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DE

DANIELS

ELECTRONICS

UHF Amplifier Instruction Manual UT-3 406 - 512 MHz

6-1

6

REVISION HISTORY

ISSUE

DATE

REVISION

1

October 98

First Issue.

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Summary of Contents for MT-3

Page 1: ...m 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 Daniels Electronics Ltd Printing Date O...

Page 2: ...ature 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 ...

Page 3: ...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...

Page 4: ...Instruction Manual UT 3 406 512 MHz 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 6 REVISION HISTORY 6 1 ...

Page 5: ...fier 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 fo...

Page 6: ... 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 ...

Page 7: ... 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 t...

Page 8: ...ifies 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 th...

Page 9: ...tor 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...

Page 10: ...ircuit 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 T...

Page 11: ...nsmitter 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 surfac...

Page 12: ...uration 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 Output power alarm linear output Jumper JU2 installed Output power alarm open collector output Jumper JU3 installed Antenna VSWR alarm open collector output Jumper JU4 not installed Antenna VSWR alarm linear output ...

Page 13: ...ne 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 ...

Page 14: ...ations 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 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 req...

Page 15: ...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 1 Disconnect the radio communications test and terminate the transmitter with the 3 1 mismatch load 2 Monitor pin Z26 the Antenna VSWR Alarm line and turn R36 fully counterclockwise Pin Z26 should be high Slowly turn R36 clockwise u...

Page 16: ...t and so that the amplifier is terminated with an open circuit 2 Monitor the current from the 9 5 Vdc supply 3 Adjust R38 the VSWR overload adjustment clockwise until a noticeable drop in the 9 5 Vdc current occurs 4 Reconnect the radio communications test set and the 9 5 Vdc current should return to the previous level 3 6 2 6 Procedure Verification 1 Verify that the current drawn from the 13 8 Vd...

Page 17: ...DE DANIELS ELECTRONICS 4 1 UHF Amplifier Instruction Manual UT 3 406 512 MHz 4 ILLUSTRATIONS AND SCHEMATIC DIAGRAMS This Page Intentionally Left Blank ...

Page 18: ...1 C22 C23 C25 C26 TL3 TL4 R32 R17 D6 C27 R18 L11 C28 R19 C29 C30 R20 R21 U3 U2 R24 R22 R23 R44 C31 C36 R34 C35 R42 R43 D7 L12 C33 R33 C34 R35 Q4 R39 R41 R40 R38 R36 R37 Q7 Q6 JU4 JU3 JU2 JU1 R28 R29 R31 Q5 R30 R27 R26 C32 C14 JU5 R12 9316A5 1n SEL 49k9 180n 180n 180n 180n 18n 18n 4u7 4u7 18n 18n 18n 18n DIRECTIONAL COUPLER BYD17J BYD17J D5P06V 4k53 MBZ5233B 4k53 50k 27k4 33172 10k0 10n 100n 10k0 1...

Page 19: ... C10 10nF R7 50k R5 4k53 R10 10k0 C11 100nF D S Q3 D5P06V R3 SEL R1 SEL R4 49k9 D2 IN5402 LPF FIL1 LPF FIL2 LPF FIL3 C9 1nF C1 18nF C3 18nF C5 18nF C6 18nF C4 18nF C7 4 7uF L1 180nH D S Q2 IRF9540 R6 4k53 D4 BYD17J R2 SEL D3 BYD17J L3 180nH L4 180nH L5 150nH R35 10k0 C34 10nF Q7 PZT2222A R44 10k0 R36 50k C33 150pF R33 SEL R42 1k00 R43 27k4 R23 49k9 C31 10nF C36 10nF 6 5 8 7 4 U2b MC33172 D7 MMBD70...

Page 20: ...DE DANIELS ELECTRONICS 4 4 UHF Amplifier Instruction Manual UT 3 406 512 MHz This Page Intentionally Left Blank ...

Page 21: ...DEDANIELS ELECTRONICS UHF Amplifier Instruction Manual UT 3 406 512 MHz 4 5 4 3 UT 3 400 UHF Lowpass Filter Component Layout 4 4 UT 3 400 UHF Lowpass Filter Schematic Diagram ...

Page 22: ...DEDANIELS ELECTRONICS 4 6 UHF Amplifier Instruction Manual UT 3 406 512 MHz This Page Intentionally Left Blank ...

Page 23: ...P SM 10nF CER 1206 X7R 1008 4B103K5R C23 CAP SM 1nF CER 1206 C0G 1008 3B102K1G C24 CAP TRIM 0 6 3 5pF VERT 9T 1082 C0R6003G C25 CAP SM 7 5pF PORCEL 0 25pF 1036 0B2759C5 406 430 MHz C25 CAP SM 4 7pF PORCEL 0 25pF 1036 0B2479C5 450 470 MHz C25 CAP SM 3 0pF PORCEL 0 25pF 1036 0B2309C5 470 490 MHz C25 CAP SM NOT INSTALLED NOT INSTALLED 490 512 MHz C26 CAP SM 4 7pF PORCEL 0 25pF 1036 0B2479C5 406 430 M...

Page 24: ...1 100ppm 1150 1B12R1FP UT 3 406 470 MHz R1 RES SM ZERO OHM JUMPER 1206 1150 0B0R0000 UT 4 406 470 MHz R2 R3 RES SM 422R 1206 1 100ppm 1150 2B4220FP UT 3 406 470 MHz R2 R3 NOT INSTALLED NOT INSTALLED UT 3 406 470 MHz R4 RES SM 49k9 1206 1 100ppm 1150 4B4992FP R5 R6 RES SM 4k53 1206 1 100ppm 1150 3B4531FP R7 POT SM 50k 12 TURN SIDE ADJUST 1172 M30503X5 R8 RES SM 27k4 1206 1 100ppm 1150 4B2742FP R9 R...

Page 25: ... M30503X5 R39 RES SM 1k00 1206 1 100ppm 1150 3B1001FP R40 RES SM NOT INSTALLED NOT INSTALLED R41 RES SM 10k0 1206 1 100ppm 1150 4B1002FP R42 RES SM 1k00 1206 1 100ppm 1150 3B1001FP R43 RES SM 27k4 1206 1 100ppm 1150 4B2742FP R44 RES SM 10k0 1206 1 100ppm 1150 4B1002FP TL1 COAX DIRECTIONAL COUPLER 0 5 7496 30CR005T TL2 COAX CONFORMABLE 50 OHM 0 083 60 mm 7482 5024T083 TL3 TL4 COAX DIRECTIONAL COUPL...

Page 26: ... 5 X 6 PAN PHIL A2 5812 2M5PP06S 3 SCREW M3 X 6 FLAT PHIL A2 5812 3M0FP06S 4 SCREW M3 X 8 PAN PHIL A2 5812 3M0PP08S 9 SCREW M3 X 8 CAP SOCK M2 5 5816 3M0SH08S 4 0 5 2 0 Watts SCREW M3 X 8 CAP SOCK M2 5 5816 3M0SH08S 6 2 0 8 0 Watts SET SCREW M3 X 3 HEX SOCKET A2 5817 3M0AC03S 1 SHOULDER WASHER M3 0 24 OD NYLON 5674 120N2440 1 TURRET TERMINAL 4 40 0 188L Tn 5053 144M188T 1 WIRE PVC STRANDED 16AWG R...

Page 27: ...DEDANIELS ELECTRONICS UHF Amplifier Instruction Manual UT 3 406 512 MHz 6 1 6 REVISION HISTORY ISSUE DATE REVISION 1 October 98 First Issue ...

Page 28: ...DEDANIELS ELECTRONICS 6 2 UHF Amplifier Instruction Manual UT 3 406 512 MHz ISSUE DATE REVISION ...

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