Kenwood TK-3148 Service Manual

UHF FM TRANSCEIVER / UHF FM 手持机
TK-3148
SERVICE MANUAL /
Helical Antenna (T90-1032-25)
Knob (ENC) (K29-9134-03)
Knob (VOL) (K29-9133-03)
Knob (PTT) (K29-9131-03)
Key top (SW1,SW2) (K29-9132-03)
维修手册
© 2003-9 PRINTED IN JAPAN
B51-8656-00 (S) PDF

CONTENTS

GENERAL ....................................................................... 2
OPERATING FEATURES ............................................... 4
REALIGNMENT .............................................................. 6
CIRCUIT DESCRIPTION ............................................... 10
SEMICONDUCTOR DATA ........................................... 19
COMPONENTS DESCRIPTION ................................... 21
PARTS LIST .................................................................. 23
EXPLODED VIEW ......................................................... 31
PACKING ...................................................................... 32
ADJUSTMENT ............................................................. 33
TERMINAL FUNCTION ................................................ 52
PC BOARD VIEWS
TX-RX UNIT (X57-6413-01) (A/3) .......................... 54
TX-RX UNIT (X57-6413-01) (B/3),(C/3) ................. 58
SCHEMATIC DIAGRAM ............................................... 60
LEVEL DIAGRAM ......................................................... 65
BLOCK DIAGRAM ........................................................ 66
KSC-25 / KNB-24L ....................................................... 68
SPECIFICATIONS ......................................................... 69
Cabinet assy (A02-3653-14)
TK-3148
目录目录
目录
目录目录
概述............................................................................................... 2
系统体系 ...................................................................................... 3
操作特性 ...................................................................................... 4
模式组合 ...................................................................................... 6
电路说明 .................................................................................... 10
半导体数据 ................................................................................ 19
元件说明 .................................................................................... 21
零件表 ........................................................................................ 23
部件分解图 ................................................................................ 31
包装............................................................................................. 32

GENERAL / 概述

INTRODUCTION
SCOPE OF THIS MANUAL
This manual is intended for use by experienced technicians familiar with similar types of commercial grade communications equipment. It contains all required service information for the equipment and is current as of the publication date. Changes which may occur after publication are covered by either Service Bulletins or Manual Revisions. These are issued as required.
调整............................................................................................. 33
端子功能 .................................................................................... 52
PC 板视图
TX-RX单元 (X57-6413-01) (A/3) ................................... 54
TX-RX单元 (X57-6413-01) (B/3),(C/3) ......................... 58
原理图 ........................................................................................ 60
电平图 ........................................................................................ 65
方块图 ........................................................................................ 66
KSC-25 / KNB-24L .................................................................... 68
规格.........................................................................................背面
引言
本手册的范围
本手册是提供给熟悉通信专业并且具有维修经验的技术人员 使用的。它包括了维修该设备所需要的全部资料和现行出版日 期。在出版后如果发生变动、则根据需要使用《维修通报》或
《手册修订本》进行补充。
ORDERING REPLACEMENT PARTS
When ordering replacement parts or equipment information, the full part identification number should be included. This applies to all parts : components, kits, or chassis. If the part number is not known, include the chassis or kit number of which it is a part, and a sufficient description of the required component for proper identification.
PERSONNEL SAFETY
The following precautions are recommended for personnel safety:
DO NOT transmit until all RF connectors are verified secure and any open connectors are properly terminated.
SHUT OFF and DO NOT operate this equipment near electrical blasting caps or in an explosive atmosphere.
This equipment should be serviced by a qualified technician only.
SERVICE
This radio is designed for easy servicing. Refer to the schematic diagrams, printed circuit board views, and alignment procedures contained within.
替换零件的订购
当订购替换零件或设备资料时、应注明完整的零件识别号 码。所有的零件均有识别号码∶元件、组件或机壳。如果不知 道零件的号码、为了正确地识别、必须注明此元件所属的机壳 或组件的号码、并对元件进行充分的说明。
个人安全
为了个人的安全、请注意下列事项∶
在没有认真核实所有射频插头之前或有任何一个打开的插头 没有连接到相应端子上的情况下、均不要发射。
在电爆管附近或在易燃性气体环境中、必须关掉电源、不要 操作本设备。
本设备只应该由有资格的技术人员来维修。
维修服务
为了便于维修本设备、建立了完整的维修服务体系、提供了 包括原理图、印刷线路板图和调整步骤在内的资料供参考。
2

SYSTEM SET-UP / 系统体系

SYSTEM SET-UP / 系统体系

Merchandise received
TK-3148
Choose the type of transceiver
Transceiver programming
Delivery
Frequency range (MHz)
TX/RX
A personal computer (IBM PC or compatible), programming interface (KPG-36), and programming software (KPG-74D CPS) are required for programming. (The frequency, conventional system features, TX power HI/LOW, and signalling data are programmed for the transceiver.)
350~390
RF power Type
4.0W TK-3148 C
3
TK-3148

OPERATING FEATURES / 操作特性

1. Operation Features
The TK-3148 is a UHF FM Radio designed in both Trunking
Mode and Conventional Mode.
2. Transceiver Controls and Indicators
2-1. Physical Layout
32
1
4
5
8
9
10
2-2. Panel controls
The key on the top and front panel is momentary-type push buttons. The functions of these keys and knob are explained below.
11
12
1. 操作特性
TK-3148 是具有集群和常规双模式的 UHF 调频手持机。
2. 手持机的控制和指示
2-1. 主机外形
6
7
13
14
2-2. 控制面板
顶部和前面板上的键是触发式按键。有关这些键和旋钮的功
能说明如下。
15
1 Antenna connector
Connect the antenna here.
2 Rotary encoder
3 POWER switch/ VOLUME control
Turn clockwise to switch ON the transceiver. Rotate to adjust the volume. Turn counterclockwise fully to switch OFF the transceiver.
4 Transmit/ Receive indicator
5 Auxiliary (orange) key
6 Battery pack safety catch
Flip this catch to prevent accidentally pressing the battery pack release latch.
7 Battery pack release latch
Pull back on this latch to release the battery pack.
8 PTT (Push-To-Talk) switch
9 Side 1 key
0 Side 2 key
- S key
= A key
~ 2 B key
! C 3 key
@ Universal connector
Connect the speaker/ microphone here. Otherwise, keep the supplied cover in place.
1 天线连接器
在这里连接天线。
2 旋转编码器 3 电源开关/音量控制器
顺时针旋转可接通对讲机电源。旋转调整音量。逆时针旋 转到底可切断对讲机电源。
4 发射/接收指示灯
5 辅助 (橙黄色) 键 6 电池组保险钩
扳上这个保险钩以防止意外按下电池组释放栓。
7 电池组释放闩锁
按下闩锁可取下电池组。
8 PTT (按讲) 开关 9 侧面 1 键
0 侧面 2 键
- S 键 = A 键
~
B 键
! C @ 通用接口
在这里连接扬声器/麦克风,否则应把附带的盖板盖上。
4
OPERATING FEATURES / 操作特性
TK-3148
2-3. Key functions
Trunking mode
2 Rotary encoder
Rotate this encoder to select your desired call address (voice calls/dialing) or status (status calls).
4 Transmit indicator
Lights red while transmitting.
5 Auxiliary (orange) key (default setting: None)
Press to activate its auxiliary function.
8 PTT (Push-To-Talk) switch
Press to transmit. Also press to initiate a call if “PTT to Initiate Call” has been programmed.
9 Side 1 key (default setting: Clear)
Press to activate its auxiliary function.
0 Side 2 key (default setting: Call)
Press to activate its auxiliary function.
- S key (default setting: Status/ Stack)
Press to activate its auxiliary function.
= A key (default setting: Function Menu)
Press to activate its auxiliary function.
~ 2 B key (default setting: Conventional)
Press to activate its auxiliary function. Also press to scroll left while viewing stack entries.
! C 3 key (default setting: Scan)
Press to activate its auxiliary function. Also press to scroll right while viewing stack entries.
2-3.键功能
集群模式 2 旋转编码器
旋转本编码器选择您所需要呼叫的地址 (语音呼叫/拨号) 或 者状态代码 (用于状态呼叫) 。
4 发射指示灯
在发射中点亮红色。
5 辅助 (橙黄色) 键 (初始设定: )
按下可开启该辅助功能 。
8 PTT (按讲) 开关
按下可发射。当编程了“按 PTT 开始呼叫”后,也可按下 开始呼叫。
9 侧面 1 键 (初始设定: 清除)
按下可开启该功能。
0 侧面 2 键 (初始设定: 呼叫)
按下可开启该功能。
- S 键 (初始设定: 状态/堆栈) 按下可开启该功能。
= A 键 (初始设定: 功能选单)
按下可开启该功能。
~
B 键 (初始设定: 常规) 按下可开启该功能。当观察堆栈条目时,按下可向左侧滚 动。
! C
(初始设定: 扫描) 按下可开启该功能。当观察堆栈条目时,按下可向右侧滚 动。
Conventional mode
2 Rotary encoder
Rotate this encoder to select your desired channel.
4 Transmit/ Receive indicator
Lights green while receiving a signal. Lights red while transmitting.
8 PTT (Push-To-Talk) switch
Press this switch, then speak into the microphone to call a station.
9 Side 1 key
Press to return to Trunking mode.
0 Side 2 key
Press to turn the monitor function ON in order to monitor your selected channel.
- S key
Press to turn the display and keypad backlight ON. The backlight remains ON for 5 seconds.
= A key
Press to add/delete channel(s) to/from Scan list.
! C 3 key
Press to turn Scan ON (or OFF).
常规模式 2 旋转编码器
旋转本编码器选择您所需要的信道。
4 接收指示灯
在接收信号时点亮绿色。在发射中点亮红色。
8 PTT (按讲) 开关
按下该开关,然后对着麦克风讲话呼叫其他电台。
9 侧面 1 键
按下可恢复到集群模式。
0 侧面 2 键
按下可接通监听功能来监听您所选择的信道。
- S 键
按下可开启显示屏和键盘背景照明。背景照明将保持 5 秒 钟。
= A 键
按此键可向扫描序列中添加信道或从扫描序列中删除信道。
! C 键
按下可启动扫描 (或者停止扫描)。
5
TK-3148
REALIGNMENT /
2-4. Display / 显示
123459678
1 Sub display
displays the strength of received signals.
2 Programming indicator
P appears while in AUX A is being activated.
3 MON (Monitor) indicator
MON appears while you are monitoring a channel by pressing the Side 2 key. (Conventional Mode only)
4 SVC (Service) indicator
SVC appears when a control channel is found. It flashes while the transceiver is searching for a control channel.
MON
模式组合
SVC
SCN LO
① 子显示字段
显示接收到信号的强度。
② 显示图标
当 AUX A 被激活时显示 P
③ MON(监听)指示
当用户按下侧面 2 键监听某一信道时显示“MON”。(只适用 于常规模式)
④ SVC(服务)指示
当找到一个控制信道时显示“SVC”。当手持机正在搜索控 制信道时,此图标闪烁。
5 SCN (Scan) indicator
SCN appears while you are scanning.
6 LO indicator
This icon blinks while in battery warning, if “Always” or “Always W/beep” is selected in the battery warning settings.
7 Handset indicator
flashes when you activate call diversion.
8 MAIL indicator
appears while there is data in the stack. It flashes when
there is new data in the stack.
9 Alphanumeric display
displays call addresses, the call duration timer, data messages, and the current operating status of the transceiver.
REALIGNMENT
1. Modes
User mode
⑤ SCN(扫描)指示
当用户正在扫描时显示“SCN”。
⑥LO指示
如果在电池电压告警设定中选择“连续”或“连续并有提示 音”,则电池电压不足时,此图标闪烁。
⑦ 呼叫转移指示
当手持机处于转移状态时,此 闪烁。
⑧ 信箱指示
当存储器堆栈中有接收信息时显示 。当存储栈中有新信息 时,此图标闪烁。
⑨ 字母数字显示字段
显示呼叫地址,呼叫过程计时器,数据
信息以及手持机当前的操作状态等。
模式组合
1. 模式
用户模式
Panel test mode
PC mode
Firmware programming mode
6
Panel tuning mode
Data programming mode
PC test mode
PC tuning mode
面板测试模式
计算机模式
固件编程模式
面板调谐模式
数据编程模式
计算机测试模式
计算机调谐模式
TK-3148
REALIGNMENT /
Mode Function
User mode For normal use. Panel test mode Used by the dealer to check the
fundamental characteristics. Panel tuning mode Used by the dealer to tune the radio. PC mode Used for communication between the
radio and PC (IBM compatible). Data program- Used to read and write frequency data ming mode PC test mode Used to check the radio using the PC.
Firmware program- Used when changing the main ming mode program of the flash memory.
2. How to Enter Each Mode
Mode Operation
User mode Power ON Panel test mode [A]+Power ON PC mode Received commands from PC Panel tuning mode [Panel test mode]+[S] Firmware programming mode
and other features to and from the radio.
This feature is included in the FPU.
See panel tuning.
[S]+Power ON
模式组合
模式 功能
用户模式 一般用户使用。 面板测试模式 用于经销商检查基本功能。 面板调谐模式 用于经销商调整手持机指标。 计算机模式 用于手持机与计算机(IBM 兼容机)
之间的通信。 数据编程模式 用于读出和写入频率数据以及其他功能。 计算机测试模式 用于使用计算机检测。此特性包括在
FPU 内。参见面板调谐。 固件编程模式
2. 如何进入每一种模式
用户模式 接通电源 面板测试模式 [A]+接通电源 计算机模式 从计算机接收指令 面板调谐模式 [面板测试模式]+[S] 固件编程模式 [S]+通电
当更新
闪速存储器
模式 操作
中的主程序时使用。
3. Panel Test Mode
Setting method refer to ADJUSTMENT.
4. Panel Tuning Mode
Setting method refer to ADJUSTMENT.
5. PC Mode
5-1. Preface
The TK-3148 transceiver is programmed by using a personal computer, programming interface (KPG-36) and programming software (KPG-74D CPS).
The programming software can be used with an IBM PC or compatible. Figure 1 shows the setup of an IBM PC for programming.
5-2. Connection procedure
1. Connect the TK-3148 to the personal computer with the
interface cable.
2. When the POWER switch on, user mode can be entered
immediately. When PC sends command the radio enter PC mode, and “PROGRAM” is displayed on the LCD. When data transmitting from transceiver, the red LED is blinking. When data receiving to transceiver, the green LED is blinking.
3. 面板测试模式
设定方式,参见调整。
4. 面板调谐模式
设定方式,参见调整。
5. 计算机模式
5-1.前言
TK-3148 手持机使用计算机,编程电缆(KPG-36)和编程软
件(KPG-74D CPS)进行编程。
IBM 计算机或兼容机可以使用编程软件。图 1 显示IBM 计算
机编程的设置。
5-2.连接步骤
1. 使用编程电缆将 TK-3148 与计算机连接。
2. 当接通电源时,立即进入用户模式。当 PC 机发出指令使手 持机进入 PC 机模式时,“PROGRAM”出现在显示器上。
当手持机发送数据时,红色指示灯闪动。 当手持机接收数据时,绿色指示灯闪动。
Notes:
The data stored in the personal computer must match
model type, when it is written into the flash memory.
Change the TK-3148 to PC mode, then attach the interface
cable.
注释∶
储存在计算机内的数据必须与写入到闪速存储器的格式相匹 配。
将 TK-3148 改变为计算机编程模式,然后连接编程电缆。
7
TK-3148
REALIGNMENT /
5-3. KPG-36 description
(PC programming interface cable: Option)
The KPG-36 is required to interface the TK-3148 to the computer. It has a circuit in its D-subconnector (25-pin) case that converts the RS-232C logic level to the TTL level.
The KPG-36 connects the universal connector of the TK­3148 to the computers RS-232C serial port.
5-4. Programming software KPG-74D CPS Description
The KPG-74D CPS is the programming software for the transceiver supplied on three 3.5" floppy disks. This software runs under MS-Windows 98/Me/2000/XP on an IBM-PC or compatible machine.
The data can be input to or read from the transceiver and edited on the screen. The programmed or edited data can be printed out. It is also possible to tune the transceiver.
We recommend that install the KPG-74D CPS for example to hard disk first then use it.
5-5. Programming with IBM PC
If data is transferred to the transceiver from an IBM PC with the KPG-74D CPS, the destination data (basic radio information) for each set can be modified. Normally, it is not necessary to modify the destination data because their values are determined automatically when the frequency range (frequency type) is set.
The values should be modified only if necessary. Data can be programmed into the flash memory in RS-232C format via the universal connector.
模式组合
5-3.KPG-36 说明 (PC 机编程接口电缆∶选件)
TK-3148 需要通过 KPG-36 接口电缆与电脑连接。此接口电 缆的 D 型连接器(25 芯)中有一个将RS-232C 逻辑电平转换为 TTL 电平的电路。
KPG-36 将 TK-3148 的通用接口连接到电脑的 RS-232C 串口 上。
5-4.编程软件 KPG-74D CPS 说明
KPG-74D CPS是手持机的编程软件,共 3 张3.5" 软盘。此软 件的运行环境为 IBM-PC 机或兼容机的 MS-Windows 98/Me/ 2000/XP。
数据可以被写入到手持机或从手持机中读取数据,并且能 在屏幕上进行编辑。已被编程或编辑的数据可以打印出来。也 可以调整手持机的指标。
建议用户在使用之前将 KPG-74D CPS 安装到硬盘上。
5-5.使用 IBM 计算机编程
如果从使用KPG-74D CPS软件的IBM计算机将数据发送到手 持机,设定的通信机型号数据(通信机的基本信息)均可被修 改。由于设定频率范围(频率类型)时、型号数据就已被确定 了,所以一般不需要修改型号数据。
只有在必要的情况下才修改型号数据。
RS-232C 格式的数据经由通用接口输入到通信机的闪速存储 器中。
IBM-PC /
KPG-74D CPS
Fig. 1 / 图1
6. Firmware Programming Mode
6-1. Preface
Flash memory is mounted on the TK-3148. This allows the TK-3148 to be upgraded when new features are released in the future. (For details on how to obtain the firmware, contact Customer Service.)
6-2. Connection procedure
Connect the TK-3148 to the personal computer (IBM PC or compatible) with the interface cable (KPG-36). (Connection is the same as in the PC Mode.)
KPG-36
6. 固件编程模式
6-1.前言
Flash Rom被安装在 TK-3148 上。当将来出现新功能时,允许 TK-3148 升级。(要了解如何获得固件的详细情况,请与供应商 联系。)
6-2.连接步骤
使用编程电缆(KPG-36)将 TK-3148 与计算机(IBM 计算机
或兼容机)连接。(与计算机编程模式中的连接方法一样。)
8
TK-3148
REALIGNMENT /
6-3. Programming
1. Start up the firmware programming software (Fpro.exe).
2. Set the communications speed (normally, 57600 bps) and communications port in the configuration item.
3. Set the firmware to be updated by File name item.
4. Turn the TK-3148 power ON with the [S] switch held down. When "PROG 57600" appears, release your finger from the [S] switch.
5. Check the connection between the TK-3148 and the personal computer, and make sure that the TK-3148 is in the Program mode.
6. Press write button in the window. A window opens on the display to indicate progress of writing. When the TK-3148 starts to receive data. the [P] icon is blinking.
7. If writing ends successfully. the LED on the TK-3148 lights and the checksum is displayed.
8. If you want to continue programming other TK-3148 s, repeat steps 4 to 7.
Notes:
This mode cannot be entered if the Firmware Programming mode is set to Disable in the Programming software (KPG­74D CPS).
When programming the firmware, it is recommend to copy the data from the floppy disk to your hard disk before update the radio firmware. Directry copying from the floppy disk to the radio may not work because the access speed is too slow.
模式组合
6-3.编程
1. 启动固件编程程序(FPRO.exe)。
2. 在配置项中设定通信速率(通常为 57600bps)和通信端口。
3. 在文件名称项中选定新固件的文件名。
4. 按住[S]键并接通 TK-3148的电源。当“PROG57600”出现时, 松开[S]键。
5.检查TK-3148与个人电脑之间的连接是否正确,并且确认 TK­3148 是否处于编程模式。
6. 点击计算机程序上的写入按钮。屏幕上开启一个窗口显示写 入的进程。当 TK-3148 开始接收数据时,[P]图标开始闪动。
7. 写入完成后,TK-3148 上的指示灯发光,并且显示校验码。
8. 如果用户需要继续编程其他的 TK-3148,重复步骤 4 到 7。
注释∶
如果在编程软件(KPG-74D CPS)中固件编程模式设定为禁 用,则不能进入此模式。
当进行固件编程时,在用户更新通信机固件之前,建议从软 盘向硬盘复制数据。 由于读取速率太低,所以直接从软盘复制到通信机可能无 效。
6-4. Function
1. If you press the [Side 1] switch (top of left side) while “PROG 57600” is displayed, the check-sum is displayed. If you press the [Side 1] switch again while the check-sum is displayed, “PROG 57600” is redisplayed.
2. If you press the [Side 2] switch (bottom of left side) while “PROG 57600” is displayed, the display changes to “PROG 19200” to indicate that the write speed is low speed (19200 bps). If you press the [Side 2] switch again while “PROG 19200” is displayed, the display changes to “PROG 38400”, and the write speed becomes the middle-speed mode (38400 bps). If you press the [Side 2] switch again while “PROG 38400” is displayed, the display returns to “PROG 57600”.
Note:
Normally, write in the high-speed mode.
6-4.功能
1. 当显示“PROG57600”时,如果用户按下侧面 1 键(位于左侧 的顶部),则显示check-sum。如果显示check-sum 时再次按下 侧面 1 键,则显示“PROG57600”。
2. 当显示“PROG57600”时,如果用户按下侧面 2 键(位于左侧 的底部),则显示变为“PROG19200”,表示写入速率为低速
(19200bps)。当显示“PROG19200”时,如果用户再次按下侧
面2键,则显示变为“PROG38400”,表示写入速率为中速
(38400bps)。当显示“PROG38400”时,如果用户再次按下侧
面2键,则显示返回到“PROG57600”。
注释∶
通常在高速率模式中写入。
9
TK-3148

CIRCUIT DESCRIPTION / 电路说明

1. Overview
This transceiver is UHF/FM portable transceiver designed
to operate in the frequency range of 350 to 390MHz (C).
2. Circuit Configuration by Frequency
The receiver is a double-conversion superheterodyne with a first intermediate frequency (IF) of 44.85MHz and a second IF of 455kHz. Incoming signals from the antenna are mixed with the local signal from the PLL to produce the first IF of
44.85MHz.
This is then mixed with the 44.395MHz second local oscillator output to produce the 455kHz second IF. This is detected to give the demodulated signal.
The transmit signal frequency is generated by the PLL VCO, and modulated by the signal from the microphone. It is then amplified and sent to the antenna.
TX/RX : 350~390MHz : C
ANT
ANT
SW
1st MIX
RF
AMP
305.15~345.15MHz : C
MCF
44.85MHz
1.综述
本手持机是在350 到 390MHz(C)的频率范围内工作的UHF/
FM 手持式设备。
2.电路的频率构成
接收部采用 44.85MHz 的第一中频和455kHz 的第二中频的二 次变频超外差方式。通过天线接收到的信号与来自于锁相环电 路的本振信号混频生成 44.85MHz 的第一中频。
然后与44.395MHz的第二本振信号混频生成455kHz的第二中 频。此频率被检测并产生解调信号。
锁相环压控振荡器生成发射信号频率,并且被来自于麦克风 的信号调制。然后被放大并发送到天线。
CF
455kHz
FM IF
SYSTEM
44.395MHz
AF
AMP
SP
PA
AMP
TX
AMP
350~390MHz : C
Fig. 1 Frequency configuration / 图1 频率构成
3. Receiver System
3-1. RF unit
An incoming RF signal from the antenna terminal is passed through the antenna switch (D102, D103, D104 and D105 are off) and then the bandpass filter (L215 and L217). High pass filter HPF (L219) the 1st image response improve. And the bandpass filter is adjusted by a variable capacitor. The input voltage to the variable capacitor is regulated by the voltage output from the D/A converter (IC307). The signal is amplified by RF amplifier Q207, and passed through the bandpass filter (L209, L210 and L211). The resulting signal is applied to the first mixer (Q206), where it is mixed with the first local oscillator signal output from the frequency synthesizer to produce the first IF (44.85MHz).
PLL
VCO
MIC
AMP
MIC
3. 接收部系统
3-1. 射频单元
由天线接收到的射频信号进入天线开关(D102,D103,D104 和 D105 截止),然后通过带通滤波器(L215 和 L217)。高通滤 波器 HPF(L219),抑制镜像信号。带通滤波器由可变电容进行 调整。向可变电容输出的电压通过来自于数/模转换器(IC307) 的电压输出进行调节。信号被射频放大器Q207放大,并通过带 通滤波器(L209,L210 和 L211)生成的信号进入第一混频器
(Q206),并且与来自于频率合成器的第一本振信号混频生成第
一中频(44.85MHz)。
10
CIRCUIT DESCRIPTION / 电路说明
IC200
MIX, DET, IF
SW
Q204
DMDM
IC300 (2/2)
AF AMP
5
DE-
EMP
MUTE
EXP
HPF LPF HPF BEF
IC500
21
VOL
IC307
IC305 (2/2)
AF AMP
41
VC1
VC2
Q308
SSW
INT.
SP
EXT.
SP
2nd local
OSC
X200
AF
AF
SW
IC313 AF PA
ANT
SW
L110~112
L215,217
BPF
D102~105
Q207
RF
AMP
ANT
Q206
1st MIX
Q205 1st IF
L209~211
BPF
XF200
MCF
1st Local
OSC (PLL)
CF1 : Wide
CF2 : Narrow
TK-3148
3-2. IF unit
The first IF signal is passed through a crystal filter (XF200) to remove a adjacent channel signal. The filtered first IF signal is amplified by the first IF amplifier (Q205) and then applied to the lF system IC (IC200). The IF system IC provides a second mixer, second local oscillator, limiting amplifier, quadrature detector and RSSI (Received Signal Strength Indicator). The second mixer mixes the first IF signal with the 44.395MHz of second local oscillator output (crystal unit X200) and produces the second IF signal of 455kHz.
The second IF signal is passed through the ceramic filter (CF200; Wide, CF201; Narrow) to more remove the adjacent channel signal. The filtered second IF signal is amplified by the limiting amplifier and demodulated by the quadrature detector with ceramic discriminator (CD200). The demodulated signal is routed to the audio circuit.
3-2.中频单元
第一中频信号通过晶体滤波器(XF200)消除邻道的信号。经 滤波的第一中频信号被第一中频放大器(Q205)放大并进入中 频系统芯片(IC200)。中频系统芯片提供第二混频器,第二本 振信号,限幅放大器,正交检测器和 RSSI(接收信号强度指示 器)。第二混频器将第一中频信号与44.395MHz的第二本振信号 输出(晶体单元 X200)进行混频,并生成 455kHz 的第二中频 信号。
第二中频信号通过陶瓷滤波器(CF200∶宽,CF201∶窄)继 续消除相邻信道的信号。经滤波的第二中频信号被限幅放大器 放大并被带有陶瓷鉴频器(CD200)的正交鉴频器进行解调。解 调后的信号进入音频电路。
3-3. Wide/Narrow changeover circuit
Narrow and Wide settings can be made for each channel
by switching the ceramic filters CF200 (Wide), CF201 (Narrow).
The WIDE (high level) and NARROW (low level) data is
output from IC311 (microcomputer) pin 14.
Regardless of NARROW or WIDE band selection, signals
always pass through the filter, CF200.
When the WIDE band is selected, Q201 is turned ON, then
D202 and D203 are turned OFF.
So, the signal does not pass through the filter CF201. When the NARROW band is selected, Q201 is turned OFF, then D202 and D203 are turned ON. So, the signal passes through the filters, CF200 and CF201.
Q202 turns on/off with the Wide/Narrow data and the IC200 detector output level is changed to maintain a constant output level during wide or narrow signals.
Fig. 2 Receiver section / 图2 接受部构成
3-3.宽 / 窄转换电路
可以通过开启陶瓷滤波器 CF200(宽),CF201(窄)对每一
个信道进行窄宽设定。
IC311(微电脑)的管脚 14 输出宽(高电平)和窄(低电平)
信号。
无论选用宽还是窄带,信号都要通过滤波器 CF200。 当选用 WIDE 带宽时,D202 和 D203 关断。
因此,信号不通过滤波器 CF201。当选用 NARROW 带宽时, Q201 关断,D202 和 D203 打开。因此,信号通过滤波器 CF200 和 CF201。
Q202 伴随着宽 /窄数据而接通 /断开,IC200 检测器输出电平 经常变化用来维持宽或窄信号过程中的恒定输出电平。
R255
R264
R221
R256
CD200
C221
IC200
QUAD
IFOUT
AFOUT
MIXOUT
IFIN
5R
AFOUT
R222
Q202
5CNS
W/N
Fig. 3 Wide/Narrow changeover circuit
图3 宽/窄转换电路
Q201
CF200
D202 D203
R208
R210
CF201
R211
C206
R213
C210
R216
11
TK-3148
CIRCUIT DESCRIPTION / 电路说明
3-4. Audio amplifier circuit
The demodulated signal from IC200 goes through the mute switch (Q204) and is amplified by IC300 (2/2), high-pass filtered, low-pass filtered, high-pass filtered, band-eliminate filtered, and de-emphasized by IC500.
The signal then goes through an AF amplifier IC305 (2/2), an electronic volume control (IC307), and an AF switch (Q308 is on), and is routed to audio power amplifier (IC313), where it is amplified and output to the internal speaker.
The audio mute signal (AM) from the shift register becomes Low in the standby and Q302 and Q305 which are power supply circuit for IC313 turn off. Also, IC500 is set to the power down mode according to data from microprocessor, and the AF signal is muted. When the audio is output, AM becomes High to turn Q302 and Q305 ON, and voltage is supplied to power terminal VP of IC313. Also, IC500 is canceled out of the power down mode.
The speaker is switched by the logic of speaker switching terminal SSW on the universal connector. When SP-MIC is not attached, the logic of SSW becomes High and SW (Q308) is turned ON, and the AF signal is input to both amplifiers of IC313.
When SP-MIC is attached, SSW is connected to GND at inside of SP-MIC. For this reason, Q308 is turned OFF, and the AF signal is input only to amplifier for EXT SP of IC313.
3-4.音频放大器电路
来自于IC200 的解调信号进入静音开关(Q204),并且被IC300
(2/2)放大,被 IC500 高通滤波,低通滤波,高通滤波,带阻滤
波和去加重。
然后信号通过音频放大器 IC305(2/2),电子音量控制器 (IC307)和音频开关(Q308接通),并且发送到音频功率放大器 (IC313),被放大后输出到内置扬声器。
来自于位移存储器的音频静音信号(AM)待机时变为低电
平,给 IC313 供电的电路 Q302和 Q305 断开。同时,IC500 按照 来自于微处理器的数据被设定为低功率模式,音频信号处于被 静音状态。当输出音频时,音频静音信号变为高电平并接通Q302 和 Q305,并向 IC313 的功率端点 VP提供电压。同时,IC500 取 消低功率模式。
扬声器被通用接口上的扬声器开关端点 SSW 的逻辑电路开
启。当扬声器-话筒不接上时,SSW的逻辑电路变为高电平且SW
(Q308)被接通,同时信号被输入到 IC313 的两个放大器。
当扬声器 - 话筒接上时,SSW与扬声器 - 话筒内的地线连接。
因此,Q308 断开,音频信号只输入到 IC313 的 EXT SP 放大器。
Change of INT/EXT SP refer to Fig. 4.
AM SSW VC1 VC2 SP
HH HL INT HL LHEXT
LH LLMUTE LL LLMUTE
SB
AF
AM
Q303
Q302
SW
Q307
有关 INT/EXT SP 的变化参见图 4。
AM SSW VC1 VC2 SP
HH H L INT HL LHEXT LH L L LL LL静音
VP 5
INT.SP
VC1
2
EXT.SP
VC2
8
IC313
静音
12
SSW
Q305
Fig. 4 Audio amplifier circuit / 图4 音频放大器电路
CIRCUIT DESCRIPTION / 电路说明
TK-3148
3-5. Squelch circuit
The output from IC200 enters FM IF IC again, then passed through a band-pass filter. And passed through a band-pass filter IC202 (2/2). The modulation input. The noise component output from IC202 (2/2) is amplified by Q208 and rectified by D201 to produce a DC voltage corresponding to the noise level. The DC voltage is sent to the analog port of the CPU (IC309). And IC200 outputs a DC voltage (RSSI) corresponding to the input of the IF amplifier. The CPU reads the RSSI signal via pin
93.
IC309 determines whether to output sounds from the speaker by comparing the input voltage of pin 91 and pin 93 with the preset value.
IC200 : FM IF IC
IF AMP
DET
RSSI
12
BPF
AMP
7
IC202
(2/2)
BPF
AMP
3-5.静噪电路
IC200 的输出再次进入调频中频芯片,然后通过片上的带通 滤波器。并通过带通滤波器 IC202(2/2)。调制输入。IC202(2/ 2)输出的噪音成分被Q208 放大并且被 D201 整流生成一个相对 应于噪音电平的直流电压。直流电压被发送到 CPU(IC309)的 模拟端口。IC200生成一个相对应于中频放大器输入的直流电压
(RSSI)。CPU 通过管脚 93 读取 RSSI。
IC309将管脚91 和管脚 93的输入电压与预设值进行比较后决 定是否通过扬声器输出声音。
91
IC309
Q208
NOISE
AMP
D201
DET
CPU
93
SQ voltage
SQ close
SQ open
ANT input level
Fig. 6 Squelch and RSSI voltoge vs ANT input level /
图6 静噪和 RSSI 电压与 ANT 输入电平
4. Transmitter System
4-1. Microphone amplifier
The signal from the internal microphone goes through the
mute switch (Q301).
When the SP-MIC is not attached, the microphone switching terminal (MSW) on the universal connector becomes High, and mute switch (Q301) is turned ON. When the SP­MIC is attached, MSW is connected to GND at inside of SP­MIC. For this reason, Q301 is turned OFF, the internal microphone is muted, and only the input of the external microphone is supplied to the microphone amplifier of the TX­RX unit.
The signal from microphone passes through the limited circuit in D508 and amplified by IC501 (1/2), Microphone mute switch (Q502 is off in TX) and through the high-pass filter, the ALC circuit, the low-pass filter, the high-pass filter, and pre­emphasis/ IDC circuit in IC500 on the small board. When encoding DTMF, mute switch (Q500) is turned OFF for muting the microphone input signal.
The signal passes through the D/A converter (IC307) for the maximum deviation adjustment, and enters the summing amplifier consisting of IC305 (1/2), and is mixed with the low speed data from the CPU (IC309).
RSSI voltage
Preset value
Preset balue
ANT input level
4.发射部系统
4-1.话筒放大器
来自于内置话筒的信号进入静音开关(Q301)。 当扬声器 - 话筒不接上时,通用接口上的话筒开关端点
(MSW)变为高电平,静音开关(Q301)接通。当扬声器 -话筒
接上时,MSW与扬声器-话筒内的地线连接。因此,Q301断开, 内置话筒静音,并且只有外置话筒的输入提供给TX-RX 单元的 话筒放大器。
来自麦克风的信号通过 D508 中的限幅电路,经过 IC501 (1/
2) 放大、麦克风静音开关(发射时Q502 关断),通过高通滤波 器,ALC 电路,低通滤波器,高通滤波器,以及小板 IC500 上 的预加重/IDC 电路。当编码 DTMF 时,静音开关(Q500)关闭, 以阻断麦克风输入信号。
信号通过数 / 模转换器(IC307)进行最大频偏调整,然后进 入由IC305(1/2)组成的总和放大器,并且与来自于CPU(IC309) 的低速率数据混合。
13
TK-3148
CIRCUIT DESCRIPTION / 电路说明
The output signal from the summing amplifier passes through the D/A converter (IC307) again and goes to the VCO modulation input.
The other output signal from the summing amplifier passes through the D/A converter (IC307) again for the BAL adjustment, and the buffer amplifier (IC302 (2/2)), and goes to the TCXO modulation input.
EXT. MIC
Q301 D501
MIC
SW
MIC
Q305
MIC
MUTE
PTTMSW
Q502
LIMIT
IC501 (1/2)
LPF
12
Fig. 7 Microphone amplifier / 图7 话筒放大器
4-2. Drive and Final amplifier
The signal from the T/R switch (D101 is on) is amplified by the pre-drive (Q100 and Q101) and drive amplifier (Q103) to 50mW.
The output of the drive amplifier is amplified by the RF power amplifier (Q106) to 4.0W (1W when the power is low). The RF power amplifier is MOS FET transistor.
The output of the RF power amplifier is then passed through the harmonic filter (LPF) and antenna switch (D102, D103 is on) and applied to the antenna terminal.
Q100,Q101 Q103 Q106
From
T/R SW
(D101)
+B
Pre-DRIVE
AMP
R119
DRIVE
AMP
来自于加法放大器的输出信号再次通过数/模转换器(IC307)
并进入 VCO 调制输入。
来自于总和放大器的其他输出信号再次通过数 / 模转换器
(IC307)进行 BAL 调整,并通过缓冲放大器(IC302 2/2),然后
进入 TCXO 调制输入。
IC500
HPF
I5
IC307
D/A
O5
15
ALC
IC305 (1/2)
LSD DI9
SUM AMP
16
MUTE
Q13
18 19
COMP
DTMF
SW
IC307
I2
IC307 IC303(1/2)
I1
98
LPF HPF IDC
D/A
D/A
VCO
O2
BUFF
AMP
O1
PRE
EMP
6
TCXO
4-2.驱动和末级放大器
来自于 T/R 开关(D101 接通)的信号被前置驱动(Q100 和
Q101)和驱动放大器(Q103)放大到 50mW。
驱动放大器的输出被射频功率放大器(Q106)放大到4.0W(当 低功率时为1W)。射频功率放大器是 MOS FET 晶体管。 然后射 频功率放大器的输出通过谐波滤波器(LPF)和天线开关(D102, D103 接通)提供给天线端点。
ANT
D102,D103
RF
POWER AMP
VDD
VGG
ANT
SW
LPF
R120
R123
IC100
REF
(1/2)
VOL
(IC307)
Fig. 8 Drive and final amplifier and APC circuit /
图8 驱动和末级放大器和自动功率控制电路
4-3. APC circuit
The APC circuit always monitors the current flowing through the drive amplifier (Q103) and the RF power amplifier (Q106) and keeps a constant current.
The voltage drop at R119, R120 and R123 are caused by the current flowing through the RF power amplifier and this voltage is applied to the differential amplifier (IC100 1/2).
IC100 (2/2) compares the output voltage of IC100 (1/2) with the reference voltage from IC307, and the output of IC100 (2/
2) controls the VGG of the RF power amplifier to make the both voltages to same voltage.
The change of power high/low is carried out by the change of the reference voltage. Q105, Q107 and Q108 are turned on in transmit and the APC circuit is active.
14
IC100
(2/2)
4-3.自动功率控制电路
APC 电路保持监测通过驱动放大器(Q103)和射频功率放大 器(Q106)的电流,并保持其稳定。流经射频功率放大器的电 流使 R119,R120 和 R123 的电压降低并且此电压提供给差分放 大器(IC100 1/2)。
IC100(2/2)将IC100(1/2)的输出电压与来自于IC307 的参 考电压进行比较,IC100(2/2)的输出控制射频功率放大器的 VGG 使两种电压保持一致。
通过改变参考电压来进行高 / 低功率的修改。发送时 Q105, Q107 和 Q108 接通并且自动功率控制电路被激活。
CIRCUIT DESCRIPTION / 电路说明
TK-3148
5. Frequency Synthesizer Unit
5-1. Frequency synthesizer
The frequency synthesizer consists of the TCXO (X1), VCO,
PLL IC (IC1) and buffer amplifiers.
The TCXO generates 16.8MHz. The frequency stability is
2.5ppm within the temperature range of –30 to +60˚C. The frequency tuning and modulation of the TCXO are done to apply a voltage to pin 1 of the TCXO. The output of the TCXO is applied to pin 8 of the PLL IC.
The TK-3148’s VCO consists of 2VCO and covers a dual range of the 305.15~445.15MHz and the 350~390MHz. The VCO generates 405.15~425.15MHz for providing to the first local signal in receive. The operating frequency is generated by Q3 in transmit mode and Q2 in receive mode.
The oscillator frequency is controlled by applying the VCO control voltage, obtained from the phase comparator (IC1) to the variable capacitor diodes (D1, D3, D7, and D8 in transmit mode and D2, D4, D9 and D10 in receive mode).
The T/R pin of IC312 goes “high” in receive mode causing Q4, Q6 and Q3 to turn off, and Q2 turn on. The T/R pin goes “low” in transmit mode.
The outputs from Q2 and Q3 are amplified by buffer amplifier (Q5) come to the amplifiers.
The PLL IC consists of a prescaler, fractional divider, reference divider, phase comparator, charge pump. This PLL IC is fractional-N type synthesizer and performs in the 40,50 or 60kHz reference signal which is eighth of the channel step (6.25kHz). The input signal from the pins 5 and 8 of the PLL IC is divided down to the 50kHz and compared at phase comparator. The pulsed output signal of the phase comparator is applied to the charge pump and transformed into DC signal in the loop filter (LPF). The DC signal is applied to the pin 1 of the VCO and locked to keep the VCO frequency constant.
PLL data is output from DP (pin 73). CP (pin 74) and EP (pin
72) of the microprocessor (IC309). The data are input to the PLL IC when the channel is changed or when transmission is changed to reception and vice versa.
5.频率合成器单元
5-1.频率合成器
频率合成器由 TCXO(X1),VCO,PLL IC(IC1)和缓冲放
大器组成。
TCXO产生16.8MHz的频率。在-30到+60℃的温度范围内, 频率稳定性为2.5ppm。TCXO的频率调谐和调制是通过给TCXO 的管脚 1 提供电压来实现的。TCXO 的输出提供给 PLL IC 的管 脚8。
TK-3148的VCO由两个VCO组成,并且控制两个范围,305.15-
445.15MHz 和350-390MHz。VCO 产生 405.15-425.15MHz 的频率 提供给接收中的第一本振信号。在发送中,VCO 的管脚3 变为 低电平,VCO 产生 350-390MHz 的频率。
由Q3在发送模式下产生工作频率和 Q2 在接收模式下产生工 作频率。
通过在可变电容二极管(发送模式下为 D1、D3、D7 和 D8, 接收模式下为 D2、D4、D9和 D10)上施加从相位比较器(IC1) 获得的 VCO 控制电压来控制振荡频率。
在接收模式下 IC312 的 T/R 脚变为“高”电平,从而关断 Q4、 Q6 和 Q3、打开 Q2。在发送模式下,T/R 脚变为“低”电平。来 自 Q2 和 Q3 的输出经过缓冲放大器(Q5)放大后进入放大器。
PLL IC 由预标定器,分级驱动器,参考驱动器,相位比较器 和负载增压组成。PLL IC 是 N 级合成器,并且以第 8 级信道
(6.25kHz)频率为 40,50 或 60kHz 的参考信号运行。来自于 PLL
IC的管脚 5 和管脚 8的输入信号被分割为 50kHz,并且在相位比 较器中进行比较。相位比较器的脉冲输出信号提供给负载增压, 并且被变压后进入环路滤波器(LPF)中的直流信号。直流信号 提供给 VCO 的管脚 1 并被锁定,以保持 VCO 频率的稳定性。
微处理器(IC309)的DP(管脚 73),C P(管脚 74)和EP(管 脚72)输出PLL 数据。当信道改变或发送变为接收和声音反转 时,数据被输入到 PLL IC。
T/R
(TX : Low)
LPF
UL
CPU
IC309
T/R
VCO
DP,CP,EP
18
CV
IC1
PLL
8
5
BUFF
TCXO
Q8
BUFF
Q1
To mixer
MB
X1
SW
IC302
D101
SW
D100
To drive amp
FC
BAL
Fig. 9 PLL block diagram / 图9 锁相环方块图
15
TK-3148
CIRCUIT DESCRIPTION / 电路说明
6. Control Circuit
The control circuit consists of microprocessor (IC309) and its peripheral circuits. It controls the TX-RX unit and transfers data to and from the display unit. IC309 mainly performs the following;
1) Switching between transmission and reception by PTT signal input.
2) Reading system, group, frequency, and program data from the memory circuit.
3) Sending frequency program data to the PLL.
4) Controlling squelch on/off by the DC voltage from the squelch circuit.
5) Controlling the audio mute circuit by decode data input.
6) Transmitting tone and encode data.
6-1. Memory circuit
Memory circuit consists of the CPU (IC309) and a flash memory (IC308), a flash memory has a capacity of 4M bits that contains the transceiver control program for the CPU and data such as transceiver channels and operating features.
This program can be easily written from an external devices. Data. such as operating status, are programmed into the EEPROM (IC310).
Flash Memory
Note : The flash memory stores the data containing the FPU
(KPG-74D CPS) program, Security Number (MPT Serial Number) and firmware program (User mode, Test mode, Tuning mode, etc.). This data must be reinstalled when replacing the flash memory.
6.控制电路
控制电路由微处理器(IC309)和其外围电路组成。微处理器 控制TX-RX单元和发送到显示单元的数据以及从显示单元发送 的数据。IC309 主要执行下述功能∶
1) 通过 PTT 信号输出在发射和接收之间转换。
2) 从存储器电路读取系统,组,频率和编程数据。
3) 向 PLL 发送频率编程数据。
4) 通过来自于静噪电路的直流电压控制静噪的开启 / 关闭。
5) 通过解码数据输入控制音频静音电路。
6) 发送音频和编码数据。
6-1.存储器电路
记忆电路由 CPU (IC309) 和一块闪存(IC308)组成。闪存容 量4MB,载有 CPU 所需的收发机控制程序以及收发机信道、功 能设置等数据。
可以方便地使用外部设备写这个程序。工作状态等数据编写 在 EEPROM (IC310)中。
闪存
注释∶闪存保存的数据包括 FPU(KPG-74D CPS)程序,安全码
(MPT序列号)和固件编程(用户模式,测试模式,调谐模式等)。
当更换闪存时,必须重新安装数据。
EEPROM
Note : The EEPROM stores tuning data (Deviation, Squelch,
etc.). Realign the transceiver after replacing the EEPROM.
IC309
CPU
FLASH
IC308
Fig. 10 Memory circuit / 图10 存储器电路
6-2. Low battery warning
The battery voltage is monitored by the microprocessor (IC309). When the battery voltage falls below the voltage set by the Low Battery Warning adjustment, the red LED flashes to notify the operator that it is time to replace the battery. If the battery voltage falls even more (approx. 6.1V), a beep sounds and transmission is stopped.
Low battery warning
The red LED flashes during transmission
The red LED flashes and continuous beep sounds while PTT pressed
Battery condition
The battery voltage is low but the transceiver is still usable.
The battery voltage is low and the transceiver is not usable to make calls.
EEPROM
注释∶EEPROM 保存调谐数据(频偏,静噪)。
更换 EEPROM 后重新调校手持机。
IC310
EEPROM
6-2.电池低压告警
通过微处理器(IC309)监视电池电压。当电池的电压低于通 过电池低压告警调整设定的电压时,红色指示灯闪烁以提示操 作者更换电池。如果电池的电压继续降低(大约 6.1V),则发出 beep 音并停止发送。
电池低压告警 电池状态
发射过程中红色指示灯闪烁。
当按下 PTT 键时红色指示灯闪 电池电压降低不能使用手持 烁并且手持机发出连续 beep 音。 机发出呼叫。
电池电压降低但仍可使用手 持机。
16
CIRCUIT DESCRIPTION / 电路说明
TK-3148
7. Signalling Circuit
7-1. Encode
Low-speed data (QT,DQT)
Low-speed data is output from pin 1 of the CPU. The signal passes through a low-pass CR filter, and goes to the summing amplifier (IC305 1/2). The signal is mixed with the audio signal and goes to the VCO and TCXO (X1) modulation input after passing through the D/A converter (IC307) for BAL adjustment.
High-speed data (DTMF)
High-speed data is output from pin 2 of the CPU. The signal passes through a low-pass filter consisting of IC304, and provides a TX DTMF tone and a RX DTMF tone TX DTMF deviation making an adjustment by microprocessor is passed through the D/A convertor (IC307), and then applied to the audio processor (IC500).
The signal is mixed with the audio signal and goes to the VCO and TCXO, the RX DTMF tone is passed a summing amplifier (IC305 2/2), the D/A converter (IC307) for audio control, audio power amplifier and then to the speaker.
FFSK
ESN utilizes 1200bps FFSK signal. FFSK signal is output from pin 6 of IC500. The signal passes through the D/A converter (IC307) for the FFSK deviation adjustment. and is routed to the VCO. When encoding FFSK, the microphone input signal is muted.
7.信令电路
7-1.编码
低速率数据(QT,DQT)
CPU 的管脚 1输出低速率数据。信号通过低通陶瓷滤波器进 入总和放大器(IC305 1/2)。此信号与音频信号混合,通过数 / 模转换器(IC307)进行BAL调整后进入 VCO 和TCXO(X1)调 制输入。
高速率数据(DTMF)
CPU 的管脚 2 输出高速率数据。信号通过 IC304 组成的低通 滤波器,并提供 TX DTMF 音频和 RX DTMF 音频。通过微处理 器调整 TX DTMF频偏并进入数 / 模转换器(IC307),然后提供 给音频处理器(IC500)。
此信号与音频信号混合后进入 VCO 和 TCXO,RX DTMF 通 过总和放大器(IC305 2/2),数 / 模转换器(IC307)进行音频控 制,音频功率放大器,然后进入扬声器。
FFSK
ESN使用1200bps FFSK信号。IC500的管脚6输出FFSK信号。 此信号通过数/ 模转换器(IC307)进行 FFSK 频偏调整,然后进 入VCO。当编码 FFSK 时,话筒输入信号为静音。
IC309
CPU
IC304
2
LSD OUT
1
HSD OUT
LPF
IC305 (1/2)
Fig. 11 Encode / 图11 编码
7-2. Decode
Low-speed data (QT,DQT)
The demodulated signal from the IF IC (IC200) is amplified by IC300 (2/2) and passes through a low-pass filter (IC306) to remove audio components. The signal is input to pin 95 of the CPU.
The CPU digitizes this signal, performs processing such as DC restoration, and decodes the signal.
RX Audio
SUM
IC305 (2/2)
SUM
I6
I3
O5
I2
D/A (ADJ)
IC307
O6
O3
O2
O1
AF AMP
IC500
SUM
I5
MIC IN
MD
VCO
IC302
BUFF
AMP
MB
X1
TCXO
7-2.解码
低速率数据(QT,DQT)
来自于中频芯片(IC200)的已解调的信号被IC300(2/2)放 大,然后通过低通滤波器(IC306)消除音频成分。此信号被输 入到 CPU 的管脚 95。
CPU使信号数字化,执行诸如直流恢复和解码信号这样的步 骤。
17
TK-3148
CIRCUIT DESCRIPTION / 电路说明
FFSK
The FFSK input signal from the IF IC is amplified by IC300 (1/ 2) and goes to pin 5 of IC500. The signal is demodulated by FFSK demodulator in IC500. The demodulated data goes to the CPU for processing.
IC500
AF IC
IC300
AMP
IC500
XOUT
IC306
LPF
IC301
DTMF
DECODE
OSC1
PD
Fig. 12 Decode / 图12 解码
8. Power Supply Circuit
Battery +B is supplied via a 3A fuse from the battery terminal connected to the TX-RX unit. After passing through the power switch, power supply (SB) is applied to the three AVRs. IC5 supplies 5V (5M) to the control circuit, and IC9 supplies 5V (5C) to common circuits. IC6 supplies to the TX circuit, the RX circuit and common circuits of needless save mode. During transmission, 5TC becomes Low and Q405 is turned ON to supply 5V (5T) to the TX circuit. During reception, 5RC becomes Low and Q404 is turned ON to supply 5V (5R) to the RX Circuit.
The power supply voltage monitor IC (IC404) monitors power supply voltage (SB). If the voltage falls (less than 5V), the VOUT port goes “LOW” level, the CPU INT port also goes “LOW” level, and the CPU stops.
FFSK
来自于中频芯片的FFSK 输入信号被 IC300(1/2)放大,然后 进入IC500 的管脚 5。此信号被IC500中的FFSK 解调器解调。已 解调的数据进入 CPU 执行操作。
IC303
BPF
DCK,SD,STD
IC201
BPF
23
11
LSD IN
IC307
CPU
IC312
3
HSD
IN
DT,CK,CE
8.电源电路
经由来自于连接到 TX-RX 单元的电池端点的3A 保险丝提供 电池+B。通过电源开关后,电源(SB)向 3个 AVRs提供电压。 IC5向控制电路提供5V(5M)电压,IC9向共用电路提供5V(5C) 电压。IC6 向 TX 电路,RX 电路和共用电路的保存模式提供电 压。在发送过程中,5TC 变为低电平,且 Q405 接通并向 TX 电 路提供5V(5T)电压。在接收过程中,5RC变为低电平,且 Q404 接通并向 RX 电路提供 5V(5R)电压。
电源电压监测 IC(IC404)监测电源电压(SB)。如果电压下 降(低于 5V),则 VOUT 端口变为“低”电平,CPU INT 端口 也变为“低”电平,CPU 停止运行。
18
F400
+B
SB
ON/OFF
VOL
RF power amp (Q103 and Q106)
D405
IC401
R740
IC404
IC403 CE
IC402 CE
IC400
Q405
5TC
Q404
5RC
R403
C425
5C
5T
5R
5CNS
14
10
71
VCC
RESET
IC309
CPU
INT
Fig. 13 Power supply circuit / 图13 电源电路
TK-3148

SEMICONDUCTOR DATA / 半导体数据

Microprocesser : 30620M8A-2N3GP
(TX-RX UNIT : IC309)
Pin function
Pin Port
No. Name
1 LSDO O Low speed data output. 2
HSDO 3 HSDI I High speed data input. 4
DSTB 5 5RC O RX power control. H: TX L: RX 6 BYTE - +5V. 7 CNVSS - GND. 8 AFDAT O MODEM MSK encode data output. 9 AFRDT I MODEM MSK decode data input.
10 RESET - Key scan IC reset output. 11 XOUT - CPU clock. 12 VSS - GND. 13 XIN - CPU clock. 14 VCC - +5V. 15 - - NC (Non connect). 16 DTSTD I DTMF decode IC data detect input.
17 AFTRD I
18 AFRTM I
19 EEPDAT I/O EEPROM data output. 20 BEEP O Beep data output. 21 SKEY I [S] Key input. 22 AKEY I [A] Key input. 23 BKEY I [B] Key input. 24 CKEY I [C] Key input. 25 AUX I [AUX] Key input. 26 PTT I [PTT] Key input. 27 SIDE2 I [SIDE2] Key input. 28 SIDE1 I [SIDE1] Key input. 29 AUXTXD I NC (Non connect). 30 UL I PLL unlock detect input. 31
DTMDAT
32 DTCLK O DTMF decode IC clock output.
33 TXD O
34 RXD I
35 DAT O Common data output 36 CLK O Common clock output. 37 RDY - Not used. 38 ALE - Not used. 39 HOLD - Not used. 40 HLDA - Not used. 41 BLCK - Not used. 42 RD O Flash memory RD bus. 43 BHE - Not used. 44 WR O Flash memory WR bus. 45 SAVE O Battery save output. 46 SELF I NC (Non connect). 47
CS/MODE
48 CS0 O Flash memory chip enable. 49 A19 - Not used.
I/O Function
O High speed data output.
O D/A converter data strobe output.
FFSK modulation data output timing pulse input. FFSK demodulation data input timing pulse input.
I DTMF decode IC data detect input.
External serial interface (COM0) TXD0 (To microphone connector). External serial interface (COM0) RXD0 (To microphone connector).
O LCD driver chip select output.
微处理器∶30620M8A-2N3GP
(TX-RX 单元∶IC309)
管脚功能
管脚号 端口名称 输入/输出 管脚功能
1 LSDO 输出 低速率数据输出 2HSDO 输出 高速率数据输出。 3 HSDI 输入 高速率数据输入。 4 DSTB 输出 D/A 转换器数据选通输出。 5 5RC 输出 接收供电控制。 H: 发射 L: 接收 6BYTE - +5V。 7 CNVSS - 接地。 8 AFDAT 输出 MODEM MSK 编码数据输出。
9 AFRDT 输入 MODEM MSK 译码数据输入。 10 RESET - 按键扫描 IC 复位输出。 11 XOUT - CPU 时钟。 12 VSS - 接地。 13 XIN - CPU 时钟。 14 VCC -+5V 15 - - NC (无连接)。 16 DTSTD 输入 DTMF 解码 IC 数据检测输入。 17 AFTRD 输入 FFSK 调制数据输出计时脉冲输入。 18 AFRTM 输入 FFSK 调制数据输入计时脉冲输入。 19 EEPDAT 20 BEEP 输出 beep 数据输出。 21 SKEY 输入 [S] 按键输入。 22 AKEY 输入 [A] 按键输入。 23 BKEY 输入 [B] 按键输入。 24 CKEY 输入 [C] 按键输入。 25 AUX 输入 [AUX] 按键输入。 26 PTT 输入 [PTT] 按键输入。 27 SIDE2 输入 [侧面2] 按键输入。 28 SIDE1 输入 [侧面1] 按键输入。 29
AUXTXD
30
UL
31
DTMDAT
32 DTCLK 输出 DTMF 解码芯片时钟输出。
33 TXD 输出
34 RXD 输入
35 DAT 输出 公共数据输出。 36 CLK 输出 共用时钟输出。 37 RDY - 不使用。 38 ALE - 不使用。 39 HOLD - 不使用。 40 HLDA - 不使用。 41 BLCK - 不使用。 42 RD 输出 闪速存储器 RD 总线。 43 BHE - 不使用。 44 WR 输出 闪速存储器 WR总线。 45 SAVE 输出 电池省电模式输出。 46 SELF 输入 NC (无连接)。 47
CS/MODE 48 CS0 输出 闪存芯片有效。 49 A19 - 不使用。
输入 / 输出
EEPROM 数据输出。
输入 NC (无连接)。 输入 PLL 失锁检测输入。 输入 DTMF 解码 IC 数据检测输入。
外部串行接口。(COM0) TXD0 (麦克 风接口)。 外部串行接口。(COM0) RXD0 (麦克 风接口)。
输出 LCD 驱动程序芯片选择输出。
19
TK-3148
SEMICONDUCTOR DATA / 半导体数据
Pin Port No. Name
50~59
A18~A9 - Flash memory address bus. 60 Vcc - +5V. 61 A8 O Flash memory address bus. 62 VSS - GND.
63~70
A7~A0 O Flash memory address bus. 71 INT I Voltage detect input. 72 EP O PLL IC Data strobe output. 73 DP O PLL IC Data output. 74 CP O PLL IC Clock output.
75~78
EN4~1 I Rotary SW input 4~1.
79~86
D7~D0 I Flash memory data bus. 87 PF I SP-Mic PF switch input. 88 VOL I Volume level input. 89 BATT2 I Battery distinction input. 90 BATT1 I Battery voltage input. 91 ASQL I Squelch level input. 92 TEMP I Thermistor input.
93 RSSI I
94 AVSS - GND. 95 LSDI I Low speed data input. 96 VREF - +5V. 97 AVCC - +5V. 98
SFTSTB1 99 OE O Shift register output enable output.
100 AFSTB O MODEM data strobe output.
I/O Function
Received signal strength indicator input (RSSI).
O Shift register Data strobe output.
管脚号 端口名称输入 / 输出 管脚功能
50~59
A18~A9 - 闪存地址总线。 60 VCC -+5V。 61 A8 输出 闪存地址总线。 62 VSS - 接地。
63-70 A7-A0 输出 闪存地址总线。
71 INT 输入 电压检测输入。 72 EP 输出 PLL 芯片数据选通输出。 73 DP 输出 PLL IC 数据输出。 74 CP 输出 PLL IC 时钟输出。
75~78
EN4~1 输入 旋转开关输入 4~1.
79~86
D7~D0 输入 闪存数据总线。 87 PF 输入 扬声器 - 麦克风编程功能开关输入。 88 VOL 输入 音量电平输入。 89 BATT2 输入 电池差异输入。 90 BATT1 输入 电池电压输入。 91 ASQL 输入 静噪电路电平输入。 92 TEMP 输入 热敏电阻输入。
93 RSSI 输入
接收到的信号强度指示
输入(RSSI)。 94 AVSS - 接地。 95 LSDI 输入 低速率数据输入 。 96 VREF - + 5V。 97 AVCC - + 5V。 98 SFTSTB1 输出 位移寄存器数据选通输出。 99 OE 输出 移位寄存器输出启用输出。
100 AFSTB 输出 MODEM 数据选通输出。
20
TK-3148

COMPONENTS DESCRIPTION / 元件说明

TX-RX UNIT (X57-6413-10)
Ref. No.
IC100 IC APC AMP
IC200 IC IF IC
IC201 IC AF AMP Filter
IC300 IC AF AMP Filter
IC302 IC AF AMP Filter
IC303 IC AF AMP Filter
IC304 IC AF AMP Filter
IC305 IC AF AMP Filter
IC306 IC AF AMP Filter
IC307 IC Potential Meter
IC308 IC Flash Memory
IC309 IC Microprocessor
IC310 IC EEPROM
IC311,312
IC313
IC400 IC Detector
IC401 IC 5M AVR(Automatic Voltage Regulator)
IC402 IC 5CNS AVR(Automatic Voltage Regulator)
IC403 IC 5C AVR(Automatic Voltage Regulator)
IC404 IC Detector
IC500 IC Base Band
IC501 IC AF AMP Filter
Q100
Q101
Q103 FET TX Drive AMP
Q104,105
Q106 FET TX Final AMP
Q107 FET APC Switch
Q108
Q201
Q202
Q203 FET AF detect switch
Q204 FET DM switch
Q205
Q206 FET Front-end 1st mixer
Q207 FET Front-end RF AMP
Q208
Q300
Q301 FET Mic mute
Q302
Q303
Q304
Q305 FET Internal / External. switch
Use/Function
IC1 IC PLL IC
IC Shift Registor
IC
Q1
TRANSISTOR
Q2 FET RX VCO oscilstion
Q3 FET TX VCO oscilstion
Q4 FET VCO switch
Q5
TRANSISTOR
Q6
TRANSISTOR
Q7
TRANSISTOR
Q8
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
AF Power AMP
Fin RF AMP
Buffer AMP
VCO switch
Ripple filter
TX/RX common RF AMP
Pre-drive AMP
Pre-drive AMP
APC Switch
APC Switch
W/N Switch
W/N Switch
IF AMP
Noise AMP
Beet shift Switch
AF AMP AVR switch
AF AMP AVR
LCD AVR
Operation/Condition
TX-RXTX-RX
TX-RX
TX-RXTX-RX
单元单元
单元
单元单元
((
X57-6413-10X57-6413-10
X57-6413-10
((
X57-6413-10X57-6413-10
))
))
Ref. No. 使用/功能 操作/状态
IC1 IC PLL IC IC100 IC 自动功率控制放大器 IC200 IC 中频 IC IC201 IC 音频放大器滤波器 IC300 IC 音频放大器滤波器 IC302 IC 音频放大器滤波器 IC303 IC 音频放大器滤波器 IC304 IC 音频放大器滤波器 IC305 IC 音频放大器滤波器 IC306 IC 音频放大器滤波器 IC307 IC 电位计 IC308 IC 闪速存储器 IC309 IC 微处理器 IC310 IC EEPROM
IC311,312
IC 移位寄存器 IC313 IC 音频功率放大器 IC400 IC 探测器 IC401 IC 5M 自动调压器 IC402 IC 5CNS 自动调压器 IC403 IC 5C 自动调压器 IC404 IC 探测器 IC500 IC 基带 IC IC501 IC 音频放大器滤波器
Q1 晶体管 Fin 射频放大 Q2 场效应管 接收 VCO 振荡 Q3 场效应管 发射 VCO 振荡 Q4 场效应管 VCO 开关 Q5 晶体管 缓冲放大器 Q6 晶体管 VCO 开关 Q7 晶体管 脉动滤波器
Q8 晶体管 发射 / 接收公用射频放大 Q100 晶体管 前驱动放大器 Q101 晶体管 前驱动放大器 Q103 场效应管 发射驱动放大器
Q104,105 晶体管 自动功率控制开关
Q106 场效应管 发射最终放大器 Q107 场效应管 自动功率控制开关 Q108 晶体管 自动功率控制开关 Q201 晶体管 宽/窄开关 Q202 晶体管 宽/窄开关 Q203 场效应管 音频检测开关 Q204 场效应管 DM 开关 Q205 晶体管 中频放大器 Q206 场效应管 前端第一混频器 Q207 场效应管 前端射频放大 Q208 晶体管 噪音放大器 Q300 晶体管 Beet 偏移开关 Q301 场效应管 麦克风静音 Q302 晶体管 音频放大自动调压器开关 Q303 晶体管 音频放大自动调压器 Q304 晶体管 LCD 自动调压器 Q305 场效应管 内 / 外 . 开关
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TK-3148
COMPONENTS DESCRIPTION / 元件说明
Ref. No.
Q306
Q307 FET Internal / External. switch
Q308 FET Internal / External. switch
Q309
Q310
Q311
Q400 FET 5MS switch
Q401 FET 5MS switch
Q403
Q404 FET 5R Switch
Q405
Q406 FET SAVE switch
Q500
Q501 FET TX AF mute
Q502 FET Mic mutte
D7,8
D9,10
D100,101 DIODE TX/RX RF switch
D102-105 DIODE ANT switch
D106
D200 DIODE SQL (Squelch) voltage charge
D201 DIODE SQL rectification
D202,203 DIODE W/N Switch
D204-208
D209 DIODE DM Charge/discharge switch
D300 DIODE AF AMP bias
D301 DIODE AF AMP protect
D302 DIODE Surge absorption
D303,304
D305
D306 DIODE Surge absorption
D307
D308
D309 LED TX red LED
D310 LED RX green LED
D402 DIODE Surge absorption
D403 DIODE 5MS protect switch
D405 DIODE 5M protect
D501 DIODE Mis input protect
Use/Function
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
TRANSISTOR
D1
VARIABLE CAPACITANCE DIODE
D2
VARIABLE CAPACITANCE DIODE
D3
VARIABLE CAPACITANCE DIODE
D4
VARIABLE CAPACITANCE DIODE
D5
VARIABLE CAPACITANCE DIODE
D6 DIODE Ripple filter switch
VARIABLE CAPACITANCE DIODE
VARIABLE CAPACITANCE DIODE
ZENER DIODE
VARIABLE CAPACITANCE DIODE
ZENER DIODE
ZENER DIODE
ZENER DIODE
ZENER DIODE
TX LED switch
BUSY LED switch
LCD LED AVR switch
LCD LED AVR
5R Switch
5T switch
RX AF mute
TX VCO
RX VCO
TX VCO
RX VCO
TX VCO modulation
TX VCO
RX VCO
APC protect
BPF (Band pass filter) Tuning
Protect
AF AMP AVR
Protect
Mic input protect
Operation/Condition
Ref. No. 使用/功能 操作/状态
Q306 晶体管 发射发光二极管开关 Q307 场效应管 内 / 外 . 开关 Q308 场效应管 内 / 外 . 开关 Q309 晶体管 BUSY LED 开关 Q310 晶体管 LCD LED AVR 开关 Q311 晶体管 LCD LED AVR Q400 场效应管 5MS 开关 Q401 场效应管 5MS 开关 Q403 晶体管 5R 开关 Q404 场效应管 5R 开关 Q405 晶体管 5T 开关 Q406 场效应管 SAVE 开关 Q500 晶体管 接收音频静音开关 Q501 场效应管 发射音频静音开关 Q502 场效应管 麦克风静音
D1
可变电容二极管
D2
可变电容二极管
D3
可变电容二极管
D4
可变电容二极管
D5
可变电容二极管
发射 VCO 接收 VCO 发射 VCO 接收 VCO 发射 VCO 调制
D6 二极管 脉动滤波器开关
D7,8
D9,10
可变电容二极管 可变电容二极管
发射 VCO 接收 VCO
D100,101 二极管 发射/接收射频开关
D102-105 二极管 天线开关
D106 齐纳二极管 自动功率控制保护 D200 二极管 SQL (抑制) 电压充电 D201 二极管 SQL 整流
D202,203 二极管 宽/窄开关
D204-208
可变电容二极管
BPF (带通滤波器) 调谐 D209 二极管 DM 充电 / 放电开关 D300 二极管 音频放大器偏置 D301 二极管 音频放大器保护 D302 二极管 浪涌吸收
D303,304 齐纳二极管 保护
D305 齐纳二极管 音频放大自动调压器 D306 二极管 浪涌吸收 D307 齐纳二极管 保护 D308 齐纳二极管 麦克风输入保护 D309 发光二极管 发射红发光二极管 D310 发光二极管 接收绿发光二极管 D402 二极管 浪涌吸收 D403 二极管 5MS 保护开关 D405 二极管 5M 保护 D501 二极管 麦克风输入保护
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