DANIELS TM ELECTRONICS LTD. MT-3 RADIO SYSTEMS FREQUENCY SELECT HANDLE INSTRUCTION MANUAL Covers the following: Frequency Select Handle portion of VR-3A130-SYD210 & VT-3A130-SYD410 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.
Reviewed By: Quality Assurance: Claudia Boorman 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.
TABLE OF CONTENTS Page 1 GENERAL ......................................................................................... 1-1 1.1 Introduction .................................................................................. 1-1 1.2 Printed Circuit Board Numbering Convention........................................... 1-1 1.3 Performance Specifications................................................................. 1-1 2 THEORY OF OPERATION ..............................................................
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1 1.1 GENERAL Introduction The Frequency Select Handle provides the ability to select and display the operating frequency of the receiver or transmitter on the Front Panel. Power is provided from a regulated +9.5 Vdc supply and draws typically less than 4.0 mA in sleep mode. 1.
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2 THEORY OF OPERATION 2.1 General The user interface consists of an 8 digit display and 3 pushbuttons, frequency increase Ø, frequency decrease Œ, and options ¸. On power up or key press, the synthesizer is interrogated for the current channel number and channel frequency. This information is used to generate the display, and update the synthesizer itself. The Frequency Select Handle communicates with the synthesizer using a standard 2 wire serial interface (9600 Baud, 8 bits, no parity, 1 stop bit).
c) Both the Ø or Œ have two modes of operation. i. Single press is for small changes. Single button presses corresponds to single channel ( 25 kHz) steps. ii. Accelerated is for large steps. After 6 seconds of the button being pressed the frequency will change by8 channels per step (200 kHz). After 9 seconds of the button being pressed the frequency will change by 20 channels per step (500 kHz). Note: The operating frequency is set to displayed value once the Ø or Œ buttons is released.
3 3.1 ALIGNMENT General Under normal circumstances no alignment is required to the Frequency Select Handle. 3.2 Repair Note The Frequency Select Handle employs a high percentage of surface mount components, 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 Electro Static Dissipative (ESD) protection. 3.
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4 ILLUSTRATIONS AND SCHEMATIC DIAGRAMS 4.1 VR-3A130 Receiver Front Panel RECE I VER MADE IN CANADA RECEIVER MODEL IDENTIFIER MADE IN CANADA VR-3A130-SYD210 SQUELCH DISABLE SQ .
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5 PARTS LISTS 5.1 Frequency Select Handle Electrical Parts List Ref. Desig Description Part No. C1, C2 C3 C4, C5 CAP., SM, 22pF CER., 0805, C0G CAP., 22uF DIP. TANT., 20%,20V CAP., SM,100nF CER,0805,X7R,50 1008-1A220J1G 1054-6G226M20 1008-5A104K5R D1-D6 DIODE, BAS16, SWITCHING, SOT23 2100-BAS16000 PCB PCB, FREQUENCY SELECT HANLE 4312-90500884 R1-R3 R4 R5 R6 R7-R9 RES., RES., RES., RES., RES., SM, 10K0 0805, 1%,100ppm SM, 6K81 0805, 1%,100ppm SM, 10K0 0805, 1%,100ppm SM., ZERO OHM JUMPER.
5.2 Frequency Select Handle Mechanical Parts List Description Part No. Qty. HOUSING, 0.1",5 POS.,MALE TERM HOUSING, 0.1",5 POS.,FEM. TERM 5021-HM05L001 5021-HF05L002 1 1 LABEL, 3537-40121010 1 SHIELD, 3702-67201305 1 TERMINAL, CRIMP, MALE,22-24,Au TERMINAL, CRIMP, FEM.,22-24,Au 5021-TM22B001 5021-TF22B002 5 5 WIRE, PVC/STRAND., 22AWG,BLACK WIRE, PVC/STRAND., 22AWG, RED WIRE, PVC/STRAND., 22AWG, ORG. WIRE, PVC/STRAND.,22AWG,YELLOW WIRE, PVC/STRAND., 22AWG, VIO.
6 REVISION HISTORY ISSUE DATE DESCRIPTION AND (REASON) 1 • Issue 1 Feb 00 DANIELS DE ELECTRONICS Frequency Select Handle Instruction Manual 6-1
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