Kenwood TK-8108 User manual

TK-8108TK-8108
© 2001-7 PRINTED IN JAPAN
B51-8593-00 (S)620
UHF FM TRANSCEIVER / UHF调频对讲机
TK-8108
SERVICE MANUAL / 维修手册
Panel assy
(A62-0942-03)
Front glass
(B10-2668-03)
Cabinet
(A01-2178-02)
Key top
(K29-9065-01)
SPECIFICATIONS / 规格
GENERAL
Frequency Range ................................ C : 450 to 490MHz
C3 : 400 to 430MHz
Number of Channels ........................... 8 channels
Channel Spacing ................................. Wide : 25kHz
Narrow : 12.5kHz
PLL Channel Stepping ........................ 5, 6.25kHz
Operating Voltage ............................... 13.6V DC ±15%
Current Drain ......................................
Less than 0.4A on standby
Less than 1.0A on receive
Less than 8.0A on transmit
Operating Temperature Range ........... –30°C to +60°C
Dimensions & Weight ........................
160 (W) x 43 (H) x 107 (D) mm,
Approx 1.0kg
Channel Frequency Spread ................ C : 40MHz
C3 : 30MHz
RECEIVER
(Measurements made per EIA standard EIA/TIA-603)
Sensitivity (12dB SINAD) .................... Wide : 0.28µV
Narrow : 0.35µV
Selectivity ........................................... Wide : 75dB
Narrow : 65dB
Intermodulation................................... Wide : 70dB
Narrow : 60dB
Spurious Response ............................. 75dB
Audio Power Output ........................... 4.0W
Frequency Stability ............................. ±2.5ppm
TRANSMITTER
(Measurements made per EIA standard EIA/TIA-603)
RF Power Output ................................ 25W
Spurious and Harmonics..................... 70dB
Modulation .......................................... Wide : 16K0F3E
Narrow : 11K0F3E
FM Noise ............................................ Wide : 45dB
Narrow : 40dB
Audio Distortion .................................. Less than 3%
Frequency Stability ............................. ±2.5ppm CONTENTS
ADJUSTMENT ........................................................ 39
PC BOARD VIEWS
DISPLAY UNIT (X54-3340-20) ........................... 47
TX-RX UNIT (X57-6303-XX) .............................. 49
SCHEMATIC DIAGRAM ......................................... 55
BLOCK DIAGRAM................................................... 59
LEVEL DIAGRAM.................................................... 61
TERMINAL FUNCTION .......................................... 63
SPECIFICATIONS.................................BACK COVER
概述
频率范围 ....................................................... C : 450 〜 490MHz
C3 : 400 〜 430MHz
信道数量 ....................................................... 8 信道
信道间距 ....................................................... 宽 : 25kHz
窄 : 12.5kHz
锁相环电路步进频率 ................................. 5, 6.25kHz
工作电压 ....................................................... 13.6V 直流 ±15%
电流消耗 ....................................................... 备用时 : 低于0.4A
接收时 : 低于1.0A
接收时 : 低于8.0A
工作温度范围 .............................................. －30℃到＋60℃
尺寸和重量...................................................
160 (宽) x 43 (高) x 107 (长) 毫米,
约1.0kg
信道频率扩展 .............................................. C : 40MHz
C3 : 30MHz
接收部
(以每EIA标准EIA/TIA-603进行测量)
灵敏度 (12dB SINAD) .................................
宽 : 0.28µV 窄 : 0.35µV
选择性 ........................................................... 宽 : 75dB 窄 : 65dB
互调 ............................................................... 宽 : 70dB 窄 : 60dB
假信号响应................................................... 75dB
音频功率输出 .............................................. 4.0W
频率稳定性................................................... ±2.5ppm
发射部
(以每EIA标准EIA/TIA-603进行测量)
射频功率输出 .............................................. 25W
寄生和谐波................................................... 70dB
调制 ...............................................................
宽 : 16K0F3E 窄 : 11K0F3E
频率调制噪音 .............................................. 宽 : 45dB 窄 : 40dB
音频失真 ....................................................... 低于 3%
频率稳定性................................................... ±2.5ppm
GENERAL ................................................................. 2
OPERATING FEATURES ......................................... 5
REALIGNMENT...................................................... 11
DISASSEMBLY FOR REPAIR ................................ 14
CIRCUIT DESCRIPTION ......................................... 15
SEMICONDUCTOR DATA ..................................... 24
DESCRIPTION OF COMPONENTS ....................... 26
PARTS LIST............................................................ 29
EXPLODED VIEW ................................................... 37
PACKING ................................................................. 38
KENWOOD CORPORATION
14-6, Dogenzaka 1-chome, Shibuya-ku, Tokyo 150-8501, Japan
KENWOOD SERVICE CORPORATION
P.O. BOX 22745, 2201 East Dominguez Street, Long Beach, CA 90801-5745,
U.S.A.
KENWOOD ELECTRONICS CANADA INC.
6070 Kestrel Road, Mississauga, Ontario, Canada L5T 1S8
KENWOOD ELECTRONICS DEUTSCHLAND GMBH
Rembrücker Str. 15, 63150 Heusenstamm, Germany
KENWOOD ELECTRONICS BELGIUM N.V.
Mechelsesteenweg 418 B-1930 Zaventem, Belgium
KENWOOD ELECTRONICS FRANCE S.A.
13, Boulevard Ney, 75018 Paris, France
KENWOOD ELECTRONICS U.K. LIMITED
KENWOOD House, Dwight Road, Watford, Herts., WD1 8EB United Kingdom
KENWOOD ELECTRONICS EUROPE B.V.
Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands
KENWOOD ELECTRONICS ITALIA S.p.A.
Via G. Sirtori, 7/9 20129 Milano, Italy
KENWOOD IBERICA S.A.
Bolivia, 239-08020 Barcelona, Spain
KENWOOD ELECTRONICS AUSTRALIA PTY. LTD.
(A.C.N. 001 499 074)
16 Giffnock Avenue, Centrecourt Estate, North Ryde, N.S.W. 2113, Australia
KENWOOD ELECTRONICS (HONG KONG) LTD.
Unit 3712-3724, Level 37, Tower one Metroplaza, 223 Hing Fong Road, Kwai Fong, N.T.,
Hong Kong
KENWOOD ELECTRONICS TECHNOLOGIES(S) PTE LTD.
Sales Marketing Division
1 Ang Mo Kio Street 63, Singapore 569110

TK-8108TK-8108
2
263
目录
INTRODUCTION
SCOPE OF THIS MANUAL
This manual is intended for use by experienced techni-
cians familiar with similar types of commercial grade com-
munications equipment. It contains all required service in-
formation for the equipment and is current as of this publica-
tion date. Changes which may occur after publication are
covered by either Service Bulletins or Manual Revisions,
which are issued as required.
ORDERING REPLACEMENT PARTS
When ordering replacement parts or equipment informa-
tion, the full part identification number should be included.
This applies to all parts : components, kits, and 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 person-
nel safety :
•DONOT transmit if someone is within two feet (0.6
meter) of the antenna.
•DONOT transmit until all RF connectors are secure and
any open connectors are properly terminated.
•SHUT this equipment when near electrical blasting caps
or while in an explosive atmosphere.
•All equipment should be properly grounded before
power-up for safe operation.
•This equipment should be serviced by only qualified tech-
nicians.
概述 ........................................................................... 2
操作特性 .................................................................... 5
模式组合 .................................................................. 11
维修时拆卸部件 ....................................................... 14
电路说明 .................................................................. 15
半导体数据 .............................................................. 24
元件说明 .................................................................. 26
零件表 ..................................................................... 29
部件分解图 ............................................................... 37
包装 .......................................................................... 38
TERMINAL FUNCTION / 端子功能
CN1 (TX-RX Unit)
Pin No. Name Function
1GND Ground
2PTT PTT/TXD
3HOOK Hook detection/RXD
4ME Mic ground
5MIC Mic signal input
6POWER Power switch
7LED MON Signal of MON Key control
8LED PF Signal of PF Key control
9LED C1 Signal of channel1 control
10 LED C2 Signal of channel2 control
11 LED R Signal of TX control
12 LED G Signal of Busy control
13 MICBL Mic backlight control
14 LED C3 Signal of channel3 control
15 LED C4 Signal of channel4 control
16 CM Mic data detection
17 KM11 Key matrix input 11
18 KM12 Key matrix input 22
19 KM13 Key matrix input 33
20 KM14 Key matrix input 44
21 KM01 Key matrix input 01
22 KM02 Key matrix input 02
23 PSB Switched B
J1 (TX-RX Unit)
Pin No. Name Function
1SP Audio signal output to internal/external speaker.
2E Ground
J1 (Display Unit)
Pin No. Name Function
1MBL MIC backlight control.
2PSB 13.6V.
3GND Ground.
4PTT/TXD PTT.
5ME MIC ground.
6MIC MIC signal input.
7HOOK/RXD Hook detection
8CM MIC data detection.
调整 .......................................................................... 39
PC板视图
DISPLAY UNIT (X54-3340-20) ............................ 47
TX-RX UNIT (X57-6303-XX) ............................... 49
原理图 ...................................................................... 55
方块图 ...................................................................... 59
电平图 ...................................................................... 61
端子功能 ................................................................... 63
规格 .......................................................................背面
GENERAL / 概述
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。在出版后可能发生变动，如果需要，可以参照《维修通报》
或《手册修订本》进行补充。
替换零件的订购
当订购替换零件或设备资料时，应注意完整的零件识别号
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∶
•如果有人在天线两英尺（0.6米）范围之内时，不要进行发
射。
•在没有认真核实所有射频插头之前或有任何一个脱开的插头
没有连接到相应端口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，必须关闭电源，不要
操作本设备。
•为了操作的安全，在接通电源之前所有设备应该连接地线。
•本设备只应该由有资格的技术人员进行维修。
CN1 (发射-接收单元)
管脚序号 名称 功能
1GND 接地
2PTT PTT/TXD
3HOOK 接通检测/RXD
4ME 话筒接地
5MIC 话筒信号输入
6POWER 电源开关
7LED MON MON键信号控制
8LED PF PF键信号控制
9LED C1 信道1信号控制
10 LED C2 信道2信号控制
11 LED R TX信号控制
12 LED G 繁忙信号控制
13 MICBL 话筒背景灯光控制
14 LED C3 信道3信号控制
15 LED C4 信道4信号控制
16 CM 话筒数据检测
17 KM11 键矩阵输入 11
18 KM12 键矩阵输入 22
19 KM13 键矩阵输入 33
20 KM14 键矩阵输入 44
21 KM01 键矩阵输入 01
22 KM02 键矩阵输入 02
23 PSB 转换的B
J1 (发射-接收单元)
管脚序号 名称 功能
1SP 音频信号输出到内置/外置扬声器
2E 接地
J1 (显示单元)
管脚序号 名称 功能
1MBL 话筒背景灯光控制
2PSB 13.6V
3GND 接地
4PTT/TXD 通话
5ME 话筒接地
6MIC 话筒信号输入
7HOOK/RXD 接通检测
8CM 话筒数据检测

3
TK-8108
PRE-INSTALLATION CONSIDERNATIONS
1. UNPACKING
Unpack the radio from its shipping container and check
for accessory items. If any item is missing, please contact
KENWOOD immediately.
2. LICENSING REQUIREMENTS
Federal regulations require a station license for each ra-
dio installation (mobile or base) be obtained by the equip-
ment owner. The licensee is responsible for ensuring trans-
mitter power, frequency, and deviation are within the limits
permitted by the station license.
Transmitter adjustments may be performed only by a li-
censed technician holding an FCC first, second or general
class commercial radiotelephone operator’s license. There
is no license required to install or operate the radio.
3. PRE-INSTALLATION CHECKOUT
3-1. Introduction
Each radio is adjusted and tested before shipment. How-
ever, it is recommended that receiver and transmitter opera-
tion be checked for proper operation before installation.
3-2. Testing
The radio should be tested complete with all cabling and
accessories as they will be connected in the final installa-
tion. Transmitter frequency, deviation, and power output
should be checked, as should receiver sensitivity, squelch
operation, and audio output. QT equipment operation
should be verified.
4. PLANNING THE INSTALLATION
4-1. General
Inspect the vehicle and determine how and where the
radio antenna and accessories will be mounted.
Plan cable runs for protection against pinching or crush-
ing wiring, and radio installation to prevent overheating.
4-2. Antenna
The favored location for an antenna is in the center of a
large, flat conductive area, usually at the roof center. The
trunk lid is preferred, bond the trunk lid and vehicle chassis
using ground straps to ensure the lid is at chassis ground.
4-3. Radio
The universal mount bracket allows the radio to be
mounted in a variety of ways. Be sure the mounting surface
is adequate to support the radio’s weight. Allow sufficient
space around the radio for air cooling. Position the radio
close enough to the vehicle operator to permit easy access
to the controls when driving.
4-4. DC Power and wiring
1. This radio may be installed in negative ground electrical
systems only. Reverse polarity will cause the cable fuse
to blow. Check the vehicle ground polarity before installa-
tion to prevent wasted time and effort.
GENERAL / 概述
安装前条件
1. 开箱
从运输包装中取出本无线电设备并检查附件。如果有任何组
件遗失，请立即与 KENWOOD 联系。
2. 所需许可证
联邦法规要求设备所有者必须使每一个安装无线电的地点
（移动站或基站）获得许可证。持有许可证者必须确保发射功
率、频率以及频偏在许可证的有限允许范围之内。
必须只能由经许可的、持有FCC一级、二级或高级商业无线
电话机操作者证书的技术人员进行发射调整。安装或操作本无
线电设备无需许可。
3. 安装前检查
3-1. 说明
在运输之前每一台无线电设备均已调整和测试过。但是，在
安装之前最好检查接收和发射以便操作正确。
3-2. 测试
无线电设备应该按照电缆和附件最终安装时的连接进行完整
的测试。应该检查发射频率、频偏和输出功率，同样应该检查
接收灵敏度、静噪和音频输出。应该检验信令操作。
4. 安装的步骤
4-1. 概述
检查车辆并确认如何以及在何处安装无线电天线和附件。
安排好电缆的位置，避免挤压或碾碎布线，同时无线电设备
避免过热。
4-2. 天线
天线的最佳位置应该在一个宽阔，平整导电区域的中心，通
常在车顶的中心。行李箱的盖子更好，将地线黏结在行李箱的
盖子和车辆的外壳上确保行李箱盖子接地。
4-3. 无线电设备
通用安装托架允许以多种方法安装无线电设备。确认安装的
表面足以支撑无线电设备的重量。无线电设备的周围留出适当
的空间进行散热。将无线电设备尽可能的安装在靠近车辆操作
者的位置上，以便在驾驶时易于控制。
4-4. 直流电源和布线
1. 本无线电设备只能被安装在负极接地电子系统中。反向极性
将导致电缆保险丝熔断。在安装之前检查车辆的接地极性，
避免工作效率低以及浪费时间。

4
TK-8108
speaker jack cap
Power input
connector
Antenna connector
天线连接器
电源输入插座
扬声器插孔盖
NOTE
If you do not intend to use the 3.5-mm jack for the exter-
nal speaker, fit the supplied speaker-jack cap to stop dust
and sand getting in.
2. Connect the positive power lead directly to the vehicle
battery positive terminal. Connecting the Positive lead to
any other positive voltage source in the vehicle is not rec-
ommended.
3. Connect the ground lead directly to the battery negative
terminal.
4. The cable provided with the radio is sufficient to handle
the maximum radio current demand. If the cable must be
extended, be sure the additional wire is sufficient for the
current to be carried and length of the added lead.
5. INSTALLATION PLANNING –CONTROL STATIONS
5-1. Antenna system
Control station. The antenna system selection depends
on many factors and is beyond the scope of this manual.
Your KENWOOD dealer can help you select an antenna sys-
tem that will best serve your particular needs.
5-2. Radio location
Select a convenient location for your control station radio
which is as close as practical to the antenna cable entry
point. Secondly, use your system’s power supply (which
supplies the voltage and current required for your system).
Make sure sufficient air can flow around the radio and
power supply to allow adequate cooling.
SERVICE
This radio is designed for easy servicing. Refer to the
schematic diagrams, printed circuit board views, and align-
ment procedures contained in this manual.
GENERAL / 概述
注意事项
3.5mm 外部扬声器插孔不用时，请用提供的扬声器插孔帽将
其盖上，以防止沙尘进入。
2. 将电源的正极引线直接连接到车载电池的正极端点上。不要
将正极引线与车辆上的其他正极电压连接。
3. 将接地引线直接与电池的负极连接。
4. 与无线电设备一起提供的电缆适用于所需的最大无线电电
流。如果电缆必须加长，要确认附加的电线适用于所载的电
流和添加引线的长度。
5．安装步骤 - 基站
5-1. 天线系统
基站。天线系统的选择取决于许多因素和本手册的范围。用
户的KENWOOD销售商可以帮助用户选择最能满足用户特殊要
求的天线系统。
5-2. 无线电位置
为用户的基站无线电设备选择一个方便的位置，此位置应尽
量靠近天线电缆输入点。其次，使用用户系统的电源（为用户
的系统提供所需的电压和电流）。确认无线电设备周围的空气流
通顺畅并且足以使电源冷却。
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、印刷电路板图和调整步骤在内的资料供参考。

5
TK-8108
1. 控制和功能
1-1. 前面板
操作特性
qwe tr
y
u
i
o
q (电源) 开关
按此键可以接通对讲机的电源。按下并且保持大约1秒钟，
可以切断对讲机的电源。
w▲ 键
按此键可以升高音量。
e▼ 键
按此键可以降低音量。
r● 键
PF (可编程功能) 键。该键的原设置为无 (无功能)。该键可
使用的可编程功能如下所示。
t键
PF (可编程功能) 键。该键的原设置为监听器。该键可使用
的其他可编程功能如下所示。
y1/ 2/ 3/ 4 键
按此键可以从1至4选择频道。使用组功能时，按下后可选
择5至8的频道。
u麦克风插孔
用于插入麦克风插头。
i扬声器
内置扬声器。
oPTT （按下通话）开关
按下此开关，然后向麦克风说话，呼叫电台。
1-3. 可编程辅助功能：
•紧急 •扫描开始 / 停止
•键锁 •直接通话
•监听器 •暂时删除
•无 (无功能) •组
指示灯 说明
发射时点亮。
在当前选择的频道上检测到信号时点
亮。
当编程到对应键的功能开启时点亮。
当编程到对应键的功能开启时点亮。
点亮显示当前选择的频道（1〜4或５〜
８）。
1-4. 显示
1-5. 后面板
外部扬声器插孔
电源输入连接器
天线连接器
1-2. 麦克风

6
TK-8108
2. Operation Features
The TK-8108 is a UHF FM radio designed to operate in
conventional format. The programmable features are sum-
marized.
3. Transceiver Controls and Indicators
3-1. Front Panel Controls
All the keys on the front panel are momentary-type push
buttons. The functions of these keys are explained below.
•POWER key
Transceiver POWER key. When the power is switched
off, all the parameters are stored in memory. When the
power is switched on again, the transceiver returns to the
previous conditions.
•CHANNEL Keys
•MONITOR key (Programmable)
•key (Programmable)
•VOLUME UP/DOWN key
When the key is pressed, the volume level is increased/
decreased and repeats if held for 200ms or longer.
•BUSY/TX LED
The BUSY indicator (Green LED) shows that the channel
is in use. The TX indicator (Red LED) shows that you are
transmitting.
3-2. Programmable Keys
The FPU (KPG-70D) enables programmable keys to se-
lect the following functions.
•Emergency •Talk Around
•Key Lock •Temporary Delete
•Monitor •None
•Scan ON/OFF •Group
•Emergency
Pressing this key for longer than 1 second causes the
transceiver to enter the emergency mode. The transceiver
jumps to the programmed "Emergency channel" and trans-
mits for 25* seconds.
The transceiver disables mic mute while transmitting.
After finishing transmission, the transceiver receivers for 5*
seconds. The transceiver Mute* the speaker while receiv-
ing. Following the above sequence, the transceiver contin-
ues to transmit and receive.
* Default value
•Key lock
Pressing this key causes the transceiver to accept entry
of only the [Vol Up/Down]*, [Key lock], Microphone [PTT],
[Monitor], [Emergency], and [Power] keys.
* Programmable
•Monitor
Used to release signalling (press once) or squelch (press
and hold for approximately two seconds) when operating as
a conventional. It is also used to reset option signalling.
•Scan ON/OFF
Press this key starts scanning. Pressing this key stops
scanning.
OPERATING FEATURES / 操作特性
2. 操作特性
TK-8108是一种被设计为在常规格式下进行操作的UHF FM
无线电设备。可编程特性摘要如下。
3. 车载台控制和指示灯
3-1. 前面板控制
前端面板的所有按键均为短瞬型按键。这些按键的功能介
绍如下。
•电源键
车载台电源按键。当关闭电源时，所有的参数，均被储存
在存储器中。当电源再次开启时，车载台回到先前的状态。
•信道键
•监听键 (可编程)
•键 (可编程)
•音量高/低键
按该键可以增大或减小音量，按下该键并保持200ms以上可
连续调节音量。
•繁忙/发射指示灯
繁忙指示灯（绿色）表示信道正在使用中。发射指示灯
（红色）表示用户正在进行发射。
3-2. 可编程按键
FPU（KPG-70D）可以使可编程按键选择下述功能。
•紧急报警 •脱网
•按键锁定 •临时删除
•监听器 •无
•扫描 ON/OFF •组
•紧急报警
按住此键1秒钟以上将使车载台进入紧急报警模式。车载台
将跳到已编程的“紧急报警组和信道”并且发射25*秒钟。
在发射过程中车载台不能保持话筒静音。发送结束后，车
载台接收5*秒钟。接收时车台机保持扬声器静音*。按照上述
顺序，车载台将连续发射和接收。
*初始值
•按键锁定
按此键使车载台只接收[音量高/低]*，[按键锁定]，话筒[通
话]，[监听器]，[紧急报警]和[电源]按键的输入。
*可编程
•监听器
当以常规方式操作时用于释放信令 (按一次) 或静噪抑制 (按
下并保持约两秒钟)。也用于复位可选信令。
•扫描 ON/OFF
按此键开始扫描。再按此键停止扫描。

7
TK-8108
•Talk around
Press this key, the transceiver uses the receive fre-
quency and the tone for transmission.
The operator can call the other party directly (without re-
peater). Press this key again, the talk around function goes off.
•Temporary delete
The "Add" channel contained in the scan sequence, and
"Delete" channel is not contained. In the scan mode, this
key switches the channel delete temporarily (Press and hold
for approximately one second).
When the transceiver is turned off, the transceiver exits
the scan or switches the scan function off.
•None
Sounds error operation beep, and no action will occur.
Use this function when the transceiver is required to be
more simple operated.
•Group
If Group has been programmed onto a key, press the
Group key to select the second group of channels. While
active, the LED beside the key lights. At this time, press a
key from 1 to 4 to select a channel from 5 to 8. To return to
channels 1 through 4, press the Group key again.
Note: You cannot use the Group function while operating
in Emergency mode.
4. Scan Operating
■SCAN start condition
Two or more channels must be added to all channels that
can be scanned. The transceiver must be in normal receive
mode (PTT off).
When you activate the key programmed to the scan ON/
OFF function, the scan starts. The indicator next to the pro-
grammed key LED blinks.
■Scan stop condition
The scan stops temporarily if the following conditions are
satisfied.
1) A carrier is detected, then QT/DQT matches on channels
for which receive the QT/DQT is set by the programming
software.
2) A carrier is detected on the channels for which receiving
QT/DQT is not set by the programming software or when
the monitor (signalling cancel) function is activated.
■Revert channel
The revert channel is used to transmit during scanning
and set by the programming software (KPG-70D).
1) Selected channel
The transceiver reverts to the channel before scanning or
the channel that you changed during scan.
2) Selected with talkback
The transceiver reverts to the selected channel prior to
scan initiation.
However, if a call is received on a channel other then the
selected channel and PTT is pressed before scanning re-
sume, the transceiver "talks back" on the current receive
channel.
■Scan end
When you press the key programmed to the scan func-
tion during scan mode, the scan ends.
The indicator next to the programmed key LED turns off.
OPERATING FEATURES / 操作特性
•脱网
按该键，车载台将使用脱网频率。
使用者可直接呼叫对方（不需要转发器）。再次按该键将关
闭脱网功能。
•临时删除
“添加”信道包含在扫描序列中，而“消除”信道不包含在
扫描序列中。在扫描模式下，该键为信道暂时消除开关 (按下
并保持约 1 秒钟)。
当车载台关闭时，它将退出扫描或关闭扫描功能。
•无
错误操作beep音响起，并且无任何变化。当车载台需要更简
单操作时使用此功能。
•组
如果组功能已经编程到某一键，按下组键选择频道的第二
组。本功能开启后，该键旁的 LED 指示灯点亮。这时，按下
1 至 4 中的键，从 5 至 8 中选择频道。需要返回到频道 1 至 4
时，再次按下组键。
注释∶在紧急模式下操作时，无法使用组功能。
4. 扫描操作
■扫描开始条件
可扫描信道中必须至少添加两个以上的信道。车载台必须处
于一般接收模式 (PTT 关闭)。
当启动扫描ON/OFF功能键时开始扫描，该键旁边的指示灯
会闪烁。
■扫描开始条件
如果下述条件具备，则扫描临时停止。
1) 检测到载波，QT/DQT 与编程软件设定的接收 QT/DQT 的
信道上相匹配。
2) 在没有由编程软件设定为接收 QT/DQT 的信道上检测到载
波时，或者在启动了监听（信令取消）功能时。
■回复信道
回复信道用于在扫描过程中发射，并且通过编程软件(KPG-
70D)设定。
1) 选择信道
车台机回复到扫描之前的信道或用户在扫描过程中改变的信
道。
2) 选择带有回应的信道
在扫描开始之前，车载台回到所选信道上。
但是，在所选信道之外的信道上收到呼叫并且在继续扫描前
按下了 PTT 键时，车载台将在当前接收信道上“回话”。
■扫描结束
在扫描模式中按扫描功能键时，扫描停止。
该键旁边的指示灯关闭。

8
TK-8108
■Temporary delete
It is possible to delete channel temporary during scan.
When scan stops on unnecessary channel for example by
interference of the other party, activate the delete function
(for example press and hold the key for approximately one
second), then that channel is deleted temporarily and scan
re-start immediately.
The temporary deleted channels return to pre-set delete/
add channels, when the transceiver is turned off or the scan
function is switched off.
5. Details of Features
■Time-out timer
The time-out timer can be programmed in 30 seconds
increments from 30 seconds to five minutes and off. If the
transmitter is transmitted continuously for longer than the
programmed time, the transmitter is disabled and a warning
tone sounds while the PTT button is held down. The warn-
ing tone stops when the PTT button is released.
■PTT ID
PTT ID provides a DTMF ANI to be sent with every time
PTT (beginning of transmission, end of transmission, or
both).
You can program PTT ID "on" or "off" for each channel.
The contents of ID are programmed each Radio.
The timing that the transceiver sends ID is program-
mable.
BOT : DTMF ID (Beginning of TX) is sent on beginning of
transmission.
EOT : DTMF ID (End of TX) is sent on end of transmis-
sion.
Both : DTMF ID (Beginning of TX) is sent on beginning of
transmission and DTMF ID (End of TX) is sent on end of
transmission.
■Off hook decode
If the Off hook decode function has been enabled, re-
moving and replacing the microphone on the hook has no
effect for decoding QT/DQT and option signalling.
■"TOT" pre-alert
The transceiver has "TOT" pre-alert timer. This parameter
selects the time at which the transceiver generates "TOT"
pre-alert tone before "TOT" is expired.
"TOT" will be expired when the selected time passes
from a TOT pre-alert tone.
■"TOT" re-key time
The transceiver has "TOT" re-key timer. This timer is the
time you can not transmit after "TOT" exceeded. After "TOT"
re-key time expired you can transmit again.
■"TOT" reset time
The transceiver has "TOT" reset timer. This timer is the
minimum wait time allowed during a transmission that will
reset the "TOT" count.
"TOT" reset time causes the "TOT" to continue even after
PTT is released unless the "TOT" reset timer has expired.
OPERATING FEATURES / 操作特性
■临时删除
可以在扫描进行中暂时消除信道。如果扫描停在不需要的信
道 (例如对方的干扰) 上，则可启动消除键 (例如按该键并保持
约 1 秒钟)，该信道将被暂时消除并立即重新启动扫描。
当收发机关闭或扫描功能关闭时，暂时删除的信道将返回到
预设的消除/添加信道中。
5. 详细功能
■超时计时器
可以以 30 秒为增量设置超时计时器，可设置范围为 30 秒
到 5 分钟或关闭。当发射器连续发射时间超过了预设时间时，
发射器将被禁用并且在按住 PTT 键时鸣响警告音。放开 PTT 键
后警告音停止。
■PTT ID码
伴随每一次PTT (发射开始，发射结束，或两者兼有)，PTT
ID码提供一个被发送的DTMF ANI。
可以将各信道 PTT ID 设为“开”或“关”。分别编制各收
发机的 ID 内容。
车载机发送ID码的时间是可编制的。
BOT∶在发射开始时发送DTMF ID码 (发射开始)。
EOT∶在发射结束时发送DTMF ID码 (发射结束)。
两者兼有∶在发射开始时发送DTMF ID码 (发射开始)。 在
发射结束时发送DTMF ID码 (发射结束)。
■挂断解码
如果挂断解码功能生效，则接通时消除和更换话筒对于QT/
DQT解码和可选信令无效。
■"TOT" 预先告警
车载台具有一个“TOT”预先告警计时器。在“TOT”终止
之前，此参数设定在手持机产生“TOT”预先告警音时的时
间。
当TOT预先告警音发出开始时“TOT”将终止。
■“TOT”再按键时间
车载台具有一个“TOT”再按键定时器。在“TOT”时间超
出之前，此定时器是用户不能发射的时间。在“TOT”再按键
时间终止后，用户可以再发射。
■“TOT”复位时间
车载台具有一个“TOT”复位计时器。在复位“TOT”计数
的发射过程中，此计时器是最小允许等待时间。
除非“TOT”复位计时器终止，否则即使松开PTT键之后，
“TOT”复位时间也使“TOT”继续进行。

9
TK-8108
■Clear to transpond
The transceiver waits the transpond of DTMF if channel
is busy until channel open. This feature prevents the inter-
ference to other party.
6. Option Signalling (DTMF)
Built-in DTMF decoder is available for option signalling.
It is possible to use individual call, group call, Stun.
If the option signalling matches, a predetermined action
will occur.
If option signalling matches on a channel is set up with
option signalling, the channel LED will flash and option sig-
nalling will be released. The transpond or alert tone will
sound.
While option signalling matches (or if option signalling is
deactivated when you are transmitting), you can mute or
unmute QT/DQT/Carrier.
■SP Unmute
You can select the type of SP Unmute system for each
channel. The selection is as follows.
Carrier, QT/DQT:
Channel with this option will not check ID Code in order
to open its speaker.
Carrier+DTMF, QT/DQT+DTMF:
Channel that is set with this option will have to check for
ID Code in order to open its speaker.
Default:
Carrier, QT/DQT.
SP Unmute Channel Setting RX Condition Speaker
QT/DQT DTMF Condition
None Carrier Sounds
Carrier None Yes Carrier Sounds
Carrier+DTMF Sounds
Carrier+DTMF None Yes Carrier Not Sounds
Carrier+DTMF Sounds
None Carrier Not Sounds
Carrier+QT/DQT Sounds
QT/DQT Yes Carrier Not Sounds
Yes
Carrier+QT/DQT Sounds
Carrier+QT/DQT+DTMF Sounds
Carrier+DTMF Not Sounds
Carrier Not Sounds
QT/DQT+DTMF Yes Yes
Carrier+QT/DQT Not Sounds
Carrier+QT/DQT+DTMF Sounds
Carrier+DTMF Not Sounds
Note:
When QT/DQT is not used, QT/DQT and QT/DQT+DTMF
can not be selected.
When DTMF is not used, Carrier+DTMF and QT/
DQT+DTMF can not be selected.
■Auto Reset
If option signalling matches a group set up with option
signalling, option signalling is released. After matching op-
tion signalling, option signalling will temporarily reset auto-
matically.
OPERATING FEATURES / 操作特性
■加强自动应答
如果信道直到打开均繁忙，车载台将等待DTMF应答。此特
性防止干扰到对方。
6. 可选信令 (DTMF)
内置DTMF解码器对可选信令有效。
使用单呼，组呼，遥毙。
如果可选信令相匹配，则触发预定的操作。
如果可选信令在使用可选信令设置的信道上相匹备，信道指
示灯将闪烁并且可选信令将被取消。应答或告警将发出声音。
当可选信令相匹配时（或如果当用户发射时可选信令被抑制
时），用户可以使QT/DQT载波静音或非静音。
■扬声器监听
可以为各信道选择如下扬声器监听系统类型。
载波，QT/DQT：
设定为该选项的信道打开其扬声器时将不检查 ID 代码。
载波+DTMF, QT/DQT+DTMF：
设定为该选项的信道打开其扬声器时必须检查 ID 代码。
初始值：
载波, QT/DQT。
扬声器监听 信道设置 RX 条件 扬声器状态
QT/DQT DTMF
无载波 噪音
载波 无 是载波 噪音
载波+DTMF 噪音
载波+DTMF 无是
载波 无噪音
载波+DTMF 噪音
无载波 无噪音
载波+QT/DQT 噪音
QT/DQT 是 载波 无噪音
是载波+QT/DQT 噪音
载波+QT/DQT+DTMF 噪音
载波+DTMF 无噪音
载波 无噪音
QT/DQT+DTMF 是是
载波+QT/DQT 无噪音
载波+QT/DQT+DTMF 噪音
载波+DTMF 无噪音
注释:
不使用 QT/DQT 时，不能选定 QT/DQT 及 QT/DQT+DTMF。
不使用DTMF时，不能选定载波+DTMF及 QT/DQT+DTMF。
■自动复位
如果可选信令与使用可选信令设置的组相匹配，可选信令被
取消。可选信令匹配之后，可选信令将临时自动复位。

10
TK-8108
■Stun
If the stun code matches, a predetermined action will oc-
cur. Whether option signalling is activated or not, when
stun matches on any channel, the transceiver will become
TX inhibited or TX/RX inhibited. While stun is active, if the
stun code + "#" code is received, stun will deactivate.
When stun matches, transpond will function. Alert will
not be output.
7. Audible User Feedback Tones
The transceiver outputs various combinations of tones to
notify the user of the transceiver operating state.
Refer to the help file on the KPG-70D, regarding the func-
tions that are not listed below.
■Stun on tone
When a stun code is received, transpond tone sounds.
■Stun off tone
When a stun release code is received, transpond tone
sounds.
■Group call tone
Sounds when a group call with the correct DTMF option
signalling is received, repeats 7 times. You can select yes or
no in the Alert tone level setting.
■Individual call tone
Sounds when an individual call with the correct DTMF
option signalling is received. You can select yes or no in the
Alert tone level setting.
■Key input error tone
Sounds when a key is pressed but that key cannot be
used. You can select yes or no for the optional feature's
warning tone.
■Transpond tone
Sounds when an individual call with the correct DTMF
option signalling is received. For group calls, only the group
tone will sound, not the transpond tone.
■Pre alert tone
Sounds prior to the TOT TX inhibit activation. If TOT pre
alert is set, the tone sounds at the amount of time pro-
grammed, before the TOT expires (TOT time –TOT pre alert
time = Pre alert tone sounding time). You can select yes or
no for the optional feature's warning tone.
■Transmit protection
The power module is protected against heat while trans-
mitting by making the radio cuts down TX power when the
temperature of the power module becomes higher than ref-
erence. After that, if the temperature continue to rise, trans-
mission is stopped. The power module is also protected
against over voltage by having the radio to check that the
voltage of power supply connected to the radio is not higher
than about 17V when the radio is turned on, otherwise it can
not transmit. In both cases when transmission is stopped, a
beep will continue to sound until the PTT key is released.
OPERATING FEATURES / 操作特性
■遥毙
遥毙代码匹配时将执行预定操作。当遥毙在任何信道匹配
时，无论可选信令启用与否，车台机都将进入发射禁止或发射/
接收禁止。当遥毙启用时，收到遥毙代码+“#”代码时将禁用
遥毙。
当遥毙匹配时应答功能有效。将不输出告警。
7. 用户反馈提示音
车载台发出各种提示音以提示用户车载台的操作状态。
有关以下没有列出的功能，请参考 KPG-70D 上的帮助文
件。
■遥毙开启提示音
当收到了遥毙代码时鸣响应答音。
■遥毙关闭提示音
当收到了遥毙取消代码时鸣响应答音。
■组呼提示音
当接收到带有正确的DTMF可选信令的组呼叫时发出提示
音，并重复7次。在告警音电平设定中可以选择是或否。
■单呼提示音
当接收到带有正确的DTMF可选信令的单呼时发出提示音。
在告警音电平设定中可以选择是或否。
■按键输入错误提示音
当按下一个按键但不能使用此按键时发出提示音。用户可以
选择要或不要此可选特性的警告提示音。
■应答提示音
当接收到带有正确的DTMF可选信令的单呼时发出提示音。
关于组呼，只发出组提示音，不发出应答提示音。
■预先告警提示音
向TOT发射禁止发出优先提示音。如果设定了TOT预先告
警，在TOT终止之前，在编制的时间发出提示音 (TOT时间-
TOT预先告警时间＝发出预先告警提示音的时间)。用户可以选
择要或不要此可选特性的警告提示音。
■发射保护
功率模块在发射时具有防热保护。当功率模块的温度高于参
考值时，通信机将切断TX电源。此后，如果温度不断上升，发
射就会停止。功率模块也具有过电压保护。当电源打开时，通
信机将检测与收音机连接的供电压是否不超过17伏电压，否则
的话，功率模块将无法发射。在这两种情况下，当发射停止
时，将会有持续的嘟嘟声直到PTT键被断开为止。

11
TK-8108
1. Modes
User mode
PC mode Data program-
ming mode
PC test mode PC tuning mode
Clone mode
Mode Function
User mode For normal use.
PC mode Used for communication between the
radio and PC (IBM compatible).
Data programming Used to read and write frequency data
mode and other features to and from the radio.
PC test mode Used to check the radio using the PC.
This feature is included in the FPU.
PC tuning mode Used to tune the radio using the PC.
Clone mode Used to transfer programming data from
one radio to another.
2. How to Enter Each Mode
Mode Operation
User mode Power ON
PC mode Received commands from PC
Clone mode [1]+Power ON (Two seconds)
3. PC Mode
3-1. Preface
The TK-8108 transceiver is programmed using a personal
computer, a programming interface (KPG-46) and program-
ming software (KPG-70D).
The programming software can be used with an IBM PC
or compatible. Figure 1 shows the setup of an IBM PC for
programming.
3-2. Connection Procedure
1. Connect the TK-8108 to the personal computer with the
interface cable.
2. When the Power is switched on, user mode can be en-
tered immediately. When the PC sends a command, the
radio enters PC mode.
When data is transmitted from transceiver, the red LED
blink.
When data is received by the transceiver, the green LED
blink.
In the PC mode, 4CH LEDs, [MON] LED and [ ] LED are
turned on.
Notes :
•The data stored in the personal computer must match
model type when it is written into the EEPROM.
•Attach the interface cable, then change the TK-8108 to
PC mode.
REALIGNMENT / 模式组合
1. 模式
用户模式
计算机模式 数据编程模式
计算机测试模式 计算机调谐模式
复制模式
模式 功能
用户模式 一般使用。
计算机模式 用于车载台与计算机 (IBM 兼容机)之间的
通信。
数据编程模式 用于阅读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。
计算机调谐模式 用来利用计算机调谐通信机。
复制模式 用于从一个车载台编程数据复制到另一个
车载台。
2. 如何进入每一种模式
模式 操作
用户模式 接通电源
计算机模式 从计算机接收指令
复制模式 [1]+通电 (2秒钟)
3. 计算机模式
3-1. 前言
TK-8108车台机使用计算机，编程电缆 (KPG-46) 和编程软件
(KPG-70D) 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。
3-2. 连接步骤
1. 使用编程电缆将TK-8108与计算机连接。
2. 当接通电源时，可以立即进入用户模式。当计算机发出一个
指令时，车载台进入计算机编程模式。
从车载台发射数据时，红色指示灯闪烁。
当通过车载台接收数据时，绿色指示灯闪烁。
在计算机模式下，4个信道指示灯、[MON] 指示灯及 [ ] 指
示灯亮。
注释 :
•存储在计算机中的数据必须与写入 EEPROM 的格式相匹
配。
•连接编程电缆，然后将TK-8108改变为计算机编程模式。

12
TK-8108
REALIGNMENT / 模式组合
3-4. Programming Software Description
The KPG-70D programming disk is supplied in 3-1/2" disk
format. The software on this disk allows a user to program
TK-8108 radio via a programming interface cable (KPG-46).
3-5. Programming With IBM PC
If data is transferred to the transceiver from an IBM PC
with the KPG-70D, the destination data (basic radio informa-
tion) for each set can be modified.
4. Clone Mode
Programming data can be transferred from one radio to
another by connecting them via their modular microphone
jacks. The operation is as follows (the transmit radio is the
master and the receive radio is the slave).
NOTE: Clone mode should enabled.
1. Turn the master TK-8108 power ON with the [1] key held
down. The TK-8108 [ ] LED is turned on.
2. Power on the slave TK-8108.
3. Connect the cloning cable (No. E30-3382-05) to the
modular microphone jacks on the master and slave.
4. Press the [ ] key on the master TK-8108 transceiver. The
data of the master is sent to the slave. While the master
is sending data, [TX] LED blinked. While the slave is re-
ceiving the data, 4 LEDs, [MON] LED, [ ] LED are turned
on and [BUSY] LED blinked. When cloning of data is
completed, the master [TX] LED turned off, and the slave
automatically operates in the User mode. The slave can
then be operated by the same program as the master.
5. The other slave can be continuously cloned. Carry out
the operation in step 2 to 4.
3-3. KPG-46 Description
(PC programming interface cable : Option)
The KPG-46 is required to interface the TK-8108 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-46 connects the modular microphone jack of
the TK-8108 to the computers RS-232C serial port.
KPG-46
IBM-PC
KPG-70D
TK-8108
Fig. 1 / 图1
3-4. 编程软件说明
KPG-70D编程软盘是一张3-1/2" 软盘。软盘内的软件允许用
户经由编程电缆 (KPG-46) 对TK-8108进行编程设定。
3-5. 使用IBM计算机编程
如果从使用KPG-70D磁盘的IBM计算机将数据发送到车载
台，设定的目的数据 (通信机的基本参数)均可被修改。
4. 复制模式
可以利用标准话筒插孔连接从一台通信机向另一台通信机传
送编程数据。按照下述步骤操作 (发射方车载台为主机，接收
方车载台为子机).
注释: 启用复制模式。
1. 按住[1]键打开主 TK-8108的电源，TK-8108的[ ]指示灯亮。
2. 开启子机TK-8108的电源.
3. 将数据复制电缆(No. E30-3382-05)连接到主机及从属机的标
准话筒插孔。
4. 按主TK-8108通信机的[ ]键。主机的数据将发送到从属机。
主机发送数据时[TX]指示灯闪烁。从属机接收数据时 4 个指
示灯、[MON]指示灯及[ ]指示灯亮，[BUSY]指示灯闪烁。
数据复制完成后，主机的[TX]指示灯关闭，从属机自动运行
于用户模式。之后，从属机即可由与主机相同的程序操作。
5. 另一台子机可以继续复制。进行步骤2到4的操作。
3-3. KPG-46说明
(计算机编程电缆：可选件)
KPG-46用于将TK-8108与计算机连接。在其D型副插座 (25
芯)中有一个电平转换电路，此电路可以把RS-232C逻辑电平转
换为TTL电平。
KPG-46将TK-8108的话筒插座与计算机的RS-232C串行口连
接。

13
TK-8108
Adding the data password.
If the data password is set in the optional feature menu,
you must enter the password (Master transceiver) to acti-
vate a clone mode.
you can use 1, 2, 3, and 4 to configure the password. The
maximum length of the password is 10 digits.
1. [1]+Power ON.
2. [1]~[4] LED, and MON LED are turned ON.
3. Enter the password using [1]~[4] keys.
4. Press [MON] key.
5. If the password matches, the transceiver enters a clone
mode. Otherwise, transceiver beeps and returns to the
password input mode.
Cloning cable / 复制电缆
(E30-3382-05)
Fig. 2 / 图2
REALIGNMENT / 模式组合
添加数据密码。
如果在特性选择菜单中设定了密码，则在启动复制模式时必
须输入该密码（主机）。
密码可以使用数字1、2、3、4，密码的最大长度为 10 个数字。
1. [1]+电源接通。
2. [1]~[4]指示灯、MON 指示灯亮。
3. 使用键[1]~[4]输入密码。
4. 按[MON]键。
5. 如果密码相符，车载台将进入复制模式，否则，车载台将发
出蜂鸣音并回到密码输入模式。

14
TK-8108
1. When you remove the panel, turn the transceiver up
side down. Detach the panel by lifting the tabs as
shown below.
Fig. 1 / 图1
Fig. 2 / 图2
DISASSEMBLY FOR REPAIR / 维修时拆卸部件
2. To remove the cabinet, first turn the transceiver up
side down. Detach the cabinet by prying the tabs as
shown below.
3. To remove the display unit PCB, detach the PCB by
lifting at the indents of the PCB as shown below.
Fig. 3 / 图3
Fig. 4 / 图4
4. When mounting the front panel, match the 4 tabs of
the chassis with the panel, being sure they attach
securely.
tabs / 翼片
tabs / 翼片
tabs / 翼片
indents / 榫接部
tabs / 翼片
tabs / 翼片
1. 要卸下面板时，请翻转通信机，按下图所示抬起翼片
卸除面板。
3. 要卸下显示单元电路板时，请按下图所示抬起电路板
的榫接部卸除电路板。
2. 要卸下机箱时，请先翻转通信机，按下图所示撬起翼
片卸除机箱。
4. 安装前面板时，应将底架的 4 个翼片与面板接合，并
确保其结合紧密。

15
TK-8108
Frequency Configuration
The receiver utilizes double conversion. The first IF is
49.95MHz and the second IF is 450kHz. The first local oscil-
lator signal is supplied from the PLL circuit.
The PLL circuit in the transmitter generates the neces-
sary frequencies. Figure 1 shows the frequencies.
Fig. 1Frequency configuration / 图1 频率构成
Receiver System
The receiver is double conversion superheterodyne. The
frequency configuration is shown in Figure 1.
■Front-end RF Amplifier
An incoming signal from the antenna is applied to an RF
amplifier (Q26) after passing through a transmit/receive
switch circuit (D31 and D32 are off) and a BPF (L36, L38,
L48, L49 and varactor diodes: D25, D26, D28). After the
signal is amplified (Q26), the signal is filtered by a BPF (L30,
L32 and varactor diodes: D21, D22) to eliminate unwanted
signals before it is passed to the first mixer.
The voltage of these diodes are controlled by tracking the
CPU (IC6) center frequency of the band pass filter. (See Fig. 2)
■First Mixer
The signal from the RF amplifier is heterodyned with the
first local oscillator signal from the PLL frequency synthe-
sizer circuit at the first mixer (Q21) to create a 49.95MHz
first intermediate frequency (1st IF) signal. The first IF signal
is then fed through two monolithic crystal filters (MCFs :
XF1) to further remove spurious signals.
Fig. 2 Receiver system / 图2 接收部系统
CIRCUIT DESCRIPTION / 电路说明
ANT
SW
RF
AMP
1st
MIX
AF
PA
TCXO
MIC
AMP
X3
multiply
RF
AMP
POWER
AMP
CF 450kHz
MCF
49.95MHz
IF SYSTEM
PLL/VCO
16.8MHz
50.4MHz
ANT
RX
TX
SP
MIC
SW
ANT
L36,38,48,49
D25,26,28
BPF
Q26
RF AMP
Q19
IF AMP
IC3
D/A CONVERTER
Q21
MIX
XF1
MCF
D30,31,32
ANT
SW
IC3
D/A
Q6
X3 multiply
X1
TCXO
IC5
IF system
1st local
OSC (VCO/PLL)
DEO
CF1 (Wide)
CF2 (Narrow)
TV
CPU
L30,32
D21,22
BPF
频率构成
接收部采用二次变频超外差方式。第一中频为49.95MHz，
第二中频为450kHz。第一本振频率信号由锁相环电路提供。
发射部由锁相环电路直接产生所需要的频率。图1显示各种
频率。
接收部系统
接收部为二次变频超外差方式。频率构成如图 1 所示。
■前级射频放大器
从天线进入的信号经过收发转换电路 (D31和D32断开) 和带
通滤波器 (L36, L38, L48, L49 和变容二极管: D25, D26, D28) 进
入射频放大器 (Q26)。信号被放大 (Q26) 之后，信号被带通滤
波器 (L30, L32 和变容二极管: D21, D22) 滤波，在进入第一混
频器之前消除不需要的信号。
通过跟踪带通滤波器的CPU (IC6) 中心频率来控制这些二极
管的电压。(参见图 2)
■第一混频器
来自于射频放大器的信号与来自于第一混频器 (Q21) 的锁相
环频率合成器电路的第一本振信号混合后产生49.95MHz的第一
中频 (1st IF) 信号。然后，第一中频信号进入两个单片晶体滤波
器 (MCFs∶XF1) 进一步消除寄生信号。

16
TK-8108
■中频放大器
第一中频信号通过 Q19 被放大，然后进入 IC5 (调频处理芯
片)。信号再次与IC5中的第二本振信号混合后产生450kHz的第
二中频信号。第二中频信号在被放大之前进入450kHz的陶瓷滤
波器 (宽∶CF1，窄∶CF2) 进一步消除不需要的信号并且在 IC5
中调频检测。
项 目 额 定 值
额定中心频率 49.95MHz
通频带宽 在3dB时± 5.0kHz 或更大
35dB停止带宽 ± 20.0kHz 或更小
脉动 1.0dB 或更低
插入损耗 5.0dB 或更低
保证衰减 在fo±1MHz时80dB 或更大
寄生信号 : 在fo±1MHz之内40dB 或更大
端点阻抗 350 / 5.5pF
表1 晶体滤波器 (L71-0591-05) : XF1
项 目 额 定 值
额定中心频率 450kHz
6dB带宽 ± 6.0kHz 或更大
50dB带宽 ± 12.5kHz 或更小
脉动 2.0dB 或更低
插入损耗 6.0dB 或更低
保证衰减 在fo±100KHz之内35.0dB 或更大
端点阻抗 2.0k
表2 陶瓷滤波器 (L72-0993-05) : CF1
项 目 额 定 值
额定中心频率 450kHz
6dB带宽 ± 4.5kHz 或更大
50dB带宽 ± 10.0kHz 或更小
脉动 2.0dB 或更低
插入损耗 6.0dB 或更低
保证衰减 在fo±100KHz之内60.0dB 或更大
端点阻抗 2.0k
表3 陶瓷滤波器 (L72-0999-05) : CF2
CIRCUIT DESCRIPTION / 电路说明
■IF Amplifier
The first IF signal is amplified by Q19, and the enters IC5
(FM processing IC). The signal is heterodyned again with a
second local oscillator signal within IC5 to create a 450kHz
second IF signal. The second IF signal is then fed through a
450kHz ceramic filter (Wide : CF1, Narrow : CF2) to further
eliminate unwanted signals before it is amplified and FM de-
tected in IC5.
Item Rating
Nominal center frequency 49.95MHz
Pass bandwidth ±5.0kHz or more at 3dB
35dB stop bandwidth ±20.0kHz or less
Ripple 1.0dB or less
Insertion loss 5.0dB or less
Guaranteed attenuation 80dB or more at fo±1MHz
Spurious : 40dB or more within fo±1MHz
Terminal impedance 350 / 5.5pF
Table 1 Crystal filter (L71-0591-05) : XF1
Item Rating
Nominal center frequency 450kHz
6dB bandwidth ±6.0kHz or more
50dB bandwidth ±12.5kHz or less
Ripple 2.0dB or less
Insertion loss 6.0dB or less
Guaranteed attenuation 35.0dB or more within fo±100kHz
Terminal impedance 2.0k
Table 2 Ceramic filter (L72-0993-05) : CF1
Item Rating
Nominal center frequency 450kHz
6dB bandwidth ±4.5kHz or more
50dB bandwidth ±10.0kHz or less
Ripple 2.0dB or less
Insertion loss 6.0dB or less
Guaranteed attenuation 60.0dB or more within fo±100kHz
Terminal impedance 2.0k
Table 3 Ceramic filter (L72-0999-05) : CF2

17
TK-8108
■Wide/Narrow Changeover Circuit
The Wide port (pin 92) and Narrow port (pin 91) of the
CPU is used to switch between ceramic filters. When the
Wide port is high, the ceramic filter SW diodes (D13, D15)
cause CF1 to turn on to receive a Wide signal.
When the Narrow port is high, the ceramic filter SW diodes
(D13, D15) cause CF2 to turn on to receive a Narrow signal.
■AF Signal System
The detection signal from IF IC (IC5) goes to D/A con-
verter (IC3) to adjust the gain and is output to AF filter (IC10)
for characterizing the signal. The AF signal output from IC10
and the DTMF signal, BEEP signal are summed and the re-
sulting signal goes to the D/A converter (IC3). The AFO out-
put level is adjusted by the D/A converter. The signal output
from the D/A converter is input to the audio power amplifier
(IC102). The AF signal from IC102 switches between the
internal speaker and speaker jack (J1) output.
FIg. 4 AF signal system / 图4 音频信号系统
CIRCUIT DESCRIPTION / 电路说明
Fig. 3 Wide/Narrow changeover circuit /
图3 宽／窄转换电路
Narrow
IC6 91pin
IF_IN MIX_O
IC5
IF System
CF2
(Narrow)
CF1
(Wide)
R74 R78
R77
R73
D13 D15
Wide
IC6 92pin
D/A
CONV.
AF
Filter
D/A
CONV.
IC3 IC10 IC3
DEO AF PA
IC102 SP
IF IC
IC5
■宽／窄转换电路
CPU的宽端口 (管脚 92) 和窄端口 (管脚 91) 用于陶瓷滤波器
之间的切换。当宽端口为高电平时, 陶瓷滤波器 SW 二极管
(D13, D15) 使 CF1 导通来接收宽带信号。
当窄端口为高电平时, 陶瓷滤波器 SW 二极管 (D13, D15) 使
CF2 导通来接收窄带信号。
■音频信号系统
来自于IF IC (IC5) 的检测信号进入数/模转换器 (IC3) ，调整
增益并输出到AF滤波器 (IC10) 来表示信号的特征。从IC10输出
的AF信号，DTMF 信号和BEEP 信号被累加，并且将获得的信
号送到数/模转换器(IC3). AFO 输出电平被数/模转换器调整。从
数/模转换器输出的信号被输入到音频功率放大器 (IC102). 来
自于IC102的AF信号在内部扬声器和扬声器插口 (J1) 输出之间
变换。

18
TK-8108
■Squelch Circuit
The detection output from the FM IF IC (IC5) passes
through a noise amplifier (Q18) to detect noise. A voltage is
applied to the CPU (IC6). The CPU controls squelch accord-
ing to the voltage (SQIN) level. The signal from the RSSI pin
of IC5 is monitored. The electric field strength of the re-
ceive signal can be known before the SQIN voltage is input
to the CPU, and the scan stop speed is improved.
Fig. 5 Squelch circuit / 图5 静噪电路
Q18
NOISE AMP
D18IC5 IC6
AF
RSSI
DET
CPU
IF
SYSTEM
SQIN
RSSI
PLL Frequency Synthesizer
The PLL circuit generates the first local oscillator signal
for reception and the RF signal for transmission.
■PLL
The frequency step of the PLL circuit is 5 or 6.25kHz. A
16.8MHz reference oscillator signal is divided at IC1 by a
fixed counter to produce the 5 or 6.25kHz reference fre-
quency. The voltage controlled oscillator (VCO) output sig-
nal is buffer amplified by Q15, then divided in IC1 by a dual-
module programmable counter. The divided signal is com-
pared in phase with the 5 or 6.25kHz reference signal in the
phase comparator in IC1. The output signal from the phase
comparator is filtered through a low-pass filter and passed
to the VCO to control the oscillator frequency. (See Fig. 6)
■VCO
The operating frequency is generated by Q11 in transmit
mode and Q10 in receive mode. The oscillator frequency is
controlled by applying the VCO control voltage, obtained
from the phase comparator, to the varactor diodes (D10 and
D12 in transmit mode and D9 and D11 in receive mode).
The TX/RX pin is set low in receive mode causing Q12 and
Q7 to turn Q11 off, and turn Q10 on. The TX/RX pin is set
high in transmit mode. The outputs from Q10 and Q11 are
amplified by Q15 and sent to the RF amplifiers.
■静噪电路
从调频中频芯片(IC5)输出的检测经过噪音放大器 (Q18)检测
噪音。向CPU (IC6)输入电压。CPU按照电压(SQIN)电平控制静
噪。来自于IC5的RSSI管脚的信号被监听。在SQIN电压被输入
到CPU之前可以识别接收信号的电场强度，并且扫描停止速度
将增快。
锁相环频率合成器
锁相环电路产生接收机的第一本振信号和用于发射的射频载
波信号。
■锁相环电路
锁相环电路的步进频率为5或6.25kHz。16.8MHz的参考振荡
器信号通过一个混合计数器在芯片 IC1 中被分频生成 5 或
6.25kHz 参考频率。压控振荡器（VCO）输出信号通过 Q15 被缓
冲放大，然后在芯片 IC1 中被双模可编程计数器分频。被分频
的信号在带有5 或6.25kHz参考信号的相位比较器的芯片 IC1中
被比较。从相位比较器输出的信号进入一个低通滤波器后，通
过压控振荡器控制振荡频率。（参见图 6）
■压控振荡器
在发射模式中通过Q11产生操作频率，在接收模式中通过
Q10产生操作频率。控制信号通过相位比较器到变容二极管 (在
发射中为D10和 D12，在接收模式中为 D9和D11)。 在接收模式
中，由于Q12和Q7切断Q11并且导通 Q10 ，所以发射／接收管
脚设置为低电平。发射-接收管脚在发射模制内被设置为高电
频。来自于Q10 和Q11的输出被 Q15放大并送至RF放大器。
CIRCUIT DESCRIPTION / 电路说明
D10,12
Q11
TX VCO
Q15
BUFF
AMP
D9,11
Q10
RX VCO
Q7,12
T/R SW
Charge
pump
LPF
Phase
comparator
1/M
1/N 5kHz/6.25kHz
5kHz/6.25kHz
REF
OSC
16.8MHz
PLL
DATA
IC1 : PLL IC
Q3
AMP
Fig. 6 PLL circuit / 图6 锁相环电路

19
TK-8108
■Unlock Circuit
During reception, the 8RC signal goes high, the 8TC sig-
nal goes low, and Q29 turns on. Q31 turns on and a voltage
is applied to the collector (8R). During transmission, the
8RC signal goes low, the 8TC signal goes high and Q30
turns on. Q33 turns on and a voltage is applied to 8T.
The CPU in the control unit monitors the PLL (IC1) LD
signal directly. When the PLL is unlocked during transmis-
sion, the PLL LD signal goes low. The CPU detects this
signal and makes the 8TC signal low. When the 8TC signal
goes low, no voltage is applied to 8T, and no signal is trans-
mitted.
IC6
CPU
Q29
SW
Q31
SW
IC1
PLL
Q30
SW
Q33
SW
LD
8RC
8C
8R 8T
8TC
PLL lock
: LD "H"
Fig. 7 Unlock circuit / 图7 失锁电路
Q39
RF AMP
2SC5108
(Y)
Q23
RF AMP
2SC3357
Q25
ANT
RF AMP
2SC3357
IC101
POWER AMP
S-AU27AM(K3)
Q20
RF
2SC4649
(N,P)
IC3 Q11
D/A
CONVERTER
M62363FP
X1
TCXO
16.8MHz
VCO
2SK508NV
(K52)
IC1
PLL
MB15A02
Q15
BUFFER
2SC5108
(Y)
Q3
RF AMP
2SC4649
(N,P)
IC4
BUFFER
NJM2902V
IC3
D/A
CONVERTER
M62363FP
IC22IC21(1/2)MIC
MIC/IDC
NJM2100V
Splatter
FILTER
NJM2904V
IC6 IC3
MIC KEY
INPUT
CPU
784214GC
D/A
CONVERTER
M62363FP
IC4
SUM AMP
NJM2902V
Fig. 8 Transmitter system / 图8 发射部系统
Transmitter System
■Outline
The transmitter circuit produces and amplifies the de-
sired frequency directly. It FM-modulates the carrier signal
by means of a varicap diode.
■Power Amplifier Circuit
The transmit output signal from the VCO passes through
the transmission/reception selection diode (D19) and ampli-
fied to a specified level of the power module (IC101) by the
drive block (Q23, Q25 and Q39). The amplified signal goes
to a low-pass filter. The low-pass filter removes unwanted
high-frequency harmonic components, and the resulting sig-
nal is goes the antenna terminal.
CIRCUIT DESCRIPTION / 电路说明
■失锁电路
在接收的过程中，8RC信号为高电平，8TC信号为低电平，并
且Q29 导通。Q31 导通并且向集合器（8R）提供电压。在发射
过程中，8RC 信号为低电平，8TC 信号为高电平，并且 Q30 导
通。Q33 导通并且向 8T 提供电压。
控制单元中的 CPU 直接监听锁相环电路（IC1）LD 信号。当
发射过程中锁相环电路失锁时，锁相环电路 LD信号为低电平。
CPU 检测此信号并使 8TC 信号变为低电平。当 8TC 信号为低电
平时，不向 8T 提供电压，并且不发射任何信号。
发射部系统
■概要
发射部电路直接产生和放大需要的频率。通过各色二极管的
含义对载波信号进行频率调制。
■功率放大器电路
来自于压控振荡器的发射信号经过发射/接收选择二极管
(D19) 并通过驱动装置(Q23, Q25和Q39)被放大为功率模组
(IC101)的一个特定电平。 被放大的信号进入一个低通滤波器。
此低通滤波器消除不需要的高频谐波成份，获得的信号进入天
线终端。

20
TK-8108
■APC Circuit
The automatic transmission power control (APC) circuit
detects part of a power module output with a diode (D34,
D36) and applies a voltage to IC12. IC12 compares the APC
control voltage (PC) generated by the D/A converter (IC3)
and DC amplifier (IC4) with the detection output voltage to
control Q27 and Q101, generates DB voltage from B volt-
age, and stabilizes transmission output.
The APC circuit is configured to protect over current of
the power module due to fluctuations of the load at the an-
tenna end and to stabilize transmission output at voltage
and temperature variations.
■Memory Circuit
The transceiver has an 8k-bit EEPROM (IC7). The
EEPROM contains adjustment data. The CPU (IC6) controls
the EEPROM through three serial data lines.
Control Circuit
The CPU carries out the following tasks:
1) Controls the WIDE, NARROW, TX/RX outputs.
2) Adjusts the AF signal level of the AF filter (IC10) and turns
the filter select compounder on or off.
3) Controls the DTMF decoder (IC9).
4) Controls the display unit.
5) Controls the PLL (IC1).
6) Controls the D/A converter (IC3) and adjusts the volume,
modulation and transmission power.
Fig. 9 APC circuit / 图9 自动功率控制电路
Fig. 10 Control circuit / 图10 控制电路
Fig. 11 Memory circuit / 图11 存储器电路
CIRCUIT DESCRIPTION / 电路说明
RF
AMP
Q39,23
RF
AMP
Q25
POWER
MODULE
IC101
APC
DRIVER
Q101
DB
+B
Q27
APC
CONTROL
DC
AMP
IC4
ANT
SW
D30,31,32
LPF
ANT
POWER
DET
D34,36
IC12
APC
CONTROL
D19
PC
IC3
3pin
IC3
D/A
converter
IC1
PLL
IC9
DTMF
DECO.
IC6
CPU
DTMDAT
DTMCLK
DTMSTD
DAST
CNTDT
CNTCK
PLLE
DT
CK
EEPCK
IC6
CPU
IC7
EEPROM
EEPDT
EEPWP
■自动功率控制电路
自动发射功率控制 (APC) 电路使用一个二极管 (D34，D36)
检测功率模组输出的一部分，并向IC12提供电压。IC12比较通
过数/模转换器 (IC3) 生成的自动功率控制电路控制电压 (PC)，
带有检测输出电压的直流放大器 (IC4) 控制Q27和Q101，从B电
压生成DB电压，并使发射输出稳定。
自动功率控制电路的构成用于防止由于天线终端负载的波动
而产生的功率模组的过载电流并且使发射输出电压和温度变化
稳定。
■存储器电路
车载台具有一个8k-bit EEPROM (IC7)。EEPROM包含调整数
据。CPU (IC6) 经过三条串行数据线控制EEPROM。
控制电路
CPU 具有下述任务∶
1) 控制宽、窄、 发射 / 接收输出。
2) 调整AF滤波器(IC10)的AF信号电平并且开启或关闭滤波器
选择混合器。
3) 控制DTMF解码器 (IC9)。
4) 控制DTMF 解码器 (IC9)。
5) 控制锁相环电路 (IC1)。
6) 控制数/模转换器 (IC3) 并且调整音量，调制和发射功率。