x400 UHF Transmitter User Manual IM23D UT4400AMP 1 UHF Ampli
Codan Radio Communications UT-4x400 UHF Transmitter IM23D UT4400AMP 1 UHF Ampli
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| Date Available | 2000-11-06 00:00:00 |
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| Document Title | IM23D-UT4400AMP-1 UHF Ampli.PDF |
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MT-3/MT-4 RADIO SYSTEMS UHF AMPLIFIER INSTRUCTION MANUAL UT-3 / UT-4 406 - 470 MHz Covers models: UT-3/400 Amplifier UT-4/400 Amplifier Copyright © 1998 Daniels Electronics Ltd. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior written consent of Daniels Electronics Ltd. DE™ is a registered trademark of Daniels Electronic Ltd. registered in the United States Patent and Trademark Office. Issue: Peliminary Previous Issue: N/A Issue Date: October 98 Previous Issue Date: N/A Printing Date: October 98 Part No.: IM23D-UT34400AMP Daniels Electronics Ltd. Victoria, B.C. PRINTED IN CANADA Reviewed By: Quality Assurance: Larry Freeman Name Signature _________________ Date NOTE: The user's authority to operate this equipment could be revoked through any changes or modifications not expressly approved by Daniels Electronics Ltd. The design of this equipment is subject to change due to continuous development. This equipment may incorporate minor changes in detail from the information contained in this manual. DANIELS DEELECTRONICS ii UHF Amplifier Instruction Manual UT-3 406 - 512 MHz TABLE OF CONTENTS Page GENERAL....................................................................................... 1-1 1.1 Introduction............................................................................. 1-1 1.2 Performance Specification ............................................................ 1-1 THEORY OF OPERATION................................................................... 2-1 2.1 Amplifier Operation.................................................................... 2-1 2.2 Power Requirements................................................................... 2-2 2.3 RF Circuitry ............................................................................ 2-2 2.3.1 UT-3/400 Lowpass Filter .................................................... 2-2 2.4 Power Control Circuitry............................................................... 2-3 2.5 Power Sensing Circuitry .............................................................. 2-3 2.5.1 Output Power Sense .......................................................... 2-3 2.5.2 VSWR Sense .................................................................. 2-4 2.5.3 VSWR Overload .............................................................. 2-4 UT-3/400 AMPLIFIER ALIGNMENT ...................................................... 3-1 3.1 General.................................................................................. 3-1 3.2 Repair Note ............................................................................. 3-1 3.3 Recommended Test Equipment List ................................................. 3-1 3.4 Printed Circuitboard Numbering Convention....................................... 3-2 3.5 Standard Factory Settings and Jumper Configuration............................. 3-2 3.6 UT-3/400 Amplifier Alignment....................................................... 3-2 3.6.1 General......................................................................... 3-2 3.6.2 UT-3/400 Amplifier Adjustment ............................................ 3-3 3.6.2.1 General Set-Up....................................................... 3-3 3.6.2.2 Output Power Alarm (Forward Power) ........................... 3-4 3.6.2.3 Output Power ......................................................... 3-5 3.6.2.4 Antenna VSWR Alarm (Reverse Power).......................... 3-5 3.6.2.5 Antenna VSWR Overload........................................... 3-6 3.6.2.6 Procedure Verification............................................... 3-6 ILLUSTRATIONS AND SCHEMATIC DIAGRAMS .................................... 4-1 4.1 UT-3/400 UHF Amplifier Component Layout..................................... 4-2 4.2 UT-3/400 UHF Amplifier Schematic Diagram ..................................... 4-3 4.3 UT-3/400 UHF Lowpass Filter Component Layout............................... 4-5 4.4 UT-3/400 UHF Lowpass Filter Schematic Diagram............................... 4-5 DANIELS DEELECTRONICS UHF Amplifier Instruction Manual UT-3/UT-4 406 - 512 MHz iii 5 PARTS LISTS...................................................................................5-1 5.1 UT-4/400 UHF Amplifier Electrical Parts List......................................5-1 5.2 UT-4/400 UHF Amplifier Mechanical Parts List ...................................5-4 5.3 UT-3/400 UHF Low Pass Filter Electrical Parts List ..............................5-4 REVISION HISTORY..........................................................................6-1 DANIELS DEELECTRONICS iv UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 1 GENERAL 1.1 Introduction The UT-3/400 Amplifier provides the final stage of RF amplification and filtering for the entire UHF Transmitter UT-3 406 -512 MHz family. The amplifier has four distinct frequency ranges: 406 to 430 MHz, 450 to 470 MHz, 470 to 490 MHz and 490 to 512 MHz as well as two distinct output power ranges: 0.5 to 2.0 Watts and 2.0 to 8.0 Watts. The UT-3/400 Amplifier is housed in a machined aluminum case that ensures optimum RF shielding, provides a good ground, and also acts as a heatsink. Additionally, the UT-3/400 Amplifier is equipped with output power and VSWR sensing lines which can be individually configured as open collector or linear outputs. The internal VSWR sensor protects the amplifier from high antenna VSWR by approximately halving the amplifier's RF gain when a VSWR overload condition is present. Output filtering for the UT-3/400 Amplifier is provided by the UT-3/400 Lowpass Filter Board. The lowpass filter assembly is mounted in a separate compartment of the amplifier case in order to provided maximum attenuation of harmonic and other spurious signals. Refer to Section 4 for the UT-3 406 - 512 MHz UHF amplifier and lowpass filter component layouts and schematic diagrams 1.2 Performance Specification Type: MT-3 series UHF Amplifier module. Compatibility: MT-3 series Transmitter Main Board. Frequency Range: 406 to 430 MHz, 450 to 470 MHz, 470 to 490 MHz or 490 to 512 MHz. RF Power Output: adjustable 0.5 to 2.0 Watts or 2.0 to 8.0 Watts RF power Input: nominal level adjustable from +4 dBm to +10 dBm, held within +/- 2 dB of nominal. Ouput Impedance and VSWR:50 Ω, Type N connector; 3:1 max. VSWR. Input /Output Isolation: > 60 dB Duty Cycle: 100%: Continuous operation from -40˚ C to +60˚C. DANIELS DEELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 1-1 Harmonic Emissions: Less than -80 dBc . Transmitter Mismatch Protection: 20:1 VSWR at all phase angles. Transmitter Alarm: Forward power sense and reverse VSWR; - open collector output (separate or 'OR'ed configuration); -linear output (separate lines only). Operating Temperature Range: -30˚ C to +60˚ C, optional -40˚ C temperature test. Operating Humidity: 95% RH (non-condensing) at +25˚ C. Operating Voltage: +13.8 Vdc Nominal (range +11 to +16 Vdc), +9.5 Vdc Regulated. Transmit Current: 0.7 Amp typical; 1.1 Amp maximum Amplifier Standby Current: less than 0.5 mA. Amplifier Enable: Active to ground. Amplifier Enable Response: typically overdamped, rising to within 90% of full power within 5 msec; maximum (underdamped) overshoot of 30%. DANIELS DEELECTRONICS 1-2 UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 2 THEORY OF OPERATION 2.1 Amplifier Operation The operation of the UT-3/400 Amplifier varies slightly according to whether the amplifier is a low power (0.5-2.0 W) or a high power (2.0-8.0 W) version. The low power amplifier does not use transistor Q1 to boost the output power; consequently, it does not require the +13.8 Vdc supply. In both versions the power control circuitry monitors the RF output power of amplifier U4 and keeps the power constant. Therefore, the output power from the high power amplifier will change as the unregulated +13.8 Vdc supply varies. Note that the frequency band does not change how the amplifier operates; it only changes a few component values in the RF circuitry. Power for the UT-3/400 Amplifier is provided from the MT-3 Transmitter Board. The +13.8 Vdc supply (if required) is continuously connected to the amplifier; whereas, the +9.5 Vdc supply is always switched by the transmitter's PTT circuitry. The UT-3/400 Amplifier will not consume any power from the +13.8 Vdc supply until +9.5 Vdc is switched on for the amplifier's circuitry and an RF input signal is present. The synthesizer or crystal control module controls the +9.5 Vdc to the amplifier's circuitry; switching it on by grounding the amplifier's input enable line. The synthesizer will ground the input enable line only when the synthesizer's RF signal is phase locked. This prevents unwanted spurious emissions during transmitter start-up. A typical start-up sequence is listed below: 1) 2) 3) 4) 5) 6) +13.8 Vdc is always present the transmitter is keyed on +9.5 Vdc is switched on by the PTT circuitry and the synthesizer or crystal control module PTT line is pulled low an RF signal is output to the amplifier the amplifier's input enable line is activated the amplifier outputs RF power DANIELS DEELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 2-1 2.2 Power Requirements Typical current requirements for the UT-3/400 Amplifier at different power levels are given in the Table 2-1 below. The current drawn from the +9.5 Vdc supply should never exceed 1.2 Amps and the current drawn from the +13.8 Vdc supply should never exceed 1.5 Amps. Table 2-1 UT-3/400 Amplifier Current Consumption 0.5 to 2.0 Watt Amplifier Output +9.5 Vdc Power Supply Current 0.5 W 0.65 A 1.0 W 0.87 A 1.5 W 1.02 A 2.0 W 1.17 A 2.0 to 8.0 Watt Amplifier Output +9.5 Vdc Power Supply Current 2.0 W 0.64 A 4.0 W 0.79 A 6.0 W 0.89 A 8.0 W 1.04 A +13.8 Vdc Supply Current 0.51 A 0.75 A 0.93 A 1.10 A Note: Current consumption measured at 470 MHz 2.3 RF Circuitry The RF circuitry consists of several blocks: a 5 dB input pad (R1, R2, and R3), an RF amplifier module (U4), an output power boosting transistor (Q1), three directional couplers (TL1, TL3, and TL4), and the UT-3/400 Lowpass Filter. The heart of the UT-3/400 Amplifier is RF amplifier module U4. This module amplifies a 1 mW signal up to a maximum of 2.0 W, at the antenna connector, for a low power unit. In high power units, the output of U4 is further amplified by Q1 to a maximum of 8.0 Watts at the antenna connector. Capacitors C17 and C24 provide tuning for transistor Q1's input and output match. Although the input match and the output match for Q1 are tunable, the networks have been made broadband so that the high power amplifiers will operate over the same frequency range as the low power amplifiers. The frequency band of the UT-3/400 Amplifier is determined by the operating frequency range of the RF amplifier module U4. Directional couplers (TL1, TL3, and TL4) are used to sample forward and reverse power. The sampled power is used by the sensing and power control circuits to control the amplifier's operation. The final step in the RF path is output filtering and, as mentioned earlier, this is done by the UT-3/400 Lowpass Filter. 2.3.1 UT-3/400 Lowpass Filter The UT-3/400 Lowpass Filter is a 50 ohm, 9 pole, reciprocal filter with a 3 dB cutoff frequency of approximately 512 MHz. The lowpass filter assembly attenuates the desired signal's harmonics as well as any other out-of-band emissions so that a 'clean' RF signal is output to the antenna connector. DANIELS DEELECTRONICS 2-2 UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 2.4 Power Control Circuitry The UT-3/400 Amplifier employs a closed loop power control which uses a sample of the forward RF power to control the gain of RF amplifier U4. Op-amp U1b compares the sampled RF voltage to the output power setpoint and generates an error signal which Q3 uses to control the voltage on U4's gain control pin. The output power setpoint is determined by R7, the Output Power Adjust potentiometer. In low power amplifiers jumper JU5 is installed and the forward power is sampled by TL3, D6, C27, R18, L11, R19, and C28. In high power amplifiers jumper JU5 is not installed and the forward power is sampled by TL1, D5, C14, R13, L6, R12, and C15. In both high power and low power amplifiers, the power control circuitry keeps the output power of U4 constant. Therefore, in high power amplifiers, the amplifier's output power will fluctuate with variations in the +13.8 Vdc supply voltage. 2.5 Power Sensing Circuitry The UT-3/400 Amplifier is equipped with output power and VSWR sensing lines which can be individually configured as open collector or linear outputs. In open collector configuration, the output is active low, that is, when a fail condition is detected (not enough output power or too high antenna VSWR) the open collector transistor is turned on. In linear configuration, a voltage proportional to the sensed output power or antenna VSWR is output. Both the Output Power Alarm setpoint and the VSWR Alarm setpoint are individually adjustable; however, the Output Power Alarm setpoint must always be adjusted before the VSWR Alarm setpoint. This is because the Output Power Alarm setpoint is used as a reference by the VSWR Alarm circuitry. 2.5.1 Output Power Sense The output power sense circuitry uses directional coupler TL3 to sample some of the forward power. The sampled power is rectified by diode D6 and capacitor C27 and then amplified by op-amp U3b. Op-amp U3b's amplification is controlled by R21, the output power alarm adjust potentiometer. The amplified voltage is then output directly in linear operation (JU1 installed, JU2 not installed) or compared to +6.3 Vdc by op-amp U1a which then drives transistors Q5 and Q6 for open collector operation (JU1 not installed, JU2 installed). In open collector configuration, Q6 (the open collector output transistor) is turned on when an alarm condition occurs. The adjustment range for the output power alarm can vary depending on the setting of R21 (the Output Power Alarm Adjust potentiometer). DANIELS DEELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 2-3 2.5.2 VSWR Sense The VSWR sense circuitry uses directional coupler TL4 to sample some of the power reflected from the antenna terminal. The reflected power is rectified by diode D7 and capacitor C33 and then amplified by op-amp U2b. Op-amp U2b's amplification is controlled by R36, the VSWR Alarm Adjust potentiometer. The amplified voltage is then output directly in linear operation (JU4 installed, JU3 not installed) or compared to the output power alarm setpoint by op-amp U3a which then drives transistor Q7 for open collector operation (JU4 not installed, JU3 installed). In open collector configuration, Q7 (the open collector output transistor) is turned on when an alarm condition occurs. The adjustment range for the VSWR Alarm can depending on the setting of R36 (the VSWR Alarm Adjust potentiometer). 2.5.3 VSWR Overload The VSWR overload circuit protects the UT-3/400 Amplifier from excessive antenna VSWR by reducing the amplifier's gain (output power) when an overload condition occurs. The VSWR overload circuit (R38 to R41, R8, U2a, and Q4) is an extension of the VSWR sense circuit and operates the same as the VSWR sense open collector circuit. The VSWR Overload Adjust potentiometer (R38) reduces the voltage level of the VSWR Alarm Setpoint. The voltage set by R38 is the compared to the output power alarm setpoint by op-amp U2a which then drives transistor Q4. When transistor Q4 turns on, signaling an overload condition, resistor R8 is grounded which reduces the output power setpoint. Reducing the output power setpoint lowers the UT-3/400 Amplifier's gain and protects the amplifiers from excessive current draw resulting from high antenna VSWR. The VSWR overload circuit's range of adjustment depends on the setting of the VSWR Alarm Adjust potentiometer (R36). The VSWR overload transistor Q4 can be activated at the same point at which the VSWR alarm becomes active or the VSWR overload circuit can be disabled by turning R38 completely counterclockwise. DANIELS DEELECTRONICS 2-4 UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 3 UT-3/400 AMPLIFIER ALIGNMENT 3.1 General Connections to the power supply, alarm and transmit enable lines (ENA), are clearly marked on the amplifier case. The amplifier is enabled when the enable line (ENA) is grounded. If the amplifier is installed in the transmitter, alignment is simplified by using an SR-3 Subrack, SM-3 System Monitor, and RF extender cable to provide transmitter power and signal interconnection (see the Transmitter Main Board Manual for details). For complete transmitter alignment, the Transmitter Main Board, Synthesizer, Amplifier, and Audio Processor should be tuned in the aforementioned order. Please refer the corresponding manuals for each module. If the input RF level is not changed, adjustments to the output power and alarm thresholds may be made without removing the amplifier cover. However, in the case of a complete amplifier alignment, the amplifier should be separated from the Transmitter Main Board and the amplifier cover removed to expose all amplifier circuitry. All jumpers and test points are clearly marked. 3.2 Repair Note The UT-3/400 Transmitter is mainly made up of surface mount devices which should not be removed or replaced using an ordinary soldering iron. Removal and replacement of surface mount components should be performed only with specifically designed surface mount rework and repair stations complete with ElectroStatic Dissipative (ESD) protection. When removing Surface Mount Solder Jumpers, it is recommended to use solder braid in place of manual vacuum type desoldering tools when removing jumpers. This will help prevent damage to the circuitboards. 3.3 Recommended Test Equipment List Alignment of the transmitter requires the following test equipment or its equivalent. Dual Power Supply: Oscilloscope / Multimeter: Current Meter: Radio communications test set : VSWR 3:1 mismatch load: coaxial test cable set Alignment Tool: Regulated +9.5 Vdc at 0.1 A. Regulated +13.8 Vdc at 2 A - Topward TPS-4000 Fluke 97 Scopemeter Fluke 75 multimeter Marconi Instruments 2955R JFW 50T-035-3.0:1 three 50 Ω cables of incremental length 20 to 40 cm Johanson 4192 DANIELS DEELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 3-1 It is recommended that the radio communications test set be frequency locked to an external reference (WWVH, GPS, Loran C) so that the high stability oscillator may be accurately set to within its ±1 ppm frequency tolerance. 3.4 Printed Circuitboard Numbering Convention To ease troubleshooting and maintenance procedures, Daniels Electronics Limited has adopted a printed circuitboard (PCB) numbering convention in which the last two digits of the circuitboard number represent the circuitboard version. For example: • PCB number 43-912010 indicates circuitboard version 1.0; • PCB number 50002-02 indicates circuitboard version 2.0. All PCB's manufactured by Daniels Electronics are identified by one of the above conventions. 3.5 Standard Factory Settings and Jumper Configuration The UT-3/400 Amplifier is factory configured as follows: • Open collector configuration for Output Power Alarm (3 dB drop). • Open collector configuration for Antenna VSWR Alarm (VSWR ≥ 3:1). • Output power of 2 Watts or 6 Watts for low and high power amplifiers respectively. The corresponding jumper settings are: • Jumper JU1: not installed • Jumper JU2: installed • Jumper JU3: installed • Jumper JU4: not installed • Jumper JU5: installed • Jumper JU5: not installed 3.6 Output power alarm - linear output Output power alarm - open collector output Antenna VSWR alarm - open collector output Antenna VSWR alarm - linear output Low power (2 W) transmitters High power (8 W) transmitters UT-3/400 Amplifier Alignment 3.6.1 General The UT-3/400 Amplifier is a frequency sensitive module that is factory assembled to operate in one of four frequency bands: 406 to 430 MHz, 450 to 470 MHz, 470 to 490 MHz or 490 to 512 MHz. The amplifier is available in a low power version, 0.5 to 2.0 Watts output power, and a high power version, 2.0 to 8.0 Watts output power. Both amplifier versions require 5 dBm of input power and in both versions the amplifiers output power is continuously adjustable over the its respective power range. The UT-3/400 Amplifier provides Output Power and Antenna VSWR Alarm outputs which can be configured for open collector output or linear operation. The DANIELS DEELECTRONICS 3-2 UHF Amplifier Instruction Manual UT-3 406 - 512 MHz amplifier's output power level, alarm levels, and tuning for the transistor matching circuit in the high power version can be set without detaching the amplifier from the transmitter board. However, if the output power alarm or the Antenna VSWR alarm output configuration requires changing, the UT-3/400 Amplifier must be detached from the MT-3 Transmitter Board. Refer to section 4 page 2 "UT-3/400 Amplifier Component Layout" for the location of solder jumpers JU1 to JU5. 3.6.2 UT-3/400 Amplifier Adjustment The Amplifier alignment consists of two adjustment procedures; (i) a general set up (section 3.6.2.1) procedure which sets up the proper bias conditions for the RF transistors and (ii) the RF threshold adjustments which set up the desired alarm threshold levels as well as the RF output power. The general alignment procedure is required following major repair operations, changes in RF input levels or large changes in operating frequency (greater than ± 1.0 MHz). The RF output and alarm threshold level adjustments are more easily accessible so that fine adjustments can be made in the field. Depending on user requirements, the RF alarm threshold levels should be checked whenever a significant change in operating frequency (± 0.5 MHz) is made. As the antenna VSWR alarm is dependent on the output power alarm, the output power alarm should always be set first. The order of adjustment should be: The adjustment procedures for the high power and the low power version amplifiers are identical after the matching for transistor Q1 is tuned in the high power version. As the antenna VSWR alarm is dependent on the output power alarm, the output power alarm should always be set first. The order of adjustment should be: 1) High Power Amplifiers Only — Tune the transistor matching circuit at the desired frequency and power. Set the desired output power alarm level (section 3.6.2.2). Set the desired output power level (section 3.6.2.3). Set the desired Antenna VSWR alarm level (section 3.6.2.4). Set the desired overload condition level (section 3.6.2.5). 2) 3) 4) 5) Details for the preceding four steps are outlined below. 3.6.2.1 General Set-Up Connect the transmitter's antenna output connector to the type N input of the radio communications test set through a short section of low loss 50 Ω coaxial cable. Turn all four (4) of the adjustment potentiometers (R7, R21, R36, and R38) fully counterclockwise. DANIELS DEELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 3-3 3 Turn on the power to the transmitter. For high power amplifier units, follow steps 5 to 7 below. For low power amplifiers, skip to the Output Power Alarm procedure. Tune the output matching capacitor for maximum output power. approximately 8 Watts. For single frequency applications, tune the input matching capacitor so that +9.5 Vdc current is minimized without sacrificing output power. For wideband applications it is best to tune the amplifier at the highest frequency in the band of interest and then tune the input matching capacitor so that the +9.5 Vdc current never exceeds 1.2 amps over the desired frequency band. For single frequency applications, re-peak the output matching capacitor. For wideband applications it is best to tune the amplifier at the highest frequency in the band of interest and then re-peak the output matching capacitor so that the +13.8 Vdc current never exceeds 1.5 amps over the desired frequency band. 3.6.2.2 This should be Output Power Alarm (Forward Power) Open Collector Output * note: the output power alarm output is factory configured as an open collector output so a pull-up resistor may be required on transmitter pin B26 if one is not already present. Adjust R7, the output power adjustment, to the output power at which the Output Power Alarm is to be activated. Monitor transmitter pin B26, the Output Power Alarm line, and slowly turn R21, the output power alarm adjustment, clockwise until pin B26 goes low. The alarm is now set for the current output power of the transmitter. Linear Output Open the amplifier case to disable (open circuit) jumper JU2 and enable (short) jumper JU1. Monitor transmitter pin B26 with a voltmeter. Adjust R7, the output power adjustment, for full transmitter output power. DANIELS DEELECTRONICS 3-4 UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 4 Adjust R21, the output power alarm adjustment, so that the voltmeter indicates +7.5 Vdc for full transmitter output power. Turn R7, the output power adjustment, fully counterclockwise. The voltmeter should read approximately +3 Vdc. Disconnect the voltmeter. 3.6.2.3 Output Power Turn R7, the output power adjustment, clockwise to the desired transmitter output power. 3.6.2.4 Antenna VSWR Alarm (Reverse Power) Open Collector Output * note: the antenna VSWR alarm output is factory configured as an open collector output so a pull-up resistor may be required on transmitter pin Z26 if one is not already present. The output power alarm must be set first before the antenna VSWR alarm can be set. Disconnect the radio communications test and terminate the transmitter with the 3:1 mismatch load. Monitor pin Z26, the Antenna VSWR Alarm line, and turn R36 fully counterclockwise. Pin Z26 should be high. Slowly turn R36 clockwise until pin Z26 is pulled low. Put the 50 ohm load back on again, Pin Z26 should go high. The reverse power trip point is now set for a VSWR of 3:1. Linear Output Open the amplifier case to disable (open circuit) jumper JU3 and enable (short) jumper JU4. Monitor transmitter pin Z26 with a voltmeter. Disconnect the radio communications test set and terminate the transmitter with the 3:1 mismatch load. DANIELS DEELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 3-5 4 Adjust R36, the VSWR alarm adjustment, so that the voltmeter indicates +5 Vdc for a 3:1 mismatch. Put the 50 ohm load back on again. The voltmeter should read approximately 0 Vdc. Disconnect the voltmeter. 3.6.2.5 Antenna VSWR Overload Disconnect the radio communications test set and so that the amplifier is terminated with an open circuit. Monitor the current from the +9.5 Vdc supply. Adjust R38, the VSWR overload adjustment, clockwise until a noticeable drop in the +9.5 Vdc current occurs. Reconnect the radio communications test set and, the +9.5 Vdc current should return to the previous level. 3.6.2.6 Procedure Verification Verify that the current drawn from the +13.8 Vdc supply is less than 1.5 A and from the +9.5 Vdc supply is less than 1.2 A when transmitting full 8 W RF output power. Turn off the power to the transmitter. DANIELS DEELECTRONICS 3-6 UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 4 ILLUSTRATIONS AND SCHEMATIC DIAGRAMS This Page Intentionally Left Blank DANIELS DE ELECTRONICS 4-1 UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 4.1 UT-3/UT-4 UHF Amplifier Component Layout 16 AWG, RED WIRE U4 SEL FB1 + C21 C22 C20 4u7 100n 10n C23 1n FB2 R15 L8 100R 150n L9 C38 + 10u C4 18n C9 1n C6 18n C7 4u7 C8 4u7 L1 Q1 MRF641 L3 C19 L10 L7 180n 180n R1 DIRECTIONAL SEL SEL COUPLER L5 R2 R3 C1 C3 D2 L2 L4 150n SEL SEL 18n 18n 1N5402 TL2 180n 180n C2 D2 18n D3 C5 C25 R14 1N5402 18n D5 C17 BYD17J SEL C24 TL1 49R9 MMBD701 0.6p-3.5p Q2 0.6p-3.5p Q3 Q2 D4 IRF9540 C14 R4 C18 C16 BYD17J D5P06V C26 49k9 150p N/I 15p C15 R12 IRF9540 SEL R32 R17 R13 10n 49k9 TL2 R10 49R9 49R9 L6 22k6 JU5 10k0 R5 C37 TL3 DIRECTIONAL 1u5 TL4 DIRECTIONAL 4k53 10nF C11 R9 COUPLER 100n 10k0 R11 10k0 D1 COUPLER MBZ5233B C12 C13 R2649k9 100n 10n U1 D7 C33 R33 L12 C32 C10 TL5 R34 C35 C31 R24 R22 R23 D6 10n 33172 10n 10n R27 R6 MMBD701 150p SEL 1u5 SEL 100n 1k00 49k9 49k9 MMBD701 100k 4k53 R44 C27 R8 150p Q5 R30 49k9 C29 C30 10k0 R20 U2 27k4 R29 R39 R41 R40 10k0 C36 10k0 BC817 R7 100n 10n R18 10n SEL 1k00 10k0 N/I 33172 U3 R28 R31 50k 27k4 10k0 R42 R43 33172 C28 R19 L11 Q4 C34 R35 1k00 27k4 10n SEL 1u5 Q6 10n 10k0 JU1 JU2 BC817 PZT2222A Not required for low power units Factory installed jumpers Components installed on bottom of board R25 1k00 Q7 PZT2222A R21 50k JU3 R38 50k Components mounted on case M3 x 8 Screws JU4 R36 50k R37 1k00 M2.5 x 6 Screws UT-3/400 LOWPASS FILTER ASSEMBLY M3 x 8 - M2.5 Cap Sock DANIELS DE ELECTRONICS 4-2 TITLE: DATE.: DWG No: DANIELS ELECTRONICS UT3AMPM1A VICTORIA B.C . UT-3/400 AMPLIFIER SM TH DESIGNATIONS LAYOUT DESIGNATIONS AND AND VALUES VALUES NOVEMBER 9, 1993 BOARD No.:UT-3 40643-931613 UHF Amplifier Instruction Manual - 512 MHz 9316A6A 9316A4 9316A5 DWG REV DATE: 4.2 UT-3/UT-4 UHF Amplifier Schematic Diagram TL2 COAX CONFORMABLE +13.8 VDC +13.8 VDC FIL3 LPF +13.8 VDC C20* 4.7uF U4 MHW707-SEL 2 dB PAD FIL2 LPF R4 49k9 MHW 707 TL1* DIRECTIONAL COUPLER TO ALL SWITCHED +9.5V D2 IN5402 L1 180nH TL3 DIRECTIONAL COUPLER C16* 15pF L7* 0.75 TURN Q1* MRF641 C1 18nF L3 180nH L4 180nH C3 18nF C38 10uF C6 18nF C7 4.7uF L8* 150nH C8 4.7uF C17* 0.6-3.5pF R14* 49R9 L5 150nH C18* SEL C24* 0.6-3.5pF R17 49R9 C25* SEL R32 49R9 FB1* +9.5V SWITCHED +9.5V SWITCHED L2 180nH D3 BYD17J OUTPUT POWER ADJUST OUTPUT POWER ALARM C2 18nF R10 10k0 R9 OUTPUT POWER 10k0 SETPOINT FIL4 C13 10nF C32 10nF R31 10k0 LPF C29 R27 100nF 100k Q5 BC817-25 U1a MC33172 R29 10k0 R28 27k4 U3b MC33172 R25 1k00 JU1 OUTPUT POWER ALARM SETPOINT R19 SEL D7 MMBD701 R22 49k9 L6* 1.5uH C28 10nF R21 50k OUTPUT POWER ALARM ADJUST R24 1k00 R11 10k0 L11 1.5uH Q6 PZT2222A R13* 22k6 U1b MC33172 C30 10nF D5* MMBD701 C37 10nF C12 100nF R30 49k9 JU2 C14* 150pF C11 100nF C10 10nF +9.5VSWITCHED R26 49k9 R18 SEL Q3 D5P06V R7 50k +9.5V SWITCHED D4 BYD17J D1 MBZ5233B R20 10k0 C33 150pF JU5 +9.5V SWITCHED C15* 10nF R8 27k4 R12* 49k9 C35 100nF R40 Not Installed C31 10nF U2b MC33172 R39 1k00 R41 10k0 U2a MC33172 R38 50k OUTPUT POWER SELECT VALUES 39k2 49k9 4k53 49k9 2.0 - 8.0 Watts 49k9 22k6 49k9 39k2 UT-3 / UT-4 SELECT VALUES COMPONENT R1 R2 R3 UT-3 406-470 12k1 422R 422R UT-4 406-470 0R0 NOT INSTALLED NOT INSTALLED FIL5 VSWR ALARM ADJUST R35 10k0 Q7 PZT2222A R44 10k0 C34 10nF R36 50k JU3 LPF R34 SEL VSWR OVERLOAD ADJUST R43 27k4 ANTENNA VSWR ALARM L12 1.5uH VSWR ALARM SETPOINT Q4 BC817-25 R33 SEL C36 10nF R23 49k9 OVERLOAD R18 R19 R33 R34 J2 C27 150pF R6 4k53 0.5 - 2.0 Watts LPF LOWPASS FILTER D6 MMBD701 C5 18nF COMPONENT TL5 COAX CONFORMABLE RF OUT R15* 100R C19* SEL TL4 DIRECTIONAL COUPLER C26* SEL Q2 IRF9540 R5 4k53 LPF FB2* L10* 1 TURN FIL1 AMPLIFIER ENABLE INPUT C23* 1nF R3 SEL C4 18nF +9.5 VDC C22* 10nF L9* 5.0 TURN RF IN R2 SEL C21* 100nF C9 1nF R1 SEL J1 SMB U3a MC33172 R42 1k00 JU4 R37 1k00 FREQUENCY BAND SELECT VALUES COMPONENT 406 - 430 MHz U4 C19* C25* C26* MHW707-1 47 pF 7.5 pF 4.7 pF 450 - 470 MHz MHW707-2 39 pF 4.7 pF 3.0 pF 470 - 495 MHz MHW707-3 30 pF 3.0 pF 3.0 pF HIGHEST REFERENCE DESIGNATION 495 - 512 MHz MHW707-4 30 pF Not Installed 3.0 pF NOTE: * denotes components only installed on high power (2.0 - 8.0 Watt) units. C38 D7 FB2 FIL5 J2 JU5 L12 Q7 R44 TL5 U4 UNUSED REFERENCE DESIGNATORS R16 DE DANIELS ELECTRONICS TITLE: UT-3/UT-4 AMPLIFIER SCHEMATIC DIAGRAM DATE: DWG No: BOARD No: DANIELS DE ELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 23 JANUARY 1991 UT3AMPM2B 43-931613 VICTORIA B.C. DWN BY: MICHAEL GAUBE DWG REV DATE: BOARD REV: APRVD: 19 OCTOBER 1998 VERSION 1.3 4-3 This Page Intentionally Left Blank DANIELS DE ELECTRONICS 4-4 UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 4.3 UT-3/400 UHF Lowpass Filter Component Layout 4.4 UT-3/400 UHF Lowpass Filter Schematic Diagram DANIELS DEELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 4-5 This Page Intentionally Left Blank DANIELS DEELECTRONICS 4-6 UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 5 PARTS LISTS 5.1 UT-3 / UT4 UHF Amplifier Electrical Parts List NOTE: Reference Designators labeled with an asterisk (*) are used only in 2.0 - 8.0 Watts amplifiers. Ref Desig Description Part No. C1-C6 C7, C8 C9 C10 C11, C12 C13 C14* C15* C16* C17* C18* C19* C19* C19* C19* C20* C21* C22* C23* C24* C25* C25* C25* C25* C26* C26* C26* C26* C27 C28 C29 C30-C32 C33 C34 C35 C36 C37 C38 CAP., SM, 18nF CER, 1206, X7R CAP., SM, 4.7µF TANT., 10%, 16V CAP., SM, 1nF CER, 1206, C0G CAP., SM, 10nF CER, 1206, X7R CAP., SM, 100nF CER, 1206, X7R CAP., SM, 10nF CER, 1206, X7R CAP., SM, 150pF CER, 1206, C0G CAP., SM, 10nF CER, 1206, X7R CAP., SM, 15pF PORCEL., ±5%, 500V CAP. TRIM, 0.6-3.5pF VERT., >9T CAP., SM, NOT INSTALLED CAP., SM, 47pF PORCEL., ±5%, 500V CAP., SM, 39pF PORCEL., ±5%, 500V CAP., SM, 30pF PORCEL., ±5%, 500V CAP., SM, 30pF PORCEL., ±5%, 500V CAP., 4.7µF DIP. TANT., 10%, 35V CAP., SM, 100nF CER, 1206, X7R CAP., SM, 10nF CER, 1206, X7R CAP., SM, 1nF CER, 1206, C0G CAP. TRIM, 0.6-3.5pF VERT., >9T CAP., SM, 7.5pF PORCEL., ±0.25pF CAP., SM, 4.7pF PORCEL., ±0.25pF CAP., SM, 3.0pF PORCEL., ±0.25pF CAP., SM, NOT INSTALLED CAP., SM, 4.7pF PORCEL., ±0.25pF CAP., SM, 3.0pF PORCEL., ±0.25pF CAP., SM, 3.0pF PORCEL., ±0.25pF CAP., SM, 3.0pF PORCEL., ±0.25pF CAP., SM, 150pF CER, 1206, C0G CAP., SM, 10nF CER, 1206, X7R CAP., SM, 100nF CER, 1206, X7R CAP., SM, 10nF CER, 1206, X7R CAP., SM, 150pF CER, 1206, C0G CAP., SM, 10nF CER, 1206, X7R CAP., SM, 100nF CER, 1206, X7R CAP., SM, 10nF CER, 1206, X7R CAP., 10nF FILM, MMK5, 10%,63V CAP., 10µF DIP. TANT., 20%, 25V 1008-4B183K5R 1055-5B475K16 1008-3B102K1G 1008-4B103K5R 1008-5B104K5R 1008-4B103K5R 1008-2B151J1G 1008-4B103K5R 1036-1B2150J5 1082-C0R6003G NOT INSTALLED 1036-1B2470J5 1036-1B2390J5 1036-1B2300J5 1036-1B2300J5 1054-5E475K35 1008-5B104K5R 1008-4B103K5R 1008-3B102K1G 1082-C0R6003G 1036-0B2759C5 1036-0B2479C5 1036-0B2309C5 NOT INSTALLED 1036-0B2479C5 1036-0B2309C5 1036-0B2309C5 1036-0B2309C5 1008-2B151J1G 1008-4B103K5R 1008-5B104K5R 1008-4B103K5R 1008-2B151J1G 1008-4B103K5R 1008-5B104K5R 1008-4B103K5R 1016-4A103K63 1054-6E106M25 D1 D2 D3, D4 D5* D6, D7 DIODE, MBZ5233B 6.0V ZENER, SOT-23 DIODE, IN5402 3A RECT, DO-201AD DIODE, BYD17J RECTIFIER, SOD-87 DIODE, MMBD701 HOT CARRIER, SOT-23 DIODE, MMBD701 HOT CARRIER, SOT-23 2102-MBZ5233B 2001-1N540200 2101-BYD17J00 2105-MMBD7010 2105-MMBD7010 (406-430 MHz) (450-470 MHz) (470-490 MHz) (490-512 MHz) (406-430 MHz) (450-470 MHz) (470-490 MHz) (490-512 MHz) (406-430 MHz) (450-470 MHz) (470-490 MHz) (490-512 MHz) DANIELS DEELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 5-1 Ref Desig Description Part No. FB1* FB2* FIL1, 2 FIL3* FIL4, 5 FERRITE BEAD, 64 MIX 3x3.5 mm OD FERRITE BEAD, 64 MIX 3x3.5 mm OD FILTER, EMI PI/5500pF, 8-32 UNC FILTER, EMI PI/5500pF, 8-32 UNC FILTER, EMI PI/5500pF, 8-32 UNC 1210-64030350 1210-64030350 1302-P552D10D 1302-P552D10D 1302-P552D10D J1 J2 CONN., SMB, JACK,2 HOLE FLANGE CONNECTOR, N JACK PANEL MNT, C/SNK 5120-J2SC01BG 5184-10923011 L1-L4 L5 L6* L7* L8* L9* L10* L11, L12 INDUCTOR, SM, 180nH 20%, 1812 CHOKE RF/MOLDED, 150nH 10%, 0.37 INDUCTOR, SM, 1.5µH 10%, 1812 COIL, 0.75 TURN 16AWG, 4.0 mm ID CHOKE RF/MOLDED, 150nH 10%, 0.25 COIL/RF, 5.0 TURN 18AWG, 0.18"ID COIL, 1 TURN 16AWG, 4.0 mm ID INDUCTOR, SM, 1.5µH 10%, 1812 1255-2GR1800M 1251-2B00R15K 1255-3G1R500K $1220-0T751615 1251-2A00R15K $1220-5T001817 $1220-1T001617 1255-3G1R500K Q1* Q2 Q3 Q4, Q5 Q6, Q7 TRANSISTOR, MRF641 470 MHz, 15W MOSFET, IRF9540 P-CHANNEL, TO-220 MOSFET, D5P06V P-CHANNEL, DPAK TRANSISTOR, BC817-25 NPN, SOT-23 TRANSISTOR, PZT2222A NPN, SOT-223 2025-MRF64100 2044-IRF95400 2144-D5P06V00 2120-BC817025 2120-PZT2222A R1 R1 R2, R3 R2, R3 R4 R5, R6 R7 R8 R9-R11 R12* R13* R14* R15* R16 R17 R18 R18 R19 R19 R20 R21 R22,R23 R24,R25 R26 R27 R28 R29 RES., SM, 12R1 1206, 1%, 100ppm RES., SM, ZERO OHM JUMPER,1206 RES., SM, 422R 1206, 1%, 100ppm NOT INSTALLED RES., SM, 49k9 1206, 1%, 100ppm RES., SM, 4k53 1206, 1%, 100ppm POT., SM, 50k 12 TURN, SIDE ADJUST RES., SM, 27k4 1206, 1%, 100ppm RES., SM, 10k0 1206, 1%, 100ppm RES., SM, 49k9 1206, 1%, 100ppm RES., SM, 22k6 1206, 1%, 100ppm RES., SM, 49R9 1206, 1%, 100ppm RES., 100R METAL FILM, 5%, 2W UNUSED REFERENCE DESIGNATION RES., SM, 49R9 1206, 1%, 100ppm RES., SM, 39k2 1206, 1%, 100ppm RES., SM, 49k9 1206, 1%, 100ppm RES., SM, 49k9 1206, 1%, 100ppm RES., SM, 22k6 1206, 1%, 100ppm RES., SM, 10k0 1206, 1%, 100ppm POT., SM, 50k 12 TURN, SIDE ADJUST RES., SM, 49k9 1206, 1%, 100ppm RES., SM, 1k00 1206, 1%, 100ppm RES., SM, 49k9 1206, 1%, 100ppm RES., SM, 100k 1206, 1%, 100ppm RES., SM, 27k4 1206, 1%, 100ppm RES., SM, 10k0 1206, 1%, 100ppm 1150-1B12R1FP 1150-0B0R0000 1150-2B4220FP NOT INSTALLED 1150-4B4992FP 1150-3B4531FP 1172-M30503X5 1150-4B2742FP 1150-4B1002FP 1150-4B4992FP 1150-4B2262FP 1150-1B49R9FP 1105-2A0101JI 1150-1B49R9FP 1150-4B3922FP 1150-4B4992FP 1150-4B4992FP 1150-4B2262FP 1150-4B1002FP 1172-M30503X5 1150-4B4992FP 1150-3B1001FP 1150-4B4992FP 1150-5B1003FP 1150-4B2742FP 1150-4B1002FP (UT-3 406-470 MHz) (UT-4 406-470 MHz) (UT-3 406-470 MHz) (UT-3 406-470 MHz) (0.5 (2.0 (0.5 (2.0 - 2.0 - 8.0 - 2.0 - 8.0 Watts) Watts) Watts) Watts) DANIELS DEELECTRONICS 5-2 UHF Amplifier Instruction Manual UT-3 406 - 512 MHz R30 R31 Ref Desig RES., SM, 49k9 1206, 1%, 100ppm RES., SM, 10k0 1206, 1%, 100ppm 1150-4B4992FP 1150-4B1002FP Description Part No. R32 R33 R33 R34 R34 R35 R36 R37 R38 R39 R40 R41 R42 R43 R44 RES., SM, 49R9 1206, 1%, 100ppm RES., SM, 4k53 1206, 1%, 100ppm RES., SM, 49k9 1206, 1%, 100ppm RES., SM, 49k9 1206, 1%, 100ppm RES., SM, 39k2 1206, 1%, 100ppm RES., SM, 10k0 1206, 1%, 100ppm POT., SM, 50k 12 TURN, SIDE ADJUST RES., SM, 1k00 1206, 1%, 100ppm POT., SM, 50k 12 TURN, SIDE ADJUST RES., SM, 1k00 1206, 1%, 100ppm RES., SM, NOT INSTALLED RES., SM, 10k0 1206, 1%, 100ppm RES., SM, 1k00 1206, 1%, 100ppm RES., SM, 27k4 1206, 1%, 100ppm RES., SM, 10k0 1206, 1%, 100ppm 1150-1B49R9FP 1150-3B4531FP 1150-4B4992FP 1150-4B4992FP 1150-4B3922FP 1150-4B1002FP 1172-M30503X5 1150-3B1001FP 1172-M30503X5 1150-3B1001FP NOT INSTALLED 1150-4B1002FP 1150-3B1001FP 1150-4B2742FP 1150-4B1002FP TL1* TL2 TL3, TL4 TL5 COAX, COAX, COAX, COAX, 7496-30CR005T 7482-5024T083 7496-30CR005T 7482-5024T083 U1-U3 U4 U4 U4 U4 I.C., MC33172 DUAL OP AMP, S0-8 AMP, RF, MHW707-1 7W, 403-440 MHz AMP, RF, MHW707-2 7W, 440-470 MHz AMP, RF, MHW707-3 7W, 470-500 MHz AMP, RF, MHW707-4 7W, 490-512 MHz 2302-33172N08 2257-MHW70701 2257-MHW70702 2257-MHW70703 2257-MHW70704 PCB UT-3/400 AMPLIFIER 4323-15931613 LPF UT-3/400 LOWPASS FILTER ASSEMBLY A23-LPF-3 DIRECTIONAL COUPLER 0.5" CONFORMABLE 50 OHM, 0.083", 60 mm DIRECTIONAL COUPLER 0.5" CONFORMABLE 50 OHM, 0.083", 29 mm (0.5 (2.0 (0.5 (2.0 - 2.0 - 8.0 - 2.0 - 8.0 Watts) Watts) Watts) Watts) (406-430 MHz) (450-470 MHz) (470-490 MHz) (490-512 MHz) DANIELS DEELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 5-3 5.2 UT-3/400 UHF Amplifier Mechanical Parts List Description Part No. Qty. CAP SCREW, 8-32 X 1/4, HEX BUTTON - 9/64 CASE, MT-3 VHF/UHF AMPLIFIER, ALUMINUM 5806-832BH04S 3702-66102130 (0.5 - 2.0 Watts) HEATSHRINK, 1/8" DIA, RED, 1" LENGTH CONSUMABLE (2.0 - 8.0 Watts) INSULATOR, THERM. COND. TO-220 5622-1T220701 LABEL, IDENTIFICATION/TEST, FOIL LID, CASE MT-3 AMPLIFIER, ALUMINUM CONSUMABLE 3702-66102151 SCREW, M2 X 6, PAN/PHIL., A2 SCREW, M2 X 4, PAN/PHIL., A2 SCREW, M2.5 X 6, PAN/PHIL., A2 SCREW, M3 X 6, FLAT/PHIL., A2 SCREW, M3 X 8, PAN/PHIL., A2 SCREW, M3 X 8, CAP SOCK-M2.5 SCREW, M3 X 8, CAP SOCK-M2.5 5812-2M0PP06S 5812-2M0PP04S 5812-2M5PP06S 5812-3M0FP06S 5812-3M0PP08S 5816-3M0SH08S 5816-3M0SH08S 10 SET SCREW, M3 X 3, HEX SOCKET, A2 SHOULDER WASHER, M3 0.24" OD, NYLON 5817-3M0AC03S 5674-120N2440 TURRET TERMINAL, 4-40 0.188L, Tn 5053-144M188T WIRE, PVC/STRANDED 16AWG, RED, 70 mm 7110-16S26302 5.3 (0.5 - 2.0 Watts) (2.0 - 8.0 Watts) (2.0 - 8.0 Watts) UT-3/400 UHF Low Pass Filter Electrical Parts List Ref Desig Description Part No. C1 C2-C4 C5 CAP., SM, 7.5pF PORCEL, ±0.25 pF CAP., SM, 15pF PORCEL, ±5%, 500V CAP., SM, 7.5pF PORCEL, ±0.25 pF 1036-0B2759C5 1036-1B2150J5 1036-0B2759C5 L1 - L4 COIL, 2 TURNS 16 AWG BELD, 4.0 mm ID 1220-2T001622 PCB PCB, LPF, VT-3/150 & UT-3/400 4321-16931712 DANIELS DEELECTRONICS 5-4 UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 6 REVISION HISTORY ISSUE DATE REVISION First Issue. October 98 DANIELS DEELECTRONICS UHF Amplifier Instruction Manual UT-3 406 - 512 MHz 6-1 ISSUE DATE REVISION DANIELS DEELECTRONICS 6-2 UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
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