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Motorola GM950E Service Manual Download Page 192

Frequency Synthesis

6.3-24

Theory of Operation

The balance attenuator is used to adjust the VCO’s deviation sensitivity to high frequency 
modulating signals. The output of the balance attenuator is present at the MODOUT port (U3701-
28) and connected to the VCO modulation diode D3731.

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Summary of Contents for GM950E

Page 1: ...Issue May 2000 GM950E GM950i Mobile Radio Service Manual 6804111J39 B h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 2: ...ii h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 3: ...s ANY DEVICES EMPLOYING METAL OXIDE SILICON MOS TECHNOLOGY ARE PARTICULARLY SUSCEPTIBLE CIRCUIT DIAGRAMS MARKED WITH THE ABOVE SYMBOL INDICATE ELECTRONIC CIRCUITS PECs FOR WHICH ESD HANDLING PRECAUTIONS ARE NECESSARY THE USER SHOULD REFER TO BS5783 1984 HANDLING OF ELECTROSTATIC SENSITIVE DEVICES THIS BRITISH STANDARD SUPERSEDES DEF STAN 59 98 ISSUE 2 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 4: ...Cautions and Warnings iv h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 5: ... ADEQUATE PRECAUTIONS TO PROTECT THEMSELVES COMPONENTS CONTAINING BERYLLIUM OXIDE ARE USED IN THIS EQUIPMENT DUST FROM THIS MATERIAL IS A HEALTH HAZARD IF INHALED OR ALLOWED TO COME INTO CONTACT WITH THE SKIN GREAT CARE MUST BE TAKEN WHEN HANDLING THESE COMPONENTS WHICH MUST NOT BE BROKEN OR SUBJECTED TO EXCESSIVE HEATING DEFECTIVE COMPONENTS MUST BE DISPOSED OF IN ACCORDANCE WITH CURRENT INSTRUCT...

Page 6: ...Cautions and Warnings vi h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 7: ...he radio using the front panel and diagnostics test modes 4 0 Theory Of Operation Gives a detailed description about the operation of the radio The information is supplied to circuit reference detail 5 0 Schematic Diagrams and Parts Lists Provides component location diagrams schematic diagrams and associated parts lists 6 0 216 246MHz Band Specific Information Provides all information concerning 2...

Page 8: ...Contents viii Service Manual h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 9: ... 1 2 0 Scope of Manual 1 3 0 How to Use This Manual 1 4 0 Warranty and Service Support 1 4 1 Waranty Period 1 4 2 After Warranty Period 1 4 3 Piece Parts 2 4 4 Technical Support 2 5 0 GM950E GM950i Technical SpeciÞcation 2 5 1 General 2 5 2 Transmitter 3 5 3 Receiver 3 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 10: ...Table of Contents 1 ii Introduction h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 11: ... Claim Form Warranty Claim Forms are obtained by contacting an Authorised Motorola Dealer 4 1 Waranty Period The terms and conditions of warranty are deÞned fully in the Motorola Dealer or Distributor or Reseller contract These conditions may change from time to time and the following notes are for guidance purposes only In instances where the product is covered under a return for replacement or r...

Page 12: ...65 4815560 Fax 65 4846123 4 4 Technical Support Motorola Product Services is available to assist the dealer distributors in resolving any malfunctions which may be encountered Initial contact should be by telephone whenever possible When contacting Motorola Technical Support be prepared with the product model number and the unitÕs serial number 5 0 GM950E GM950i Technical SpeciÞcation 5 1 General ...

Page 13: ...ansmit turn on time 25msec SPECIFICATION ITEM TYPICAL VALUE Channel Spacing 12 5 or 20 25 kHz Sensitivity 12 5 kHz 0 35uV 12dB SINAD Sensitivity 25 kHz 0 35uV 12dB SINAD Intermodulation 65dB ETS 70dB with Base Option Adjacent Channel Selectivity 60dB 12 5kHz 70dB 20 25kHz ETS Spurious Rejection 70dB ETS Audio Distortion Rated Audio 5 Hum and Noise CCITT 40dB 12 5kHz 45dB 20 25kHz CCITT Audio Respo...

Page 14: ...GM950E GM950i Technical SpeciÞcation 1 4 Introduction h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 15: ...hart and Accessories Table of Contents Table of Contents Paragraph Page 1 0 Overview 1 2 0 Model Chart 1 3 0 Accessories 2 3 1 Mechanical Hardware Kits 2 3 2 Microphones 2 3 3 Speakers 2 3 4 Cables 2 3 5 Other 2 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 16: ...Table of Contents 2 ii Model Chart and Accessories h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 17: ...AA2AA AZM08JFF4AA3AA AZM08RDE4AA2AA AZM08RFF4AA3AA Item Description X X X X X X X X X X X X PMBN4039_ Packaging Kit X X X X X X GCN6103_ Control Head Model A2 Non Display X X X X X X GCN6105_ Control Head Model A3 Display X X X X X X X X X X X X GLN7324_ Low ProÞle Trunnion Kit X X X X X X X X X X X X GMN6146_ Enhanced Compact Microphone X PMUE1619_ GM950E UHF 12 5kHz Tanapa X PMUE1621_ GM950E UHF...

Page 18: ...N3141 Handset low cost with Hang up cup HMN3000 Desk Microphone 3 3 Speakers All speaker connecting cables have 16 pin accessory connector plug GSN6059 13W External Speaker square 3 4 Cables GKN6270 Battery power cable 3m 10A fuse Standard GKN6271 Ignition switch cable 3 5 Other GKN6272 External Alarm Relay and Cable Kit GLN7323 External PTT GLN7318 Base Tray GPN6126 24 12V DC Converter 6A GPN6127...

Page 19: ...ntrol Head 3 3 2 Replace the Transceiver Board 3 3 3 Replace the Top Cover and Control Head 3 4 0 Exploded View Diagrams and Parts 4 5 0 Service Aids 6 6 0 Test Equipment 7 7 0 Radio Tuning Procedure 8 7 1 General 8 7 2 PA Bias Voltage 9 7 3 Battery Threshold 10 7 4 Transmitter Power 10 7 5 Reference Oscillator 11 7 6 Front End Pre Selector 11 7 7 Rated Volume 12 7 8 Squelch 12 7 9 Transmit Deviat...

Page 20: ...Table of Contents 3 ii Maintenance h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 21: ...ol Head Figure 3 1 Control Head Removal 1 Insert a small ßat blade screw driver or similar in the recess between the control head and the transceiver to minimise cosmetic damage to the radio cover start from the bottom side 2 Press until the side of the control head releases and then repeat the operation on the opposite side of the radio 3 Pull the control head away from the transceiver 4 Remove t...

Page 22: ...f the radio CAUTION The thermal grease can act as an adhesive and cause the leads of the heat dissipating devises to be over stressed if the board is lifted too quickly 2 4 Disassemble the Control Head 1 To pull out the printed circuit board from the control head housing insert a small blade screw driver in the side groove near the four protruding tabs Remove the board from the control head housin...

Page 23: ... the heatsinking pads in the chassis 2 Before installing the connector retaining clips ensure that the board is sitting ßush on the chassis mounting surface 3 Install the 13 screws with 0 4 07 NM 4 6 in lbs of torque using a T8 TORX driver 3 3 Replace the Top Cover and Control Head 1 Position the top cover over the chassis and replace Ensure that the cross snaps into the recesses 2 Connect the con...

Page 24: ...l Gasket Chassis 3202619Y01 Main PCB Flex 8402618Y01 Pad 7502618Y01 Gasket Controlhead 3202620Y01 Antenna Conn 0905901V06 incl Gasket 3205929V01 Chassis 2702608Y01 Shield 2602640Y01 Shield 2602639Y01 Accessory Conn 16Pin 2804503J01 Power Conn 0905902V01 Gasket 3205930V01 Clip 4205938V01 Connector 1580922V01 Gasket Accessory Conn 3202606Y01 Gasket Cover 3202607Y01 Screw M3x10 03S10911A12 h t t p w ...

Page 25: ...rcuit Board 8480573Z01 Speaker 5005156Z02 Keypad 7502614Y02 Gasket 3505932V01 Housing incl LCD Gasket 1502612Y03 LCD 7202662Y01 Keypad 7502615Y02 Printed Circuit Board 8480479Z01 Speaker 5005156Z02 and Gasket 3205932V01 Frame LCD 0702643Y01 Connector Elastromeric 2802638Y04 top 2802638Y03 bottom GEPD5493 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 26: ...s radio to power supply GTF180 Test Box Enables connection to the universal connector Allows switching for radio testing RLN4008 Radio Interface Box Enables communications between the radio and the com puterÕs serial communications adapter EPN4040 Power Supply Used to supply power to the RIB 240 VAC EPN4041 Power Supply Used to supply power to the RIB 220 VAC 3080369B72 Computer Interface Cable Co...

Page 27: ...Series System Analyser This monitor will substi tute for items with an asterisk Frequency deviation meter and sig nal generator for wide range trouble shooting and alignment R1150C Code Synthesizer Injection of audio and digital signal ling codes S1053D 220 VAC Voltmeter 1mV to 300V 10 Mohm HM 203 7 110 VAC Voltmeter SKN6008A Power Cable for Meter Input impedance Audio voltage measurements SKN6001...

Page 28: ...cedures are performed from the Service menu Before going into the Service menu the radio must Þrst be read using the File Read Radio menu if the radio has just been programmed with data loaded from disk or from a newly created codeplug then it must still be read so that the RSS will have the radioÕs actual tuning values All Service windows read and program the radio codeplug directly you do NOT ha...

Page 29: ...imilar to previous radios Refer to the RSS on line help for information on the tuning software Perform the following procedures in the sequence indicated Note All tuning procedures must be performed at a supply voltage of 13 2V unless otherwise stated The Modulation Analyser to measure the deviation should be set to frequency modulation with de emphasis switched off and all high pass Þlters switch...

Page 30: ...cedure be performed The advanced power setting technology employed in the GM950E GM950i makes use of two reference power level settings along with parameters describing the circuit behaviour To set the reference points requires tuning on two power level settings a high power level setting and a low power level setting 1 From the Service menu select Tx Alignment 2 Select RF Power to open the RF pow...

Page 31: ...d The softpot value sets the control voltage of the pre selector Its value needs to be set at 7 frequencies across the frequency range 1 Set the test box GTF180B meter selection switch to the ÒAudio PAÓ position and connect a SINAD meter to the ÒMETERÓ port 2 From the Service menu select Rx Alignment 3 Select Front End Filter to open the pre selector tuning window The window will indicate the rece...

Page 32: ...et the signal to noise ratio at which the squelch opens The squelch value needs to be set at 7 frequencies across the frequency range For 20 25kHz radios the radio stores separate tuning data for 20kHz and 25kHz channel spacing Therefore both sets of tuning data should be set independently 1 Set the test box GTF180B meter selection switch to the ÒAudio PAÓ position and connect a SINAD meter to the...

Page 33: ... and 25kHz channel spacing Therefore both sets of tuning data should be set independently 1 From the Service menu select Tx Alignment 2 Select Reference Deviation to open the reference deviation tuning window 3 Set the value to 7 and press Program to store the softpot value 4 From the Service menu select Tx Alignment 5 Select ÔDeviation LimitÕ to open the deviation limit tuning window This window ...

Page 34: ...red millivolts into the ÒAudio InÓ port 4 Connect an AC meter to the meter port to insure the proper input signal level 5 Select the Þrst test frequency shown in the window 6 Press Toggle PTT to key the radio The status bar will indicate that the radio is transmitting 7 Measure the transmitter deviation 8 Adjust the transmitter deviation using the appropriate softpot to the value shown in Table 3 ...

Page 35: ...al Interface SPI 4 2 9 SBEP Serial Interface 5 2 10 General Purpose Input Output 5 2 11 Normal Microprocessor Operation 5 2 12 Control Head Model A2 or A3 6 3 0 General 7 3 1 Audio Filter IC AFIC 7 3 2 Audio Ground 7 4 0 Transmit Audio Circuits 7 4 1 Mic Input Path 7 4 2 External Mic Path 8 4 3 PTT Sensing and TX Audio Processing 8 4 4 Option Board Audio GM950i only 9 5 0 Transmit Signalling Circu...

Page 36: ... 17 8 1 Front End Band Pass Filter Pre Amplifier 17 8 2 Mixer and Intermediate Frequency IF Section 17 8 3 IF IC U5201 18 9 0 Power AmpliÞer PA 5 25W 18 9 1 Power Controlled Stage 18 9 2 PA Stages 19 9 3 Directional Coupler 19 9 4 Antenna Switch 19 9 5 Harmonic Filter 20 9 6 Power Control 20 10 0 Frequency Synthesis 21 10 1 Reference Oscillator 21 10 2 Fractional N Synthesizer U7501 21 10 3 Voltag...

Page 37: ... Stages 26 12 3 Directional Coupler 26 12 4 Antenna Switch 26 12 5 Harmonic Filter 27 12 6 Power Control 27 13 0 Frequency Synthesis 28 13 1 Reference Oscillator 28 13 2 Fractional N Synthesizer U3701 28 13 3 Voltage Controlled Oscillator VCO 29 13 4 Synthesizer Operation 29 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 38: ...Table of Contents 4 iv Theory of Operation h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 39: ...ont of the radio The control head contains a speaker LED indicators a microphone connector buttons and dependant of radio type a display These provide the user with interface control over the various features of the radio In addition to the power cable and antenna cable an accessory cable can be attached to a connector on the rear of the radio The accessory cable provides the necessary connections...

Page 40: ...done by U0631 Input and output capacitors C0631 0632 and C0633 0635 are used to reduce high frequency noise and provide proper operation during battery transients This regulator provides a reset output pin 5 that goes to 0 volts if the regulator output goes out of regulation This is used to reset the controller to prevent improper operation Diode D0631 prevents discharge of C0632 by negative spike...

Page 41: ... on off circuitry can be enabled by the microprocessor through AFIC port GCB1 line B CONTROL the mechanical On Off button on the control head line ON OFF CONTROL or the ignition sense circuitry line IGNITION CONTROL If any of the 3 paths cause a low at the collector of Q0612 the electronic ON is engaged 2 4 Mechanical On Off This refers to the on off button located on the control head and which tu...

Page 42: ...s bus in that the timing clock signal CLK is sent while SPI data SPI TRANSMIT DATA or SPI RECEIVE DATA is sent Therefore whenever there is activity on either SPI TRANSMIT DATA or SPI RECEIVE DATA there should be a uniform signal on CLK The SPI TRANSMIT DATA is used to send serial from a µP to a device and SPI RECEIVE DATA is used to send data from a device to a µP The only device from which data c...

Page 43: ... to external options Lines GP1 4 are inputs GP2 is an output and GP3 5 6 are bidirectional The software and the hardware conÞguration of the radio model deÞne the function of each port Some ports are not connected on GM950E radio refer to appendix B GP1 can be used as external PTT input or others set by the RSS GP2 can be used as normal output Q0441 placed or external alarm output Q0442 placed The...

Page 44: ...rol Head versions A2 or A3 are available for user interface Both Control Heads contain the internal speaker the microphone connector several buttons to operate the radio and several indicator LEDs to inform the user about the radio status Additionally the Control Head model A3 uses a 3 digit 7 segment LCD display for the channel number The On Off button when pressed switches the voltage regulators...

Page 45: ...erates its own 2 5 V bias for its internal circuitry C0153 is the bypass for the AFICÕs audio ground dc bias Note that while there are AFIC VAG and BOARD VAG U0105 1 each of these are separate They do not connect together 4 0 Transmit Audio Circuits Refer to Figure 4 1 for reference for the following sections 4 1 Mic Input Path The radio supports 2 distinct microphone paths known as internal and e...

Page 46: ...connector if this input is programmed for PTT The MIC signal is routed to the AFIC U0103 through R0146 and R0145 4 channel radio or through op amp buffer U0106 2 and option board connector J0103 3 1 128 channel radio R0145 C0145 the ampliÞer inside the AFIC pins 9 10 and gain setting resistor R0147 pre emphasise the MIC audio signal After further limiting and Þltering the modulation signal emerges...

Page 47: ...on board processing the signal emerges at J0103 1 The source resistor of the option board output and C0145 the ampliÞer inside the AFIC U0103 9 10 and gain setting resistor R0147 pre emphasise the signal Inside the AFIC the signal follows a path identical to conventional transmit audio The modulation signal emerges from the AFIC at J0103 19 20 Both signals are weighted by resistors R0181 R0182 and...

Page 48: ...the radio receiver Þlters out any audio below 300Hz so these tones are never heard in the actual system Only one type of sub audible data can be generated by U0103 AFIC at any one time The process is as follows using the SPI BUS the µP programs the AFIC to set up the proper low speed data deviation and select the PL or DPL Þlters The µP then generates a square wave which strobes the AFIC PL DPL en...

Page 49: ... signals coming from the µP pins 58 59 and 62 The output signal of U0105 3 is routed to the AFIC U0103 13 through gate U0107 1 Inside the AFIC the signal enters the conventional transmitter audio path at the splatter Þlter input Gate U0107 1 controlled by µP port PC7 U0101 42 selects between data signal and FLAT TX AUDIO signal Microphone audio is muted during High Speed Data signalling h t t p w ...

Page 50: ...tivates the fast squelch indicator signal at IF IC pin 18 FAST SQ Both squelch indicator signals CSQ DET pin 15 and FAST SQ pin 18 are combined weighted by resistors R0111 R012 and fed to one of the microprocessor s ADCs U0101 15 for interpretation From the voltage weighted by the resistors the µP determines whether CSQ DET FAST SQ or both are active J0400 11 16 1 FLAT RX AUDIO EXTERNAL SPEAKER IN...

Page 51: ...ignal is then Þltered and goes through a limiter and exits the AFIC at PL DPL DECODER OUT U0103 27 At this point the signal will appear as a square wave version of the sub audible signal which the radio received The microprocessor U0101 64 will decode the signal directly to determine if it is the tone code which is currently active on that mode 6 3 Audio AmpliÞcation Speaker Speaker The output of ...

Page 52: ...alue of this output is 6 6Vp p 6 5 Filtered Audio The AFIC has an audio whose output at U0103 22 has been Þltered and de emphasized but has not gone through the digital volume attenuator From AFIC U0103 22 the signal is routed through gate U0107 2 and AC coupled to U0106 4 The gate controlled by AFIC port GCB4 U0103 2 selects between the Þltered audio signal from the AFIC or the unÞltered discrimi...

Page 53: ...input of centre slicer circuit U0105 2 The non inverting input of op amp U0105 2 is fed through resistor R0162 Capacitor C0164 sets a low pass corner frequency of 3 3kHz The inverting input of op amp U0105 2 is fed through resistor R0163 Capacitor C0163 sets a low pass corner frequency of 16Hz During operation R0163 C0163 establish an average DC offset level at U0105 2 pin 6 dependent on the avera...

Page 54: ... this case a code contained within the SPI BUS load to the AFIC sets up the path and determines the tone frequency and at what volume level to generate the tone It does not have to be related to the voice volume setting Inside the AFIC this signal is routed to the alert tone generator the output of the generator is summed into the audio chain just after the RX audio de emphasis block Inside U0103 ...

Page 55: ... The collector current of approximately 11 16 mA is drawn from the voltage 9V3 A second two pole varactor tuned bandpass Þlter provides additional Þltering to the ampliÞed signal The varactor diodes D5304 and D5305 are controlled by the same signal which controls the pre selector Þlter A following 3 dB pad R5310 R5314 R5316 stabilizes the output impedance and intermodulation performance If the UHF...

Page 56: ...vailable at accessory connector J0400 15 9 0 Power AmpliÞer PA 5 25W The radioÕs 5 25 W PA is a four stage ampliÞer used to amplify the output from the exciter to the radio transmit level It consists of four stages in the line up The Þrst Q5510 is a bipolar stage that is controlled via the PA control line It is followed by another bipolar stage Q5520 a MOS FET stage Q5530 and a Þnal bipolar stage ...

Page 57: ...ng network consisting of C5542 C5544 and two striplines transform the impedance to 50 Ohms and feed the directional coupler 9 3 Directional Coupler The directional coupler is a microstrip printed circuit which couples a small amount of the forward power off the RF power from Q5536 The coupled signal is rectiÞed to an output power proportional negative DC voltage by the diode D5553 and sent to the ...

Page 58: ...0101 54 sets BIAS VLTG U0731 4 and VLTG LIMIT SET U0731 13 in receive mode to low to switch off the bias of the MOS FET device Q5530 and to switch off the power control voltage PWR CNTL Through an Analog to Digital A D input VLTG LIMIT the microprocessor can read the PA control voltage PWR CNTL during the tuning process The ALC loop regulates power by adjusting the PA control line PWR CNTL to keep...

Page 59: ...polarity of the supply voltage 10 0 Frequency Synthesis The complete synthesizer subsystem consists of the Reference Oscillator U7502 the Fractional N synthesizer U7501 the Voltage Controlled Oscillator Q5741 Q5751 the RX and TX buffer stages Q5771 Q5781 and the feedback ampliÞer Q5791 10 1 Reference Oscillator The Reference Oscillator Y5702 contains a temperature compensated crystal oscillator wi...

Page 60: ... to the Common VCO Buffer Q5751 Q5751 draws a collector current of 13 mA from the stabilized 5V U5801 and drives the Pre scaler Buffer Q5791 the PA Buffer Q5781 Pout 13dBm and Mixer Buffer Q5771 Pout 10dBm Q5791 draws a collector current of 8 mA from the stabilized 5V and Q5771 Q5781 both draw 17mA form the 9V3 source The buffer stages Q5771 Q5781 and the feedback ampliÞer Q5791 provide the necess...

Page 61: ...certain software programmable time Adapt Mode The adapt mode timer is started by a low to high transient of the FRACN CE line When the synthesizer is within the lock range the current is determined only by the resistors connected to CPBIAS 1 CPBIAS 2 or the internal current source A settled synthesizer loop is indicated by a high level of signal LOCK DET U5701 2 This signal is routed to uP U0101 1...

Page 62: ...302 R3300 and R3311 R3313 In transmit mode the high K9V1 signal fed through diode D3300 switches off the current source and in turn the pre ampliÞer In receive mode K9V1 must be low to switch on the current source A 3 dB pad R3306 R3308 and R3316 R3318 stabilizes the output impedance and intermodulation performance A second two pole varactor tuned bandpass Þlter provides additional Þltering to the...

Page 63: ...connector J0400 15 12 0 Power AmpliÞer PA 5 25W The radioÕs 5 25 W PA is a three stage ampliÞer used to amplify the output from the exciter to the radio transmit level It consists of three stages in the line up The Þrst Q3511 is a bipolar stage that is controlled via the PA control line It is followed a MOS FET stage Q3521 and a Þnal bipolar stage Q3531 Devices Q3511 and Q3521 are surface mounted ...

Page 64: ...ectiÞed to an output power proportional negative DC voltage by the diode D3657 and sent to the power control circuit in the controller section via the line PWR DETECT for output power control The power control circuit holds this voltage constant thus ensuring the forward power out of the radio to be held to a constant value 12 4 Antenna Switch The antenna switch is switched synchronously with the ...

Page 65: ...C loop regulates power by adjusting the PA control line PWR CNTL to keep the forward power voltage PWR DETECT at a constant level Opamp U0701 2 and resistors R0701 to R0703 and R0731 subtract the negative PWR DETECT voltage from the PWR SET D A output U0731 pin 2 The result is connected to opamp inverting input U0701 4 pin 9 This voltage which is compared with a 4 6 volt reference VAG present at n...

Page 66: ...ated crystal oscillator with a frequency of 16 8 MHz An analog to digital A D converter internal to U3701 and controlled by the microprocessor via serial interface SRL sets the voltage at the warp output of U3701 pin 16 to set the frequency of the oscillator The output of the oscillator pin 2 of Y3702 is applied to pin 14 XTAL1 of U3701 via a RC series combination In applications were less frequen...

Page 67: ...e modulation signal coming from the FRAC N synthesizer IC U3701 pin 28 modulates the TX VCO via varactor diode D3731 Both oscillator outputs are combined and buffered by the VCO Buffer Q3760 Q3760 draws a collector current of 13 mA from the stabilized 5V U3801 and drives the Mixer Buffer Q3770 Q3770 draws a collector current of 17 mA from the 9V3 voltage and drives the PA Buffer Q3780 Pout 13dBm a...

Page 68: ... for a certain software programmable time Adapt Mode The adapt mode timer is started by a low to high transient of the FRACN CE line When the synthesizer is within the lock range the current is determined only by the resistors connected to CPBIAS 1 or the internal current source A settled synthesizer loop is indicated by a high level of signal LOCK DET U3701 2 This signal is routed to µP U0101 17 ...

Page 69: ...Schematic Diagram 1 of 2 13 Main Board UHF GM950E Controller Schematic Diagram 2 of 2 15 Parts List 17 Main Board UHF Supply Voltage Schematic Diagram 21 Parts List 23 Main Board UHF Power Control Schematic Diagram 25 Parts List 27 Main Board UHF Power AmpliÞer 5 25W Schematic Diagram 29 Parts List 31 Main Board UHF Synthesizer Schematic Diagram 33 Parts List 35 Main Board UHF Voltage Controlled O...

Page 70: ...hematic Diagram 69 Parts List 71 Main Board VHF Power Control Schematic Diagram 73 Parts List 75 Main Board VHF Power AmpliÞer 5 25W Schematic Diagram 77 Parts List 79 Main Board VHF Synthesizer Schematic Diagram 81 Parts List 83 Main Board VHF Voltage Controlled Oscillator Schematic Diagram 85 Parts List 87 Main Board VHF RX FE Schematic Diagram 89 Parts List 91 Main Board VHF RX IF Schematic Dia...

Page 71: ... D5301 D5302 D5303 D5304 D5305 D5401 D5551 D5631 D5702 D5731 D5741 D5742 D5743 D5751 E5301 E5702 E5732 FL5201 FL5202 J0101 J0400 J5501 J5601 L0114 L0401 L0402 L5201 L5211 L5302 L5401 L5402 L5403 L5404 L5501 L5503 L5541 L5542 L5551 L5552 L5553 L5554 L5600 L5611 L5631 L5731 L5741 L5742 L5743 L5744 L5754 L5781 Q0114 Q0137 Q0138 Q0161 Q0401 Q0421 Q0431 Q0601 Q0731 Q0741 Q0742 Q5301 Q5510 Q5520 Q5621 Q...

Page 72: ...2 L5533 L5534 L5601 L5771 Q0411 Q0412 Q0432 Q0433 Q0441 Q0442 Q0461 Q0462 Q0471 Q0611 Q0612 Q0711 Q5201 Q5302 Q5530 Q5540 Q5611 Q5612 Q5771 Q5791 R0100 R0111 R0112 R0117 R0118 R0139 R0147 R0148 R0149 R0150 R0157 R0173 R0175 R0181 R0182 R0411 R0412 R0413 R0414 R0415 R0435 R0436 R0437 R0438 R0439 R0441 R0442 R0443 R0444 R0450 R0451 R0455 R0456 R0461 R0462 R0463 R0464 R0465 R0471 R0472 R0473 R0474 R0...

Page 73: ...R Y X C0151 470pF NU C0146 56pF J0103 4 4 FAST_SQ R0153 NU 4 7K LOCK_DET_5 1uF C0184 0 1uF C0182 0 1uF C0181 2_1MHZ_5 NU R0188 0 0 1uF C0154 TP0105 C0174 470K R0148 R0155 68K 0 1uF 1 2 3 D0101 R0171 K9V1_ENABLE_5 R0145 30K 47 5K C0173 12 13 11 1uF 74AC08 U0104 4 C0191 C0176 3 3uF 0 1uF C0175 SQ_ATT_IN_5 74AC08 4 5 6 001uF R0116 270 U0104 2 C0115 6 22pF R0102 J0103 6 R0162 10K 4 7K 33uH L0114 R0163...

Page 74: ... NU R0402 1K R0401 4 7K 47K 470pF C0471 R0431 270 R0476 R0473 68K NU 470pF C0462 470pF C0472 D0471 NU XX XX XX 10K NU 47K R0477 Q0432 47K 22K R0406 4 7K R0423 VR0454 NU 470pF 14V C0412 0 R0439 0 NU R0427 0 VR0471 33V 47K 4 7K R0426 R0475 Q0471 47K 47K R0415 0 NU R0462 4 7K Q0462 01uF C0463 470pF C0414 47K R0474 R0436 47K 001uF C0419 Q0461 47K 47K R0464 10K R0438 10K 4 7K C0446 470pF R0437 R0414 27...

Page 75: ...1049J26 TANT CP 10uF 20 16V C0142 2113743A19 100nF 16V C0145 2113741F25 1nF 50V C0148 2113741F17 470pF 50V C0149 2113740F39 33pF 5 50V C0150 2311049A05 TANT CP 470nF 10 25V C0151 2113741F17 470pF 50V C0152 2311049A07 TANT CP 1uF 10 16V C0153 2113743K15 100nF 16V C0154 2113743K15 100nF 16V C0155 2113740F39 33pF 5 50V C0157 2113741F17 470pF 50V C0161 2113743K15 100nF 16V C0162 2113743K15 100nF 16V C...

Page 76: ...t No Description C0472 2113741F17 470pF 50V D0101 4813833C02 DIODE DUAL SOT MMBD6100 J0101 0902636Y01 Connector Flex Side Entry J0102 0904424J06 Connector double row 8pin J0103 0904424J06 Connector double row 8pin J0400 2804503J01 Accessory Connector 16 L0114 2460578C43 INDUCTOR CHIP 33 0UH L0170 2462587K26 CHIP IND 33000 NH L0194 2462587Q40 COIL CHIP 270nH L0195 2462587Q40 COIL CHIP 270nH L0401 2...

Page 77: ...7A49 1k 1 16W 5 R0143 0662057A89 47k 1 16W 5 R0144 0662057A89 47k 1 16W 5 Circuit Ref Motorola Part No Description R0145 0662057A84 30k 1 16W 5 R0147 0662057B04 180k 1 16W 5 R0148 0662057B14 470k 1 16W 5 R0149 0662057B47 0 1 16W R0150 0662057A90 51k 1 16W 5 R0151 0662057A73 10k 1 16W 5 R0152 0662057A73 10k 1 16W 5 R0154 0662057A73 10k 1 16W 5 R0155 0662057A93 68k 1 16W 5 R0156 0662057B47 0 1 16W R...

Page 78: ...1 16W R0474 0662057A89 47k 1 16W 5 R0475 0662057A65 4k7 1 16W 5 R0476 0662057C61 270 1 16W 5 U0101 5102898X66 PROC350 PLAT S W R010000 A3 Circuit Ref Motorola Part No Description U0102 5113805A30 IC 10F8 DCDR REMUX 74HC138 U0103 5102227J35 CHIP CAR TEST 27J35 U0104 5105492X36 74AC08 4 AND GATES U0105 5183222M49 IC QUAD OPAMP_3403_ U0106 5183222M49 IC QUAD OPAMP_3403_ U0107 5184704M60 IC MUX DEMUX ...

Page 79: ... 8 Y0114 INSTPAR Y X C0151 470pF NU C0146 56pF J0103 4 4 FAST_SQ R0153 NU 4 7K LOCK_DET_5 1uF C0184 0 1uF C0182 0 1uF C0181 2_1MHZ_5 NU R0188 0 0 1uF C0154 TP0105 C0174 470K R0148 R0155 68K 0 1uF 1 2 3 D0101 R0171 K9V1_ENABLE_5 R0145 30K 47 5K C0173 12 13 11 1uF 74AC08 U0104 4 C0191 C0176 3 3uF 0 1uF C0175 SQ_ATT_IN_5 74AC08 4 5 6 001uF R0116 270 U0104 2 C0115 6 22pF R0102 J0103 6 R0162 10K 4 7K 3...

Page 80: ...XX XX 10K NU 47K R0477 Q0432 47K 22K R0406 4 7K R0423 VR0454 NU 470pF 14V C0412 0 R0439 NU R0427 0 VR0471 33V 47K 4 7K R0426 R0475 Q0471 47K 47K R0415 0 NU R0462 4 7K Q0462 01uF C0463 470pF C0414 47K R0474 R0436 47K 001uF C0419 Q0461 47K 47K R0464 10K R0438 10K 4 7K C0446 470pF R0437 R0414 270 4 7K R0412 R0411 14V 10K C0411 01uF VR0411 VR0445 14V Q0411 C0431 8 NINV 1 OUT1 4 OUT2 6 3 RR 7 VCC 470pF...

Page 81: ...V C0141 2311049J26 TANT CP 10uF 20 16V C0145 2113741F25 1nF 50V C0148 2113741F17 470pF 50V C0149 2113740F39 33pF 5 50V C0150 2311049A05 TANT CP 470nF 10 25V C0151 2113741F17 470pF 50V C0152 2311049A07 TANT CP 1uF 10 16V C0153 2113743K15 100nF 16V C0154 2113743K15 100nF 16V C0155 2113740F39 33pF 5 50V C0157 2113741F17 470pF 50V C0161 2113743K15 100nF 16V C0162 2113743K15 100nF 16V C0163 2113743K15 ...

Page 82: ...0102 0662057A65 4k7 1 16W 5 R0103 0662057A73 10k 1 16W 5 R0104 0662057A85 33k 1 16W 5 R0105 0662057A73 10k 1 16W 5 Circuit Ref Motorola Part No Description R0106 0662057A57 2k2 1 16W 5 R0107 0662057A25 100 1 16W 5 R0108 0662057A89 47k 1 16W 5 R0109 0662057A89 47k 1 16W 5 R0110 0662057A73 10k 1 16W 5 R0111 0662057A85 33k 1 16W 5 R0112 0662057A93 68k 1 16W 5 R0113 0662057A73 10k 1 16W 5 R0114 066205...

Page 83: ...2057A89 47k 1 16W 5 R0415 0662057B47 0 1 16W 5 R0421 0662057B47 0 1 16W not used R0422 0662057A73 10k 1 16W 5 R0425 0662057A73 10k 1 16W 5 Circuit Ref Motorola Part No Description R0426 0662057A89 47k 1 16W 5 R0427 0662057B47 0 1 16W R0431 0662057A89 47k 1 16W 5 R0432 0662057A65 4k7 1 16W 5 R0436 0662057A89 47k 1 16W 5 R0439 0662057B47 0 1 16W R0444 0662057C61 270 1 16W 5 R0454 0662057A49 1k 1 16W...

Page 84: ...UHF GM950E Main Board Controller 5 20 Schematic Diagrams and Parts Lists h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 85: ... 10 470pF C0613 470pF 3 3K R0617 3 3K R0604 6 8K 1K Q0601 R0601 10K C0611 3 3K R0613 47uF 3 3K 3 3K 3 3K 10K 10K R0615 R0612 GND 3 ON_OFF 2 VIN 4 VOUT 5 FLT_A _8 LM2941T LM2941T U0601 ADJ 1 0 0 R0606 0 1uF C0612 1K R0614 10K 10K R0616 1 2K R0611 Q0612 R0621 VR0621 C0621 C0622 D0621 2 1 3 U0631 8 7 3 4 GND 1 5 2 6 C0633 C0635 C0634 INPUT FEEDBACK SHUTDOWN OUTPUT ERROR SENSE 5V_TP R0641 R0642 C0641 ...

Page 86: ...621 4813833C02 DUAL SOT MMBD6100 D0631 4813833C02 DUAL SOT MMBD6100 Q0601 4880214G02 NPN 40V Q0611 4805128M27 PNP SOT89 Q0612 4880214G02 NPN 40V R0601 0662057A73 10k 1 16W 5 R0602 0660076E70 FILM 7500 R0603 0660076E51 FILM 1200 R0604 0662057A49 1k 1 16W 5 R0605 0662057A69 6k8 1 16W 5 R0606 0662057B47 0 1 16W R0611 0662057A51 1k2 1 16W 5 R0612 0662057C87 3300 5 1 8 R0613 0662057C87 3300 5 1 8 R0614...

Page 87: ...UHF Main Board Supply Voltage 5 24 Schematic Diagrams and Parts Lists h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 88: ..._OUT 15 EN 6 8 NC 9 NC1 Q1 2 Q2 4 Q3 11 Q4 13 MC144111 U0731 CLK 10 D_IN 1 R0719 68K VLTG_LIMIT_7 68K 33K R0717 R0718 22K R0715 560K R0716 100uF C0714 3300pF C0716 PWR_CNTL_7 100pF C0713 R0734 330 R0712 47 5K 0 R0735 220uF C0733 U0701 5 PWR_GND 11 GND 4 VCC PA_TEMP MC3403 U0701 4 9 10 8 1 MC3403 U0701 3 13 12 14 7 U0701 1 MC3403 2 3 U0701 2 MC3403 6 5 SW_B _7 4 7K 22K R0731 R0732 C0711 39000pF R07...

Page 89: ...741 4880048M01 TSTR NPN DIG 47k 47k Q0742 4805128M27 TSTR PNP SOT89 BSR33 R0701 0662057A93 68k 1 16W 5 R0702 0662057A89 47k 1 16W 5 R0703 0662057A73 10k 1 16W 5 R0704 0662057A93 68k 1 16W 5 R0711 0662057A81 22k 1 16W 5 R0712 0662057A37 330 1 16W 5 R0713 0662057A61 3k3 1 16W 5 R0714 0662057A81 22k 1 16W 5 R0715 0662057A81 22k 1 16W 5 R0716 0662057B16 560k 1 16W 5 R0717 0662057A85 33k 1 16W 5 R0718 ...

Page 90: ...5 28 Schematic Diagrams and Parts Lists h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 91: ...556 R5512 10 001uF 6 8pF L5553 18nH R5624 C5554 4 7 K9V1 L5600 51 R5617 10 R5614 4 7 R5527 L5541 18nH R5525 4 7 D5551 NU 01uF C5613 20pF C5513 1K A R5522 18nH L5551 7 66nH L5501 C5512 18pF 100pF C5547 C5541 36pF L5601 NU 4 7pF C5511 L5552 C5542 36pF 18nH C5543 27pF 10 L5532 R5531 PART OF HARDWARE KIT Q5530 MRF5015 68 R5502 EXCITER_PA PWR_DETECT PA_RX 1K R5521 D5601 47K NU R5523 PWR_CNTL 001uF C563...

Page 92: ...111078B09 HQ 6 8pF 5 C5555 2111078B48 HQ 160pF 5 C5556 2113741F25 1nF 50V C5558 2113740F20 5 1pF 5 50V C5559 2113741F25 1nF 50V C5600 2113740A67 330pF 5 50V C5602 2113740F51 100pF 5 50V C5603 2113741F25 1nF 50V C5604 2311049A45 TANT CP 10uF 10 35V C5611 2113741F49 10nF 50V C5612 2113741F49 10nF 50V C5615 2113741F25 1nF 50V C5616 2113740A67 330pF 5 50V C5617 2113740A67 330pF 5 50V C5618 2311049A01 ...

Page 93: ...R5512 0662057A01 10 1 16W 5 R5513 0662057A57 2k2 1 16W 5 R5521 0662057A49 1k 1 16W 5 R5522 0662057A49 1k 1 16W 5 R5523 0662057A89 47k 1 16W 5 R5525 0662057C19 4R7 1 10W 5 R5526 0662057C19 4R7 1 10W 5 R5527 0662057C19 4R7 1 10W 5 R5531 0680194M01 10 1W 5 R5541 0680194M01 10 1W 5 R5550 0662057A73 10k 1 16W 5 R5551 0662057A73 10k 1 16W 5 R5552 0662057A18 51 1 16W 5 R5553 0683962T51 120 1W 5 Circuit R...

Page 94: ...UHF Synthesizer Schematic Diagram Schematic Diagrams and Parts Lists UHF Synthesizer Schematic Diagram Not Used 5 33 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 95: ...C5723 2109720D14 CER LOW DIST 100nF C5725 2109720D14 CER LOW DIST 100nF C5726 2113741F49 10nF 50V C5727 0811051A19 MTLZ POLY 1uF 5 D5701 4802233J09 DIODE TRIPLE SOT143 RH E5701 2605915V01 SHLD PCB MOUNT 1 R5700 0662057B47 0 1 16W 5 R5701 0662057C61 270 1 16W 5 R5702 0662057C61 270 1 16W 5 R5703 0662057A49 1k 1 16W 5 R5705 0662057A89 47k 1 16W 5 R5708 0662057A01 10 1 16W 5 R5710 0662057B47 0 1 16W ...

Page 96: ...UHF Main Board Synthesizer 5 36 Schematic Diagrams and Parts Lists h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 97: ...UHF Voltage Controlled Oscillator Schematic Diagram Schematic Diagrams and Parts Lists UHF Voltage Controlled Oscillator Schematic Diagram 5 37 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 98: ...330pF 50V C5773 2113740F19 4 7pF 5 50V C5774 2113741F49 10nF 50V C5781 2113740F51 100pF 5 50V C5782 2113740F45 56pF 5 50V C5783 2113740F21 5 6pF 5 50V C5784 2113740F35 22pF 5 50V C5785 2113741F49 10nF 50V C5786 2113740F18 4 3pF 5 C5787 2113741F49 10nF 50V C5791 2113740F51 100pF 5 50V C5792 2113741F25 1nF 50V C5801 2113743A23 220nF 16V C5802 2113743E07 22nF 16V C5803 2311049A63 TANT CP 10uF 10 10V ...

Page 99: ...662057A61 3k3 1 16W 5 R5772 0662057A61 3k3 1 16W 5 R5773 0662057A73 10k 1 16W 5 R5774 0662057A73 10k 1 16W 5 R5775 0662057A25 100 1 16W 5 R5776 0662057A29 150 1 16W 5 R5777 0662057A13 33 1 16W 5 R5778 0662057A29 150 1 16W 5 R5779 0662057A01 10 1 16W 5 R5782 0662057A13 33 1 16W 5 R5783 0662057A29 150 1 16W R5784 0662057A73 10k 1 16W R5785 0662057A73 10k 1 16W R5786 0662057A25 100 1 16W R5787 066205...

Page 100: ...E5202 VCO_MIXER_2 5V_STAB_2_IN NU RX_IF_2 9V3_2 FE_CNTL_VLTG_2 3 PA_RX_2 3 L5409 3 L5408 4 5 L5407 T5402 1 2 3 D5301 C5324 36pF 1 8pF C5302 43pF C5305 5V_STA C5304 43pF 470 NU R5316 VCO_MIXER R5304 3 9K 1 8pF C5329 TP5301 R5315 10 6 2pF C5401 16pF C5402 15nH L5404 L5401 D5401 470nH C5318 51 R5401 10pF E5301 10 R5310 100K NU 16pF C5403 R5309 5 T5401 1 2 3 4 27nH L5403 270 R5314 C5325 3 9pF 82pF C54...

Page 101: ... 2113740F09 1 8pF 5 50V C5328 2113740F09 1 8pF 5 50V C5329 2113740F09 1 8pF 5 50V C5331 2113741F13 330pF 50V C5401 2113740F22 6 2pF 5 50V C5402 2113740F32 16pF 5 50V C5403 2113740F32 16pF 5 50V C5404 2113740F49 82pF 5 50V D5301 4862824C01 VARACTOR CHIP D5302 4862824C01 VARACTOR CHIP D5303 4880154K03 DUAL SCHOTTKY SOT23 D5304 4862824C01 DIODE VARACTOR D5305 4862824C01 DIODE VARACTOR D5401 4880174R0...

Page 102: ...317 0662057A29 150 1 16W 5 R5318 0662057A29 150 1 16W 5 R5319 0662057A13 33 1 16W 5 R5401 0662057A18 51 1 16W 5 T5401 2505515V03 XFMR JEDI MIXER SMD 4 1 T5402 2505515V04 XMFR MIXER 5 1 Circuit Ref Motorola Part No Description h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 103: ...UHF RX IF Schematic Diagram Schematic Diagrams and Parts Lists UHF RX IF Schematic Diagram 5 45 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 104: ...3740F51 100pF 5 50V C5234 2113743K15 100nF 16V C5235 2113740F51 100pF 5 50V C5236 2113740F51 100pF 5 50V C5237 2113743K15 100nF 16V C5238 2113743K15 100nF 16V Y5V C5239 2113740F44 51pF 5 50V D5201 4880154K03 Dual Schottky SOT23 FL5201 9180098D04 9180098D06 Filter CER 4 EL 455kHz 12 5kHz Filter CER 3WR 20 25kHz FL5202 9180097D04 9180097D06 Filter CER 6 EL 455kHz 12 5kHz Filter CER 6 EL 20 25kHz L52...

Page 105: ...5kHz U5201 5180207R01 IF IC Y5201 9102651Y01 9102652Y01 XTAL FLTR 45 1MHZ 12 5KHz 80dB XTAL FLTR 45 1MHZ 20 25KHz 80dB Y5202 9102651Y02 9102652Y02 XTAL FLTR 45 1MHZ 12 5KHz 60dB XTAL FLTR 45 1MHZ 20 25KHz 80dB Y5211 4802653Y01 XTAL OSC 44 645MHZ Circuit Ref Motorola Part No Description h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 106: ...51 L3552 L3621 L3622 L3631 L3641 L3651 L3652 L3731 L3732 L3733 L3734 L3741 L3750 L3751 L3752 L3754 L3761 L5201 L5211 Q0114 Q0137 Q0138 Q0161 Q0401 Q0421 Q0431 Q0601 Q0731 Q0741 Q0742 Q3301 Q3511 Q3641 Q3642 Q3643 Q3742 Q3751 Q3752 Q3760 R0101 R0102 R0103 R0104 R0105 R0106 R0107 R0108 R0109 R0110 R0113 R0114 R0115 R0116 R0119 R0120 R0121 R0122 R0123 R0124 R0125 R0126 R0127 R0128 R0130 R0131 R0134 R...

Page 107: ... J0103 L0170 L0194 L0195 L3521 L3522 L3601 L3742 L3768 L3773 L3781 L3783 L5202 L5203 Q0411 Q0412 Q0432 Q0433 Q0441 Q0442 Q0461 Q0462 Q0471 Q0611 Q0612 Q0711 Q3302 Q3521 Q3531 Q3770 Q3780 Q3790 Q5201 R0100 R0111 R0112 R0117 R0118 R0139 R0147 R0148 R0149 R0150 R0157 R0173 R0175 R0181 R0182 R0411 R0412 R0413 R0414 R0415 R0435 R0436 R0437 R0438 R0439 R0441 R0442 R0443 R0444 R0450 R0451 R0455 R0456 R04...

Page 108: ...R Y X C0151 470pF NU C0146 56pF J0103 4 4 FAST_SQ R0153 NU 4 7K LOCK_DET_5 1uF C0184 0 1uF C0182 0 1uF C0181 2_1MHZ_5 NU R0188 0 0 1uF C0154 TP0105 C0174 470K R0148 R0155 68K 0 1uF 1 2 3 D0101 R0171 K9V1_ENABLE_5 R0145 30K 47 5K C0173 12 13 11 1uF 74AC08 U0104 4 C0191 C0176 3 3uF 0 1uF C0175 SQ_ATT_IN_5 74AC08 4 5 6 001uF R0116 270 U0104 2 C0115 6 22pF R0102 J0103 6 R0162 10K 4 7K 33uH L0114 R0163...

Page 109: ...NU R0402 1K R0401 4 7K 47K 470pF C0471 R0431 270 R0476 R0473 68K NU 470pF C0462 470pF C0472 D0471 NU XX XX XX 10K NU 47K R0477 Q0432 47K 22K R0406 4 7K R0423 VR0454 NU 470pF 14V C0412 0 R0439 0 NU R0427 0 VR0471 33V 47K 4 7K R0426 R0475 Q0471 47K 47K R0415 0 NU R0462 4 7K Q0462 01uF C0463 470pF C0414 47K R0474 R0436 47K 001uF C0419 Q0461 47K 47K R0464 10K R0438 10K 4 7K C0446 470pF R0437 R0414 270...

Page 110: ...11049J26 TANT CP 10uF 20 16V C0142 2113743A19 100nF 16V C0145 2113741F25 1nF 50V C0148 2113741F17 470pF 50V C0149 2113740F39 33pF 5 50V C0150 2311049A05 TANT CP 470nF 10 25V C0151 2113741F17 470pF 50V C0152 2311049A07 TANT CP 1uF 10 16V C0153 2113743K15 100nF 16V C0154 2113743K15 100nF 16V C0155 2113740F39 33pF 5 50V C0157 2113741F17 470pF 50V C0161 2113743K15 100nF 16V C0162 2113743K15 100nF 16V ...

Page 111: ...t No Description C0472 2113741F17 470pF 50V D0101 4813833C02 DIODE DUAL SOT MMBD6100 J0101 0902636Y01 Connector Flex Side Entry J0102 0904424J06 Connector double row 8pin J0103 0904424J06 Connector double row 8pin J0400 2804503J01 Accessory Connector 16 L0114 2460578C43 INDUCTOR CHIP 33 0UH L0170 2462587K26 CHIP IND 33000 NH L0194 2462587Q40 COIL CHIP 270nH L0195 2462587Q40 COIL CHIP 270nH L0401 2...

Page 112: ...7A49 1k 1 16W 5 R0143 0662057A89 47k 1 16W 5 R0144 0662057A89 47k 1 16W 5 Circuit Ref Motorola Part No Description R0145 0662057A84 30k 1 16W 5 R0147 0662057B04 180k 1 16W 5 R0148 0662057B14 470k 1 16W 5 R0149 0662057B47 0 1 16W R0150 0662057A90 51k 1 16W 5 R0151 0662057A73 10k 1 16W 5 R0152 0662057A73 10k 1 16W 5 R0154 0662057A73 10k 1 16W 5 R0155 0662057A93 68k 1 16W 5 R0156 0662057B47 0 1 16W R...

Page 113: ...1 16W R0474 0662057A89 47k 1 16W 5 R0475 0662057A65 4k7 1 16W 5 R0476 0662057C61 270 1 16W 5 U0101 5102898X66 PROC350 PLAT S W R010000 A3 Circuit Ref Motorola Part No Description U0102 5113805A30 IC 10F8 DCDR REMUX 74HC138 U0103 5102227J35 CHIP CAR TEST 27J35 U0104 5105492X36 74AC08 4 AND GATES U0105 5183222M49 IC QUAD OPAMP_3403_ U0106 5183222M49 IC QUAD OPAMP_3403_ U0107 5184704M60 IC MUX DEMUX ...

Page 114: ... 8 Y0114 INSTPAR Y X C0151 470pF NU C0146 56pF J0103 4 4 FAST_SQ R0153 NU 4 7K LOCK_DET_5 1uF C0184 0 1uF C0182 0 1uF C0181 2_1MHZ_5 NU R0188 0 0 1uF C0154 TP0105 C0174 470K R0148 R0155 68K 0 1uF 1 2 3 D0101 R0171 K9V1_ENABLE_5 R0145 30K 47 5K C0173 12 13 11 1uF 74AC08 U0104 4 C0191 C0176 3 3uF 0 1uF C0175 SQ_ATT_IN_5 74AC08 4 5 6 001uF R0116 270 U0104 2 C0115 6 22pF R0102 J0103 6 R0162 10K 4 7K 3...

Page 115: ...XX XX 10K NU 47K R0477 Q0432 47K 22K R0406 4 7K R0423 VR0454 NU 470pF 14V C0412 0 R0439 NU R0427 0 VR0471 33V 47K 4 7K R0426 R0475 Q0471 47K 47K R0415 0 NU R0462 4 7K Q0462 01uF C0463 470pF C0414 47K R0474 R0436 47K 001uF C0419 Q0461 47K 47K R0464 10K R0438 10K 4 7K C0446 470pF R0437 R0414 270 4 7K R0412 R0411 14V 10K C0411 01uF VR0411 VR0445 14V Q0411 C0431 8 NINV 1 OUT1 4 OUT2 6 3 RR 7 VCC 470pF...

Page 116: ...V C0141 2311049J26 TANT CP 10uF 20 16V C0145 2113741F25 1nF 50V C0148 2113741F17 470pF 50V C0149 2113740F39 33pF 5 50V C0150 2311049A05 TANT CP 470nF 10 25V C0151 2113741F17 470pF 50V C0152 2311049A07 TANT CP 1uF 10 16V C0153 2113743K15 100nF 16V C0154 2113743K15 100nF 16V C0155 2113740F39 33pF 5 50V C0157 2113741F17 470pF 50V C0161 2113743K15 100nF 16V C0162 2113743K15 100nF 16V C0163 2113743K15 ...

Page 117: ...0102 0662057A65 4k7 1 16W 5 R0103 0662057A73 10k 1 16W 5 R0104 0662057A85 33k 1 16W 5 R0105 0662057A73 10k 1 16W 5 Circuit Ref Motorola Part No Description R0106 0662057A57 2k2 1 16W 5 R0107 0662057A25 100 1 16W 5 R0108 0662057A89 47k 1 16W 5 R0109 0662057A89 47k 1 16W 5 R0110 0662057A73 10k 1 16W 5 R0111 0662057A85 33k 1 16W 5 R0112 0662057A93 68k 1 16W 5 R0113 0662057A73 10k 1 16W 5 R0114 066205...

Page 118: ...2057A89 47k 1 16W 5 R0415 0662057B47 0 1 16W 5 R0421 0662057B47 0 1 16W not used R0422 0662057A73 10k 1 16W 5 R0425 0662057A73 10k 1 16W 5 Circuit Ref Motorola Part No Description R0426 0662057A89 47k 1 16W 5 R0427 0662057B47 0 1 16W R0431 0662057A89 47k 1 16W 5 R0432 0662057A65 4k7 1 16W 5 R0436 0662057A89 47k 1 16W 5 R0439 0662057B47 0 1 16W R0444 0662057C61 270 1 16W 5 R0454 0662057A49 1k 1 16W...

Page 119: ...VHF GM950E Main Board Controller 5 68 Schematic Diagrams and Parts Lists h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 120: ... 10 470pF C0613 470pF 3 3K R0617 3 3K R0604 6 8K 1K Q0601 R0601 10K C0611 3 3K R0613 47uF 3 3K 3 3K 3 3K 10K 10K R0615 R0612 GND 3 ON_OFF 2 VIN 4 VOUT 5 FLT_A _8 LM2941T LM2941T U0601 ADJ 1 0 0 R0606 0 1uF C0612 1K R0614 10K 10K R0616 1 2K R0611 Q0612 R0621 VR0621 C0621 C0622 D0621 2 1 3 U0631 8 7 3 4 GND 1 5 2 6 C0633 C0635 C0634 INPUT FEEDBACK SHUTDOWN OUTPUT ERROR SENSE 5V_TP R0641 R0642 C0641 ...

Page 121: ...621 4813833C02 DUAL SOT MMBD6100 D0631 4813833C02 DUAL SOT MMBD6100 Q0601 4880214G02 NPN 40V Q0611 4805128M27 PNP SOT89 Q0612 4880214G02 NPN 40V R0601 0662057A73 10k 1 16W 5 R0602 0660076E70 FILM 7500 R0603 0660076E51 FILM 1200 R0604 0662057A49 1k 1 16W 5 R0605 0662057A69 6k8 1 16W 5 R0606 0662057B47 0 1 16W R0611 0662057A51 1k2 1 16W 5 R0612 0662057C87 3300 5 1 8 R0613 0662057C87 3300 5 1 8 R0614...

Page 122: ...VHF Main Board Supply Voltage 5 72 Schematic Diagrams and Parts Lists h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 123: ...VHF Power Control Schematic Diagram Schematic Diagrams and Parts Lists VHF Power Control Schematic Diagram 5 73 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 124: ...80048M01 NPN DIG 47k 47k Q0742 4805128M27 PNP SOT89 R0701 0662057A97 100k 1 16W R0702 0662057A97 100k 1 16W R0703 0662057A61 3k3 1 16W 5 R0704 0662057A93 68k 1 16W 5 R0711 0662057A81 22k 1 16W 5 R0712 0662057A37 330 1 16W 5 R0713 0662057A61 3k3 1 16W 5 R0714 0662057A81 22k 1 16W 5 R0715 0662057A81 22k 1 16W 5 R0716 0662057B16 560k 1 16W 5 R0717 0662057A85 33k 1 16W 5 R0718 0662057A93 68k 1 16W 5 R...

Page 125: ...5 76 Schematic Diagrams and Parts Lists h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 126: ...VHF Power AmpliÞer 5 25W Schematic Diagram Schematic Diagrams and Parts Lists VHF Power AmpliÞer 5 25W Schematic Diagram 5 77 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 127: ...V 20 C3602 2113741A57 33nF 50V C3603 2113741F49 10nF 50V C3604 2113741F17 470pF 50V C3605 2311049A45 TANT CP 10uF 10V 35 C3611 2113741F25 1nF 50V C3614 2113741F49 10nF 50V C3621 2113741A57 33nF 50V C3622 2113741A57 33nF 50V C3623 2113740A67 330pF 5 50V C3631 2113741A57 33nF 50V C3632 2111078B59 470pF 5 C3633 2113743A23 220nF 16V C3634 2311049A08 TANT CP 1 uF 10V 35 C3641 2113741F49 10nF 50V C3642 ...

Page 128: ...sed Q3641 4880214G02 TSTR NPN Q3642 4813824A17 TSTR PNP SOT Q3643 4880048M01 TSTR NPN DIG 47k 47k R3501 0662057A01 10 1 16W 5 R3502 0662057A25 100 1 16W 5 R3503 0662057A01 10 1 16W 5 R3511 0683962T51 120 1W R3513 0662057A01 10 1 16W 5 R3525 0680194M07 18 1W 5 Circuit Ref Motorola Part No Description R3526 0680194M07 18 1W 5 R3527 0680194M07 18 1W 5 R3551 0662057A73 10k 1 16W 5 R3611 0680149M02 The...

Page 129: ...VHF Synthesizer Schematic Diagram Schematic Diagrams and Parts Lists VHF Synthesizer Schematic Diagram 5 81 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 130: ...3723 2109720D14 100nF C3725 2109720D14 100nF C3726 2113741F49 10nF 50V C3727 0811051A19 1uF 5 D3701 4802233J09 Triple SOT143 RH 12 5kHz D3702 4805649Q04 Diode Varactor 20 25kHz not used E3702 2605915V01 SHLD PCB MOUNT R3701 0662057C61 270 1 16W 5 R3702 0662057C61 270 1 16W 5 R3703 0662057A49 1k 1 16W 5 R3705 0662057A89 47k 1 16W 5 R3708 0662057B47 0 1 16W R3709 0662057A01 10 1 16W 5 R3711 0662057A...

Page 131: ...VHF Main Board Synthesizer 5 84 Schematic Diagrams and Parts Lists h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 132: ...50 1 5K 470 R3762 2DTC143ZK 5 3 1 2 4 Q3742 150 R3786 E3732 L3742 1uH 1 5K R3779 150 R3777 33pF C3736 D3732 C3791 01uF 2 7K R3792 270 270 R3791 C3737 R3776 56pF 270 R3775 39 10 R3774 C3777 C3775 470pF 470pF C3774 L3773 10pF C3773 12pF 56nH 4 7K R3743 C3782 100pF 01uF C3792 L3734 D3754 9V3_4 T45 51 R3794 R3801 22 C3735 470pF L3750 1uH 2 7K R3778 E3731 2 2K R3752 9V3 L3783 120nH NU 10pF C3784 39pF C...

Page 133: ...pF 5 50V C3767 2113741F49 10nF 50V X7R C3771 2113743K15 100nF 16V C3772 2113740F51 100pF 50V C3773 2113740F29 12pF 5 50V C3774 2113740F27 10pF 5 50V C3775 2113741F17 470pF 50V C3777 2113741F17 470pF 50V C3780 2113741F25 1nF 50V C3781 2113741F49 10nF 50V C3782 2113740F51 100pF 50V C3783 2113740F41 39pF 5 C3784 2113740F27 10pF 5 C3785 2113740F27 10pF 5 50V C3791 2113741F49 10nF 50V C3792 2113741F49 ...

Page 134: ...057A83 27k 1 16W 5 R3752 0662057A57 2k2 1 16W 5 R3753 0662057A25 100 1 16W 5 R3754 0662057A15 39 1 16W 5 R3761 0662057A53 1k5 1 16W 5 R3762 0662057A41 470 1 16W 5 R3763 0662057A29 150 1 16W 5 R3765 0662057C61 270 1 16W 5 R3766 0662057A09 22 1 16W 5 Circuit Ref Motorola Part No Description R3767 0662057C61 270 1 16W 5 R3768 0662057A59 2k7 1 16W 5 R3769 0662057A49 1k 1 16W 5 R3771 0662057A29 150 1 1...

Page 135: ...VHF RX FE Schematic Diagram Schematic Diagrams and Parts Lists VHF RX FE Schematic Diagram 5 89 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 136: ...3300 4813833C02 DUAL SOT MMBD6100 D3301 4805649Q13 VCTR 1SV228 SOT23 D3303 4880154K03 Dual Schottky SOT23 D3304 4805649Q13 VCTR 1SV228 SOT23 D3331 4880174R01 QUAD SOIC 8 PIN L3302 2462587T23 COIL CHIP 470nH L3331 2462587T23 COIL CHIP 470nH L3332 2462587T17 COIL CHIP 150nH L3333 2462587T38 COIL CHIP 22nH 5 L3334 2462587T38 COIL CHIP 22nH 5 Q3301 4813827A07 NPN SML SIG MMBR9 Q3302 4813824A17 XSTR PN...

Page 137: ...ard RX FE 5 92 Schematic Diagrams and Parts Lists T3301 2505515V03 XFMR JEDI MIXER SMD 4 1 T3302 2505515V03 XFMR JEDI MIXER SMD 4 1 Circuit Ref Motorola Part No Description h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 138: ...VHF RX IF Schematic Diagram Schematic Diagrams and Parts Lists VHF RX IF Schematic Diagram 5 93 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 139: ...3740F51 100pF 5 50V C5234 2113743K15 100nF 16V C5235 2113740F51 100pF 5 50V C5236 2113740F51 100pF 5 50V C5237 2113743K15 100nF 16V C5238 2113743K15 100nF 16V Y5V C5239 2113740F44 51pF 5 50V D5201 4880154K03 Dual Schottky SOT23 FL5201 9180098D04 9180098D06 Filter CER 4 EL 455kHz 12 5kHz Filter CER 3WR 20 25kHz FL5202 9180097D04 9180097D06 Filter CER 6 EL 455kHz 12 5kHz Filter CER 6 EL 20 25kHz L52...

Page 140: ...5kHz U5201 5180207R01 IF IC Y5201 9102651Y01 9102652Y01 XTAL FLTR 45 1MHZ 12 5KHz 80dB XTAL FLTR 45 1MHZ 20 25KHz 80dB Y5202 9102651Y02 9102652Y02 XTAL FLTR 45 1MHZ 12 5KHz 60dB XTAL FLTR 45 1MHZ 20 25KHz 80dB Y5211 4802653Y01 XTAL OSC 44 645MHZ Circuit Ref Motorola Part No Description h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 141: ...0842 D0825 J0801 J0802 Q0825 Q0841 Q0842 Q0843 Q0844 Q0845 Q0846 Q0847 Q0848 Q0861 Q0862 R0801 R0802 R0811 R0812 R0813 R0814 R0815 R0816 R0817 R0818 R0825 R0826 R0841 R0842 R0843 R0844 R0845 R0846 R0847 R0848 R0849 R0850 R0851 R0852 R0853 R0854 R0855 R0856 R0861 R0862 R0863 R0864 U0841 VR0801 VR0802 VR0803 VR0804 VR0805 VR0806 VR0807 VR0809 Solder Side Control Head ÔKÕ Component Side Control Head ...

Page 142: ...iagram Schematic Diagrams and Parts Lists Control Head K Schematic Diagram 2 4 6 1 3 5 2 4 6 1 3 5 2 2 3 3 2 4 6 1 3 5 2 4 6 1 3 5 2 4 6 1 3 5 2 4 6 1 3 5 2 4 6 1 3 5 2 4 6 1 3 5 1 1 5 99 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 143: ...57A65 RES CHP 4k7 1 16W 5 R0826 0662057A65 RES CHP 4k7 1 16W 5 R0841 0662057A73 RES CHP 10k 1 16W 5 R0842 0662057A89 RES CHP 47k 1 16W 5 R0843 0662057A89 RES CHP 47k 1 16W 5 R0844 0660076A35 RES CHIP 270 5 1 8 R0845 0662057A89 RES CHP 47k 1 16W 5 R0846 0662057A41 RES CHP 470 1 16W 5 R0847 0662057A89 RES CHP 47k 1 16W 5 R0848 0660076A35 RES CHIP 270 5 1 8 R0849 0662057A89 RES CHP 47k 1 16W 5 R0850 ...

Page 144: ...5 102 Schematic Diagrams and Parts Lists h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 145: ... C0905 C0906 C0911 C0915 C0925 C0926 C0934 C0935 C0941 C0942 D0925 J0901 J0902 Q0925 Q0941 Q0942 Q0943 Q0944 Q0951 Q0952 R0901 R0911 R0912 R0913 R0914 R0915 R0916 R0917 R0918 R0919 R0920 R0921 R0922 R0925 R0926 R0933 R0941 R0942 R0943 R0944 R0945 R0946 R0947 R0948 R0951 R0952 R0953 R0954 U0932 U0941 VR0901 VR0902 VR0903 VR0904 VR0905 VR0906 VR0907 VR0908 VR0909 Control Head ÔPÕ Component Side Cont...

Page 146: ...am 2 4 6 1 3 5 2 4 6 1 3 5 2 4 6 1 3 5 2 4 6 1 3 5 2 4 6 1 3 5 2 4 6 1 3 5 2 4 6 1 3 5 2 4 6 1 3 5 2 4 6 1 3 5 1 1 2 2 3 3 BPO BP I B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11 B12 B13 B14 B15 B16 B17 B18 B19 B29 B20 B21 B22 B23 B24 B25 B26 B27 B28 B30 B31 B32 B33 5 105 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 147: ...B 50 150 Q0951 4813824A10 NPN 40V 2A B 50 150 Q0952 4813822A20 R0901 0660076A35 270 5 1 8 R0902 0662057A49 1k 1 16W 5 R0911 R0922 0662057A65 4k7 1 16W 5 R0925 0662057A65 4k7 1 16W 5 R0926 0662057A65 4k7 1 16W 5 R0931 0662057A65 4k7 1 16W 5 R0932 0662057A73 10k 1 16W 5 R0933 0662057A97 100k 1 16W R0941 0662057A73 10k 1 16W 5 R0942 0662057A89 47k 1 16W 5 R0943 0662057A89 47k 1 16W 5 R0944 0660076A35...

Page 148: ...Main Board Control Head P 5 108 Schematic Diagrams and Parts Lists h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 149: ... 246MHz Specific Information Table of Contents Table of Contents Chapter 6 1 Model Chart and Technical Specifications 6 2 Radio Tuning Procedure 6 3 Theory of Operation 6 4 PCB Schematic Diagrams and Parts Lists h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 150: ...Table of Contents 6 ii 216 246MHz Specific Information h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 151: ...pter 6 1 Model Chart and Technical Specifications Table of Contents Table of Contents Paragraph Page 1 0 Overview 1 2 0 Model Chart 1 3 0 Technical Specifications 2 3 1 General 2 3 2 Transmitter 2 3 3 Receiver 3 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 152: ...Table of Contents 6 1 ii Model Chart and Technical Specifications h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 153: ...ired Model AZM08MHF6AA2AN AZM08MFF6AA3AN AZM08MFF4AA3AN AZM08MFF6AA2AN Item Description X X X X PMBN4039_ Packaging Kit GCN6103_ Control Head Model A2 Display X X X X GCN6105_ Control Head Model A3 Display X X X X GLN7324_ Low Profile Trunnion Kit X X X X GMN6146_ Enhanced Compact Microphone X PMUE1609A GM950i 245 246MHz 20 25kHz Tanapa X PMUE1610A GM950i 220 240MHz 20 25kHz Tanapa X PMUE1611A GM9...

Page 154: ...Electrical Vibration IEC 68 2 27 and Shock IEC 28 2 6 European Dust Water protection IP54 ETS300 086 RF Specifications ETS300 113 Cyclic Keying Requirements ETS300 279 EMC Requirements ETS300 219 Signalling SPECIFICATION ITEM TYPICAL VALUE Channel Spacing 12 5 or 20 25 kHz Output Power 5 25W Modulation Limiting 2 5kHz 12 5kHz 4kHz 20kHz 5kHz 25kHz FM hum noise CCITT 40dB 12 5kHz 45dB 25kHz CCITT C...

Page 155: ...ase Option Adjacent Channel Selectivity 60dB 12 5kHz 70dB 20 25kHz ETS Spurious Rejection 70dB ETS Audio Distortion Rated Audio 5 Hum and Noise CCITT 40dB 12 5kHz 45dB 20 25kHz CCITT Audio Response 300 3000 Hz Flat or De Emphasised Co channel Rejection 12dB 12 5kHz 8dB 20 25kHz ETS Conducted Radiated Emission 2nW 0 1 1000MHz 20nW 1 4GHz Receive after transmit time 25msec Audio Output Power 4W inte...

Page 156: ...Technical Specification 6 1 4 Model Chart and Technical Specifications h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 157: ...0 216 246 MHz Tuning Procedure 1 1 1 General 1 1 2 PA Bias Voltage 3 1 3 Battery Threshold 3 1 4 Transmitter Power 4 1 5 Reference Oscillator 4 1 6 Front End Filter 5 1 7 Rated Volume 6 1 8 Squelch 6 1 9 Transmit Deviation Limit 7 1 10 Transmit Modulation Balance Compensation 7 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 158: ...Table of Contents 6 2 ii Radio Tuning Procedure h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 159: ...e menu the radio must first be read using the File Read Radio menu if the radio has just been programmed with data loaded from disk or from a newly created codeplug then it must still be read so that the RSS will have the radio s actual tuning values All Service windows read and program the radio codeplug directly you do NOT have to use the RSS Read Radio Write Radio functions to program new tunin...

Page 160: ...the voltage across a varactor in the reference oscillator to increase the frequency Clicking the Program button stores all the softpot values of the current window permanently in the radio In ALL cases the softpot value is just a relative number corresponding to a D A Digital to Analog generated voltage in the radio All standard measurement procedures and test equipment are similar to previous rad...

Page 161: ...scent current shown in table 6 2 1 The result is the tuning target 5 Click the Toggle Bias button to switch on the quiescent current again 6 Adjust the current per the target calculated in step 4 7 Click the Program button to store the softpot value 1 3 Battery Threshold The radio uses 2 battery threshold levels Tx High and Tx Low to determine the battery condition The Program buttons must only be...

Page 162: ...nt 1 7 Select the Point 2 value of the first frequency 8 Measure the transmitter power on your power meter 9 Enter the measured value in the box Point 2 10 Click the Toggle PTT button to dekey the radio 11 Repeat steps 3 10 for all test frequencies shown in the window 12 Click the Program button to store the softpot values 1 5 Reference Oscillator Adjustment of the reference oscillator is critical...

Page 163: ...2 3 6 Measure the RSSI voltage at accessory connector pin 15 with a dc voltmeter capable of 1mV resolution and at least 1Mohm input impedance 7 Change the softpot value by the stepsize shown in table 6 2 4 and note the RSSI voltage The target softpot value is achieved when the measured RSSI voltage change between step 6 and step 7 is lower than the tuning target for the first time The tuning targe...

Page 164: ...y range If the radio supports 20 or 25 kHz channel spacing selection the radio stores separate tuning data for 20 kHz and 25 kHz channel spacing Therefore both sets of tuning data should be tuned independently 1 Set the test box GTF180 meter selection switch to the Audio PA position and connect a SINAD meter to the METER port 2 From the Service menu select Rx Alignments 3 Select Squelch to open th...

Page 165: ...steps 3 6 for the remaining test frequencies 8 Click the Program button to store the softpot values 9 If the radio supports 20 or 25 kHz channel spacing selection repeat steps 1 8 for 20 kHz channel spacing using the Deviation Limit 20 kHz window 1 10 Transmit Modulation Balance Compensation Compensation alignment balances the modulation sensitivity of the VCO and reference modulation synthesizer ...

Page 166: ... 9 Click the Toggle PTT button to dekey the radio 10 Repeat steps 5 9 for the remaining test frequencies 11 Click the Program button to store the softpot values 12 If the radio supports 20 or 25 kHz channel spacing selection repeat steps 1 11 for 20 kHz channel spacing using the Modulation Balance 20kHz window Table 6 2 6 Transmitter Deviation Channel Spacing Deviation 12 5 kHz 2 2 2 3 kHz 20 kHz ...

Page 167: ...hesizer 4 2 8 Serial Peripheral Interface SPI 4 2 9 SBEP Serial Interface 5 2 10 General Purpose Input Output 5 2 11 Normal Microprocessor Operation 5 2 12 Control Head Model A2 or A3 6 Controller Board Audio and Signalling Circuits 3 0 General 7 3 1 Audio Filter IC AFIC 7 3 2 Audio Ground 7 4 0 Transmit Audio Circuits 7 4 1 Mic Input Path 7 4 2 External Mic Path 8 4 3 PTT Sensing and TX Audio Pro...

Page 168: ...ble Data Decoder PL DPL 15 7 2 High Speed Data Decoder 15 7 3 Alert Tone Circuits 16 216 246MHz Specific Circuit Description 8 0 Receiver Front End 17 8 1 Front End Band Pass Filter Pre Amplifier 17 8 2 Mixer and Intermediate Frequency IF Section 17 8 3 IF IC U5201 18 9 0 Transmitter Power Amplifier PA 5 25W 18 9 1 Power Controlled Stage 18 9 2 PA Stages 19 9 3 Directional Coupler 19 9 4 Antenna S...

Page 169: ...ont of the radio The control head contains a speaker LED indicators a microphone connector buttons and dependant of radio type a display These provide the user with interface control over the various features of the radio In addition to the power cable and antenna cable an accessory cable can be attached to a connector on the rear of the radio The accessory cable provides the necessary connections...

Page 170: ...632 and C0633 0635 are used to reduce high frequency noise and provide proper operation during battery transients This regulator provides a reset output pin 5 that goes to 0 volts if the regulator output goes out of regulation This is used to reset the controller to prevent improper operation Diode D0631 prevents discharge of C0632 by negative spikes on the 9V3 voltage Regulator U0601 is used to g...

Page 171: ...or through AFIC port GCB1 line B CONTROL the mechanical On Off button on the control head line ON OFF CONTROL or the ignition sense circuitry line IGNITION CONTROL If any of the 3 paths cause a low at the collector of Q0612 the electronic ON is engaged 2 4 Mechanical On Off This refers to the on off button located on the control head and which turns the radio on and off If the radio is turned off ...

Page 172: ...s bus in that the timing clock signal CLK is sent while SPI data SPI TRANSMIT DATA or SPI RECEIVE DATA is sent Therefore whenever there is activity on either SPI TRANSMIT DATA or SPI RECEIVE DATA there should be a uniform signal on CLK The SPI TRANSMIT DATA is used to send serial from a µP to a device and SPI RECEIVE DATA is used to send data from a device to a µP The only device from which data c...

Page 173: ...o external options Lines GP1 4 are inputs GP2 is an output and GP3 5 6 are bidirectional The software and the hardware configuration of the radio model define the function of each port Some ports are not connected on the 4ch radio refer to appendix B GP1 can be used as external PTT input or others set by the RSS GP2 can be used as normal output Q0441 placed or external alarm output Q0442 placed Th...

Page 174: ...trol Head versions A2 or A3 are available for user interface Both Control Heads contain the internal speaker the microphone connector several buttons to operate the radio and several indicator LEDs to inform the user about the radio status Additionally the Control Head model A3 uses a 3 digit 7 segment LCD display for the channel number The On Off button when pressed switches the voltage regulator...

Page 175: ...C generates its own 2 5 V bias for its internal circuitry C0153 is the bypass for the AFIC s audio ground dc bias Note that while there are AFIC VAG and BOARD VAG U0105 1 each of these are separate They do not connect together 4 0 Transmit Audio Circuits Refer to Figure 6 3 1 for reference for the following sections 4 1 Mic Input Path The radio supports 2 distinct microphone paths known as interna...

Page 176: ...onnector if this input is programmed for PTT The MIC signal is routed to the AFIC U0103 through R0146 and R0145 GM950E radio or through Op amp buffer U0106 2 and option board connector J0103 3 1 GM950i radio R0145 C0145 the amplifier inside the AFIC pins 9 10 and gain setting resistor R0147 pre emphasise the MIC audio signal After further limiting and filtering the modulation signal emerges from t...

Page 177: ...ion board processing the signal emerges at J0103 1 The source resistor of the option board output and C0145 the amplifier inside the AFIC U0103 9 10 and gain setting resistor R0147 pre emphasise the signal Inside the AFIC the signal follows a path identical to conventional transmit audio The modulation signal emerges from the AFIC at J0103 19 20 Both signals are weighted by resistors R0181 R0182 a...

Page 178: ... the radio receiver filters out any audio below 300Hz so these tones are never heard in the actual system Only one type of sub audible data can be generated by U0103 AFIC at any one time The process is as follows using the SPI BUS the µP programs the AFIC to set up the proper low speed data deviation and select the PL or DPL filters The µP then generates a square wave which strobes the AFIC PL DPL...

Page 179: ...e signals coming from the µP pins 58 59 and 62 The output signal of U0105 3 is routed to the AFIC U0103 13 through gate U0107 1 Inside the AFIC the signal enters the conventional transmitter audio path at the splatter filter input Gate U0107 1 controlled by µP port PC7 U0101 42 selects between data signal and FLAT TX AUDIO signal Microphone audio is muted during High Speed Data signalling h t t p ...

Page 180: ... pin 22 activates the fast squelch indicator signal at IF IC pin 18 FAST SQ Both squelch indicator signals CSQ DET pin 15 and FAST SQ pin 18 are combined weighted by resistors R0111 R0112 and fed to one of the microprocessor s ADCs U0101 15 for interpretation From the voltage weighted by the resistors the µP determines whether CSQ DET FAST SQ or both are active J0400 11 16 1 FLT RX AUDIO EXTERNAL ...

Page 181: ... signal is then filtered and goes through a limiter and exits the AFIC at PL DPL DECODER OUT U0103 27 At this point the signal will appear as a square wave version of the sub audible signal which the radio received The microprocessor U0101 64 will decode the signal directly to determine if it is the tone code which is currently active on that mode 6 3 Audio Amplification Speaker Speaker The output...

Page 182: ...ue of this output is 6 6Vp p 6 5 Filtered Audio The AFIC has an audio whose output at U0103 22 has been filtered and de emphasized but has not gone through the digital volume attenuator From AFIC U0103 22 the signal is routed through gate U0107 2 and AC coupled to U0106 4 The gate controlled by AFIC port GCB4 U0103 2 selects between the filtered audio signal from the AFIC or the unfiltered discrim...

Page 183: ... the input of centre slicer circuit U0105 2 The non inverting input of Op amp U0105 2 is fed through resistor R0162 Capacitor C0164 sets a low pass corner frequency of 3 3kHz The inverting input of Op amp U0105 2 is fed through resistor R0163 Capacitor C0163 sets a low pass corner frequency of 16Hz During operation R0163 C0163 establish an average DC offset level at U0105 2 pin 6 dependent on the ...

Page 184: ... this case a code contained within the SPI BUS load to the AFIC sets up the path and determines the tone frequency and at what volume level to generate the tone It does not have to be related to the voice volume setting Inside the AFIC this signal is routed to the alert tone generator the output of the generator is summed into the audio chain just after the RX audio de emphasis block Inside U0103 ...

Page 185: ...o stabilize gain impedance and intermodulation The collector current of approximately 11 16 mA drawn from the voltage 9V3 is controlled by a current source composed of Q3302 R3302 R3300 and R3311 R3313 In transmit mode the high K9V1 signal fed through diode D3300 switches off the current source and in turn the pre amplifier In receive mode K9V1 must be low to switch on the current source A 3 dB pa...

Page 186: ... ATT OUT enters the IF IC at pin 20 and is used to create a squelch indicator signal available at pin 15 CSQ DET The microprocessor controlled ADAPT signal at pin 22 activates the fast squelch indicator signal at IF IC pin 18 FAST SQ Both squelch indicator signals CSQ DET pin 15 and FAST SQ pin 18 are combined weighted by R0111 R0112 and fed to the microprocessor U0101 pin 15 for interpretation Fr...

Page 187: ...s off the collector current and in turn switches the antenna switch to receive The following stage uses two enhancement mode N Channel MOS FET devices Q8530 Q8531 and requires for each device a positive gate bias and a quiescent current flow for proper operation The voltages of the lines BIAS VLTG and BIAS VLTG 2 are set in transmit mode by two Digital to Analog D A converters U0731 4 U0731 11 and...

Page 188: ...te harmonic energy of the transmitter to specifications level R8550 is used for electro static protection 9 6 Power Control The power control loop regulates transmitter power with an automatic level control ALC loop and provides protection features against excessive control voltage and high operating temperatures MOS FET device bias power and control voltage limit are adjusted under microprocessor...

Page 189: ...y response is controlled by Op amp feedback components R0712 and C0711 Op amp U0701 3 compares the power control voltage PWR CNTL divided by resistors R0717 to R0719 with the voltage limit setting VLTG LIMIT SET from the D A converter U0731 13 and keeps the control voltage constant via Q0711 if the control voltage reduced by the resistive divider R0717 to R0719 approaches the voltage of VLTG LIMIT...

Page 190: ...on bias circuit R3714 and the synthesizer charge pump resistor network R3723 R3724 The synthesizer supply voltage is provided by the 5V regulator U3801 In order to generate a high voltage to supply the phase detector charge pump output stage at pin VCP U3701 32 a voltage of 13 VDC is being generated by the positive voltage multiplier circuitry D3701 1 3 C3716 C3717 This voltage multiplier is basic...

Page 191: ...his divider ratio of the pre scaler is controlled by the loop divider which in turn receives its inputs via the SRL The output of the pre scaler is applied to the loop divider The output of the loop divider is connected to the phase detector which compares the loop divider s output signal with the reference signal The reference signal is generated by dividing down the signal of the reference oscil...

Page 192: ...attenuator is used to adjust the VCO s deviation sensitivity to high frequency modulating signals The output of the balance attenuator is present at the MODOUT port U3701 28 and connected to the VCO modulation diode D3731 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 193: ... Diagram 1 of 2 3 80ch Model Closed Controller_IO Schematic Diagram 2 of 2 5 Parts List 4 6 Supply Voltage Schematic Diagram 7 Parts List 8 Power Control Schematic Diagram 9 Parts List 10 Power Amplifier 5 25W Schematic Diagram 11 Parts List 12 Synthesizer Schematic Diagram 13 Parts List 14 Voltage Controlled Oscillator Schematic Diagram 15 Parts List 16 RX FE Schematic Diagram 17 Parts List 18 RX...

Page 194: ...Table of Contents 6 4 ii PCB Schematic Diagrams and Parts Lists h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 195: ...632 C633 Q601 R601 R604 R605 8 5 4 1 U631 C101 C125 C126 C127 C110 C194 D101 R101 R103 R104 R125 R126 R127 U102 9 8 1 16 18 J101 1 C3726 C3713 C3701 C3702 C3724 C3727 R3723 R3701 R3702 R3724 C8548 C8642 C8530 C8532 L8532 L8531 R8641 L8542 R8541 C8529 C8533 C8536 C8534 C8535 C8537 C8543 C8541 C8542 C8546 C8544 C8547 L8541 C3735 C3745 C3757 C3763 C3731 C3744 C3758 C3766 C3765 C3733 C3734 C3737 C3736...

Page 196: ...621 Q8611 C8619 R8612 C8612 R8611 C8614 R8621 R8613 Q8612 C8603 L8601 C8602 R8617 R8616 C8601 C8604 D8601 C8522 C8523 C8525 C8527 R8525 R8527 R8523 Q8531 Q8530 3 1 2 3 1 2 R8522 TP8203 L8539 C8539 C8538 L8534 L8533 R8531 6 4 3 C8618 R8528 R8529 R8521 C8531 TP3732 C3786 C3785 C3784 R3781 R3785 R3786 R3782 C3751 C3780 C3782 L3783 L3781 R3794 Q3780 C3793 R3792 R3793 Q3790 C3790 C3791 E3732 C3783 R377...

Page 197: ...28 10K 5V PA_DISABLE 23 24 49 4 26 32 2 3 45 33 19 14 16 18 20 43 50 51 52 53 54 13 15 17 47 29 31 46 27 25 SPI_MISO VDD VRH VRL NC6 NC7 NC8 NC9 NC10 VSS1 VSS2 VSS3 XIRQ XTAL PE3_AN3 PE4_AN4 PE5_AN5 PE6_AN6 PE7_AN7 RESET PD0_RXD PD1_TXD PD2_MISO PD3_MOSI PD4_SCK PD5_SS PE0_AN0 PE1_AN1 PE2_AN2 NC3 NC4 NC5 CLK_E EXTAL IRQ MODA_LIR MODB_VSTBY NC1 NC2 STRA_AS STRB_RW PC1_AD1 PC2_AD2 PC3_AD3 PC4_AD4 PC...

Page 198: ...art No Description Circuit Ref Motorola Part No Description C0401 2113743A19 100nF 16V C0402 2113741F37 3 3nF 50V C0404 2311049A99 47uF C0405 2113741F25 1nF 50V C0406 2113741F25 1nF 50V C0407 2109720D14 CER LOW DIST 100nF C0411 2113741F49 10nF 50V C0412 2113741F17 470pF 50V C0413 2113741F49 10nF 50V C0414 2113741F17 470pF 50V C0419 2113741F25 1nF 50V C0420 2113741F25 1nF 50V C0421 2113741F17 470pF...

Page 199: ..._7 470pF C471 Q471 270 R476 0 R478 C472 470pF VR471 R477 3 3K FLT_A GP3 47K R431 R432 4 7K 5V PC1 Q431 470pF C431 VR431 FLT_A 5V R442 4 7K 4 7K R443 10K R441 PC0 C441 01uF Q441 Q442 470pF C442 VR441 GP3 5V VR444 R444 270 470pF C444 BUS JO40D C454 470pF 0 R456 FLT_A 9V3 Q481 R455 0 1K R481 R482 560 1K R454 470pF C451 R451 100K Q482 D481 C450 47uF 560 R450 100K R446 470pF C446 0 47uF C445 VR445 FLAT...

Page 200: ...R0186 0662057A83 0662057A90 27k 1 16W 5 12 5kHz 51k 1 16W 5 20 25kHz R0189 0662057A95 82K R0401 0662057A65 4k7 1 16W 5 R0402 0662057A49 1k 1 16W 5 R0404 0662057A73 10k 1 16W 5 Circuit Ref Motorola Part No Description R0405 0662057A73 10k 1 16W 5 R0406 0662057A81 22k 1 16W 5 R0407 0662057A77 15k 1 16W 5 R0411 0662057A73 10k 1 16W 5 R0412 0662057A65 4k7 1 16W 5 R0413 0662057A89 47k 1 16W 5 R0414 066...

Page 201: ...R606 R631 10 R632 10 D631 C631 0 1uF C632 33uF R621 2 2K VR621 D621 5V C621 470pF C622 47uF SHUTDOWN FEEDBACK INPUT 3 7 8 U631 5V_TAP ERROR OUTPUT SENSE 2 6 5 1 4 C633 022uF 47uF C634 C635 0 1uF 5V 9V3 9V3 9V3_1_8 9V3_8 FLT_A USW_ 5V USW_ 5V_CL GND SW_B SW_B BATTERY_VOLTAGE RESET SW_B _8 30K R641 R642 10K C641 0 1uF VR641 C613 470pF Q611 47uF C611 R614 1K D611 EMERGENCY_CONTROL IGNITION_CONTROL B ...

Page 202: ...813833C02 DUAL SOT MMBD6100 Q0601 4880214G02 MMBT3904 Q0611 4805921T02 FMC2A Q0612 4813824A10 NPN 40V R0601 0662057A73 10k 1 16W 5 R0602 0660076E70 FILM 7500 R0603 0660076E51 FILM 1200 R0604 0662057A49 1k 1 16W 5 R0605 0662057A69 6k8 1 16W 5 R0606 0662057B47 0 1 16W R0611 0662057A51 1k2 1 16W 5 R0612 0660076A61 3300 5 1 8 R0613 0660076A61 3300 5 1 8 R0614 0662057A49 1k 1 16W 5 R0615 0662057A73 10k...

Page 203: ...7 DAC_CE_7 CNTL DAC_CE SV SW_B CNTL SPI_DATA_SRC CNTL SPI_CLCK_SRC K9V1_ENABLE_7 PA_ENABLE_7 CNTL PA_ENABLE CNTL K9V1_ENABLE Q742 0 1uF C742 1K R742 1K R741 Q741 9V3 Q731 16 Q1 2 Q2 4 Q3 11 Q4 13 R1 3 R2 5 R3 12 R4 14 VDD 10 CLK D_IN 1 D_OUT 15 6 EN 7 GND 8 NC 9 NC1 U731 D731 47K R723 C722 100pF 3 1 4 11 U701 1 2 D721 100K R724 0 1uF C731 10K R725 C703 0 1uF VAG 9V3 R731 22K 4 7K R734 Q732 R736 15...

Page 204: ...048M01 TSTR NPN DIG 47k 47k Q0742 4805128M27 TSTR PNP SOT89 BSR33 R0701 0662057A93 68k 1 16W 5 R0702 0662057A89 47k 1 16W 5 R0703 0662057A73 10k 1 16W 5 R0704 0662057A89 47k 1 16W 5 R0711 0662057A81 22k 1 16W 5 R0712 0662057B47 0 1 16W R0713 0662057A61 3k3 1 16W 5 R0714 0662057A75 12k 1 16W R0715 0662057A81 22k 1 16W 5 R0716 0662057B16 560k 1 16W 5 R0717 0662057A85 33k 1 16W 5 R0718 0662057A93 68k...

Page 205: ...am Diagrams and Parts Lists 6 4 11 216 246MHz Power Amplifier 5 25W Schematic Diagram 1nF 39nF 20pF 36pF 12pF 30pF 62pF 62pF 75 150 100 75 91 120pF 120 75 13 38 13nH 38 13nH 20pF 38 13nH 22pF 15pF GM950EI001 O h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 206: ...31 4802482J02 DIODE PIN MA COM J8501 0905901V02 RF CONNECTOR J8601 0905902V04 POWER CONNECTOR L8501 2462587N48 39nH L8503 2462587T38 COIL CHIP 22nH 5 L8531 2460591C23 SQUARE COIL 16nH 3T L8532 2484657R01 Ferrite Bead L8533 2460591C23 SQUARE COIL 16nH 3T Circuit Ref Motorola Part No Description L8534 2484657R01 Ferrite Bead L8539 2460591M77 COIL SQUARE 38nH L8541 2460591X01 COIL SQUARE L8542 248465...

Page 207: ...216 246MHz Synthesizer Schematic Diagram Diagrams and Parts Lists 6 4 13 216 246MHz Synthesizer Schematic Diagram 680 5 6K GM950EI003 A h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 208: ...720D14 100nF C3725 2109720D14 100nF C3726 2113741F49 10nF 50V C3727 0811051A19 1uF 5 D3701 4802233J09 Triple SOT143 RH 12 5kHz D3702 4805649Q04 Diode Varactor 20 25kHz E3702 2605915V01 SHLD PCB MOUNT R3701 0662057A35 270 1 16W 5 R3702 0662057A35 270 1 16W 5 R3703 0662057A49 1k 1 16W R3705 0662057A73 0662057A89 10k 1 16W 5 12 5kHz 47k 1 16W 5 20 25kHz R3708 0662057B47 0 1 16W R3709 0662057A01 10 1 ...

Page 209: ... R3762 2DTC143ZK 5 3 1 2 4 Q3742 150 R3786 E3732 L3742 1uH 1 5K R3779 150 R3777 C3736 D3732 C3791 01uF 2 7K R3792 270 270 R3791 C3737 R3776 270 R3775 39 10 R3774 C3777 C3775 470pF 470pF C3774 L3773 C3773 12pF 4 7K R3743 C3782 100pF 01uF C3792 L3734 D3754 9V3_4 R3794 R3801 22 C3735 470pF L3750 1uH 2 7K R3778 E3731 2 2K R3752 9V3 L3783 NU C3784 C3783 D3731 68nH L3731 D3751 C3733 D3752 8 2pF 1uH L375...

Page 210: ...ANT CP 10uF 10 10V D3731 4805649Q13 VCTR 1SV228 SOT23 D3732 4805649Q13 VCTR 1SV228 SOT23 D3733 4805649Q13 VCTR 1SV228 SOT23 D3739 4813825A05 MMBD301 D3751 4805649Q13 VCTR 1SV228 SOT23 D3752 4805649Q13 VCTR 1SV228 SOT23 D3754 4813825A05 MMBD301 E3731 2602641Y02 SHIELD ARIANE VCO E3732 2605915V01 SHLD PCB MOUNT L3731 2462587T13 COIL CHIP 68nH L3732 2462587T30 COIL CHIP 1uH L3733 2462587T30 COIL CHIP...

Page 211: ...Lists 6 4 17 216 246MHz RX FE Schematic Diagram 11pF D3311 C3351 11pF D3312 C3352 11pF 3 9pF 1 5K 1 5K 33pF 43pF C3355 11pF D3313 C3353 11pF D3314 C3354 11pF NU 33pF 39pF 8 2nH 10nH R3340 NU R3341 NU NU GM950EI004 A h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 212: ...MBD6100 D3303 4880154K03 Dual Schottky SOT23 D3311 4802245J22 VCTR IT363 D3312 4802245J22 VCTR IT363 D3313 4802245J22 VCTR IT363 D3314 4802245J22 VCTR IT363 D3331 4880174R01 QUAD SOIC 8 PIN L3302 2462587T23 COIL CHIP 470nH L3331 2462587T23 COIL CHIP 470nH L3332 2462587T17 COIL CHIP 150nH L3333 2462587N40 COIL CHIP 8 2nH 5 L3334 2462587N41 COIL CHIP 10nH 5 Q3301 4813827A07 NPN SML SIG MMBR9 Q3302 4...

Page 213: ...216 246MHz RX IF Schematic Diagram Diagrams and Parts Lists 6 4 19 216 246MHz RX IF Schematic Diagram h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 214: ... 2113743K15 100nF 16V C5238 2113743K15 100nF 16V Y5V C5239 2113740F44 51pF 5 50V D5201 4880154K03 Dual Schottky SOT23 FL5201 9180098D04 Filter CER 4 EL 455kHz FL5202 9180097D04 Filter CER 6 EL 455kHz L5201 2462587N69 CHIP IND 1200 NH L5203 2483411T74 Inductor Chip Shielded L5211 2483411T74 Inductor Chip Shielded Q5201 4813827A07 MMBR941 R5201 0662057A73 10k 1 16W 5 R5202 0662057A85 33k 1 16W 5 R52...

Page 215: ... CTCSS Codes A i Appendix A Table of Contents Table of Contents PL DPL Codes Paragraph Page 1 0 PL Codes and Digital PL DPL Codes 1 2 0 Self Quieting Frequencies 1 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 216: ...Table of Contents A ii PL CTCSS Codes h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 217: ... B GROUP C Code Freq Code Freq Code Freq XZ XB YB 1Z 1B 2A 3Z 3B 4A 5Z 6A 7Z M1 M3 67 0 77 0 88 5 100 0 107 2 114 8 123 0 131 8 141 3 151 4 173 8 186 2 203 5 218 1 XA YZ ZA 1A 2Z 2B 3A 4Z 4B 5A 6Z 6B 7A M2 71 9 82 5 94 8 103 5 110 0 118 8 127 3 136 5 146 2 156 7 167 9 179 9 192 8 210 7 WZ WA WB YA ZZ ZB 5B 8Z 69 3 74 4 79 7 85 4 91 5 97 4 162 2 206 5 023 043 071 116 143 165 225 251 266 325 356 413...

Page 218: ...Self Quieting Frequencies A 2 PL CTCSS Codes h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 219: ...Device Connectors B i Appendix B Table of Contents Table of Contents External Device Connectors Paragraph Page 1 0 Accessory Connector Details 1 2 0 Microphone Connector 3 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 220: ...Table of Contents B ii External Device Connectors h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 221: ...GP 1 This is a digital input only The RSS details which functions may be assigned to this pin by the code plug The primary use for this pin will be external PTT See Note 1 Pin 4 General purpose 2 GP2 This is a digital output only The RSS details which functions may be assigned to this pin by the codeplug The primary use for this pin is as external alarm output See Note 3 Pin 5 Flat TX audio This i...

Page 222: ...ay be overridden during certain tuning operations For discriminator audio the nominal ouput level is 330mVRMS for 60 deviation The impedance is 600ohms For Þltered audio the nominal ouput level is 600mV for 60 deviation The impedance is 600ohms Pin 12 General purpose 5 GP5 This is a digital input output and is also available on the internal option connector J0103 8 The RSS details which functions ...

Page 223: ...ssumed that this PTT is a mechanical switch so the software will always debounce this input The microphone PTT line is also available at the internal connector J0102 1 as a bi directional line i e an internal option can use the line both to key up the radio and to know when the radio is already keyed up For this to work microprocessor port C4 has to be reconÞgured as an output and driven low whene...

Page 224: ...Microphone Connector B 4 External Device Connectors h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 225: ...Radio Conversion C i Appendix C Table of Contents Table of Contents Radio Conversion Paragraph Page 1 0 How to alter the radio for Base Station Operation 1 h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 226: ...Table of Contents C ii Radio Conversion h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 227: ...eration UHF Radio Conversion If the UHF radio is conÞgured for a base station application R5319 is not placed and TP5301 and TP5302 are shorted VHF Radio Conversion If the VHF radio is conÞgured for a base station application R3318 is not placed and TP3301 and TP3302 are shorted h t t p w w w m y r a d i o 1 6 8 n e t ...

Page 228: ...How to alter the radio for Base Station Operation C 2 Radio Conversion h t t p w w w m y r a d i o 1 6 8 n e t ...

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