Albrecht Tectalk Bedienungsanleitung

SERVICE MANUAL

2-WAYPORTABLE

HANDHELD PMR

RADIO

TECtalk

Jan. 2000

CONTENTS

1. GENERAL

1.1General

1.2Characteristics andfeatures

2. SPECIFICATION

2.1General Specification

2.2Electrical Specification

3. OPERATION

3.1Pushbuttons

3.2ICONS onLCD

3.3Key Functions

3.4SettingandOperation

4. ADJUSTMENT

4.1Frequency synthesizer

4.2Transmitter

4.3Transmitter test

4.4Receiver

4.5Receiver test

4.6Symptoms,check point& corrections

5. DESCRIPTION OF RADIO CIRCUIT

5.1Frequency Synthesizer

5.2Receiver

5.3Transmitter

6 CHANNELDATA

1. GENERAL

1.1 GENERAL

TECtalk is aminimum sizedtwo-wayportablehandheldradio.

The frequency range is446.00625 ~ 446.09375MHz, 8 UHF operatingchannels

accordingtoEuropeanPMR 446 internationalagreementareavailable.

1.2 CHARACTERISTICS AND FEATURES

a) All activedevices inthis radioaresemiconductors and highdensity IC.

b) Theradiois designedvery compact and theweight isapproximately140gincluding

battery.

c) The unit is equippedwithCPU HD404889 fromHITACHI.

d) Power supply is designedforbattery operation with4cells alkaline(1.5V AAA)

batteriesor

4cells rechargeableNiMH batteriesof thesamesize.

e) Theradiois shippedwithfixed (non-detachable) rubber duck antennaandbelt

clipand carryingstrip.It comeswithout batteries. Other equipment is optional.

2. SPECIFICATION

2.1 GENERALSPECIFICATIONS

a) Frequency Range: 446.00625 ~ 446.09375MHz

b) Output Impedance: 50Ωunbalanced

c) ModulationType: 8K0F3E

d) Communication Mode:semi-duplex

e) Channel Capacity :8channels

f) Channel spacing:12.5kHz

g) Power : 6.0V(alkaline), 4.8V (NiMH)

h) Battery Life:ALKALINE: at1000mAh>30hours (Tx5%, Rx5%, Stand-by90%)

i) OperatingTemperature: -20 degrees C to+60degrees C

j) Dimension: 95.5(H)x 50(W)x 26(D)mm

k) Weight: 132 g(withBattery)

2.2 ELECTRICALSPECIFICATION

a)TRANSMITTER

1) Outputpower : Max. 500mW

2) Frequency Stability : ±5ppm(-20 ~+60 )

3) ModulationMethod:FM

4) Oscillation Method: PLLSYNTHESIZER

5) Max. Frequency Deviation: <+/- 2.5kHz (withtone)

6) Cooling Method: air-cooling Method

7) Spurious Emission : < -36dBm /-30dBm

8) FMHum/Noise: > -40dB (1kHz 60% modulation,w/CCITT)

9) Distortion: < 5% (1kHz 60%modulation)

10) Tx AudioResponse: 6dB/OCT +/- 3dBPRE-EMPHASIS (300Hz~2.5kHz)

b) RECEIVER

1) ReceiveMethod: DoubleSuper Heterodyne

2) ReceiveSensitivity : < 0.28uV(20dB SINAD w/CCITT)

3) SquelchSensitivity :6to8dBat12dB SINAD

4) Bandwidth: > 3kHz(6dBATT point)

5) Selectivity: < -60dB(25kHz)

6) Local Frequency Stability :+/- 5 ppm( between –20degreesC and+60degreesC)

7) Spurious Response: > 40dB

8) Audiooutput:200mW(Internal8Ohms loadTHD 10%) Ext:100mW

9) Distortion: < 5% (1kHz 60%Modulation)

10) RXAudioResponse: 6dB/OCT +/- 3dBDE-EMPHASIS (300Hzto2.5kHz)

11) S/N Ratio:< 40dB (1kHz 60%modulationw/CCITT)

12) IF : 1'st IF = 21.7MHz

2'ndIF = 450kHz

13)Local Frequency :

1st Local Frequency= fc - 21.7MHz

2ndLocalFrequency = 21.25MHz

3. OPERATION

3.1 PushButtons andControls

1) Battery Door

2) Monitor Button

3) DetachableBelt Clip

4) Push-To-Talk (PTT) Button

5) Antenna

6) External Mic / Speaker

7) Built-inSpeaker

8) LCD Panel

9) Built-inMicrophone

10) UpButton& VolumeControl

11) DownButton&VolumeControl

12) FunctionButton

13) PowerOn/Off & EnterButton

3.2 ICONS on LCD

1) RSSI(Receiving SignalStrength Indicator) or TX Bar Icon

Indicatesthereceivingsignalstrengthandblinksduring

transmission.

2) Monitor Indicator

Appears when themonitorbuttonis used.

3) CTCSS Indicator

Blinks whenthe correctCTCSStoneis entered.

4)Auto ChannelScan Indicator

Appears intheautoscan modeor whentheautoscan modeis

activated.

5) DualWatch ScanIndicator

Appears indual watchscanmodeor whenthe dual watchscanmode is

activated.

6) KeyLockIndicator

Blinks inautolockselectionmodeor whenthe key lock is

activated.

7) VOX Indicator

Blinks inVOX selectionmodeor appears whenVOX is activated.

8) BatteryLevelIndicator

Battery Level Meter indicatestheremainingbattery strength.

9) PowerSave Display

Blinks whenthe power saveis activated.

The rateatwhichthe iconblinksvarieswiththepower saving

ratio.

Fast indicatesalowerpower saving whileslow indicatesahigher

Power savingratio.

10)TxIndicator

Appears when asignal is beingtransmitted.

11) RxIndicator

Appears whenasignal isbeingreceived.

12) LargeSegment Display

Indicates the channelnumber inuseat thenormalmode.

When theFunctionButton ispressed, it displays the function menu

insequence:CH / SC / dW/ UO /Udt / ALo/ CAL/ ton

13) Small Segment Display

Displays theCTCSStoneoptionat thenormal mode.

CTCSS option isdisplayedinHz.

Displays theSUBMENU of eachMENU inthefunction mode.

(e.g.CH 1~69/ SC: up,dn/ dW: channel number/

UO: high,off,low/ Udt:5sec, 3sec, 2sec, 1sec/ALo:off, auto/

CALnumber:1-7/ton:no-Freq) 3.3KeyFunction

3.3 KeyFunctions

3.3.1ENTER BUTTON(#13)

1) Short Touch - PowerOn

Press this button(#13)briefly toturntheuniton.

A short confirmingmelodywill play.

2) Long Touch - PowerOff

Press this button(#13)for longer than1.5seconds toturntheunitoff.

Note:Press it toconfirm therequiredoption for respective functionsduring

function editmode.

3.3-2FUNCTIONBUTTON(#12)

1) Short Touch

Press this buttonbriefly toenterfunctionedit modeinstandby mode.

2) Long Touch

Press for longer than1.5seconds toactivatetheKEYLOCK inthe

standby mode.

Pleasenoteall buttonswill bedisabledexceptthe Monitor Button(#2)

andPTTButton (#4) will remainfully operational.

3.3.3UP BUTTON(#10)

1) Short Touch

Inthestandby mode,pressthis button briefly tomovetothenext

higher mainvolumelevel.

Inthe function edit mode,press briefly toshiftfrom thecurrent

option ineachsubmenutothe nextoption inthesamesubmenu.

2) Long Touch

Pressingthis buttonfor morethan1.5secondswill allow you tonavigate

atamorerapidratethroughdifferent volumelevelinthe standby mode

or through different menus inthefunctionedit mode.

3.3.4DOWNBUTTON(#11)

1) Short Touch

Inthestandby mode,pressthis button briefly tomovetothe next

higher mainvolumelevel.

Inthe function edit mode,press briefly toshiftfrom thecurrent

option ineachsubmenutothe previousoptioninthe samesubmenu.

2) Long Touch

Pressingthis buttonfor morethan1.5secondswill allow you to

navigateatamorerapidratethrough different volumelevel inthe

standby mode or throughdifferentmenus inthe functionedit mode.

3.3.5PUSH-TO-TALK (PTT) BUTTON(#4)

Press it firmly andspeak intotheBuilt-inMicrophone (#9) totransmit.

The red TxLED Indicatorattheright side of theLCD Panel (#8) will

be on.

Releaseittoreverttostandbymode.Whenanincomingcall is received,

thegreenRx LED Indicator onthe leftsideof the LCD Panel (#10) will

be on.

Call ToneTransmission

Press thePTT Buttontwicequickly tocall anotherparty onthesame

channel. ThewordCALLandtheTx iconwill appear inthedisplay.

The userselectedcall ringer melody will play.

3.3.6MONITOR BUTTON(#2)

Press it tocheck activity onthecurrent channel beforeyoutry to

transmit.

Adjust the VolumeControl (#10, #11) if necessary.

When youpress theMonitorButton,theLCD Panel (#8) will be illuminated

withanambercolorback-lightand boththeTx andRx LED Indicators will

be on.

Ifyoupress theMonitor Buttonduringthe functioneditmode,youwill

returntostandby modedirectly.

3.3.7EXTERNALMIC/SPEAKER (#6)

This jack accepts anoptional headset/microphone for totally handsfree

operation.

Pleaserefer totheuser manual orAlbrecht catalogue.

SeealsosectionregardingVOX SELECTION MODE.

3.4 SettingandOperation

3.4.1BASIC CHANNEL SELECTION

Inordertocommunicatewithother PMR units,bothyouandthereceiving party

must beonthesamechannel. Tectalk has 8 channels (1-8) asindicated by

thelargedigits intheLCD DisplayPanel (#8).

Before,tryingtotransmit on theselectedchannel, you shouldpress the Monitor

Button(#2) tocheck theactivity onthat channel.

Ifsomeoneis alreadyontheselectedchannel, youshould try another

channel whichis notoccupied.

Tochangethe basicchannel,inthestandbymode,press the

Up Button (#10) briefly tomovetothenexthigher mainchannelnumber.

Press the Down Button (#11) briefly tomovetothe next lower mainchannel

number.

3.4.2CTCSS (Coded ToneControlled SquelchSystem)

SUB-CHANNEL SELECTIONMODE

This featureallowsyoutohavemoreprivacy onthemainchannelbyusingtonecodes

(internationalnumberingsystem00-38)withinamainchannel. This enablesyou to

communicatewithYourpartners on the samemainchannelwhen all partnerstationsuse

the samesubcode.This helpstoavoidcongestion onthe mainchanneland filters out

unwantednoise,static andother stations usingdifferent codes.

Thereare38CTCSS subchannels for eachmain channel.

TochangetheCTCSSsubchannel,

Press theFunctionButton(#12)until thewordcTcappears intheLCD Panel (#8).

Press the UpButton(#10)orthe DownButton (#11)tochoosethe desiredsubchannelto

use.Thecorrespondingsubcodefrequency will be displayedinthelower right corner.

Press theEnterButton(#13) toconfirm your selection.

NOTE:

Tocommunicatewith other PMR units, theymust beswitched to thesame

channel andCTCSSsubcode. Tocommunicate withother LPD units thatdo

nothavesubcodes, switchyour unit tothesamechannel withthesubcode

set toOFF.

3.4.3AUTO CHANNEL SCANMODE

This featureallows youtoscanforan activechannelandcommunicatewiththeparty

transmitting.

Toaccess the Auto ChannelScanmenu,pressthe Function Button(#12)until the auto

channel iconblinks andSCappears inthe LCD Panel (#8).

Press the UpButton (#10)ortheDownButton (#11)tochoosescanningupordownfrom

thecurrent channelnumber.

Press theEnter Button(#13) toconfirm your selection.

The unit will beginscanning foranactivemainchannel. Ifatransmissionis detected,the

Rx andRSSIiconswill appear intheLCD Panel (#8).

Toturnoff the autochannelscanfeatureinthestandby mode, simplypress theFunction

Button(#12)once.

3.4-4DUAL WATCHSCAN MODE

This feature allowsyoutomonitortwo differentchannelsatthesametime. If youpre-set

anypriority channel other thanthe current channelinuse,thepre-setchannelwill be

scannedevery 0.5second andsignals youwhenacall is received.

Toaccess theDualWatchScanmenu,

Press theFunctionButton(#12)until thedual watchiconblinks anddW

appears intheLCD Panel(#8).

Press theUpButton(#10)or theDownButton (#11) to select thedesired

channel number youwishtoclosely monitor.

Press theEnterButton(#13) toconfirm your selection.

Toturnoffthedual watchfeatureinthestandbymode, simplypressthe

FunctionButton (#12) once.

3.4-5VOX SELECTIONMODE

The VoiceActivatedTransmission(VOX) function allows your voicetoactivate

transmissionautomatically whentheCommunicator is usedwithanoptionalhandsfree

mic/headset, orevenwiththe built- inMicrophone.tton(#4)withoutusingthePTT button.

Toaccess theVOX Selectionmenu,

Press theFunctionButton(#12)until theVOXiconblinks andUO appears intheLCD

Panel (#8).

Press theUpButton (#10)ortheDownButton(#11)toselectfromhigh,loworoff.High or

low settingdeterminesVOX responsesensitivity.

Press theEnterButton(#13) toconfirm your selection.

ToturnofftheVOX feature,enter theVOX selection modeandthenselect Off.

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