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MT-4 RADIO SYSTEMS
Copyright © 2000 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:
1
Issue Date:
July 2000
Printing Date:
July 2000
Part No.:
IM21-VT4R150
PROJECT 25 DIGITAL
VHF TRANSMITTER
INSTRUCTION MANUAL
VT-4R
Covers models:
Previous Issue:
Previous Issue Date: N/A
136 - 174 MHz
VT-4R150
N/A
Daniels Electronics Ltd.
Victoria, BC.
PRINTED IN CANADA
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Summary of Contents for Daniels VT-4R150
- Page 1 Daniels Electronics Ltd. DE™ is a registered trademark of Daniels Electronic Ltd. registered in the United States Patent and Trademark Office. Issue:...
- Page 2 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 2.13.2.5 Channel Type ..............2-8 2.13.2.6 Audio Pre-emphasis............. 2-9 2.13.2.7 Timeout Value..............2-9 2.13.2.8 Project 25 Squelch Settings: Network Access Code (NAC) ....2-9 2.13.2.9 Project 25 Squelch Settings: Talk Group ID (TGID)......2-9 VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual...
- Page 4 5.5 Digital Repeater Transmitter Main Board Component Layout (Bottom) ..5-5 5.6 Digital Repeater Transmitter Main Board Component Layout (Top) ....5-6 5.7 Digital Repeater Microprocessor Board Component Layout (Bottom).... 5-7 5.8 Digital Repeater Microprocessor Board Component Layout (Top)....5-8 DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual...
- Page 5 6.2 Digital Repeater Microprocessor Board Parts List ........6-5 6.2.1 Digital Repeater Microprocessor Board Electrical Parts List....6-5 6.2.2 Digital Transmitter Additional PCBs..........6-6 REVISION HISTORY ............... 7-1 MODULE MANUALS VHF Amplifier Instruction Manual VT-3 132 - 174 MHz....IM21-VT3150AMP VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual...
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Page 6: General
Transmitter’s internal modules to be individually assembled and tested, which facilitates construction, tuning, and general Transmitter maintenance. The VT-4R150 Transmitter combines state of the art performance in a compact modular enclosure for applications ranging from remote mountain top repeaters to congested urban radio environments. -
Page 7: Performance Specifications
Operating Voltage: +13.8 Vdc Nominal (range +11 to +16 Vdc), +9.5 Vdc Regulated. Transmit Current: 1.7 Amps at 2 Watts RF Power Output, 2.8 Amps at 8 Watts RF Power Output DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 8: Audio Specifications
Audio Deviation Limiting: +/- 2.5 kHz, +/- 5.0 kHz Audio Distortion: Less than 3% THD; 1 kHz tone at 1.5 kHz or 3 kHz deviation Hum and Noise: -45 dB typical DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 9: Physical Specifications
Gold plated module connectors. Module Design: Compact Eurostandard modular design. Plug-in modules mate with Daniels standard M3 repeater subrack. Subracks / modules comply with IEEE 1101, DIN 41494 and IEC 297-3 (mechanical size / modular arrangement). External Connections: RF Connection: type N connector located on the transmitter module front panel. -
Page 10: Theory Of Operation
THEORY OF OPERATION General An VT-4R150 Transmitter is constructed using two primary modules: the MT-4 Digital Transmitter Main Board and the VT-4 Amplifier Board. The Main Board supports two plug in modules: the Digital Signal Processor Board and the Transceiver RF Board. -
Page 11: High Speed Serial Interconnect
Mic Mode switch on the front panel will operate correctly, selecting Bank A for analog channels, and Bank B for digital channels, as long as this convention is followed. DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 12: Channel Select Line Mapping
Connects future data port to M-3 motherboard JU21 Connects future data port to M-3 motherboard JU22 Connects future data port to M-3 motherboard JU23 Connects future data port to M-3 motherboard DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 13: Hang Timer Selection
Mic connector or the PTT signal from the M-3 subrack. JU46 JU45 JU44 JU43 Hang Time 0 (disabled) 250 ms 500 ms 750 ms 1 sec 1.25 sec 1.5 sec 1.75 sec 2 sec DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 14: Kerchunk Noise Selection
Output of audio summing amplifier +4 VDC, 100 mVAC mid-supply bias voltage for audio circuits +4 VDC Digital Signal Processor board output to 0 VDC inactive, +4.5 VDC active enable RF amplifier DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 15: Connector Pinouts
Transmitter programming is performed with the PC-based Radio Service Software (RSS). A Daniels Radio Programming Interface Module (RPIM) is used with a special programming cable to connect the serial port of an IBM compatible computer to the Digital I/O port on the front panel of the Transmitter module. -
Page 16: Transmitter Wide Options
This setting is currently not used for Repeater Transmitters, but is supported for programming of Daniels P25 Base Transmitters. Correct repeater operation does not require that an encrypted signal be decrypted. An external Repeater Controller may include encryption and decryption hardware for those cases, which require it. -
Page 17: Channel Wide Settings
In either case, the audio at the Unbalanced Audio input is used to modulate the transmitter. The audio signal may also be injected at the CNTL BUS jack on the front panel for interfacing to MT-4 Interim Receivers. DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 18: Audio Pre-Emphasis
This setting may be set to No Tone, CTCSS or DCS. When either CTCSS or DCS Squelch Type is selected, additional combo boxes appear to allow selection of a particular tone or code. DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 19: Analog Signaling Settings: Ctcss Tone
This should not be required unless the distant receiver has its DCS configured with the wrong polarity, typically when DCS has been installed as an after-market option. DANIELS ELECTRONICS 2-10 VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 20: Transmitter Assembly And Adjustment
Changes less than ± 1 MHz from a previously tuned working receive frequency will generally not require any adjustment. Change the frequency using the Radio Programming Software package. Verify that the Transmitter Output power is at the desired level. DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 21: Major Frequency Change
REFERENCE OSCILLATOR menu, where you will see a test frequency displayed and a slider to adjust the frequency. Click on the "ENABLE TX" button and move the slider until the frequency DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 22: Transmitter Deviation Balance Adjustment
Unbalanced Audio input (at P1-Z18) should be connected to an audio signal generator set up to deliver a 1 kHz tone at a level of 308 mVRMS (-8 dBm in a 600 ohm system). The RF output of DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 23: Amplifier Alignment
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 circuit boards. DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 24: Printed Circuit Board Numbering Convention
For example: • PCB number 43-9120 10 indicates circuit board version 1.0; • PCB number 50002- 02 indicates circuit board version 2.0. All PCB's manufactured by Daniels Electronics are identified by one of the above conventions. DANIELS ELECTRONICS... - Page 25 This Page Intentionally Left Blank DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual...
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Page 26: Repeater System Configuration
The transmitter channel is determined by the state of the CSEL0-3 channel select lines, and the receiver can only tell it to key on bank A (analog) or bank B (digital). DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 27: Repeater Interconnect Cable Pinout
+5V, selecting Bank A. There are jumpers inside the receiver and transmitter that may have been removed to disable any or all of these lines. The receiver and transmitter have DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... - Page 28 NOT from bank A, even though the receiver may be receiving on a bank A channel. Make sure that for each transmit channel number, both the A and B bank are programmed with analog information and Project 25 information, respectively. DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual...
- Page 29 This Page Intentionally Left Blank DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual...
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Page 30: Illustrations
MICMODE DIGITAL MICROPHONE MODE SELECTION SWITCH CNTL RJ45 CONNECTOR RF OUT TYPE N RF INPUT JACK DANIELS ELECTRONICS LTD. MADE IN CANADA MADE IN CANADA VT-4R150 xT4DM1B TRANSMITTER MODEL IDENTIFIER DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 31: Digital Repeater Transmitter Exploded View
8. To remove Digital RF PCB shield, unsolder 4 pins. 9. To remove Digital RF PCB, remove two screws (E) and 2 slotted standoffs. TX POWER AMPLIFIER xT4DM2B 10. Assembly is the reverse of steps 1 through 8. DANIELS ELECTRONICS Project 25 Digital Transmitter Instruction Manual... -
Page 32: Digital Repeater Transmitter Block Diagram (Interim Mode)
TIME JU46 KERCHUNK JU41 SELECT DIGITAL LED JU47 JUMPERS BANK SELECT OUT JU48 ANALOG / DIGITAL MIC MODE JU49 BEEP AUDIO BANK SELECT IN BANK A/B* JU50 JU37 PTT OUT xT4DM3B DANIELS ELECTRONICS Project 25 Digital Repeater Transmitter Instruction Manual... -
Page 33: Digital Repeater Transmitter Schematic Diagram
HIGHEST REFERENCE DESIGNATORS RS232 OUT BUS1 NOTE: THERE ARE ADDITIONAL ITEMS ON PAGE 2 FOR C27, D9 J15, JU50 LED1 THE PURPOSE OF THE GENERATING NETLIST. DPDT DANIELS LPF38 MIC1 P1, Q4 VICTORIA B.C. R105,RP1 SW2,TP6 U6, X1 ELECTRONICS LTD. -
Page 34: Digital Repeater Transmitter Main Board Component Layout (Bottom)
PRESS NUT (x9) PRESS NUT (x9) PRESS NUT (x6) PRESS NUT (x6) PRESS NUT (x6) PCB 50062-06 DANIELS xT4DM5B ELECTRONICS LTD. VICTORIA B.C . DANIELS TITLE: DIGITAL REPEATER TX MAIN BOARD OUTLINE (BOTTOM) TITLE: DIGITAL REPEATER TX MAIN BOARD BOTTOM LAYER PEM (BOTTOM) -
Page 35: Digital Repeater Transmitter Main Board Component Layout (Top)
MIC1 Not installed Jumper PCB 50062-06 xT4DM6B DANIELS TITLE: DIGITAL REPEATER TX MAIN BOARD THROUGH HOLE LAYOUT (TOP) TITLE: DIGITAL REP. TX MAIN BOARD THROUGH HOLE DESIGNATIONS (TOP) TITLE: DIGITAL REP. TX MAIN BOARD PEM (TOP) TITLE: DIGITAL REPEATER TX MAIN BOARD SURFACE MOUNT JUMPER (TOP) TITLE: DIGITAL REPEATER TX MAIN BOARD SURFACE MOUNT LAYOUT (TOP) ELECTRONICS LTD. -
Page 36: Digital Repeater Microprocessor Board Component Layout (Bottom)
PCB 50090-03 20 PIN HEADER 20 PIN RIGHT 20 PIN RIGHT ANGLE HEADER ANGLE HEADER DANIELS xT4DM7B ELECTRONICS VICTORIA B.C . TITLE.: DIGITAL REP. TX MICROPROCESSOR BD SMT DESIGN. (BOT.) TITLE: DIGITAL REP. TX MICROPROCESSOR BOARD SMT LAYOUT (BOTTOM) TITLE: DIGITAL REP. TX MICROPROCESSOR BOARD TH LAYOUT (BOTTOM) TITLE: DIGITAL REP. -
Page 37: Digital Repeater Microprocessor Board Component Layout (Top)
TITLE: DIGITAL REP. TX MICROPROCESSOR BOARD SMT LAYOUT (TOP) TITLE: DIGITAL REP. TX MICROPROCESSOR BD SMT DESIGNATIONS (TOP) TITLE: DIGITAL REP. TX MICROPROCESSOR BD SMT JUMPER DESIGN. (TOP) DANIELS ELECTRONICS LTD. Project 25 Digital Repeater Transmitter Instruction Manual DWG N0:... -
Page 38: Parts List
LPF6 FILTER, SM, EM1/LPF, 360pF,FER 1306-T361F2D5 LPF7 FILTER, SM, EM1/LPF, 360pF,FER 1306-T361F2D5 LPF8 FILTER, SM, EM1/LPF, 360pF,FER 1306-T361F2D5 LPF9 FILTER, SM, EM1/LPF, 360pF,FER 1306-T361F2D5 LPF10 FILTER, SM, EM1/LPF, 360pF,FER 1306-T361F2D5 DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... - Page 39 RES., SM, 1K0 0805, 1%,100ppm 1150-3A1001FP RES., SM, 15K0 0805, 1%,100ppm 1150-4A1502FP RES., SM, 10K0 0805, 1%,100ppm 1150-4A1002FP RES., SM, 604R 1206, 1%,100ppm 1150-2B6040FP RES., SM, 100K0 0805, 1%,100ppm 1150-5A1003FP DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual...
- Page 40 IC, LP2951 PROG. VOLT REG,SO-8 2305-29510N08 IC, LP2951 PROG. VOLT REG,SO-8 2305-29510N08 IC, MC33172 DUAL OP AMP, SO-8 2302-33172N08 IC, MC33172 DUAL OP AMP, SO-8 2302-33172N08 IC, DS92LV010A,BUS TRNCVR,SO-8 2378-92010N08 DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual...
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Page 41: Digital Repeater Transmitter Main Board Mechanical Parts List
5812-2M5PP03S SCREW, M3 x 6,OVAL C/S/PHIL,A2 5812-3M0VP06S SCREW, M3 x8,OVAL C/S/PHIL,A2 5812-3M0VP08S SHIELD, CONTROLLER BOARD, DIG TX 3702-67402105 SHIELD, RF BOARD, DIG TX 3702-67402110 SLOTTED SPACER, 5mmOD, 7.8mm L,M2.5 5930-5A065CA1 DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 42: Digital Repeater Microprocessor Board Parts List
RES., SM, 10M0 1206, 5%,400ppm 1151-7B0106JG RES., SM, 10K0 0805, 1%,100ppm 1150-4A1002FP RES., SM, 100K0 0805, 1%,100ppm 1150-5A1003FP RES., SM, 10K0 0805, 1%,100ppm 1150-4A1002FP RES., SM, 10K0 0805, 1%,100ppm 1150-4A1002FP DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 43: Digital Transmitter Additional Pcbs
IC, 68HC811E2, MIC/CTR, PLCC52 2380-68811P52 RESONATOR, SM, 8.0MHz, CERAMIC 1575-8001816A 6.2.2 Digital Transmitter Additional PCBs Desig Description Part No. TRANSCEIVER RF MODULE, P25, UHG 403-470 MHz A11-XCVR-00 DIGITAL SIGNAL PROCESSOR, P25 A57-DSP-00 DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... -
Page 44: Revision History
REVISION HISTORY ISSUE DATE DESCRIPTION AND (REASON) July 00 • First Issue DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual... - Page 45 This Page Intentionally Left Blank DANIELS ELECTRONICS VT-4R150 VHF Project 25 Digital Transmitter Instruction Manual...
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