Tait T2010-313 Mobile Transceiver User Manual 2k3 03

Tait Limited Mobile Transceiver 2k3 03

user manual part 5

  This Section provides information on T2000 Series II accessories.The following accessories are covered in this Section:Section Title PCB IPN Page8.1 T2008 Power Supply 220-01170-03 8.1.18.2 Connection To External Devices 8.2.18.3 T2000-500 & T2000-600 1-7W Versions 8.3.18.4 T2000-05 Remote Speaker Kit 8.4.18.5 T2000-A06 Desktop Microphone Kit 8.5.18.6 T2000-A07 DTMF Microphone Kit 8.6.18.7 T2000-34 Selcall Kit 8.7.18.8 T2000-A36 Selcall Kit 220-01313-02 8.8.18.9 T2000-40 DTMF Kit 8.9.18.10 T2000-A450X CTCSS & Scrambler Kits 220-01335-04 8.10.18.11 T2000-A50 Handsfree Kit 225-01210-03 8.11.18.12 T2000-A60 Dual Port UART Kit 220-01251-01 8.12.18.13 T2000-A66 Single Port UART Kit 220-01348-04 8.13.18.14 T2000-A80 Line Interface Kit 220-01272-02 8.14.18.15 T2000-A70 Data Modem Kit 220-01378-01 8.15.18.16 T2000-A03/-A04/-A16 Remote Loom Kits 8.16.1
 
  The following topics are covered in this Section:Section Title Page8.1.1 Operation 8.1.28.1.2 Performance Specifications 8.1.38.1.3 Precautions 8.1.58.1.4 Circuit Operation 8.1.68.1.5 Installation 8.1.88.1.6 Introduction To Servicing 8.1.108.1.7 Setting Up The Power Supply 8.1.128.1.8 Fault Finding 8.1.148.1.9 Repair 8.1.158.1.10 PCB Information 8.1.17
  The T2008 Power Supply is a mains operated power supply designed to provide the DCsupply requirements of the T2000 Series II radios. It uses switch mode technology tocontrol the regulation of the output voltage, which results in a power supply with ahigher temperature rating, improved efficiency and greater reliability.The power supply can either be operated with the radio sitting on top as a desk top unit,or with the radio and power supply detached as two separate units (refer to Section8.1.5, “Installation”).The T2008 has protection circuits for overcurrent, overtemperature and overvoltage pro-tection circuitry. Current limiting is included to restrict the peak current to about 9.5A.In addition, a self-restoring thermal shutdown keeps the temperature of the switchingtransistor within the ‘safe operation area ratings’. The point of thermal shutdown is alsodependant on the load current, to allow for a higher duty cycle rating at lower outputcurrents. The output voltage and thermal shutdown points are factory preset.The power supply also has a limited capability to float charge a lead acid battery underconstant voltage conditions (refer to Section 8.1.5, “Installation”).
  T2000-21, -23, -24:Voltage .. 230V ±10% (limits: 207-253V AC)Frequency .. 50HzT2000-22:Voltage .. 115V ±10% (limits: 105-130V AC)Frequency .. 60HzPower .. 200VA maximum(mains input +10%, current limited output)Mains Supply Plug:T2008-21 .. New ZealandT2008-22 .. USAT2008-23 .. UKT2008-24 .. EuropeanVoltage .. 13.8V DC (adjustable 12.5 to 14.5V)Current:Intermittent Operation .. 6.5A at 33% duty cycle (maximum 2 (TA = 25°C, input 230V) minutes on)Peak Rating .. 8A max. (duration limited by thermalshutdown)Continuous Rating .. 4.5A maximum(TA = 25°C, input 230V)Voltage Regulation .. ±5%(supply variation ±10%, currents up to 6A, temp. range -10°C to +60°C)Current Limiting (TA = 25°C) .. 9.5A nominal(10A secondary fuse available)Overvoltage .. 16V ±5% by zener transientsuppression diode (not self-restoring)Thermal Overload .. shutdown occurs at approximately(‘cold’ start @ 25°C, input = 115/230V) 95°C heatsink temperature (7A continuous after 1 hour)
 Input:Primary Fuse:T2008-21, -23, -24 .. 1A time delayedT2008-22 .. 3AThermal Cutout .. integral with transformerRipple and Noise .. less than 10mVrms0 to 6.0A, mains voltage ±10%Operating Temperature Range .. -10°C to +40°CWeight .. 3.0kgDimensions:Height .. 95mmLength .. 225mmWidth .. 150mm
   !"#$%&The power supply contains voltages that may be lethal. The unit should not be disman-tled without first disconnecting the mains supply. Servicing should be carried out onlyby qualified technicians.!"%If the power supply is operated at high output currents and/or a high duty cycle ratefor a prolonged period of time (e.g. more than 10 minutes), the heatsink will becomevery hot. Do not touch.Do not operate the power supply in a sealed cabinet. Ensure that there is an adequateairflow past the unit, and in particular past the heatsink at the back of the unit.!"'!(If the mains supply cord needs replacing, it must be replaced with a mains supply cordof the same size and type as originally fitted.!"When using a T2008 and radio at a fixed location, it is advisable to check the maximumallowable transmit power, as defined by the local radio regulatory authority. This iscommonly in the range of 1 to 5W, and exceeding this output power may result in pros-ecution.!"!)&If the duty cycle (33%) of the radio and power supply is likely to be exceeded, then theradio output power must be reduced to ensure that the current drawn from the powersupply does not exceed its rating.It is advisable to check the current drawn from the power supply, regardless of dutycycle, if the radio is operated at full power (25W). Variations in antenna VSWR canresult in current drain, which may exceed the rating of the supply.
*  !Refer to the diagram to the rear of this Section.)The mains supply is connected to the primary of the transformer via the supply cord,input fuse and on/off switch.A conventional bridge rectifier is used across the secondary winding of the transformer,with both positive and negative leads being isolated from earth. Five PCB mountedsmoothing capacitors are used to produce a 23V DC bus from the 18Vrms secondary ofthe transformer. The ripple on the DC bus is 4V peak to peak, with an output current of6A.The front panel LED is illuminated when mains power is applied.$Voltage regulation is provided by the complementary Darlington configuration of Q1and Q2. The switching of this pair is derived directly from IC1 (TL494).When Q1 is turned on, current flows in inductors L1, L2 and L3 to supply the output.Capacitors C6 and C7 hold the output voltage at a nominal 13.8V. When Q1 turns off,the current flowing in the inductors continues to flow, via diode D1.C8, C9 and L3 form a common mode filter to suppress conducted noise at the output.!!A pulse width modulating IC (IC1) controls the switching of Q1 and thus the regulationof the output voltage. A voltage divider (R4, R5 and RV1) converts the output voltage toa 5V nominal level. It is then compared to IC1s temperature compensated internal 5Vreference. The length of time Q1 is turned on is proportional to the difference betweenthe reference and the output voltage. Feedback compensation is provided by C10, C11,R6 and R7, while R10 improves the transient response for the feedback circuit.!#&Current limiting is provided by monitoring the voltage across the current sense resistor(R18). When the current is increased to approximately 9.5A, the voltage on pin 15 of IC1decreases to a point where the pulse width of the switching waveform decreases. Inaddition, a 10A fuse is provided in the secondary circuit of the power supply.
 +,%&Overvoltage protection is provided by diode D2 and fuse F2. D2 is a 16V zener transientsuppression diode that reacts instantly to overvoltage DC or spikes. If an overvoltagecondition persists, causing excessive power dissipation in D2, it will become short cir-cuit, causing F2 to blow. F2 will need to be replaced before operation of the power sup-ply is possible. D2 will need to be replaced to restore overvoltage protection.$$(Transistor Q3 is mounted on the heatsink and its junction temperature therefore closelyfollows that of both the heatsink and Q1. Q3 is biased by R12 and RV2. As the tempera-ture of the heatsink increases, the temperature of the base- emitter junction of Q3 alsoincreases, which results in the Vbe of Q3 decreasing. At 95°C, the base-emitter voltage isexceeded by the biasing voltage, and Q3 switches on. As a result, Q4 turns off, and the‘deadtime pin’ (pin 4 of IC1) is pulled high. The ‘deadtime’ is now 100%, which meansQ1 is completely turned off.
  The T2008 power supply is designed to provide the DC supply requirements of the TaitT2000 two way radios. It can be operated either with the radio sitting on top as a desktop unit, or with the radio and power supply detached as two separate units. The bot-tom case includes two screw recesses for wall mounting. The two way radio then can bemounted in its cradle next to the supply, or operated away from it, e.g. on a desk top,etc.If the radio and the power supply are operated away from each other, an extension cablefor the DC supply would have to be used. To keep the voltage drop of this extensioncable reasonably low, the wiring should be of sufficient gauge to carry the required load.It is recommended that a minimum wire size of 1.5mm is used.The power supply requires a mains supply of 230V nominal 50Hz or 115V nominal60Hz, as set out in Section 8.1.2.If the power supply is run at a high duty cycle rate, high continuous output currentsand/or high mains input voltage, it will generate a considerable amount of heat. Anadequate flow of cooling air past the unit, particularly past the heatsink, is thereforeessential for reliable operation. Do not operate the power supply in a completelyenclosed cabinet. Do not touch the heatsink after prolonged heavy duty operation. Keep theheatsink away from anything affected by heat (plastics, etc).The microphone clip supplied with every power supply may be attached to the side ofthe top cover with the supplied screws and spacer, which fits between the clip andcover. The hook switch monitor wire should be connected as shown in the wiring dia-gram.
 -.!$&&#((/The power supply has a limited capability to float charge a lead acid battery under con-stant voltage conditions. The performance is limited by the way the power supply’scontinuous output current rating is limited (typically 4.5A at 20°C).The following diagram shows an external protection circuit, consisting of two diodeswith the appropriate ratings (i.e. 10A/50V), to be used when float charging a lead acidbattery. This circuit prevents damage to the power supply due to reverse current, or thebattery being connected with reverse polarity.The current limit prevents charging from being excessive, should a discharged batterybe connected. The output voltage of the power supply does not compensate for the tem-perature dependence of lead acid batteries.
 * (,&All sub-assemblies within the T2008 power supply (e.g. transformer, PCB/heatsink) arehoused in a specially moulded plastic case with no screws. The top and bottom halvesof the plastic case are fastened by four self-tapping screws.All electrical components except the transformer and LED are mounted on either thelarger regulator/heatsink PCB or on the smaller mains input PCB.Disassembly Disconnect the unit from the mains supply before attempting to removethe top case.!"#$%&The power supply contains voltages that may be lethal. The unit should not be disman-tled without first disconnecting the mains supply. Servicing should be carried out onlyby qualified technicians.!"%If the power supply is operated at high output currents and/or a high duty cycle ratefor a prolonged period of time (e.g. more than 10 minutes), the heatsink will becomevery hot. Do not touch.Do not operate the power supply in a sealed cabinet. Ensure that there is an adequateairflow past the unit and in particular past the heatsink at the back of the unit.!"'!(If the mains supply cord needs replacing, it must be replaced with a mains supply cordof the same size and type as originally fitted.),$!Turn the unit upside down and remove the two self-tapping screws.Turn the unit back on its feet and remove the two top screws.Carefully lift the top case away from the unit.All the sub-assemblies are now easily accessible, and can be lifted out as neces-sary.
 )$$&012Unsolder the leads of the transistor using solder wick or a solder sucker.Remove the appropriate screws and carefully lift off the transistor.Mount the new transistor using a silicon insulating gasket on the underside. Donot use any other insulators (mica, etc) as they are unlikely to fit under Q1 and/orwould require thermal compound.Refit the two screws for Q1 from the copper side of the PCB. Isolate each of thesetwo mounting screws from touching the heatsink with a 3mm length of siliconerubber sleeving. Use spring washers under the two nuts.Carefully position the PCB onto the heatsink before tightening the two screws/nuts.Ensure that Q3 sits firmly against the walls in its slot on the heatsink.Resolder the leads of the transistor.)3Reassembly is carried out in the reverse order to disassembly.
 + &4$56)6(• Ammeter: 10A DC• Voltmeter: 0 - 20V DC• Load Resistor: 0 - 100Ω, 10A (variable)• Short circuit plug-in link: IPN 240-04020-62• Ohmmeter: infinity to 0ΩRefer to the T2008 circuit and wiring diagrams to the rear of this Section.Check with the ohmmeter that the heatsink is electrically isolated from the nega-tive output.Connect the variable load in series with the ammeter across the output terminals(see wiring diagram for the pin configuration of the output plug).Set the load to maximum resistance (minimum load current).Connect the DC voltmeter across the power supply output terminals.The DC output wiring should be of sufficient gauge to carry the load currentrequired. It is recommended that a minimum wire size of 1.5mm is used.Plug in the mains connector.%&Switch on the power supply.Set RV1 for an output voltage of 13.8V.Switch off the power supply.$$(072Before setting up the temperature shutdown, ensure that the power supply is atambient temperature, i.e. it has not been running recently with any significantload current. The temperature shutdown is based on a heatsink ambient tempera-ture of 25°C.Disconnect the load resistor.
 Insert the plug-in link (1 - 2).Switch on the power supply.Set RV2 (TSD) so that the power supply just shuts down.Switch off the power supply.Remove the plug-in link.!#Reconnect the load resistor.Switch on the power supply.Decrease the load resistance (current rises) and set it for an output current ofapproximately 9.5A.Decrease the load resistance and the voltage output should drop, indicating thatcurrent limiting is in progress.If the power supply is very hot, the current limit circuit may cause the unit toswitch off completely. If this occurs, switch off the mains supply and waitapproximately one minute. The power supply should now operate normally.
  ..(&The checks listed below have been included to provide assistance in locating faults. It issometimes convenient to disable a complete section of the power supply in order to iso-late a fault. If individual sections are isolated the rest of the unit should operate nor-mally (refer to Figure 8.1.2, “Typical Waveforms” for details).!!$8Faulty diodes and transistors can generally be found by a simple ohmmeter check, asfollows (an AVO model 8 or equivalent meter should be used for taking the measure-ments, using only the medium or low resistance ranges):Set the ohmmeter to the ohms x 1 range.Measure the forward and reverse resistance of each junction. The resistance in onedirection should be low (generally 30 to 100Ω), and the resistance in the otherdirection should be high. In a faulty transistor or diode, the junctions will usuallybe either short or open circuited. Other components in the circuit may affect these readings unless the junctionsare isolated.The collector current drawn by multijunction transistors is a further guide to their oper-ating performance.%&The following table shows voltages under normal operating conditions, and those fol-lowing thermal shutdown:Normal Operation(V) Thermal ShutdownOperating (V)output voltage 13.8 0Q3 base-emitter voltage 0.2 approx. 0.7 approx.Q4 base-emitter voltage 0.7 approx. 0 approx.IC1 pin 4 voltage 0 5IC1 pin 14(voltage reference) 55
  9,The following waveforms can be expected under the stated conditions.- )The T2008 power supply requires specialised component replacement techniques.Before attempting repair, refer to Section 3.4, “Repair”.
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 '$<'
 -()(=0:;+;2
 IC1To I012- Out- Out+ Out4 Way PowerConnectorto T 500 RadioExt. Speaker Ext. SpeakerLive7 way PowerConnector toT2000 RadioInternalSpeaker+ OutGndTo MicClipTo Mic ClipEarth MainsGreen/YellowEarth ShieldTransformerGreenFerriteBeadMainsLED RedLED BlackYellowTransformerSecondaryBlackYellowBlackBlack (-)Output Voltage SetThermalShutdownSetBlueBlueGreenGreenBrownBrownPrimaryFuseF1MainsSwitchTransformerT4063SecondaryRed (+)LEDEC7C5C4C2~-~+
 
 
 
 
  !5=7, (The spare external pin in the T2000 power connector (refer to Figure 8.4.1) may be wiredto any of the option connections tabled in Section 5.9, “Options Interface Specifications”.The most commonly used connections (hush, horn, emergency and auxiliary), areexplained below.The T2010 and T2015 can be programmed to have channel selection controlled via S15on the T2000 logic PCB. >$An active +5V signal is supplied to this line each time the PTT is pressed or a validtransmission is received (i.e. audio is heard), and is commonly used to mute a car radio.It may be connected directly to some modern stereo systems, otherwise an interfacedevice will be required. This signal is sometimes referred to as the ‘external mute’.>This is used in a Selcall system where an external alert has been programmed. An active+5V signal is supplied to this line when the radio goes into the external alert cycle. Thissignal will either be pulsed, steady or ringing, depending on the radio model and pro-gramming.5&This is used to put the radio into emergency mode for a Selcall system and is activatedwhen the input is switched to ground.=An active +5V signal is switched to this line when the front panel key (T2010, T2015 & T2020 models) or key (trunked models) isactive. This is programmable with both latching and momentary operation available.Fn
  !The spare external pin in the power connector is connected to an option by linking theappropriate option pin to the EXTERNAL pin on options connector S14 (refer to Section5.9, “Options Interface Specifications”).The recommended linking method is to crimp a short length of 7/0.2mm PVC wirebetween the appropriate connections on a 16-way Micromatch plug (IPN 240-00026-24),which can then be plugged onto the options connector. < /!7The front panel keys do not function when the T2010 or T2015 is programmed for chan-nel selection control via the BCD lines.Access to the BCD lines is via S15 on the logic PCB. Refer to Section 5.9, “Options Inter-face Specifications” details.
 !"#$%  ; <;*;+9%This Section describes how to convert a T2000-500 or T2000-600 radio to operatebetween 1 and 7W. T2000-500 and T2000-600 1 to 7W radios are currently type approved only inAustralia and Germany.The following topics are covered in this Section:Section Title Page8.3.1 Components Required 8.3.28.3.2 Fitting 8.3.28.3.3 Set-Up 8.3.48.3.4 Specifications 8.3.4
  !"#$% !)6(To convert a T2000-500 and T2000-600 to low power, the following components arerequired: .&1Refer to Figure 8.3.1.Remove L315, L316, L317 and *R319 from the top side of the PA.Crush and remove the ferrite bead which forms part of L314, so that only the wirelink remains.Description IPN QuantityLow PowerCommon Parts 56Ω SRF16 resistor 030-02560-20 2T2000-500/600 replacement transistor PCB 220-01287-00 1radio type label - 1appropriate type approval label - 1T2000-500 Low Power Parts 5p6 NP0 500V GRM42-2 chip capacitor 015-01560-06 222p NP0 500V GRM42-2 chip capacitor 015-02220-06 3T2000-600 Low Power Parts 4p7 NP0 500V GRM42-2 chip capacitor 015-01470-06 15p6 NP0 500V GRM42-2 chip capacitor 015-01560-06 118p NP0 500V GRM42-2 chip capacitor 015-02180-06 2L315*R319*L316L314L317*C330*C331*C332C300C346Replacementzero ΩresistorQ308
 !"#$% 2Refer to Figure 8.3.2.Remove the following components from the bottom side of the PA:C323, *C324, C325, *C327, *C329 and Q306.3Remove the output matching capacitors, *C330, C331 and *C332 from the top sideof the PA (shown in Figure 8.3.1).Solder the replacement capacitors in the original positions, as follows:4 Replacement Transistor FittingRefer to Figure 8.3.3.aTin the underside of the replacement transistor PCB.Place the PCB as shown, and sweat-solder into position, soldering the centre stripfirst, followed by the other strips.T2000-500 T2000-600*C330 5p6 -C331 5p6 4p7*C332 22p 5p6*C324Q306C325C323*C329*C327Q305SRF 16ResistorsTRANSISTOR SUBSTITUTEC239 C237T2000-500/600220-01287-000305d
  !"#$%bSolder the chip capacitors onto the replacement transistor PCB, in the positionsshown. Refer to the table below for capacitor values and the distance ‘d’.  The distance ‘d’ shown in Figure 8.3.3 is measured from the edge of the transis-tor top cap to the centre of the capacitors.cSolder the 2 SRF16 resistors in the positions shown. Keep the leads as short as pos-sible and ensure the resistors do not cause a short circuit.5Replace the radio type label and type approval certificate number label on theheatsink fins with the new type label and corresponding type approval certificatenumber label. ;41Adjust RV324 to set the required output power level. If the output power is set to 1W for RF control purposes, program the radio forhigh power and adjust RV324 for 1W.2Seal RV324 with permanent adhesive so that the power cannot be readjusted. Frequency Range:T2000-500 .. 400 to 470MHzT2000-600 .. 450 to 520MHzSupply Voltage .. 0.8 to 16V DCPower Output .. adjustable 1 to 7WTemperature Range .. -30°C to +60°CStability (power output set to >1W) .. transmitter stable into 5:1 VSWR(all phase angles)*d is 13mm if Q305 is a BLW81 transistorT2000-500 T2000-600Capacitor Value 22p 18pDistance (d) 14.5mm*11.5mm
&'()  ; )8?The T2000-05 remote speaker kit provides a 4Ω external speaker for T2010, T2015 andT2030 models. !)6(The T2000-05 kit contains the following components: .&1Choose a suitable mounting position for the speaker.With the speaker fitted to the mounting bracket, check that it does not interferewith the operation of any of the vehicle controls.2Fix the speaker mounting bracket securely in the chosen location with suitable fas-teners. Two M4 self tapping screws and ‘U’ type captive nuts have been suppliedfor this purpose. Check before drilling that the drill will not damage any components orwiring behind the panel.aIf drilling directly into metal, drill two 3.5mm holes in the appropriate locationsand secure the bracket with the supplied M4 self tapping screws.bIf mounting the bracket to any other material, such as plastic, drill two 4.5mmholes and attach the bracket with the M4 screws and captive nuts. Slide a captivenut over the edge of the panel to align with each hole, ensuring that the screw willpass through the larger hole to thread into the smaller hole.cIf neither of the above methods is appropriate, M4 screws, nuts and shakeproofwashers are equally suitable.3Attach the speaker to the mounting bracket with the thumbscrews.Quantity Description1 T2000 speaker complete with mounting bracket and thumb screws2 M4 self tapping screws2 ‘U’ type captive nuts for self tapping screws5m speaker wire complete with receptacles and speaker socket
 &'()4Refer to Figure 8.4.1.Remove the existing internal speaker link and insert the three speaker wire recep-tacles into the appropriate power connector holes, as shown.If the internal speaker is not required, cut the internal speaker ground link.5Plug the speaker into the socket provided on the speaker wire, neatly loop anyexcess wire and secure with a cable tie.Peel the protective plastic off the “Tait” label on the front of the speaker.Internal speaker link(T2010, T1015 & T2030:cut to disable)IgnitionExternalPower supply:13.8VGroundExternal speaker:GroundLive{Not normallyfitted
!(*+)   ;*78'$?  (The T2000-06 desktop microphone has an internal omni-directional dynamic element,pre-amplifier and compressor loop. The microphone output is adjustable by a potenti-ometer (R11) which is accessible through a hole in the bottom of the case.The desktop microphone has a switch provided for hookswitch monitoring, which canbe locked if required.  .&The T2000-06 has grommets for both Series I and II radios fitted to the microphone cord.1Remove the Series I grommet from the microphone cord.2Fit the desktop microphone lead to the T2000 control head microphone socket,then push the grommet in place.  ;*;4Both the desktop microphone and the T2000 radio have an internal compressor and it isadvisable that the T2000 compressor be disabled to avoid the possibility of ‘hunting’.This can be done either by disabling the T2000 compressor or by adjusting the outputlevel at the desktop microphone.'$(1Disable the internal T2000 compressor by solder shorting the pads labelled ‘ALCdisable’ on the logic PCB.2Observe the waveform at TP606 with an oscilloscope, and whistle into the micro-phone at close range.Adjust the output level of the microphone until the waveform is just below clip-ping.'$(1Leave the T2000 internal compressor enabled.2Set the transmitter average deviation by whistling into the microphone at therequired distance from the microphone.
  !(*+)3Adjust the output level at the microphone to approximately 80% deviation(±4kHz for wide band or ±2kHz for narrow band).  ,Under some conditions, the microphone may pick up excessive background noise. Inthis situation, the output can be reduced using either of the procedures describedbelow:1Change the value of R12 from 10kΩ to 47kΩ (refer to the circuit diagram). Thiswill result in a 10dB output reduction.2Fit a 2K2 pot parallel with the microphone element. Adjust the output level to suit.
!(*+)  
  !(*+)
#*,*+) ** ;+7'.'$?The T2000-07 DTMF microphone has an omni-directional dynamic element and internalDTMF tone generator. The DTMF tone level is adjustable by an internal potentiometer(VR1) which is accessible when the rear case is removed.The DTMF microphone is intended for use with all T2000 Series II radios.* .&The T2000-07 has grommets for both Series I and II radios fitted to the microphone cord.1Remove the Series I grommet from the microphone cord.2Fit the DTMF microphone lead to the T2000 control head microphone socket, thenpush the grommet in place.* 1The microphone LED is used to indicate ‘key pressed’. The LED is on for normaloperation and is off when a DTMF key is pressed.2The PTT switch changes the microphone input to the radio from DTMF tone to thedynamic microphone. This is to prevent the microphone signals distorting theDTMF tones.3The operation of a DTMF key automatically operates the transmitter PTT andholds it on for a short time after the release of the DTMF key. This is to hold thetransmitter on during interdigital pauses.* ;+;4Remove the microphone back cover and set the DTMF tone level to approximately80% deviation (±4kHz for wide band or ±2kHz for narrow band).7'.(0< 2The DTMF tone output is also fed into the receive data line and can be used to provide asidetone.1Refer to the diagram on the following page.Solder a resistor to S13 pin 9 (RX-BEEP) on the bottom side of the T2010 controlPCB.
* #*,*+)The value of the resistor adjusts the sidetone level and is between 100kΩ and470kΩ, typically 220kΩ.2Slide a length of silicone sleeving over the resistor, and connect a wire between theresistor and S11 pin 5 (RXD) on the pot PCB, as shown.TP606TP605TP603TP602TP601DISABLEALCFUSES13 pin 9Connect toS11 pin 5
#*,*+) *
* #*,*+)
-.) ++ ;?The T2000-34 kit provides selective tone calling (Selcall) facilities for T2010 and T2015model T2000 Series II radios. The Selcall kit consists of a small module and a 5MHz crystal that are fitted to theradio’s logic PCB. This option allows selective individual or group calls within a fleet ofradios, on channels that have Selcall programmed. Selcall parameters and features areset up and enabled during programming. Both Sigtec and International group formatsare supported by the T2000-34 PCB.Refer to Section 8.7.3, “Programming” for a list of user-selected features. The followingtopics are covered in this Section:Section Title Page8.7.1 Components Required 8.7.28.7.2 Fitting 8.7.28.7.3 Programming 8.7.3
+ -.)+ !)6(The T2000-34 kit contains the following components:+ .&Refer to Figure 8.7.1 and Section 7.10, “T2010 & T2015 HC05 Logic PCB”.1Remove the top cover of the radio by unscrewing the four cover screws, unscrewthe logic PCB and fold-out.2Unplug the connecting looms, if required.3Place the Selcall module flat on the logic PCB, as shown in Figure 8.7.1, with thecomponent side facing upwards.Solder the leads on the bottom side of the PCB and trim as necessary.4Fit the supplied 5MHz crystal flat on the PCB in location ‘#X502’ as follows:Peel the protective backing off the self-adhesive foam tape on the underside of thecrystal.Insert the crystal leads into the holes provided and press the crystal down ontothe PCB.Solder the leads on the underside of the PCB and trim as necessary.5Reconnect any looms that were unplugged in step 2.Refit the logic PCB to the radio and secure with the three retaining screws.Refit the top cover and secure with the four retaining screws.Quantity Description1 T2000-34 Selcall module1 5MHz crystal with insulator
-.) ++ &&The radio must now be reprogrammed to set the various Selcall parameters listed in thefollowing table. Refer to the manual supplied with the T2000-20 programming kit fordetails.Parameter SelectionTone Set CCIR, EIA, EEA, ZVEI-1, ZVEI-2, ZVEI-3, DZVEI, PZVEITone Frequencies 16 tones corresponding to the International Standard for the selected tone set, plus ‘no tone’Tone Period 20*, 33, 40, 50*, 60*, 70 & 100msLead-In Delay between 0 & 5100ms in 20ms stepsLead-In Tone any of the 16 valid tones, or ‘no tone’Decode Sequence individual or group decodeEncode presetGroup Decode Format Sigtec or InternationalAuto Acknowledge enabled or disabledGroup Dialling enabled or disabledX501SK505S8S3S2S15S14S13S1RV507R727R726R725R724R721R720R708R707R706R705R704R703R702R701R700R699R698R697R696R695R694R693R692R691R690R689R688R687R686R685R684R683R682R681R680R679R678R677R676R675R674R673R672R671R670R669R668R667R666R665R664R663R662R661R660R659R658R657R656R655R654R653R652R651R650R649R648R647R646R645R644R643R642R641R640R639R638R637R636R635R634R633R632R631R630R629R628R627R626R625R624R623R622R621R620R619R618R617R616R615R614R613R612R611R610R609R608R607R606R605R604R603R602R601R600R599R595R593R592R586R585R584R583R582R581R580R579R578R575R574R572R571R570R569R568R547R546R544R543R542R541R540R539R538R537R536R535R534R533R532R531R530R529R528R527R526R525R524R523R522R521R520R519R518R516R515R514R513R512R511R510R509R508R507R506R505R504R503R502R501Q608Q607Q606Q605Q604Q603Q602Q601Q520Q510Q509Q508Q507Q506Q505Q504Q503Q502Q501L501IC614IC604IC603IC602IC601IC513IC511IC509IC507IC506IC504IC501D500C705C702C651C650C648C647C646C645C644C643C642C641C640C639C638C637C636C635C634C633C632C630C629C628C627C626C625C624C623C622C621C620C619C618C617C616C615C614C613C612C611C610C609C608C607C606C605C604C603C602C601C600C547C546C545C544C543C542C541C540C530C529C528C527C526C525C524C522C521C520C519C518C517C515C514C509C507 C506C505C504C503C502C501AC501C500#X502#SPEC9#SPEC8#SPEC7#SPEC6#SPEC5#SPEC4#SPEC3#SPEC2#SPEC10#SPEC1#RV508#R723#R722#R714A#R714#R713#R712#R711#R710#R651#R596#R595#Q508#IC512#IC510#C704#C703#C701#C700#C631#C630P2P1#X502T2000-34
+ -.)* These tone periods are not defined by international standards. Wherever possible,use the international standard tone periods.Deferred Calling enabled or disabledANI Sequence leading, trailing or random encodingEmergency Sequence enabled or disabledAlert internal and external durationsTone Blanking standardParameter Selection
-!)  ;*?The T2000-36 Selcall PCB plugs into an options connector on the top side of the logicPCB, and provides selective tone calling (Selcall) facilities for T2010,T2015, T2020 orT2050 model T2000 Series II radios.This option allows selective individual or group calls within a fleet of radios, on chan-nels that have Selcall programmed. Selcall parameters and features are set up and ena-bled during programming. Both Sigtec and International group formats are supportedby the T2000-36 PCB.The following topics are covered in this Section:Section Title Page8.8.1 Components Required 8.8.28.8.2 Fitting 8.8.28.8.3 PCB Information 8.8.4
 -!) !)6(The T2000-36 Selcall kit contains the following components: .&1Refer to Figure 8.8.1.Remove the top cover of the radio by unscrewing the four cover screws, unscrewthe logic PCB and fold-out.Position the T2000-36 PCB as shown, and plug into the connector on the T2000logic PCB:Quantity Description1 T2000-36 PCB assembly12mm PVC foam tapeModel PCB IPN Connector Circuit ReferenceT2010 & T2015 220-01377-01 P1T2020 & T2050 220-01344-02 #T3K44SK505S8S3S2S15S14S13S1P2P1T2000-36P1T2000-36
-!) 2Position the foam tape provided on top of XL2, on the T2000-36 Selcall PCB.3Carefully fold the logic PCB back in position and secure using the three logic PCBretaining screws.Refit the top cover.4Refer to the T2000 Programming Software User’s Manual (IPN 439-22000-02, orlater) for set-up information.
;*#0:;;2 -!) !/'$<'
-!) 
-!) *
-!) +
 -!)
.*,) -- ;7'.?The T2000-40 DTMF kit provides DTMF dialling facilities for T2020 model T2000 SeriesII radios. It consists of a small module which is fitted to the control head PCB. Onceinstalled, all parameters (such as tone durations and hold times) can be programmed asrequired.- .&1Remove the four screws from the back of the control head and remove the backcover, taking care not to lose the captive nuts. Unplug the connecting loom from the control head PCB, if required.2Refer to the diagram below.Place the DTMF module flat on the control head PCB in location ‘S20’ with thecomponent side facing upwards.Solder in place, checking that each pin is correctly positioned over the appropriatepad.3Reconnect the loom (if plugged in step 1), refit the loom cable into the cablerestraint in the back cover, and screw the cover back into place.Ensure that the captive nuts are correctly located in the back cover before fitting.- &&The radio must now be programmed with the various DTMF parameters. Refer to themanual supplied with the T2000-20 programming kit for details.T2000-40
- .*,)
./ '0)  ; @!!<3?The T2000-A450X CTCSS and scrambler PCB plugs into an options connector on the topside of the T2000 Series II logic PCB, and can be configured in two ways:The CTCSS option is used in trunked radios, and has 38 independent receive and trans-mit tones, set by solder links on the T2000-A450X PCB.The scrambler option can be used in either trunked or conventional radios, and is ena-bled/disabled by the auxiliary ( ) key (conventional models) or function ( )key (trunked models). The scrambler uses a simple frequency inversion algorithm thatprevents casual eavesdropping by other radio users. After descrambling, the recoveredspeech suffers from some degradation in clarity. The T2000-A4500 CTCSS kit is only compatible with the following radio andPGM software versions:The following topics are covered in this Section:Product Code Option T201X T2020 T203X T2040 T2050T2000-A4500 CTCSS xx xT2000-A4502 ScramblerRadio Radio Software Version PGM Software VersionT2030 3.24 or later later than 1.44T2035 3.28 or laterT2040 5.36 or later later than 2.57Section Title Page8.10.1 Components Required 8.10.28.10.2 Fitting 8.10.28.10.3 T2000-A450X Link Options 8.10.38.10.4 PCB Information 8.10.5Fn
 ./ '0) !)6(The T2000-A450X kits contain the following components: .&1Refer to Figure 8.10.1.Remove the top cover of the radio by unscrewing the four cover screws, unscrewthe logic PCB and fold out.2Select the T2000-A450X link options, as described in Section 8.10.3, “T2000-A450XLink Options”.Position the T2000-A450X PCB as shown, and plug into the connector on theT2000 logic PCB:2Position the foam tape provided on top of #IC5, on the T2000-A450X PCB.3Carefully fold the logic PCB back in position and secure using the three logic PCBretaining screws.Refit the top cover.Quantity Description1 T2000-A450X PCB assembly12mm PVC foam tapeModel PCB IPN Connector Circuit ReferenceT2010 & T2015 220-01377-01 or later P2T2020, T203X, T2040 & T2050 220-01344-02 or later #T3K45SK505S8S3S2S15S14S13S1P2P1T2000-45P2
./ '0)  ; @#8There are 2 groups of links on the underside of the T2000-A4500 PCB, the receive(R) group and the transmit (T) group. Each group contains 6 bits that are pulledlogic high or low, by either solder links or zero ohm resistors.The receive settings are set by links R-0 to R-5 and the transmit settings by links T-0 to T-5. A short to the 5V line represents a ‘1’, and a short to ground represents a‘0’.The following diagram shows the T2000-A450X PCB, with links indicated. ; !!!/#8The following table gives the linking details for the 38 independent transmit and receiveCTCSS frequencies. Tone Number R-5T-5 R-4T-4 R-3T-3 R-2T-2 R-1T-1 R-0T-0 CTCSSFrequency (Hz)1 000000 672 000001 71.93 000010 74.44 000011 775 000100 79.76 000101 82.57 000110 85.48 000111 88.59 001000 91.510 001001 94.811 001010 97.412 001011 10013 001100 103.514 001101 107.215 001110 110.9
 ./ '0); 3!/#8The T2000-A4502 has the following R settings linked during manufacture. The Tsettings have no effect.16 001111 114.817 010000 118.818 010001 12319 010010 127.320 010011 131.821 010100 136.522 010101 141.323 010110 146.224 010111 151.425 011000 156.726 011001 162.227 011010 167.928 011011 173.829 011100 179.93 0 011101 186.231 011110 192 .832 011111 203.533 100000 210.734 100001 218.135 100010 225. 736 100011 233.637 100100 241.83 8 100101 250.3R-5 R-4 R-3 R-2 R-1 R-0111111Tone Number R-5T-5 R-4T-4 R-3T-3 R-2T-2 R-1T-1 R-0T-0 CTCSSFrequency (Hz)
; @#0:; ;2 ./ '0) !/
* ./ '0)
./ '0) +
 ./ '0)
./ '0) -
 ./ '0)
123)  ; >(?The T2000-50 handsfree kit is designed for use with all T2000 Series II mobiles, andallows communication through the normal PTT microphone, or ‘handsfree’ operationthrough a directional microphone. When ‘handsfree’ operation is being used, the transmitter is activated either by the foot-switch (Manually Operated Transmit) or automatically, by detecting the sound of avoice. The latter is known as the Voice Operated Transmit (VOX) mode. VOX operationis only intended for use in quiet modern vehicles. With trunked radios, a call needs to be established before VOX or footswitchbecomes operative. Normal handsfree operation can be used on a conventionalchannel.The following topics are covered in this Section:Section Title Page8.11.1 Components Required 8.11.28.11.2 Fitting 8.11.28.11.3 Fitting The Complete Unit In The Vehicle 8.11.38.11.4 T2000-50 Set-Up 8.11.58.11.5 Signal Specifications 8.11.78.11.6 Specifications 8.11.88.11.7 Circuit Description 8.11.88.11.8 PCB Information 8.11.10
 123) !)6(The T2000-50 kit contains the following components: .&1Refer to Figure 8.11.1.Remove the top cover of the radio by unscrewing the four cover screws, unclip theD-range blanking plate in the rear of the T2000 radio, unscrew the logic PCB andfold-out.Position the T2000-50 PCB as shown, and connect the Micromatch connectors P13and P14 to S13 and S14 on the T2000 logic PCB.2 T2010 & T2015: Remove R513 (0Ω resistor) on the logic PCB.Quantity Description1 T2000-50 PCB assembly1 directional microphone (with optional sunvisor clip or tie clip)1 footswitch19 way D-range assembly with 2 in-line connectors & microphone socket attached1 shroud (alternative shroud - not required for T2000 Series II radios)1 2 way in-line connector 3 M3x8 pan Pozi Taptite screws2 4-40x¼ pan Pozi Taptite screws (black)
123) 3After manufacture, the T2000-50 PCB links are left open and will need to be cus-tomer selected. For details of optional links, refer to the Link Options Table in thecircuit diagram.Non-trunked radios: standard links are 4B and 5A.4Set up the T2000-50, as described in Section 8.11.4, “T2000-50 Set-Up”.A +5V logic signal is provided to indicate VOX activity (S21 pin 7). ‘VOX’ (violetwire) and ‘ground’ (grey wire) are both available from the D-range assembly redin-line connector.A spare in-line connector is also included in the kit for interfacing to an appropri-ate visual indicator e.g. an LED.5Carefully fold the logic and T2000-50 PCBs back in position, guiding the D-rangeconnector through the hole provided in the T2000 chassis.Check that no electrolytic capacitors are touching the T2000 chassis (e.g. C21 orC51.)6Secure using the three logic PCB retaining screws and the three M3x8 screws pro-vided and refit the top cover.Plug the D-range assembly provided in the kit into the D-range connector (S21). Holes are provided in the T2000 chassis for the D-range plug locking screws.Use the two black 4-40x¼ Taptite screws provided in the kit to form the threads. .&$!4$%$'$'&The handsfree directional microphone plugs into the T2000 via the D-range assemblymicrophone socket. The positioning of the microphone is important for correct opera-tion of the handsfree unit and some experimentation may be necessary to obtain the bestperformance from the VOX.• The microphone should be mounted in a position 20cm or less from the driver.• The microphone location should be free from vibration.• The microphone must face the driver..$'&The footswitch plugs into the D-range interface via the black 2 way in-line connector. Itis recommended that the footswitch be screwed to the floor. The 3m lengths of the footswitch and microphone can be effectively extendedby fitting a standard 9 way D-range extender cable between the radio and theD-range assembly. These extension cables are not included as standard but areavailable from most computer outlets.
 123))(&&The radio may need reprogramming to accommodate the handsfree unit. The key for the T2010, T2015 and T2020 or the key for trunked radiosmust be programmed for latching if VOX mode is to be used. Refer to the T2000 pro-gramming manual. For T203X and T2040 radios, the ‘handsfree’ option will also need to be selected under‘Specifications’ (refer to the ‘Specifications’ section of the programming manual).%=,Although the VOX circuitry has been designed to operate in varying conditions, it maybe necessary to change the minimum threshold for VOX operation.Monitor TP5 without the directional microphone connected and adjust RV67. TurningRV67 clockwise increases sensitivity, and anticlockwise decreases sensitivity. For the majority of applications, it is recommended that the setting is left at thefactory setting of 0.8V.Fn
123)   ; ;456)6( T2000-50 set-up should only be necessary after major repair.• AF signal generator• modulation analyser• high impedance voltmeter (e.g. VTVM)• oscilloscope• power supply (+13.8V)• RF power meter or load• 30dB RF attenuatorThe following diagram shows a typical test set-up.1Set up the equipment as shown in Figure 8.11.2, and set the audio generator to1kHz at a level of 0.8mV.Switch on the T2000 and check the increase in current with the T2000-50 fitted isless than 30mA.
* 123)2Switch on the MOX (Manually Operated Transmit) PTT and check that the modu-lation is at approximately 60% of full system deviation. Check that no audio pathis evident through the normal microphone.Activate the PTT on the normal microphone and check that there is now an audiopath through the microphone.3With no audio, adjust RV67 for 0.8V at TP5.Remove the TCXO PCB to operate the /IN-LOCK signal and check that the DClevel now goes to 6.5V ±0.5V. Replace the TCXO.4Increase the audio level by 10dB.With all PTTs off, activate the or keys (radio is in VOXmode).Sweep the audio generator slowly from 1kHz to 100Hz and back again and checkthat the transmitter keys between 700Hz ±70Hz and 250Hz ±25Hz.When going from receive to transmit the radio should key instantly at these cut-offs. When going from transmit to receive check there is a delay of approximately1.5 seconds.Check that VOX transmit is inhibited if the channel is busy (assuming LINK4B isfitted).5Switch on the MOX PTT and set the audio generator to 1kHz at a level of -50dBm(3mV).Monitor TP9 and check that the level on the scope is 1.2Vp-p ±0.2V.Increase the audio level by 10dB and check that the level on the scope is about thesame.Decrease audio level by 20dB. After observing the charging action of the compres-sor, the level on the scope should be 0.4Vp-p ±0.1V.Trunking only: The audio at TP9 should be there on an assigned channel, anon-trunked channel or in test mode. When the radio is on a control channel orhunting for a control channel, the audio should be muted.6A final system check can be done with the directional microphone and footswitch.Fn
123) + &The following table describes S21 pin-outs, and relevant interface signals on S13 and S14(T2000 logic PCB). S21 is the 9 way D-type connector mounted on the heatsink at therear of the radio.The following diagram shows the pin designations of S21, viewed from the rear of theradio.Pin No. Signal Description LevelS21-1 GNDS21-2 MIC Input for directional mic. audioS21-3 GNDS21-4 GNDS21-5 GNDS21-6 FT-SWTCH Requests handsfree transmit.S21-7 VOX Output signalling valid VOX opera-tion.S21-8 GNDS21-9 GNDS13-6 TX-LINE-IN Electret microphone audio switched in during handsfree transmit. 300mVp-p at 60% mod. 1kHzS13-7 RX-GTD-AF Used to provide VOX trunking inhibit for received speech. 110mVrms at 60% mod. 1kHzS13-11 OPTIONS-GND Provides the ground for the options circuitry.S14-1 +13.8V Powers the +8V regulator used to supply audio circuitry 10.8V to 16V DCavailable current 200mAS14-2 +5V Used to supply power for the logic circuitry. available current 150mAS14-3 BUSY Used to mute invalid audio when transmitter has been inhibited. carrier detect 0V = busyS14-5 /PTT-TO-OPT Echoed to S14-6 for normal PTT request. Switches off S13-6. 5V pull-up 0V = TxS14-6 /PTT-FRM-OPT Provides the signal for the radio to transmit. 5V CMOS 0V = TxS14-7 /IN-LOCK Used to inhibit VOX Tx requests when the radio is out of lock. synthesiser lock detect 0V = lock (lock-up time <20ms)S14-11 CALL-SW Used by trunking software to mute invalid audio. 5V CMOS 5V = mute
 123)* Current .. <30mAOperating Temperature Range .. -30 to +60°C ambientAudio:Input For 60% Deviation .. 1mVrms ± 0.1mV (1kHz, 600Ω)Microphone .. uni-directional electretMicrophone sensitivity .. -67dB ±3db (0dB = 1V/µbar)Distortion .. <5%Delay From Audio To PTT Request .. 20ms (typical)+ !7Audio is fed into the preamplifier circuitry (Q1) from the electret microphone via pin 2of the 9 way D-range (S21). The pre-amplified audio is then split and goes into thespeech bandpass filter and the noise filter.The speech bandpass filter consists of a 4th order 250Hz high pass filter (IC1) and a gainstage (IC1) with a 3kHz rolloff. Audio then goes into the compressor circuitry (IC1).When PTT is requested by the logic circuitry, IC2 switches and the audio is driven intothe TX-LINE-IN at a low impedance. After the high pass filter, audio is tapped off intothe speech VOX filter (IC4), which provides a low pass cutoff of 700Hz. This, combinedwith the previous high pass filter, gives the speech VOX filter cutoffs of 250Hz and700Hz.The second path of the audio after the preamplifier is to the noise filter (IC3). This con-sists of a 2nd order high pass filter below 100Hz.After the gain adjusting stages (IC3 & IC4) each filter goes into a precision rectifier (IC3& IC4), where their appropriate DC level is presented to a comparator (IC3 pins 12, 13 &14). The negative input has a potentiometer (RV67) providing a DC offset, which is usedto provide a minimum VOX threshold. This minimum threshold decreases with VOXactivity to provide some hysteresis. The negative input is also held high via IC2, pre-venting the comparator switching until the synthesiser lock detect line (IN/LOCK) islow. The positive input has a zener diode to prevent VOX activating when both inputsare in saturation.The switching circuitry after the comparator output has a slow decay provided by R69and C31. IC5 will only allow a VOX PTT request if the AUX line has been taken high.Two NAND gates in IC5 allow a handsfree PTT request (VOX or MOX) to proceedunless the PTT-IN line has been taken low. A valid handsfree PTT request will mute theordinary microphone and switch IC2, whereas a PTT-IN signal will be mirrored on thePTT line, without switching in the handsfree audio or muting the ordinary microphone.The CALL line is used by trunking software to mute the handsfree audio when theaudio path has been invalidly switched in (i.e. on a control channel). Similarly, the BUSYline is used to mute the audio if TX inhibit on busy is used.
123) -8&!!Optional circuitry is provided by IC7 to inhibit the VOX signal from the received audio,instead of BUSY. LINK4 is removed to disable the BUSY inhibit and the RX-AUDIOinhibit is enabled by changing LINK5A to LINK5B.Receiver gated audio is buffered by IC7 pins 12, 13 & 14 and split off to feed into theVOX noise path (IC3 pins 5, 6 & 7) and also to a precision rectifier formed around IC7,pins 1, 2 & 3. The rectified audio signal is compared by IC7 pins 5, 6 & 7, and operatesthe inhibit circuit, Q14.
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