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Manual Rev 2.6.5 (pdf 8 MB)

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1. 2 UA A CONTRAST 7 SLOPE 8 DB SUCTUS ec 7 mm MCN a 8 UA Xr 2 TRIGGER COHTRAST Hour SLOPE 4 isl AUD on 308 kHz HOTRIG 5 qm E S E E a A S coin ud 8 UA Xr imig n 2 UA TRIGGER COHTRAST Hour SLOPE 4 Troubleshooting Appendix Trace SPI bus latch signal DDS board J2 11 Trace SPI bus data signal _500 DDS board J2 6 Trace SPI bus clock signal DDS board J2 8 Trace SPI bus data signal SPI SDO DDS board J2 6 Note Clock signal is filtered and inverted the main board and R95 C91 and in the RF filter board IC3 and R8 C46 If you are doing fault finding clock signal should be checked also from 74HC595 pin 11 HOTRIG 8 UA i Trig T B 2 A COHTRAST A lt SLOPE 8 1 HOTRIG un NE DR ee eel vert 7 213 onu M eod e M ite eue opas l c T m vostro T Ps Tria T B TRIGGERS
2. ReR7R9RIGRI7 fpo _____ 5 2 ____ ___ _ SMD capacitor SMD capacitor Ci C4 C5 C7 C8 C13 C14 100n SMD capacitor C20 C21 size 0805 7 SMD capacitor Tanatlum SMD capacitor size B N NJ O lt LD1 LGM670JM or similar type 1 LED 0805 Dual opamp CMOS 5 8 IC2 TLC277 1 or TLC272 IC1 ISD17240SY 1 Voice recorder 5028 4066 4 Philips 74HC4066 CMOS switch SO14 J5 J8 Header socket 1x3 Snippet of Fisher BL5 36Z Farnell 9728910 7 Header socket 1x14 JUMA TRX2 Voice Memory PCB Rev C Total Qty 39 Part Lists External Keyboard Option Appendix JUMA 1 external keyboard partlist Rev OH2NLT 2008 02 29 Value type OQty Description 2 Resistor SMD size 0806 H3 R4 R5 R6 R7 R8 R9 R10 100k R11 R12 R15 R17 Ris meno Pee SMD capacitor SMD capacitor SMD capacitor Tanatlum SMD capacitor 47u 10V or more size 545 Shotky diode 5023 Si2307DS 51230905 IRLML5203TRPBF SOT 23 MOSFET P type Rds lt 0 5 ohm MOSFET N type SOT 23 or similar Rds lt 10 ohm LP2951 Voltage regulator 508 PIC16F628A I P Microcontroller DIP18 Installed with socket see pictures CM
3. cc 39 tad 40 MEMORY OPTION rU 41 PARIS LISTS e i APPENDIX SCHEMATIC EAEN EA NENE EAEE EEEE OEEO APPENDIX B BEOCK APPENDIX BOARD LAYOUT PARTS PLACEMENT APPENDIX D TROUBEES HOO TUNG APPENDIX E SERIAL COMMUNICATIONS PROTOCOL 0 cccccccccccccccccscccccccccccccccccccccccccccccccccccccccccccccccccccccccccccseccees APPENDIX F BOOT LOADER INSTRUCTIONS 25 22 iso E E EOR Eaka eeto APPENDIX Introduction JUMA TRX2 is a high performance HF transceiver for SSB and CW with high dynamic range It uses a quadrature sampling technique for modulation and demodulation with a low noise phasing method The JUMA TRX2 uses a DDS controlled VFO for excellent frequency stability and signal purity An internal microcontroller is controlling all functions of the transceiver JUMA TRX2 is available as a kit with two kit alternatives 1 The discrete kit with components and bare circuit boards 2 The modular kit with assembled and tested boards The enclosure is machined and printed in both kit alternatives A completely assembled transceiver is also available with the help of JUMA community Additionally there will be two models
4. Tip 1 Use very fine small gauge solder a narrow soldering iron tip and tiny amount of solder Tip 2 Use gentle pressure on tweezers to avoid pinching and shooting the device across the room Tip 3 For ICs or transistors solder tack the opposite corner pins first before setting the tweezers aside and soldering the remaining pins Doofus Method Using a doofus allows you to use both hands for soldering The doofus is a home made device using a coat hanger or a fine wire and some weights to hold the component in place The technique used is the same as Bee s wax method outlined above but you have both hands free for the solder work Here are some pictures to give you a better idea Notice the baking pan use to keep parts contained Here is just one of many good sites for such tips http www al7fs us AL7FSSATSprint2 html Assembly Suggestions Alternate methods of SMD construction The following method are mentioned as alternate means to building with SMD These methods must be used with extreme caution to avoid permanent and un repairable damage to circuit boards and components These methods allow soldering of all components at one time by having you place the components on the pc board using solder paste and then baking the board to flow the solder Convection Oven and Solder Paste often called the Cash Olsen Method http www hpsdr com Public Projects SMT SMT html This method uses
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7. 13 14 4 8 5 2 NOTE REG2 13 14 9 6 10 4 The 5 volt in OPAMP table is a half of the 10 volt supply voltage e g if the REG2 out is 10 2 V the 10 is 10 2 and the 5 is 5 1 V Pini Pin2 Pin3 Pin4 Pins Pin6 Pin7 8 x 1 4 14 14 t4 x 10 It is recommended to use a series resistor in the A7 2 8 1 4 14 1 4 1 4 lt 50 10 positive lead to avoid possible RF influence to the reading Suitable resitor value is 4k7 22k The resistor in not needed when measuring pure DC signals Conditions Transmit state Mode LSB f 3 7 MHz Filter WID AGC slow Speechproc OFF NB OFF MIC input dummy load Pini Pin2 Pin3 4 5 Pin7 Pin8 Pin9 Pin10 Pin 11 Pin 12 Pin 13 Pin 14 1015 5 0 5 0 o 5 5 0 5 5 5 Pint Pin2 Pin3 4 5 Pin7 Pin8 Pin9 10 Pin 11 Pin 12 Pin 13 Pin 14 Pin 15 Pin 16 pict 5 2 x 12 12 x x 2 5 5 c2 2 12 12 12 12 12 x 0 0 0 j 2 5 5 Conditions Transmit state Mode CW f z 3 7 MHz Filter WID AGC slow Speechproc OFF NB OFF MIC input dummy load Pini Pin2 Pin3 4 5 Pin7 Ping Pin9 Pin 10 Pin 11 Pin 12 Pin 13 Pin 14 pica of 5 5 5 0 o 5 5 0 5 0 0
8. configure registers DXEGOUDB start write 2 write completed Successful communication between the PC software and JUMA TRX2 brings the above screen visible Click the open HEX file button and select the hex file from your hard disk for example juma trx2 hex amp ingenia dsPIC bootloader loading and writing 3 3 juma t IT x Load amp Write 34 93 401 98 45 info ingenia cat com Load your HEX File Select ingenia cak com the appropiate writing udi NI software version 1 1 options and start the write rest idsPIC bootloader started 23 13 05 11 load HEX File za S0 Process open HEX File The Following checked options have program Flash been detected into the 1 IF you don t want Eo write them into dsPIC uncheck them prior ba start writing operation B configure registers BER write After selection of the hex file the start write button appears Click start write button to start the flash programming The programming should take about 5 15 seconds depending on the baud rate Note After successful programming you have to disconnect power from the power supply because the TRX2 green PWR button does not work in this state Finally switch on the JUMA TRX2 and
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11. two band model TRX2 for 80m and 40m ham bands and the all ham band model TRX2A with a general coverage receiver The two band model can be upgraded any time into the all band model by adding related modules Several add on option modules are also available for both models Features The two band model frequency coverage is 2 Excellent AGC with slow and fast modes MHz 8 MHz Dual DDS controlled VFOs with a split TX RX The all band model has all ham bands RX function 100 kHz 30 MHz First class optical VFO encoder with 480 Transmit modes LSB USB CW and tune steps per revolution Output RF power 10 W 7 digit frequency display 10 Hz display Built in keyer Dot priority Iambic A Iambic resolution B and straight modes Three selectable VFO tuning speeds Click less CW keying with adaptive time Slow Fast Very Fast Three filters Wide Medium and Narrow with VFO lock feature a good shape factor RIT with it s own tuning knob Filters are user adjustable Graphical S meter range 51 59 40 dBm Outstanding Dynamic Range and good Non volatile memory for VFOs modes sensitivity settings and calibration Configurable features AGC Slow Fast Keyer Dot priority Iambic A B Straight LPF corner frequency setting RS232 mode TRX2 Yaesu CAT Test functions Speech Processor ON OFF Display brightness contrast Mic connector input level MIC LINE Option Modules Voice memory plug in Ext control unit for voice memory Noise blanker plug in Se
12. H 15 TMO BAND PA ROREM 16 CONNECTOR BOARD anes 18 572 BOARD 19 RF FILTER BOARD 20 CABINETAND 21 ELATCABLES WITH DIMENSI NS gt ___ _______ _ _ ____ 22 OPERATION 23 CIRCUIT DESCRIPTIONS 24 DDS CONTROEJTSOAE d niue 24 IM M M AL Me M gt WANNER gt LA UT 28 T T mem 31 PHASE BOARD 33 PIER BOARDS 33 NOIGE MEMORY Sa sd irte M uu tA M pu rtu 34 E td o rp E bie ett eei tbt 35 36 819555 OR e a Moo 36 TR NUT 38
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14. Use the front plate to fine align the push buttons when soldering them 4 When ready mount the push buttons use the front plate to align the buttons before you begin to solder Limit soldering time with the pin headers to avoid melting the plastic Solder one pin then check pin header alignment before soldering the remaining pins LCD module to DDS Board installation First fix the LCD module mechanically to the DDS Board with the placed pin headers before soldering the pin headers to the boards This is to allow correct spacing between the boards and to align the boards properly PIN HEADER MIC socket mounting soldering terminals DDS board Front panel av Important note Do not solder the Mic connector yet It must a be fastened to the front plate before soldering nem Fixing nut Before soldering the MIC connector to the DDS board it must be fastened to the front plate Encoder installation Lock washer internal tooth Hex nut Check the encoder tooth washer thickness Flatten it with a hammer if needed Before mounting the encoder flatten the toothed washer to reduce its thickness Use a hammer if needed This washer will mount on the encoder shaft behind the front plate DDS Control Display Board 12 DDS Control Display Board Front Plate mounting Mount the front plate and tighten Tighten also the enco
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16. Memory Option 42 JUMA TRX2 Memory Option JUMA TRX2 Voice Memory option has the following features Recording from microphone Recording from JUMA TRX2 receiver Playing a recording with JUMA TRX2 speaker as output Transmitting a recording in LSB or USB Stop an operation at any time Memory capacity Memories 1 9 10 seconds capacity each Memory 10 120 seconds capacity Hardware installation of the JUMA TRX2 Voice Memory option Install JUMA TRX2 Voice Memory option board into the pin headers on DDS board inside the JUMA TRX2 Note remove the audio jumper from pin header J8 pins 1 2 before inserting the option board Connect the RS 232 cable between the JUMA TRX2 and the PC See the cable wiring diagram RS 232 JU A TRE2 5 232 port 35 mm plug connector JUMA TRX2 RS 232 cable wiring diagram JUMA TRX2 settings Go to the JUMA configuration pages with a long CONFIG button push Go to the RS232 page with short pushes and select RS232 VoiceMem with VFO knob Instructions to use the JUMA TRX2 Voice Memory control Windows control software Select a com port from the Com menu Com setting will be saved for the next session Select a function MIC record RX record Play or Transmit by clicking the corresponding button Click a memory number to activate the operation Click Stop to cancel an operation if needed A beep tone will be heard from Juma speaker when a command is received Alternat
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18. PTT in out From PPT IN signal JUMA TRX2 control software finds out when TX is on and performs needed operations OUT signal enables software controlled TX This is needed for CW keyer operation DASH DOT DASH and DOT are the key state inputs for keyer software Inputs are sampled with 1ms interval KEY Key output controls the CW modulator the main board CW keyer software and tune mode logic drives this signal SPI bus to main and PA boards Four signals form the SPI bus SPI SDI SPI SDO SPI CLK and SPI LATHC SPI SDlis not used SPI signals are controlled by dsPIC30F6014A SPI I O block and TRX2 control software minimize RF noise SPI bus is active only when a change is needed in the main or PA board outputs state Main board SPI bus controlled digital outputs SSB CW Select main board SSB or CW operating mode SB SELECT Select sideband LSB or USB NAR Select SSB or CW band pass filter FAST AGC Select AGC speed PROC ON Select TX speech processor ON OFF NB Select noise blanker option ON OFF MIC LINE Select Mic input signal level 7M Select 3 5 or 7 MHz RF filters in two band PA board All band Filter and PA board digital outputs Output register is located in the RF FILTER BOARD but two of the control signals are connected to the PA board BO B1 B2 Three bit binary coded filter select See filter board schematics for details ATT 0 ATT 1 Two bit binary coded RF attenuator control for the PA board S
19. R7 R8 R16 R17 R26 R27 R8 R16 R17 R26 R27 K R48 R50 e 5 47 R42 R44 8209 2 R57 6 E M yi H14 R25 R36 R37 R38 R41 10k 10 H51 R52 R55 R56 R5 Not installed SMD resitor 1 Multi turn SMD side adjust R6 R9 R15 R18 trimmer resistor Bourns Ww 3214J 3214G 3224J or 3224G Note Turn the trimmers initially to zero bias see instructions C1 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C30 C31 C32 C33 100n 34 Ceramic size 1206 X7R C34 C35 C36 C37 C38 C42 C43 C45 Tantal SMD size B Ba oo 14 gt 200 EE 100MHz gt 200 mA Ferrite bead 0 Murata BLM31B601S size 1206 12131516 220nH SMD inductor size 1210 Wide band NPN transistor 01 02 545 Double Schottky diode 50723 03 D4 D5 06 D7 D8 BAV99 6 Double diode SOT23 Voltage Reference 2 5V MOSFET N type SOT23 TR7 IRLML5203 similasr Rds lt 1 ohm Part Lists All Band Board Appendix JUMA TRX2 All Band PA board part list Rev A2 update 2008 03 10 install the parts in this order Part number Value type Qty Description Picture Diode 1A size melf TDK signal filter ZJYS51R5 M4PA or ZJYS51R5 M4PA 01 Wurth signal filter type 744 205 NEC UD2 12NU or Panasonic AGQ200A12 Snippet of Tyco Electronics 5 826632 0 Farnell 34185
20. 2x8 e g snippet of Tyco Electronics 5 826632 0 or MOLEX 90131 0775 Pin header 2 54 mm pitch lenghth max 6 7 mm NO 2 2 e g snippet of Tyco Electronics 5 826632 0 or MOLEX 90131 0775 Pin header 2 54 mm pitch pin lenghth 6 7 mm e g snippet of Harwin M20 9992046 or MOLEX 90120 0784 Pin header 2 54 mm pitch pin lenghth max 6 7 mm pin lenghth max 6 7 mm pin lenghth max 6 7 mm For test programming operations power on jumper O NO Insert into J8 pins 1 2 For audio path back to board Second one is for J4 Do not instal it for normal operation Pitch 2 54 mm Everbouquet MC1602C8 SBLWU Blue or LCD module 2 x 16 with LED back light 12 o clock type Everbouquet MC1602C8 FBLWU Black N o Part Lists DDS Control Board Appendix JUMA TRX2 DDS board part list for PCB Rev B update 2007 12 04 Patnumber Value type Note 1 x 16 For LCD module connection Samtec BBL 116 G E LCD side Low profile pin header townrofieheadersocket 4 For LCD module connection 4 4 Samtec SL 116 G 19 DDS board side aiii Tinned copper wire 0 5 mm L approx 300 mm 1 Alternative LCD connection ES interconnection R9 R24 R30 100k Bourns 3310Y 001 104L 3 Miniature potentiometer Avago Technologies HRPG ASCA 11R Resol
21. C1 C31 C2 C3 404 29 027 C12 C10 C11 C20 Ceramic 0805 X7R C29 C9 C4 C25 C24 C23 C22 C21 C53 C65 C70 C71 u2 16V 4 0805 Tantalum Capacitor SMD 1 Tantalum Capacitor SMD Inductor SMD Case size 0805 Ferrite bead SMD Case size 0805 Diode dual or similar SOT 23 common cathode Si diode N 4 lt oO lt lt 10 0 018 o N lt lt gt DA o 1 1 N Q KIN N O 5 I O C2 m U O O o UJ Co 2 UJ K N c 600ohm 100MHz 70 SOT 23 IRLML5203TRPBF SOT 23 or Si2307DS or Si2309DS MOSFET P type Rds 0 5 ohm MOSFET N type 2 7002 5 23 5 ior similar Rds lt 10 ohm IRFR110 DPAK 1 MOSFET N type Part Lists DDS Control Board Appendix JUMA TRX2 DDS board part list for PCB Rev B update 2007 12 04 Note AD9851BRSZ AD9851BRS IC1 Not assembled D Flip Flop only for future use 7 5MHz clock for CPU PLL IC6 74LVC2G80 SSOP HIN232ACB Intersil or ST232CD ST Microelectronics or MAX232ACSE Maxim RS232 driver 016 Microchip dsPIC30F6014A 30 Microcontroller DSP Install IC2 or IC5 not both N X 30MHz 5V 915 package Low noise oscilator 30MHz 5V DIP14 package
22. Solder the ICs first to allow you more working room at the board surface then proceed to resistors and caps and finish with the taller components Bend legs as shown Use a small screw driver shaft to help form the curved bends Then mount the MOSFETs to the rear plate with the provided hardware as shown The set of holes next to the MOSFETs shown filled with screws and nuts are for mounting the Two Band PA MOSFETs and are not used here Insert the provided screw and nut to fill this hole Mount the board to the rear panel and solder the MOSFETs PA EN gt Another view of PA FET mounting Completed All Band PA and Connector board RF Filter Board 20 RF Filter Board for All Bands Solder the ICs first to allow you more working room at the board surface then proceed to resistors and caps and finish with the taller components Limit soldering time with the relays and use caution when soldering near them so not to melt their plastic casing Solder only one pin of the pin headers check for proper alignment then solder the remaining pins Front view of RF Filter Board Rear view of RF Filter Board There are six toroidal coils to be wind for the RF board L28 L33 on T25 2 cores 32 L33 130 131 28 and 129 250nH Core Amidon 25 2 500nH Core Amidon 25 2 1uH Core Amidon 725 2 red red red 17 turns 0 4 mm enamel 9 turns 0 4 mm enamel 12 turns 0 4 mm en
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24. 0 90 180 and 270 degrees called and Q signals and their complement signals The and signals are amplified in the differential preamplifiers A1 and A2 The of these preamplifiers are set precise to equal each other by using 0 1 feedback resistors R8 The preamplifiers are feeding the RX polyphase module which proportionally delays the Q signal by 90 degrees compared to the signal Read more of the polyphase module in its own description The signals after the polyphase is buffered and further amplified by the instrumentation type amplifier A3 and A4 A The output of the amplifier A4 A is demodulated SSB audio signal at the band width of 15 kHz The signal is then filtered the SSB CW 17 filter module This 1 filter has two band pass ranges 300 Hz 2 5 kHz for SSB and 300 Hz 1kHz for CW The width is selected by the pin 5 in the filter module Read more of the 1 filter module in its own description section Circuit Descriptions Main Board 29 After the 1 filter the signal is fed to the AGC circuit which consists of the variable gain amplifier A4 B the full wave signal rectifier amplifier and the AGC rise and fall timing components R44 R45 R46 R47 R67 C34 and C35 In the fast AGC mode the MOSFET TR6 is used to connect the resistor R67 in parallel with the timing circuit The AGC control voltage which is coming from the timing components defines the resistance of the feedback FET 4 and thus defi
25. 05V at analog input ID drain current PA board contains measurement shunt resistors power peak detectors and a buffer amplifier Amplifier output is scaled to produce 1 21V A at analog input S METER Main board audio AGC circuit generates S meter voltage S9 corresponds to about 1V at analog input BATT JUMA TRX2 power feed voltage This measurement is taken from DDS board power supply input with a voltage divider 14V input generate 3 25V at analog input Tone generator User interface tones and CW side tone are generated with dsPIC30F6014A timer system Tone signal is delivered as a 5V logic signal to main board where it is conditioned filtered and summed to the audio chain SCAF filter clock generator Switched capacitor SCAF filters are used in the JUMA TRX2 RX and TX chains The SCAF filter is a low pass filter which response is defined with filter clock frequency Filter clocks are generated with dsPIC30F6014A timer system See JUMA TRX2 operating instructions for filter adjustments Circuit Descriptions DDS Control Board 26 Digital control signals Several digital control signals are read and generated by JUMA TRX2 control software Some of these signals are directly connected to dsPIC30F6014A general purpose digital I O pins Additional digital siginal are generated locally in the main board and in the al band model filter board These digital outputs are controlled via the SPI bus Directly connected signals
26. 5 Pin3 4 5 Pin7 Ping Pin9 10 Pin 11 Pin 12 Pin 13 Pin 14 Pin 15 Pin 16 Pint 2 pict 5 2 x x 12 0 12 x x 2 5 5 __ 002 5 22 12 0 007 0 0 014 014 5 5 n m PTT Key down Troubleshooting Appendix E JUMA TRX2 Filter board voltage table last update 2007 11 02 All values are typical DC voltages measures with a high ohmic gt 1M volt meter x in table means don t care Conditions Receive state Mode LSB f 3 7 MHz Filter WID AGC slow Speechproc OFF NB OFF MIC input dummy load The 5 volt in OPAMP table is a half of the 10 volt supply voltage e g if the 10 V supply is 10 2V the 10V is 10 2 and the 5 is 5 1 V Pint Pin2 Pin3 Pin4 5 Pin6 7 Pin8 5 5 5 0 5 5 5 10 A2 5 5 5 0 5 5 5 10 Pini Pin2 Pin3 Pin4 5 Pin6 8 9 Pin 10 Pin11 Pin 12 Pin 13 Pin 14 Pin 15 Pin 16 pict o O x 0 0 0 0 0 Oo 10 0 5 5 5 0 10 0 Troubleshooting Appendix JUMA TRX2 SPI bus signals OH2NLT 29 10 2007 SPI serial bus is used in JUMA TRX2 transceiver to transport several digital outputs from DDS control board to the main board and to the all band filter board Totally 16 bits are transmitted via SPI bus Eight bits are used in the m
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28. QNS 569 283 0801 045 341 I gt lt ATI Nd ZOOLNZ ddl I gt lt ATI Nd ZON9 ZOOLNZ NB4d1 gt lt ATI Nd Z N9 ZOOLNZ UJ gt lt ATI Nd Z N9 WZ 3d1 0 bal 66AVE 2 1 Avl Vd Avlt Vd Appendix Schematics LINZHO 2 1 8 0 39 02 e quiessD 9104219 5401 20 15 ees 9 au YO ar 75 22 01 o 0 AD 10029071 9 401140 2210A ON 2 8 8912 eer 19 04 sayDeds oj 301 Lny 22 Ly A8Z l 394A 990v2HYZ 1001 246511 213 264 301 Gy 1115 c5 JOA 1 93 99 MS pudg 0 vU 0 1 1041002 Lny AGL 4001 500159 93 2 02 0177 5072 105 819 i 6 400148122 199 159 ds ULY gg v indui 21 1 oo dS 1 8 m C 4 4 9 8 0 1 195 C 9 17 7 101 A 1 101140 200 r 04 500 1 v L 77 YOO B YOO YOO
29. TRX2 The latest firmware file can be downloaded from JUMA TRX2 site Connect the serial com cable between the PC and the JUMA TRX2 Boot Loader Appendix Note Before programming write down the Service Mode calibration parameters because they might be set to the factory deafaults depending on the extent of the new firmware Go to the Service mode to write down the parameters Switch off TRX2 Push and keep the PWR button down as long as the Service Mode is displayed in the LCD Write down each parameter in each service mode page by pushing the DISPLAY button Finally switch off the TRX2 Firmware programming instructions for GUI Version1 1 Close any terminal or other program which can reserve the PC com port Start the ingenia dsPIC bootloader in your PC and follow the instructions ingenia dsPIC bootloader ALERT message SHUT DOWN YOUR DSPIC PLATFORM BEFORE CONTINUE Wa gt ingenia dsPIC bootloader will nat work iF your platform is already started You will be noticed when your platform is required to start OK my platform is shut down owitch OFF the JUMA TRX2 dontremember me again ingenia dsPIC bootloader configuration 1 3 E _ X Serial Pork Select the communication port and the baud rate you want En use Then click the configuarktian done button E com Port Serial Park COM Baud Rate Configure the PC com port if nee
30. TRX2 speaker The JUMA TRX2 voice memory board also contains one led for debug purposes Led LD1 shows which command 15017240 has received and is executing This indication is useful information in case of troubleshooting Commands See JUMA TRX2 control software documentation for available control commands Circuit Descriptions External Keyboard Option 35 JUMA External Keyboard description OH2NLT 17 01 2008 General is a device intended to use with JUMA TRX2 voice memory option Keyboard hardware 1 limited to be used only with JUMA TRX2 or control JUMA TRX2 voice memory option JUMA KB1 operation depends on software loaded in to the keyboard microcontroller Operation The circuit is designed to consume so little power that whole keyboard can be powered from serial RS232 interface receive signal Receive signal idle state is about 9VDC and active state about 9VDC KB1 power supply is designed to utilize both polarity input voltages and produce about 4 5VDC regulated operating voltage for the microcontroller Microcontroller is a low power PIC16F628A clocked with 1 832MHz clock Microcontroller consumes about 700uA and rest of the circuit about the same amount of current Please see circuit diagram for details Software v1 01 for JUMA TRX2 voice memory control 10 buttons Shift are functional with this software version Populating the shift button SW11 is optional Five left side buttons transmits JUM
31. and its operation can be found from 15017240 data sheet and application notes found at URL http www winbondusa com en content view 160 290 In the control software 15017240 memory is divided into 10 sections One is about 120s long and others are shorter about 11s each Control functions for al the memories are the same In this application 15017240 chip is clocked for 8kHz audio sample rate The 8kHz sample rate is more than adequate for high quality SSB voice storage Operation The JUMA TRX2 voice memory board is powered from DDS board 5V regulated power supply The key component of the voice memory board is Winbond ISD17240 voice recorder chip The JUMA TRX2 dsPIC30F6014A controller the SPI bus controls the 15017240 chip Other components are CMOS switch and an operation amplifier With these components and an internal 15017240 features al required audio paths can be formed In normal operation The JUMA TRX2 RX audio is routed through 15017240 chip to audio amplifier 1502017240 internal microphone amplifier is connected in parallel with JUMA TRX2 microphone input to allow recording from the microphone Op amp and a CMOS switch is used to connect the JUMA TRX 2 RX signal to the JUMA TRX2 microphone input and override the microphone signal for RX recording The same audio path is also used to TX selected memory location play to the band 15017240 internal switches are used to break the audio path and play selected memory content to the JUMA
32. contrast and brightness Main display S meter MODE FILTER frequency VFO VFO step Alternate display pages RF output power SWR supply voltage PA drain current General configurable functions LCD contrast LCD brightness RS232 protocol select Service mode functions Frequency voltage meter S meter FWD REV power ID current calibration Acknowledge beep settings Factory settings restore Software updating HEX files can be uploaded by means of the boot loader via RS232 interface Supply Voltage 13 8 V 11 V 15 V Current TX 2 5 A typical RX 0 4 A typical depending on the LCD brightness Dimensions Width 182 mm height 60 mm depth 185 mm Weight 1 2 kg Specifications subject to change RECEIVER Sensitivity Typical 130 dBm IMD3 dynamic range Typical range more than 100 dB S Meter Graphical LCD bar display S9 50 uV range 51 59 40 dB 121 dBm 33 dBm Filters Three adjustable filters default bandwidths 2 3 kHz 1 7 kHz and 700 Hz Filters are independent of the transmit modes RIT Tuning range 1 kHz Separate RIT knob Image and IF rejection No image frequency response no IF frequency response baseband IF demodulation Configurable RX functions Slow fast AGC adjustable filters squelch function alternative function of the CW speed knob TRANSMITTER Output Power Nominal 10 W SSB transmit bandwidth Nominal 2 4 kHz CW Rise Fall Time Nominal 5 ms SSB carrier
33. filters The final stage is followed by the lowpass filters for 80 m and 40 m The corner frequencies are 4 MHz and 8 MHz correspondingly These lowpass filters are also in the signal path during reception to provide additional filtering The 80 m lowpass filters is implemented by using SMD inductors L1 and L2 and the 40 m filter is using two small iron powder toroids L3 and L4 The switching crossover frequency is 4 MHz The SWR bridge The SWR bridge is between the lowpass filter and the antenna The transformer T3 is sensing the output RF current and the transformer T4 is sensing the output RF voltage These signals are combined and rectified for relative forward and reverse voltages The DDS board calculates the forward RF power and the SWR which can be seen in LCD The SWR indication is calculated and displayed regardless of the transmit mode thus the SWR can be indicated also during SSB transmission T R switching and the bias supply The small MOSFETs 4 and TR5 are driving the antenna relay RL1 and the bias supply The bias supply voltage is regulated with the shunt regulator consisting of the reference diode Z1 and the diodes D2 and D3 The purpose of the diodes is to achieve a negative temperature compensation for the bias voltage DC supply input The DC supply for the TRX2 is coming via the PA board The supply input is protected with the fuse F1 and with the diode D10 against over current and reverse polarity Adjustments See t
34. keep the PWR button pressed until you see the text Service Mode on the LCD display Release the button Now you are in the Service Mode With the DISPLAY button you can walk through calibration menus With the FAST button you can save calibration values and exit to normal operating mode If you want to leave Service Mode without saving do a normal Power Off with the PWR button Set reference oscillator frequency When doing this calibration the JUMA TRX2 should be in its normal operating temperature Method 1 Measure the 30MHz reference oscillator output with a precision frequency counter Multiply the result by six AD9851 internal clock and dial this value in with the VFO knob For example If you measure 29 999 850Hz multiply this with 6 179 999 100Hz and dial this value in Default value is 180 000 000Hz Adjustments DDS Control Board 37 Power supply voltage meter Measure the JUMA TRX2 supply voltage with an accurate DVM With the VFO knob adjust the voltage reading on the LCD display as close to the DVM reading as possible The Calibration value is also shown on the LCD display Default Cal Mult calibration multiplier value is 132 Example display on JUMA TRX2 Supply 13 82 Cal mult 132 Indicator tones Beep length You can adjust the JUMA TRX2 user interface indicator tone length The long beep is always ten times longer than short If you dial in 0 zero no tones are played Maximum value is 100ms Default value is o
35. not present problems Mount foam pads to top cover to secure Polyphase board Two Band Board 16 Two Band PA Board Solder the ICs first to allow you more working room at the board surface then proceed to resistors and caps and finish with the taller components There are two toroidal coils to wind for this board Both coils are 17 turn on T25 2 cores 13 14 Core Amidon 25 2 red turns 0 4 mm enamel copper wire Additional instruction 1 Wind the coil SWR transformer modification 4 One plastic wall is now off 5 Break up the other plastic wall 6 Thread wire through the toroid Transformer mounting Two Band Board 17 Two Band PA Mosfet Installation d Bend legs as shown Use a small screw driver shaft to help form the curved bends Then mount the MOSFETs to the rear plate with the provided hardware as shown The set of holes next to the MOSFETs shown filled with screws and nuts are for mounting the All Band PA MOSFETs and are not used here Insert the provided screws and nuts to fill this hole 2 17 w 22 mh RI Solder the Power RF wiring Completed Two Band PA and Connector board Connector Board 18 Connector Board Fix the sockets to the rear panel before soldering to align with the plate Band PA Board 19 All Band PA Board Construction 15 similar to the Two Band PA Board
36. o Cec e titi 69 9 19 006 02 60 06 bny nuj 9290 Appendix D Board Layout 006 902020 lt 0 ONY 19 02902 suojjnq SOOO UMS 26 60 a e Bx 023 26 9 4 47 TINS 3 3 e 1 Keyboard Drawing Appendix D 128 14 0 gt lt 14 0 78 0 gt lt 14 0 gt lt 14 0 gt lt 16 6 4 countersunk holes D 3 5 mm 10 holes D 9 0 mm JUMA KB1 holes drawing Speaker Holes Drawing Appendix D ra 40 mm gt lt 22 4 speaker fixing holes diameter 3 5 _ 6 mm countersink Am BIN p on N x 2 XD Q A 2 8 16 voice holes 8 optional holes diameter 3 5 mm finish the edges TRX2 SPEAKER HOLES TOP VIEW 2008 01 26 OH7SV Troubleshooting Appendix JUMA TRX2 Main board voltage table last update 2008 02 07 All values are typical DC voltages measures with a high ohmic 21M volt meter in table means don t care Conditions Receive state Mode LSB f z 3 7 MHz Filter WID AGC slow Speechproc OFF NB OFF MIC input dummy load Pin8 Pint
37. suppression Typically better than 60 dB Speech processor Microphone audio processing with 6 dB oct high frequency pre emphasis CW offset sidetone Fixed 700 Hz MIC PTT Front stereo 3 5 mm jack mic connector with electret excitation tip PTT ring Ext PTT in rear panel aux Configurable TX functions Speech processor on off AF input mic line keyer Dot priority lambic A lambic B and straight OPTIONS TRX2 VM Voice Memory 10 memory banks Banks 1 9 Capacity 10 seconds each Bank 10 Capacity 120 seconds TRX2 KB1 External Keyboard TRX2 NB Noise Blanker Assembly Suggestions Using This Manual This manual uses a pictorial approach same as the Juma TRX2 web pages to aid the builder in constructing this radio The Part Lists provide an inventory check list and for some part lists if noted a logical order of assembly is suggested Please note the printed circuit boards PCB may be revised over time Be sure to note revision listing at the top of the Part Lists matches the PCB revision you are working with Updates and additional information not provided in this manual such as building tips and hi resolution pictures are available on the Juma TRX2 web pages at http fi 2 Assembly Suggestions Tools needed to assemble JUMA TRX2 Small side cutter small pliers medium size Phillips A temperature controlled anti static soldering iron or screwdriver and small to medium adjustable wrench soldering station wi
38. switches to the TX state The PTT signal is wired on the main board to the 5 volt via the R71 and it requires 1 mA sink current to operate The Key out can be used e g for a linear amplifier control The key output is implement by the open drain MOSFET TR10 capable of sink max 0 1 A current at max voltage of 50 V Note the key output can not be used in a negative voltage control The resistor and capacitor block marked LPF is passive lowpass filter for the sidetone and acknowledge tones coming from the DDS board The resistors R87 and R88 keep the DC level in the middle during tone breaks to achieve a smooth audio tone output Adjustments There are three trimmer resistors on the main board the AGC threshold R53 the SSB transmit gain R26 and the CW carrier level R28 See the instructions in the main board adjustment document Circuit Descriptions Two Band PA Board 31 Juma TRX 2 Two Band PA Board Description General The JUMA TRX2 two band PA board is a 10 W linear amplifier for 80 m and 40 m ham bands The board includes also the band pass RF filters PA lowpass filters and SWR bridge BRIDGE BAND SELECT TA SWITCH BIAS CONTROL EACITER 2 ID CURRENT FWD REV PWR JUMA TRX2 two band PA board block diagram The bandpass filters The band pass filters are used both in transmission and reception The filters are implemented using SMD inductors and capacitors and switched by the SMD relay RL3 The band
39. test the new firmware Boot Loader Appendix 3 Troubleshooting How to test the serial communication Start Hyperterminal or any other terminal program in your PC Configure the com port in use to 9600 8 N Connect RS232 cable to JUMA TRX2 Power up JUMA TRX2 normal power on start You should see following text at terminal screen JUMA TRX2 Firmware v1 02 Test release 230108 Copyright Juha Niinikoski OH2NLT system Clock 7500 kHz EEPROM checksums Cal 0 Def Cs 0 Factory default resets 1 TRX 2 voice memory option found 15017240 chip select RS232 Test from Juma TRX2 config pages Now you can try commands from terminal capital I should print the software version E capital e should dump JUMA TRX2 configuration EEPROM content Other commands See JUMA TRX2 user manual and software source code listing JUMA TRX2 boot loader software Normally you don t need to program the boot loader software because it is included in the TRX2 kit firmware You need to program the boot loader only if you have an empty dsPIC30F6014A chip The boot loader can be programmed into the dsPIC chip with Mplab ICD tool or equivalent programmer Boot loader code is based on Ingenia dsPIC bootloader firmware but modified for the JUMA TRX2 When programming an empty dsPIC30F6014A chip you should keep the PWR button pressed all the time or install Jumper J4 in the DDS board to keep power on during programming because the JUMA TRX2 power switch i
40. 0 R59 C44 05 R9 TRI 5 R60 1 1 9 47 CI R74 C 167 C70 R95 1 76 1 R70 L Os Appendix D irx2 filter Board Layout Appendix D C2 R3 5 R4 C16 R6 R5 19 1 11201 1 R2 C4 At R8 C9 R10 C10 R1 C17 qa 1000 00000 11 68 RO M RM TRX2 FILTER Rev B C15 R16 5 2007 020 02 00 e un Mar U4 Appendix D Board Layout e gt N e gt 2 lt gt e gt lt Qz lt gt TEASE AUD coque Iu JUMA TRX2 Rev A C23 051 i C32 od Bor E R16 ca Board Layout Appendix D OH7SV 2006 __13 R5 R23 821 E zt HEH Lap C16 C17 C15 15 i a TE m s nid c7 28 Appendix D Board Layout Qz x SANOHd LX jld vd zx 9006 5 0 V 7198 04908 05 XYL VAAL 66654 Board Layout Appendix D C3 gt 20 gt lt No 20 gt T 2 lt Appendix D Board Layout GY 60 109 22222559
41. 0 0 1 10 Multi turn SMD trimmer Bourns 3214W or 3214X or 3224W or nee 1093 3224X series or Vishay TSM4YJ TSM4AYL series C3 C8 C9 C10 C11 C43 C67 C78 C79 C81 C82 89 92 Ceramic size 1206 X7R Ceramic size 1206 X7R C1 C18 C20 C27 C30 C31 C32 C33 C37 C40 C48 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 C65 C66 C68 C69 C70 C72 C73 C74 C75 C77 C80 1901 C84 C85 C86 C87 Ceramic size 1206 X7R Ceramic size 1206 X7R Ceramic size 1206 COG Murata C4 C5 C6 C7 C12 C13 C14 C15 47 GRM31M5C1H473JA01D Farnell code 8820201 C22 C23 C24 C25 Ceramic size 1206 Y5V 10V Part Lists Main Board Appendix A JUMA TRX2 main board part list for PCB Rev B update 2007 12 04 Note REG2 91 2 Voltage 508 1 3 NC7S14 linverter Schmitt SOT23 5 Bus switch 5016 1 2 1 8 FST3253 Fairchild 3 OBS 74CBT3253 can not be used RF transformer POLYPHASETPOLYPHASE2 0000000 POLYPHASE2 POLYPHASETPOLYPHASE2 socket 1x10 E Snippet of Fisher BL5 36Z FILTER1 Header socket 1x6 Snippet of Tyco Electronics 5 826632 0 Farnell 3418560 Diameter 0 5 0 8mm Snippet of tinned copper wire Length 30 mm U jumper for measuring GND PCB JUMATRX2 PCB 000000000000 TRX2 Main board Rev B Total parts qantity fp Part Lists Filter Board Appendix JUMA
42. 0 5 2 0 for DC plug 9 mm shaft 1 8 BEN M3x6 Countersunk machine screw E g NETTLEFOLDS MS06030006081FA 28 mm 28 mm shaft 1 4 Front panel to DDS board and speaker fixing Front panel to enclosure profile fixing rear panel is fixed to Al profile with original Hammond pan head self tapping skrews NOA x 1 4 E g NETTLEFOLDS 4 420004025081FA Countersunk self tapping screw PA mosfets to rear panel two for extra holes and main board to Al profile fixing Pan head machine screw Pozidriv No1 Nylon washer M3 PA mosfets fixing or thin spring washer id Lis M3 x 12 PA board to rear panel fixing qmm Pozidriv No1 Part Lists Electromechanical Parts Appendix JUMA TRX2 Electromechanical part list update 2007 10 16 mf For main board fastening into Crimp terminal 1 0 2 6 mm2 18 6 4 the side Al profile See pictures For main board fastening into Square nut M3 4 the side Al profile See pictures 2 8 pitch 2 54 mm IDC socket 2 2x5 pitch 2 54 mm Ribbon cable length approx 200mm 1 16 pitch 0 05 Ribbon cable length approx 100mm 1 10 pitch 0 05 connector Crimp socket For internal speaker connector 250 mm 2 x 0 5mm2 Two pole cable Electret microphone Capsule e g C6 Switch PTT Closing contact Vero board 15 mm x 100 mm Mic cable For internal speaker c
43. 0ms S meter scaling o meter adjustment is a iterative process where main board AGC threshold trimmer R53 and S meter scaling values are adjusted to get correct and accurate S meter reading Please see main board adjustment procedure for details If necessary you can check DDS S meter board operation by applying 1VDC voltage to J3 pin8 S meter should read S9 with this voltage When this adjustment is done correctly your JUMA TRX2 S meter shows true S units and decibels FWD Power meter scaling With this adjustment you can fine tune the JUMA TRX2 output power display to show actual RF power output Connect accurate watt meter and dummy load to your JUMA TRX2 Select first TUNE mode and then PWR meter display Push PTT and read the JUMA TRX2 display and the external Watt meter Example External meter reads 9W and the JUMA meter reads 8W and the calibration value is 23 Divide 9 8 1 125 and correct the calibration value with this value The new calibration value 1 23 1 125 25 875 Go back into the Service Mode and dial in the new calibration value 26 Save this and recheck the readings Drain current ID meter scaling This adjustment is not necessary but if you like to check and calibrate your JUMA TRX2 PA ID current display do the following First go to normal operating TUNE mode and then select ID current display Push PTT read the JUMA TRX2 ID current display and with a DVM measure the voltage across drain resistors R17 R21 t
44. 214W or 3214X or 3224W or 20318 3224X series Vishay TSM4YJ or TSM4YL series Note Turn the trimmers initially to zero bias see instructions C14 C15 C16 C17 C29 9 5 Ceramic size 1206 COG 26 80p 1 size 1206 COG Ceramic size 1206 COG Ceramic size 1206 X7R or COG 2 Ceramic size 1206 COG Ceramic size 1206 X7R or COG 1 0 4 C10 C11 C12 C13 C30 31 820 C32 C33 C38 C39 C40 C41 1 GC 5 20 23 C2 5 N C1 C2 C4 C5 C6 C7 C8 C9 C18 C19 C21 C22 C25 C27 C28 C34 C42 C43 C44 100n C24 C35 C36 C37 4u7 16V Tantal SMD size B D1 D2 03 D4 D5 06 07 D8 BAV99 D9 LM4040 2 5 SOT 23 TRA TR 2N7002 Double diode SOT23 Voltage Reference 2 5V or LM385M3 2 5 SOT 23 MOSFET N type SOT23 or similasr Rds 10 ohm MOSFET P type SOT23 TRS 85584 similasr Rds lt 10 ohm Transistor NPN BCO46B or similar HFE 150 Diode 1A size melf Or similar 1A SMD diode 1 110 1 N type D PAK 1 010 O O N Part Lists Two Band PA Board Appendix JUMA TRX2 Two Band PA board part list for Rev A update 2007 12 04 install the parts in this order Part number Value type Qty Description Picture 8110 SMD inductor size 1210 1812 51719 SMD inductor size 1210 or 1812 SMD inductor size 1210 or 1812 TDK signal filter ZJYS51R5 M4PA or ZJYS51R5 M4PA 01 RF transformer
45. 4 098 Icy 824 692 Appendix D X SELECT B rag AU OH7SV 2007 JUMA TRX2 MAIN BOARD Rev c17 POLYPHAS J4 5 1110 11810 0 C69 R90 C49 R64 15 208 R31 Ue JE 08 10 C65 C94 R65 8109 N gt TR7 R68 TR8 897 R4 L 86911 R63 1 R78 073 R91 R34 C64 R98 R5 6 C66 654 C LJ c 60 C31 0 0 040 R43 2 REGI D4 5 1784 DOR Corel 1627 C81 R85 44 R35 FILTERI 9999996 99 gt C52 90 L R12 M 2 1 1 15 UUL 80 UU Li GND1 GND2 R55 C39 C40 1 074 R51 R94 48 49 TR6 c34 L C35 m 102 R42 C36 R27 R73 R72 POLYPHASE2 IC6 1 C91 R75 R77 68 R71 R21 071 R18 TL 1 R24 2 R25 R50 C87 C84 1 24 N Board Layout 43 R30 c92 96 c78 C89 C79 R88 87 1 R81 AGC 9 1 R57 58 67 L 1 C85 C43 0
46. 53 marked AGC on the board This adjustment sets the RX AGC operating point and the S meter reading Initially listen the RX noise without an antenna and turn the trimmer to the point where the noise begins to attenuate Fine adjustment is done by feeding a RF signal at S9 level 50 uV rms 73 dBm to the antenna connector with a RF signal generator Listen to the carrier at approx 1 kHz pitch and turn the AGC trimmer so that the graphical S meter reading in LCD indicates S9 two dots in the middle of the S meter bar If a signal generator is not available the fine adjustment can be done by listening to a suitable signal on a band and comparing the S meter reading to another RX 1 LSB MID UM M Graphical S meter reading 59 Notes for the Carrier gain and the SSB gain adjustments Note 1 The PA board bias currents must be adjusted before these adjustments Note 2 Connect a 50 ohm dummy load to the antenna connector Note 3 The simple dummy load made by the resistors included in the kit can stand 10 W only 1 minute Carrier gain trimmer R28 marked CAR on the board This adjustment sets the CW output power 1 Select Tune mode by pushing the MODE button 2 Select power output display PWR W by pushing the DISPLAY button 3 Press the mic PTT to transmit carrier 4 Turn the CAR trimmer until the RF output power reading indicates 10 W x 1 W SSB gain trimmer R26 marked SSB on the board This adjust
47. 60 or MOLEX 90131 0775 Farnell 9733680 Snippet of Tyco Electronics 5 826632 0 Farnell 3418560 or MOLEX 90131 0775 Farnell 9733680 e g snippet of Harwin M20 9992046 or MOLEX 90120 0784 Pitch 2 54 mm T 2 5A wired fuse e g WICKMANN 19396 2 5A Small ferrite bead outer diameter 3 5 mm inner diameter 1 3 mm length 4 8 mm or two shorter Signal filter SBT 0180W Farnell 9265791 Tinned copper wire Diameter 0 5 mm 0 8 mm MOSFET N type FULL PAK Bent the legs and fix to the rear 4 5 IRFI510G POR UMA TRX2 ALL BAND PCB RF transformer Farnell code 9621334 SMD Relay PIN HEADER 2 x8 PIN HEADER 2x5 Drain current selection jumper PCB miniature fuse Note another fuse is for spare Bend the legs for soldering RF choke inductance range 0 5uH 10uH wire through ferrite bead See pictures SWR transformer See the modication instructions For L7 T4 and T5 panel before soldering See instructions Part Lists RF Filter Board Appendix JUMA TRX2 RF Filter Board part list for PCB Rev A qum 2008 03 19 Install in this order Part number 1 Value type Oty Descripion ____ R8 OORT 4 resistor size 1206 1 84 R11 12 R13 R14 R15 R16 We R2R5 00000000 1010 3 SMD ceramic capacitor size 1206 COG 26 C28 C57 C59 C60 062 820p 6 12 C7C11C13 4n a
48. 76 The 5 volt from the regulator REG1 is used for all the logic circuits including the RX and TX demodulator muxers Circuit Descriptions Main Board 30 The functions of the main board are controlled by the shift register 106 The functions are Sideband selection 15 filter width AGC speed Speech processor ON OFF Noise blanker ON OFF option board AF input level mic line 80 m 40 m band selection in two band model change point frequency 4 MHz The shift register is driven by the DDS board with the serial SPI bus including data clock and latch signals The clock signal is filtered with R95 and C91 and squared with the Schmitt trigger inverter IC7 The SPI signals with the cascade output are fed to the second shift register in the RF filter board for RF bandpass and PA lowpass filter selection See more of the SPI principle in its own document The analog muxer is used to swap the and signals coming from the DDS board The order of the and Q signals defines the sideband LSB or USB The swapping is controlled by the shift register IC6 pin 1 The quad NAND 1 4 controls the transmit receive and the mode of operation by using the PTT and sideband input signals The AUX selector jumper block defines the rear panel AUX connector signals The alternatives are output or PTT in KEY out see schematics for the jumper positions The PTT input can be used e g for a foot switch PTT When the key input is grounded the rig
49. 9r B j L E 931 954 06 ZZN 123 in 42 ss YOU LI aL Gy e cul yy 10 18 629 123 068 29 19 00 a m e eZI seu 200 OO 1 nn PEs 72 28 0 00 006 1000 1 e e e 82 01 L 1 222 a Vd 994 275 11211 008811 0 0010 5888 98 1 ASLHO 1002 V Vd QNVB TV 1 22 60 189 cou 1 159 Uo Appendix D Board Layout ASSEMBLE TR4 TRS AND PCB TO THE REAR PANEL BEFORE SOLDERING Board Layout Appendix OH7SV 2007 gt ac ac L L gt lt 22 T lt gt gt 8 0560060856 88888888 1888 009099508 are ices 42 C40 Appendix D Board Layout JUMA TRX2 RF FILTER Rev A 0 5 2007 OPTIONAL FILTERS ON THIS SIDE C4 L2 L1 C2 C3 C7 L4 C8 C6 L7 ct 101 R3 182 TEST SPKR C14 Th AUG 92 20520 00 R4 RS Board Layout ct 11812 241111 ge N C8 2 R7 JUMA TRX2 Voice Memory Rev C OH2NLT 2007 Appendix D R13 C24 025 05 C1 Board Layout Appendix D C OH2NLT 2007 MX VOICE ocr Thu sug 2007 Appendix D Board Layout 9
50. A TRX2 voice memory commands Five right side buttons transmits numbers from 0 to 4 If shift button SW11 is installed and pressed right side buttons transmit numbers from 5 to 9 With external keyboard you can give all JUMA TRX2 voice memory commands except E erase all command Software source code is also available if you want to learn more about JUMA External Keyboard operation or modify it for your own needs JUMA KB1 Button functions M micrec 4 9 w shift RXrec 8 w shift play message 2 7 w shift T message 1 6 w shift o Stop 0 5 w shift Please see voice memory documentation for voice memory operation The KB1 option is new and just being released Here are some photos of the KB1 board and drawings of how it might look when completed See parts list for parts supplied j 4 Adjustments DDS Control Board 36 Adjustments JUMA TRX2 DDS Control Board Adjustments phase balance trimmer With trimmer R42 in the DDS board phase balance can be fine adjusted phase balance has direct influence to the unwanted sideband rejection Theoretically digital signals driving the mixer switch should be phased 90 degrees off each other Order of and Q signals which is leading selects LSB or USB This switching is done in the main board Practical circuits are not perfect and require phase balance fine tuning to get the best possible unwanted si
51. C14 C24 C34 C5 C15 C25 C35 C6 C16 C26 C36 Farnell 8820201 1x10 e g snippet of Tyco Electronics 5 826631 0 Angled pin header Farnell 3418479 1 pitch 2 54 mm or Molex 90121 0784 Farnell pin lenght 6 7 mm 9733566 FILTER Rev Total 50 JUMA TRX2 connector board part list for PCB Rev A update 2007 10 16 R1 R2 R3 R4 100R Resistor SMD size 1206 C1 C2 C3 04 C5 C7 aos or NPO 4 111213 gt 200 ohm 100 2 gt 200 mA 3 Ferrite bead SMD e g Murata BLM31B601S Case size 1206 2x5 Pin Header J1 e g snippet of Tyco Electronics 5 826632 0 Pin header 2 54 mm pitch pin lenghth 6 7 mm Pin header 2 54 mm pitch pin lenghth 6 7 mm 3 5 mm stereo jack socket Schurter 4832 2320 or 4832 232 Farnell 152204 1x2 Pin Header e g snippet of Tyco Electronics 5 826632 0 OBS Assemble into the the rear 1 2 4 panel during soldering to align the connectors mechanically 1 1 1 Part Lists Two Band PA Board Appendix JUMA TRX2 Two Band PA board part list for Rev A update 2007 12 04 install the parts in this order Value type Qty Description Picture _____ R17 R24 OR22 Resistor size 1206 0 5W e g Phycomp 235051912207 Farnell 8067600 1 Resistor size 1206 R5 R6 R11 R12 R13 R16 R29 100R R2 R20 __ R8 R15 R18 19 R22 R23 40k R24 R31 R9 R10 R14 R25 R26 R27 Multi turn SMD trimmer Bourns 7 10k 3
52. CONTRAST SLOPE fic 2 Hour 7 Troubleshooting Appendix E Example of bad SPI CLK signal Wrong too high value of capacitor C91 Trace SPI bus clock signal main board IC7 2 Trace main board 1 7 4 no signal Example of good SPI_ CLK signal Trace SPI bus clock signal main board IC7 2 Trace SPI bus clock signal main board IC7 IC6 11 Serial Protocol Appendix JUMA TRX2 serial protocol description OH2NLT 22 08 2007 JUMA TRX2 serial interface protocol can be selected from TRX2 user setup Long push of DISPLAY button gives setup menu for the user Short pushes of the DISPLAY button walks through various JUMA TRX2 setups Stop at RS232 xxxxx selection Now you can select desired serial protocol with VFO knob Long push of the DISPLAY button leaves the setup menu All the setup changes are immediately effective and stored to the EEPROM memory during next power off sequence In all serial protocol modes the default serial settings are 9600 8 n 1 Available JUMA TRX2 serial protocols JUMA TRX2 protocol JUMA TRX2 external keyboard protocol JUMA TRX2 test commands Yaesu CAT emulation Not yet defined and implemented in JUMA TRX2 software version 1 01 JUMA TRX2 external keyboard protocol This is simple one direction control protocol for JUMA TRX2 voice memory option control Commands can be sent to JUMA TRX2 with JUMA external keybo
53. FO button transfers the control immediately to the TRX2 normal control program 2 The PC side Graphics User Interface program The user interface program GUI is located in the PC and it transfers the firmware file from the hard disk to TRX2 via the serial port The PC side program GUI must be started before the JUMA TRX2 boot loader successful communications between the PC and the JUMA TRX2 is indicated on the PC screen The user can select a firmware file juma trx2 hex to load flash programming and start the programming cycle The preparations for programming a firmware Get a PC with the Windows XP operating system and with a RS232 serial com port 5 232 JUMA TRA2 RS 232 port MID DLE 35 mm plug connector Get a serial com cable with a D9 female connector JUMA TRX2 3 5mm jack plug Get Ingenia dsPICbootloader PC software by downloading it from here http www nikkemedia fi juma trx2 bootloader ingeniadsP Cbootloader1 1 zip Install the dsPICbootloader PC software IMPORTANT After installing the Ingenia bootloader into the PC you must replace the original file ibl dspiclist xml with this file ibl dspiclist xml Note This xml file is compatible only with the Ingenia bootloader version 1 1 The xml file is typically located in the hard disk folder C Program Files Ingenia ingeniadsPICbootloader Get a JUMA TRX2 firmware hex file juma trx2 Vxxx hex what you like to program into your JUMA
54. Farnell code 9621334 Wurth signal filter RF transformer SMD Relay type 744 205 NEC EB2 12V or Omron G6H 2F 12V or Nais TQ2SA 12V or Takamisawa AS12W K RL1 RL2 r SMD inductor size 2220 Snippet of Tyco Electronics 5 826632 0 Farnell 3418560 or MOLEX 90131 0775 Farnell 9733680 ee for spare e g WICKMANN 19396 2 5A PIN HEADER 2 8 Bend the legs to L shapes RF choke range 1uH 10uH wire through a ferrite bead See pictures Small ferrite bead e g Amidon FB FC 43 101 outer diameter 3 5 mm inne diameter 1 3 mm length 3 5 mm A SWR transformer Signal filter SBT 0180W See the modification Farnell 9265791 instructions 4 C2 Amidon 25 2 toroid core 17 turns 0 4 mm cu wire See the winding instruction 1uH 80 cm enamel copper wire for the toroidal inductors Enamel copper wire Diameter 0 4 mm AWG 26 or 27 MOSFET N type FULL PAK Fixed to the rear Alu panel See pictures for fixing IRFI520N PCB o 1 TRX2 PA PCB REV A Part Lists All Band Board Appendix Partnumber ty Deseription 0822 Resistor size 1206 0 5W 9 Phycomp 235051912207 ose Farnell 8067600 S lt _______ Resistor size 1206 1 or 5 me a o 2 ce n 910 913
55. JUMA TRX2 High Performance 160 10 Meter SSB CW Transceiver Owner s Manual Rev 2 6 5 March 21 2008 Designed by Juha Nunkoski OH2NLT and Matti Hohtola OH7SV Manual by Pete Meier WK8S Table of Contents INTRODUCTION ___46 _ __ 3 FEATURES MIL 3 SPECIFICATIONS 4 USING trees nies oes ARRA AUR 5 ASSEMBLY SUGGES TIONS 5 EE 1 Er R rr m 5 SMD CONSTRUCTION TIPS AND TECHNIQUES cc cccccscccscccccccscccsccusccsccusscsccscesscecceseeesccusccusccusceuseeacsesceesceaseeseescesecens 6 Tootliptekcand bee s Wax Method eoi ette 6 M AO 7 Dooms 8 7 Alternate methods of SMD construction ccccsccesccsccscccscosccnscscescesscnscascescesceseesscssenscescessesscescscescescessenscescescanses 8 DDS CONTROL DISPLAY BOARD 10 MAINBOARD 14 RR BOAR a 15
56. MODE button Select Drain Current display ID A by pushing the DISPLAY button Press the mic PTT to activate the bias current Turn the trimmer R15 clockwise until the LCD ID reading indicates 0 10 A 0 02 A Turn the trimmer R18 clockwise until the LCD ID reading indicates 0 20 A 0 02 inally leave the drain current selector jumper in to the PA position 1 1 1 TO 4 Final stage bias current reading 0 20 after the adjustment Adjustments Band PA Board 4 JUMA 2 Band PA Board Adjustments Last update 2008 01 12 5 11717434 JUMA TRX2 ALL BAND PA Rev 2007 0H7SV Equalizing the RF output each band On all band PA board there is an input attenuator 1 1 and related resistors which can be adjusted individually on each band to equalize the output RF power This can be done with the user interface 1 Go to the desired band 2 Select Tune mode by MODE button 3 Select PWR display by DISPLAY button 4 While pushing the mic PTT keep PWR button green down The LCD will show the current output power and the gain in decibels e g 1 dB 5 Turn the VFO knob until the LCD shows desired output RF power approx 10W 6 Release the PTT and PWR buttons This PA gain setting is saved individually at all 9 ham bands to the non volatile memory when you switch OFF the TRX2A
57. NOO 01 Qq4VO8 Vd OL Schematics Appendix CW FILTER 300 2 1 2 470n 470n REF E REF IC1 74HC4052 470n 470n 1k2 17 REF 10V 1 2N7002 R18 100n 00 100 100k 1 1 NOTET ALL OPAMPS 111115 PIN4 GND PIN8 10 AND GND 16 10v NOTE2 INPUT MUST BE DRIVEN FROM LOW IMPEDANCE SOURCE NOTES OUTPUT MUST BE AC COUPLED TO NEXT STAGE LOAD 20kohm Drawn Arch Serial Sheet Cooperator s 2007 05 08 75 fig no doc no Review JUMA TRX2 TRANSCEIVER 59 SSB CW FILTER MODULE Replaces CIRCUIT DIAGRAM ur a 5 Replaces Replaced NOTE ALL CAPACITORS 47n COG NPO OH7SV 2006 12 08 OH7SV Scale 5 C31 222 C33 47n 47n 47n R31 R32 R33 OO 820 1k5 2k7 C21 C22 C23 47n 47n 47n R21 R22 R23 820 1k5 2k7 11 12 13 47 47 47 11 R12 R13 820 1k5 2k7 C1 C2 C3 47n 47n 47n R1 R2 R3 820 1k5 2k7 Schematics Appendix 1 7 1 8 1 9 1 10 MATCH UP RESISTORS AND CAPACITORS EACH COLUMN BELOW 1 TO GET AN EXCELLENT SIDEBAND SUPRESSION ABSOLUTE COMPONENT VALUES ARE NOT CRITICAL Arch id POLYPHASE NETWORK CIRCUIT DIAGRAM Serial sheet Cooperator s no doc no JUMA TIRX2 HF TRANSCEIVER 0 ui
58. OS hex inverter schmit CD40106 trigger SO14 Part Lists External Keyboard Option Appendix JUMA KB1 external keyboard partlist Rev C OH2NLT 2008 02 29 1 8432MHz Xtal 3 5 mm stereo jack socket Schurter 4832 2320 or 4832 232 Farnell 152204 IC1 socket 18 pin DIP IC socket flexible pins See pictures ITT Cannon D6R50LFS Push Button Switch Green ITT Cannon D6R40LFS Push Button Switch Red SW1 SW2 SW3 SW5 SW6 SW7 SW8 SW10 ITT Cannon D6R10LFS Enclosure 12 NO R 2 Case with Farnell code 495 3654 Optional rubber boot BOX Enclosures 40 RBT LBL Protective Boot w Integrated not icluded in the kit tilt bar Farnell code 495 3710 Countersunk machine x 20 4 Board to box fixing UMA KB PCB Rev C Total Qty 71 Part Lists Electromechanical Parts Appendix JUMA TRX2 Electromechanical part list update 2007 10 16 Qty Description Enclosure Hammond 1402D Front panel Al 1 5 mm natural anodized Al 1 5 mm natural anodized DC PWR connector JST LR 02 2V 1 DC socket Male crimp pins JST 0 5 2 0 2 DC socket DC PWR connector JST LP 02 1V Housing Original front and rear pltes are not used Milled and silk printed JUMA TRX2 front panel Milled and silk printed panel JUMA TRX2 rear panel TRENT a nut mount type with solder lug DC plug Female crimp sockets JST
59. TRX2 filter board part list for Rev B update 2007 10 16 Value type Qty Resistor SMD 1 R1 R8 470R size 1206 R12 620R N O O O A 21212 ZU 2 13 21 19 2 N O 2 N gt N N 5 5 R10 a O1 2 O O O 5 5 UJ OLA LTA 13 14 R6 7 ow Cc ow OLA Ceramic SMD capacitor size 1206 COG size 1206 COG size 1206 COG size 1206 X7R size 1206 X7R C11 417 C6 C13 100 Tantal SMD capacitor 15 100u 10V more size D MOSFET N type SOT 23 R1 2N7002 or similar Rds lt 10 ohm 1 2 171113 2 4052 or Philips 74HC4052 Opamp J FET low noise SO 8 C1 CMOS multiplexer SO16 1 x 6 pin header e g snippet of Tyco Electronics 5 826631 0 Farnell 3418479 or Molex 90121 0784 Farnell 9733566 CB JUMA TRX2 filter PCB Rev B Total Qty 46 Angled pin header pitch 2 54 mm pin lenght 6 7 mm 1 i v Part Lists Polyphase Board Connector Board Appendix JUMA TRX2 polyphase board part list for PCB Rev A update 2007 10 16 pcs 820R 1 Resistor SMD size 1206 R2R12R22R32 ___ _ 44022 23 833270 1 4 2 5K10 1 gt 9K10 1 16 0 1 4 C1 C11 C21 C31 MURATA GRM31M5C1H473JA01D 24 Ceramic SMD size 1206 C4
60. TTONS POTENTIO Power Siu METERS DDS BOARD Lm eme uem uu Ga cm a V V X i ee DR Block diagram of the 2 exciter the board and the DDS board section Refer to the main board schematics page 1 The antenna RF signal without any RF amplification goes directly to the wide band transformer 1 to achieve good dynamic range The transformer T1 transforms the unbalanced 50 ohm antenna signal into the 200 ohm balanced signal This signal 15 fed to the doubly balanced demodulator RX mixer 1 1 which 15 a high speed low ohmic analog multiplexer controlled by dual local oscillator signals which are shifted by 90 degrees These local oscillator signals are coming from the DDS board The demodulator 1 is sampling the antenna signal into the four sampling capacitors C4 C5 C6 C7 The signals in these capacitors are in baseband frequency range i e lt 15 KHz and all the capacitors have equal signal content but the phase of these four signals are different which are
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63. X driver amplifies A10 and A11 The gain of these TX drivers are set precisely to equal each other by using 0 1 feedback resistors R16 R17 R18 R21 R22 R23 The and signals are fed to the SSB modulator IC2 TX mixer which is a high speed low ohmic analog multiplexer controlled by dual local oscillator signals which are shifted by 90 degrees The output of the modulator is SSB RF signal on the local oscillator frequency at the nominal level of 6 dBm 4 mW The other half of the TX mixer IC2 is used for the CW modulator It generates carrier on the local oscillator frequency The carrier level is defined by the constant DC current generator TR1 The constant DC current level and thus the CW drive is defined by the trimmer resistor R28 The keying envelope is defined by the capacitor C19 with the reflected RF impedance of 100 ohms Nominal rise fall time is 5 ms The CW rise and fall times can be customized by changing the value of the capacitor C19 if desired Control section Refer to the main board schematics page 3 The control section includes the power ON OFF switch and the voltage regulators for 10 V and 5 V The Power ON OFF MOSFET switch TR7 is controlled by the DDS board via the MOSFET 8 The rare 13 8 V is used directly for the speaker amplifier The 10 volt from the low drop regulator REG2 is used for all the OPAMPS and the reference midpoint 5 V is made by the resistor divider R83 and R58 and filtered with the capacitor C
64. a convection oven and solder paste Pros It s fast and clean with reduced chances of parts being lost in the carpet Cons If not done correctly irreversible damage to both pc board and components can be done Electric beverage warmer coffee cup heater and Solder Paste http www zianet com erg SMT_Soldering html This method utilizes the same technique as the Convection Oven but uses safer lower temperatures Pros It fast with reduced chance of board or component damage lower heat Cons Still possible to damage pc board and components and requires additional purchase of a hot air embossing tool for secondary heating to complete solder flow Pictorial example of right and wrong application of this hot air amp solder paste technique http www zianet com erg Kisses and Pies html Hot Air Re Work Station and solder paste Using a hot air re work station 1s another relatively inexpensive approach similar to the above techniques The method is the same but you work with fewer components at a time It is more like normal soldering except you use solder paste instead of solder wire hot air instead of a hot iron and need only one hand The benefit of this method is you work at your own pace do one or more components at a time and take breaks whenever because the hot air tool heats up about 30 seconds Hot Air Re Work Stations can be found starting under 100 on eBay and elsewhere Step 1 Place a small amount of solder paste on the
65. able With 1n cap solderd in the terminals For PTT use in simple mic For simple mic mechanics DC power cable Red black 2 wires shield 1 meter Two pole cable 1 5 m 2 x 1 5mm2 Optional parts F Solder 3 pcs 150 ohm resistors parallel for 50 ohm dummy load Do not use wire wound resistors Power resistors for a 150 ohm 2W e g metal oxide dummy load resistor Appendix Schematics 002 0706 Aes L INCHO Jd ZHWOZ dzz 819 GE Rh 11 8 v u00l Ew 629 5 2 8 88 AWI 001 wie 8 2 21 ACE 001 LTA 023 4001 013 4 6 LINOA NIA 908 SUOI ONI SU eas 905 jD8H YA 10H 310 ZA 310H LA Ul Jeppou 5141 11 2 0 2809 4094 500 42 41 5 9 500 S 931 764 10454 jou oq 4309 ON uondo s 514 4920 9 19 114 ZHWG 114 42012 s 921 oso 015 JO ejpjndog 250 AG 98 04 aspyd Ajuo ZHW 0 O89ZOAIVZNS 08929A 1r LNS 41110 22A HEN 4001 4001 ino
66. ain board IC6 74HC595 shift register latch is used to receive and drive main board control signals If all band RF filter board is present there is another 74HC595 shift register for the filter board control signals See schematics and functional description for actual control output usage JUMA TRX2 SPI bus is active only when some output state changes This way SPI bus generated interference can be minimized Changing MODE or tuning very fast across whole coverage is the easiest way to generate SPI traffic for bus measurement purpose Another way to generate continuous SPI traffic is via test commands Set TRX 2 serial mode to test RS232 Test Give command c lower case c from terminal Response to the terminal should be SPI Tx cont Test can be interrupted with any key Some typical SPI bus waveforms for reference purpose e 7 Trace A SPI bus latch signal LATCH DDS board 2222 12411 Trace SPI bus clock signal DDS board J2 8 T 8 UA hn MOVE lt Trig AT Bz d UA TRIGGERT COHTRAST SLUPE 4 1 usn EN LF HOTRIG EN S l mga u Trace detail view of 1 46us wide LATCH signal Itis rather difficult to see without memory oscilloscope 101010100 ed obs onda c s cl M
67. amel copper wire copper wire copper wire Additional instruction 1 Wind the coil see details above hot iron soldering Cabinet Final Assembly 21 Cabinet and Final Assembly You may need to drill and countersink the necessary holes for the speaker including four 4 counter sink holes for mounting the speaker Refer to the Speaker Holes Drawing at end of Appendix D Tip Proceed slow and careful when drilling the speaker holes to prevent scratching or chipping the top cover paint A hand countersink tool can be use to finish the holes nicely You may need to drill countersink holes for the cabinet side rails for mounting the front panel which uses flat head screws into countersunk holes sit forthe front panel Crimp the power wire leads to terminals Insert the terminals into the connectors until they lock in place The red positive power wire terminal goes into the squared barrel side of the connectors Flat Cable Dimensions 22 JUMA TRX2 Flat Cables with Dimensions 10 9 07 Measure and carefully cut ribbon cables to length before crimping the end connectors Note the position of the end connectors some are on opposite sides of the cable 10 pole cable MAIN to CONNECTOR cable DDS to MAIN cable Fold the MAIN to CONNECTOR cable The base flat cables for all Juma TRX2 models mm 1 pcs 16 pole cable MAIN to two band PA cable Two band cable note the connec
68. an detect the power switch push button state PWR SW signal The push button also activates FET switch directly This function is needed to get board power on and software running When the software is running the power FET switch is kept on with the power on digital output signal PWR ON The power on signal is also connected to the main board to operate power switches there When the user has decided to turn the JUMA TRX2 off software executes the power down tasks and then removes power on signal PWR ON LCD display 2 by16 character LCD module is used to implement the JUMA TRX2 user interface display A few special fonts are loaded into the LCD display s RAM character generator to allow graphic S meter display The LCD module power feed is filtered with a simple RC filter to reduce RF noise Contrast and backlight adjustment The LCD module contrast voltage and LED backlight current are generated with a PWM type DAC PWM DAC s are formed with software dsPIC30F6014A PWM outputs and few other components the RC filter and buffer amplifier IC3A for the contrast voltage and the RC filter and current generator IC11A and Q3 for the LCD back light Typical control voltage value is about 0 5V Back light current can be adjusted from 0 to about 100mA Normal value is between 20 to 50mA Circuit Descriptions DDS Control Board 25 Push button switches User interface push button switches SW1 to SW6 are connected to dsPIC30F6014A digital input
69. ard or a PC program If voice memory option card is not installed these commands have no effect Response messages are echoed to serial interface for debug purposes This feature is useful if PC with a terminal program is connected to the JUMA TRX2 serial interface Voice memory action is also showed on the JUMA TRX2 LCD display First a command is selected and then a memory location number where the action is addressed Available commands capital letters Actions and their definitions Selects play mode Stored message is played from JUMA TRX2 speaker Selects transmit mode Stored message is transmitted with current TX settings Selects record mode Audio with current RX settings is recorded stored to selected memory location Selects record from microphone mode Audio from JUMA TRX2 microphone is recorded stored to selected memory location Stops current action immediately Play TX and record commands can be stopped with this command before EOM end of the memory is reached Erase all This command is not normally used Erase all command deletes all messages and removes all EOM markers m o Memory numbers 0109 After an action is selected a memory number that can be from 0 to 9 defines the voice memory location and starts selected action Examples Record message from microphone to memory location 1 Select M for microphone input Select 1 for memory 1 and start recording Press to stop recording Play message from memo
70. component pads or a bead of paste across an IC s set of pads See http www zianet com erg Kisses and Pies html for details on correct method Step 2 Place component onto into paste on top the pads Don t worry about aligning the component perfectly close 15 good enough The components will magically align themselves when the heated air 1s applied Step 3 Hold the hot air tool centered over the top of component at about 2 inches or a little less with the air stream flowing straight downward for about 3 seconds Watch as the component wiggles into perfect alignment and the solder flows Step 4 Inspect your work If a misalignment occurs or you need to change remove a part simply re heat the part while using a tool to grab and move it Be very careful to keep your fingers out of the hot air stream 8 Assembly Suggestions Parts Inventory and Identification As in any project you need to gather your parts and inventory them Since the parts in this kit are so small you will need the aid of a magnifying lens or jeweler s loop a good light source and parts list found in this manual The kit s parts will arrive packed in marked bags TRAD componen CONNECTOR BOARD Resistors 3 POR Capacitors au In Ferrite bead SMD Jx O00 1 OOM hz 2 0 WRT ADEA Tip Keep the components their marked bags until you are ready to install them Some bags will contain different type of components that will be identified by
71. convert and print all analog inputs Do A D conversion for all analog inputs and print raw conversion result values E dump EEPROM content Dump EEPROM contents Dump contains stored user defaults and calibration constants C clear EEPROM factory default reset counter JUMA TRX2 software keeps track how many factory default resets have occurred This counter is shown printed to the serial interface on every start up This counter can be reset to zero with this command W writes from PC terminal to JUMA TRX2 LCD display Write characters from PC terminal to the JUMA TRX2 LCD display W command is useful help to test LCD compatibility and general operation Test loop can be stopped with Esc character B LCD bar graph test Runs bar graph display up and down on the JUMA TRX2 LCD display This test verifies LCD display module soft font compatibility Any character from PC terminal will stop the test loop mute audio stop SCAF filter clocking Mute JUMA TRX2 audio Stopping JUMA TRX2 main board SCAF filter clocks generates mute S audio on start SCAF filter clocking Restart JUMA TRX2 main board SCAF filter clocks Opens the audio path p print CW speed pot amp S meter A D conversion values Print CW speed potentiometer value and S meter value d prints some internal VFO select logic values Print some internal variables used in VFO select logic prints reference oscillator calibration value Print DDS reference oscillator calibration value Nominal value i
72. deband attenuation phase balance adjustment is simple Select your favorite operating band and feed a 9 50uV CW signal to the antenna connector Switch to the other sideband The signal should disappear Adjust R42 to find minimum value You may perform this check adjustment also with other frequencies bands Adjustment is not exactly the same for all frequencies and you have to compromise for which best suits your listening needs balance also affects TX unwanted sideband rejection It is enough to do this adjustment with the RX but if you wish you can check TX sideband rejection with a dummy load and another receiver Software adjustments calibrations There are several adjustments or calibrations done in the DDS board control software Calibration values are stored in the dsPIC30F6014A microcontroller non volatile memory EEPROM In the very first startup when the EEPROM memory is empty default values are written to the EEPROM These default values so close that you can operate the JUMA TRX2 without doing any calibration adjustments If you like to fine tune your JUMA TRX2 continue reading Calibration adjustments possible Set reference oscillator frequency Power supply voltage meter Indicator tones Beep length S meter scaling FWD Power meter scaling Drain current ID meter scaling Return to the factory default values Selecting Service Mode do the calibrations When powering on the JUMA TRX2
73. ded Normally the default baud rate of 115200 works fine but you can select a lower speed if needed When ready with the com settings click configuration done button ingenia dsPIC bootloader detection 2 3 x r dsPIC detection Plug your dsPIC platform the selected COM and start it Wait For dsPIC detection Now the PC software is waiting the JUMA TRX2 Flash Writer to be started Start up power on JUMA TRX2 while keeping VFO button pressed You should see the text below in the JUMA TRX2 LCD display JUMA TRX2 Flash writer started Boot Loader Appendix G amp ingenia dsPIC bootloader loading and writing 3 3 juma trz2 hex 3 x Load amp Write 34 93 401 98 45 1 n ge n info ingenia cat com Load your HEX File Select WIAA ingenia cak com software version 1 1 the appropiate writing options and skart the write e firmware version 1 1 process idsPIC bootloader started 23 26 07 TOES 1 load HEX File 23 26 14 write process started 23 26 24 ok spsn HEHE 3 Flash write Finished 23 26 30 ok 4 azPIC write process comp 23 26 30 The Following checked options have program flash been detected into the HEX IF you don t wank bo write them into dsPIC uncheck therm prior to start ie eed ties OM writing operation
74. der the Mic connector to the plate mounting nut FE Y adii Mount the front plate and tighten the MIC connector to the plate Also tighten the encoder mounting nut Before tightening the nut check the lock washer thickness that the encoder fits perfectly between the board and the front panel When necessary uninstall the tooth washer and bang it slightly to a suitable thickness Remember the flattened lock washer goes behind the front plate Now you can solder the MIC connector and encoder Regulator mounting E U forming the legs makes them flexible This helps when fixing the regulator to the aluminium frame Flexible legs also makes the soldering joints to last longer under thermal stress I E 4 4 4 Regulator soldered Ready for the final assembly p 4 4 gt 1 X 9 Prepare the power regulator for mounting as shown here bend legs in a U shape Solder as shown Knob mounting Congratulations on fine work Ready for the first test The construction time N of this part was about 4 hours 30 minutes P us zi UEFESTI TW C When installing the potentiometer amp knobs put paper between the plate and the knob This way you can control the spacing gt When installing the po
75. e the picture next page Note The trimmers are multiturn models When turning the trimmers the bias current is notincreasing in the beginning Continue turning until you see an increase of the reading and then fine tune the bias current Typical trimmer position is approximately in the middle Set the drain current selector jumper J7 shown next page on the board in to the DRV position Switch ON the power Current limited power supply recommended Select CW mode by pushing the MODE button Select Drain Current display ID A by pushing the DISPLAY button Press the mic PTT to activate the bias current Turn the trimmer clockwise until the LCD ID reading indicates 0 03 0 01 Turn the trimmer R9 clockwise until the LCD ID reading indicates 0 06 A 0 01 A IE 5 n 5 Driver stage bias current reading 0 06 A after the adjustment Final stage bias adjustment See the picture next page Note The trimmers are multi turn models When turning the trimmers the bias current is not increasing in the beginning Continue turning until you see an increase of the reading and then fine tune the bias current Typical trimmer position is approximately in the middle Set the drain current selector jumper J7 shown next page on the board in to the PA position Switch ON the power Current limited power supply recommended Select CW mode by pushing the
76. ee schematics for details DDS LO The Analog Devices AD9851 DDS chip is used for LO frequency generation The JUMA TRX2 commutating mixer needs four different states quadrants per one LO cycle AD9851 DDS digital output is 2 LO frequency AD9851 output and output complement signals are used to clock IC7A and IC7B flip flops Flip flops are connected so that output is a quadrature signal I Q for the RX and TX mixers In the main board analog switch IC8 is used to select the order of LO A and LO B signals going to the mixers Order of the LO signals selects the desired sideband Circuit Descriptions DDS Control Board 27 DDS LO continued The AD9851 DDS chip is clocked with 30MHz reference oscillator Reference clock frequency is multiplied by six to get the required 180MHz internal clock rate for the DDS chip The DDS chip is controlled by the JUMA TRX2 control software via the serial bus For details see software source code and Analog Devices AD9851 data sheet Analog Devices have also published very good application notes and DDS tutorials in their www pages 30MHz Reference oscillator A good quality crystal oscillator is needed for the 30MHz reference frequency generation Most important parameter is the phase noise of the oscillator This is important because frequency and also errors are multiplied by a factor of 6 inside the DDS chip Frequency accuracy is not so important because it can be corrected with the JUMA TRX2 calibration
77. g 10203040608 6 2 5 C9 C10 C14 C15 C19 C20 C24 C9 C10 C14 C15 C19 C20 sat C25 C29 C30 C34 C35 C39 C40 C41 C42 C43 C44 C45 C47 C48 100n 24 Ceramic size 1206 X7R C49 C50 52 C55 C58 C61 C64 C67 C70 C55 C58 C61 C64 C67 C70 Not assembled C76 C79 1 SMD inductor size 1210 8250 0 2 Part Lists RF Filter Board Appendix JUMA TRX2 RF Filter Board part list for Rev A update 2008 03 19 Install in this order Part number Value type Qty Description _____ 01 02 03 04 05 99 Double diode SOT23 2 TR4TR5 2 7002 similasr Rds lt 10 ohm 122 FST3253 Fairchild Bus switch SO16 1 010 decodersot6 10 decoder 1 010 decodersot6 UD2 12NU or Panasonic AGQ200A12 SMD Relay Snippet of Tyco Electronics 5 826632 0 Farnell 3418560 or MOLEX 90131 0775 Farnell 9733680 Snippet of Tyco Electronics 5 826632 0 Farnell 3418560 or MOLEX 90131 0775 Farnell Mui REE 9733680 L32 L33 250 See the instructions 9turns diameter 0 4mm cu Amidon T25 2 iron __ T25 2 iron pwder pwder core Enamel copper wire Diameter 0 4 mm AWG 26 or 27 r we PCB UMA 2 FILTER Part Lists Voice Memory Option Appendix JUMA TRX2 voice memory part list for PCB Rev C update 2008 02 29 R5 OORT 1 Resistor SMD size 0805
78. he separate two band PA board adjustment instruction document it includes important notes to avoid excessive MOSFET drain current and the fuse blow 2 Circuit Descriptions Polyphase Board Filter Board 33 JUMA TRX2 Polyphase Board description In the JUMA TRX2 there are two identical polyphase modules Both of these plug in modules are plugged into the main board One module is in the RX section and the other is in the TX section The purpose of the polyphase modules is to suppress the unwanted side band in the direct conversion method by means of phase shift There are no adjustable parts In the RX section the polyphase is fed by quadrature Q audio signals with the complement signals coming from the QSD muxer The phases of these four fed signals are 0 90 180 and 270 degrees The Q signal is delayed by 90 degrees from the signal After summing the signals the unwanted side band 1 in opposite 180 degree phase and thus suppressed Correspondingly in the TX section the singe phase audio COLUMNS signal is split into the and the complement signals These signals are fed to the commutating TX muxer which provides a SSB signal There adjustments to the polyphase module The unwanted side band suppression is optimized for 300 Hz 3 kHz range by simulation The absolute values of the components are not critical but the performance of the polyphase depends on the deviation of the components in each col
79. ing is to decide on your construction technique Consideration must be given as to how you will control the small components as some are the size of a freckle or mole on the back of your hand Toothpick and Bee s Wax Method I have successfully used bee s wax and a wooden toothpick for several SMD projects The principal here 15 to flatten the point of the toothpick then add a very tiny piece of bee s wax to the end to pick up and hold components Here are the steps 1 Tin the pc board pad s where you will be working Important use very little solder 2 Pick up the component using the waxed end of the toothpick and place it on the pad 3 Hold the component down with the toothpick and solder tack one side or leg of it 4 The component should now be stable so put the toothpick aside and solder the other side 5 Now return to the first side and re solder if necessary Tip For ICs use the above technique but solder tack the opposite corner pins before setting the toothpick aside and soldering the remaining pins Tip For non ESD soldering irons the tip must be grounded to the pcb using the technique shown here This will help avoid causing internal breakup of MOS devices 6 Assembly Suggestions 7 Tweezer Method 1 Pre solder one pad very lightly 2 Hold with tweezers and melt solder again 4 5 E mI ge 7 do JUMA TRX2 PA Rev A 2 RS JUMA TRX2 PA Rev A L7 L8 023 C31
80. ively all the operations can be activated by keyboard small or caps MIC record M RX record R Play P Transmit Stop 5 1 2 3 4 5 6 7 8 9 0 Updating the Voice Memory Windows software version Uninstall any older version of the software by using Windows Add Remove Programs in Control Panel Install the new version by running setup of the new version Part Lists DDS Control Board Appendix Appendix A Parts Lists JUMA TRX2 DDS board part list for PCB Rev B update 2007 12 04 Value type Qty Descripiion J R31 R32 2 SMD size 1206 R45 R102 R38 R4 R5 R6 R7 R12 R8 100R Resistor SMD 196 0805 R10 R15 200R 2 Resistor SMD 196 0805 R19 R20 R29 3 Resistor SMD 1 0805 139 1 SMD 1 0805 R23 R33 2 Resistor SMD 1 0805 R46 6k8 1 Resistor SMD 1 0805 R28 R16 R25 R51 R11 R3 R34 R60 R61 R62 R63 R64 R65 R52 R35 10k 21 Resistor SMD 1 0805 R48 R36 R37 R47 R26 R53 R27 R55 2 Resistor SMD 1 0805 R17 R18 R13 R14 R39 o R41 R43 R66 R67 100k Resistor SMD 1 0805 470k 1 Resistor SMD 1 0805 Multi turn SMD side adjust R42 100k trimmer resitor Bourns 3214J 3224J series 1 Ceramic 0805 Ceramic 0805 COG Ceramic 0805 C17 C18 Ceramic 0805 COG C7 C19 Ceramic 0805 C30 100p Ceramic 0805 COG C28 C5 C13 C26 4 Ceramic 0805 X7R or COG C66 C44 C43 C42 C41 C48 C6 C62 C49 C50 C51 C52
81. measurements Tips A few things to which the builder must pay attention Note in the picture above on right the DDS power regulator mounts to the Main board solder lug C22 and C23 are the larger 1206 size caps and positioned close together so use caution when installing so they do not short together Use caution when soldering the trimmer resistors at R26 R28 and R56 Do not use a hot air tool with these The plastic bodies of these pots will not tolerate a stream of hot air from a rework station for long Always keep the solder time short when installing the pin headers and sockets to avoid damaging their plastic Visual Inspection Carefully inspect your work for any missed solder joints or solder bridges using a bright light under magnification If all looks well proceed to the next board Filter Board amp Polyphase Board 15 Filter Board Construction of this board is not difficult and with fewer parts to solder Proceed slowly and inspect your work as you go Tips Here are some cautions for builders This board use two sets of 100n 0 1uF capacitors which are different types Don t mix them The parts bags are marked clearly but the builder may need to pay close attention to avoid mistakes C3 C5 C10 C12 are COG type and are physically thicker The second set is X7R type as the bag identifies them They are used for C16 C17 C18 C19 C20 Polyphase Boards These boards are also simple to construct and should
82. ment sets the SSB output power 1 Select LSB or USB mode by pushing the MODE button 2 Select power output display PWR W by pushing the DISPLAY button 3 Press the mic PTT and vocalize aaaaaa at a distance of 1 inch from the microphone 4 Turn the SSB trimmer until the RF output power reading indicates 10 W x1 W En 22 IE Power output reading 10 watts Adjustments Two Band PA Board 39 JUMA TRX2 Two Band PA Board Adjustments two band model Last update 2007 10 14 OH7SV There are two adjustable trimmer resistors R4 and R7 on the two band PA board All the measurements during the adjustment is done by using the LCD current display These trimmers define the bias current of the power amplifier MOSFETs The bias current is 0 10 A per MOSFET totally 0 20 A Important notes before the adjustments to avoid excessive MOSFET drain current and the fuse blow Keep the supply power OFF Initially turn the trimmers R4 and R7 fully counter clockwise for zero bias Double check the zero bias by measuring the resistance across C5 and the reading should be below 10 ohms MN 75 2006 cr uL Im iN Te Bias adjustments trimmers R4 and R7 Note The trimmers are multi turn models When turning the trimmers the bias current is not increasing in the beginning Continue turning until you see an increase of the reading and then fi
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84. ne tune the bias current Typical trimmer position is approximately in the middle 1 Switch ON the power Current limited power supply recommended 2 Select CW mode by pushing the MODE button 3 Select Drain Current display ID A by pushing the DISPLAY button 4 Press the mic PTT to activate the PA bias current 5 Turn the trimmer R4 clockwise until the LCD ID reading indicates 0 10 A 0 02 6 Turn the trimmer R7clockwise until the LCD ID reading indicates 0 20 A 0 02 S The bias current reading 0 20 A after the adjustment Adjustments Band Board 40 JUMA TRX2 Band Board Adjustments Last update 2008 01 12 OH7SV There are four adjustable trimmer resistors 9 R15 R18 on the all band PA board These trimmers define the bias current of the driver and power amplifier MOSFETs All the measurements during the adjustment is done by using the LCD current display The driver stage bias current is 2 x 0 03 A totally 0 06A and the final stage bias current is 2 x 0 10 A totally 0 20 A Important notes before the adjustments to avoid excessive MOSFET drain current and the fuse blow Keep the supply power OFF Initially turn the trimmers R6 R9 R15 and R18 fully counter clockwise for zero bias Double check the zero bias by measuring the resistance across C5 C7 C12 and C14 the reading should be below 10 ohms Driver stage bias current adjustment Se
85. ning the of the variable gain amplifier Signal for the S meter is processed from the AGC control voltage by the DC amplifier A7 Nominal S meter output voltage is 1 V with a S9 50uV signal and 2 V with a 9 40 dB signal The threshold of the is defined by the trimmer resistor The adjustment can be done by means of a 50uV 9 antenna signal and by turning the trimmer R53 until the S meter reading is 1 V S9 reading is in the middle in graphical LCD bar marked with two dots The output audio level of the variable gain amplifier A4 B is regulated to the range of 5 mV 10 mV which is amplified by the post amplifier 5 to a suitable 200 mV 500 mV level for the Switched Capacitor Filter SCAF IC10 The SCAF is a variable 8th Order Elliptic lowpass filter The corner frequency is defined by the clock frequency coming from the CPU in the DDS board Thus the final RX selectivity can be set by the user The output from the SCAF is fed to the AF GAIN potentiometer located in the DDS board and fed back the speaker amplifier A12 in the main board The CW sidetone and the acknowledge tones coming from the DDS board are summed to the AF signal in the post amplifier by the resistor R52 Additionally there are buffer amplifiers A13 A and A13 B the and signals at a bandwidth of 15 kHz This signal is available in the rear panel AUX connector by selecting corresponding AUX select jumper positions The output can be
86. ol board are provide user interface functions with LCD display buttons and potentiometers generate user interface tones and CW side tone provide LO frequency to the JUMA TRX2 main board provide clock frequency to main board SCAF filters measure analog input signals from main and PA board and read and process VFO encoder provide digital control signals for main and PA board control provide RS232 serial interface to external equipment provide CW keyer functions Key components of the DDS control board are dsPIC30F6014A microcontroller 216 character LCD display high resolution optical encoder pushbutton switches potentiometers AD9851 DDS chip 30MHz reference oscillator and RS232 driver chip These components and over 3000 lines of software code stored in dsPIC30F6014A Flash memory form JUMA TRX2 control unit Voltage requlator power switch Main operating voltage of the DDS control board is 5VDC The 5V is generated from the power feed about 14VDC with the linear regulator The linear regulator s benefit is low noise emission Less wanted characteristics are poor efficiency and high heat dissipation In the JUMA TRX2 the DDS board 5VDC regulator is mounted to the enclosure s aluminum frame to ensure maximum heat dispersion Power on is implemented with push button FET switch and software This combination enables us to use power switch button in multiple ways see operating instructions Software c
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88. pass filters and the next stages A1 B A2 B are additional active lowpass filters The 6 dB rolloff frequencies are 300 Hz for the highpass and 1000 Hz 2700 Hz lowpass respectively Circuit Descriptions Voice Memory Option Board 34 JUMA TRX2 Voice memory option OH2NLT 22 08 2007 Function The voice memory option is a JUMA TRX2 plug in module which includes audio record and playback functions can record from the microphone or from the receiver Playback can be sent to the band or to the local speaker Purpose The voice memory option can be used to transmit pre recorded voice messages e g in contest operation or in other similar situations Recorded voice from the receiver can be listened afterwards via local speaker or the message can be transmitted back to the air Record playback control The record playback and transmit functions can be controlled by means of the JUMA TRX2 KB external keyboard option or by means of the Windows software Compatibility Win 9x 2k XP or higher The license for the OH7SV Windows software is granted when purchasing the voice memory option kit Memory capacity 10 memory banks Banks 1 9 Capacity 10 seconds each Bank 10 Capacity 120 seconds General Voice Memory option for the JUMA TRX2 is an add on board The board can be attached behind the JUMA TRX DDS control board The key component of the voice memory board is the ISD17240 voice recorder chip Detailed description of the 15017240 chip
89. peration instructions and software source code for details UART 2 is connected to pin header J1 and reserved for future use Option board connectors Behind the DDS board there are connectors pin headers J5 J8 and J7 These connectors are for various option boards Connector J5 provides access to microphone line input circuit Connector J8 provides access to the audio out path If no option board is installed there should be jumper between J8 1 and J8 2 connecting RX audio to AF gain potentiometer Connector J7 provides digital I O control and supplies power to the option board For future use the dsPIC30F6014A DCI interface codec interface is also wired to J7 Connector J19 ICD2 connector is for the Microchip ICD2 debugger programmer ICD2 is needed if there is no on board flasher available or if it is corrupted See the Microchip www pages for details Circuit Descriptions Board 28 JUMA TRX2 Main Board 11 25 07 General JUMA TRX2 is using the quadrature sampling technique for demodulation and modulation with the low noise phasing method The main board handles all the RF and AF exciter functions for reception and transmission Analog measurements from board Power SWR ID Voltage 14 VD C feed from RF IN OUT moms 050 RX demo dulator QSD TX SSB mo dulator PTT 30 MHz Reference os cillator 0 30 MHz RS232 FRONT FRONT Ci PADDLE BU
90. rvice calibration mode Reference oscillator software calibration Acknowledge tones length setting S meter software scaling Reload factory settings FWD power meter software scaling Firmware Power supply The most recent software updates will be Nominal supply voltage 13 8 VDC range 11 available and users can easily upgrade the VDC 15 VDC firmware without any special tools with the Nominal supply current RX 0 4 A TX 2 5 A build in flasher utility and a PC serial cable The control software firmware is written in Dimensions the C programming language Source code Width 182 mm Height 60 mm Depth 185 mm will be available for experimenters JUMA TRX2 and JUMA TRX2A SPECIFICATIONS 2007 10 28 GENERAL Frequency range Two Band model TRX2 RX 2 MHz 8 MHz TX 2 MHz 8 MHz Frequency range All Band model TRX2A RX 100 kHz 30 MHz TX 1 8 MHz 30 MHz Tuning step sizes 10 Hz 100 Hz 10 kHz very fast setting Modes LSB USB CW VFOs A and B VFOs with split function one tuning knob Front panel connector Jack stereo connector 3 5 mm for electret mic input or line level input selectable by the CONFIC and PTT Rear panel connectors Phones speaker output CW paddle key keyer input RS 232 AUX for PTT in KEY out or audio output All connectors 3 5 mm stereo jack type sockets Antenna connection BNC connector in the rear panel nominal impedance 50 ohms Display Blue white LCD with adjustable
91. ry location 1 Press P to play Select 1 for memory 1 and start playback Playback stops when whole message is played Playback action can also be stopped with S command JUMA TRX2 test commands Various different test commands are provided for JUMA TRX2 hardware functionality testing These commands are not needed or used during normal JUMA TRX2 operation Test commands are good help in troubleshooting Below is a very brief description of available commands User should see program source code listing for particular command functional details Commands are single letter commands given from PC terminal Please note that small and capital letters are different commands Available commands JUMA TRX2 software v1 01 Serial Protocol Appendix F info SW version etc A convert and print all analog inputs E dump EEPROM content C clear EEPROM factory default reset counter W writes from PC terminal to JUMA TRX2 LCD display B LCD bar graph test mute audio stop SCAF filter clocking S audio on start SCAF filter clocking p print CW speed pot amp S meter A D conversion values d print some internal VFO select logic values print reference oscillator calibration value m print internal timing ms counter value t write test data to SPI bus c continous test data write to SPI bus increase multiband PA RF attenuator value decrease multiband PA RF attenuator value f print SPI bus control data Z intentional divide by zero CPU error trap test A
92. s All of these inputs are kept high 1 with pull up resistors When a switch is pressed input state goes low 0 The push button functions are defined in the software logic VFO encoder High resolution optical encoder is mounted to the DDS board The main usage of this encoder is VFO tuning The encoder is also used in various user interfaces configuration functions The encoder generates two logic level signals which are quadrature phased Phasing allows software to detect the direction of rotation Both encoder signals are connected to dsPIC30F6014A interrupt pins Encoder processing is done in software with interrupts to get smooth and reliable operation even when encoder is rotated in high speed Analog inputs Seven analog signals are measured with dsPIC30F6014A A D converter The A D converters reference voltage is derived directly from AVDD 5V supply The DDS board voltage regulator is a generic 7805 part However good quality parts should be used here to maintain analog measurement accuracy The DDS boards 5V supply voltage should be 5V 0 05V or better Signal descriptions Potentiometer Two front panel potentiometers CW SPEED and RIT are directly connected to dsPIC30F6014A analog inputs With this arrangement software can read potentiometer positions in numeric format FWD PWR and REW PWR The PA board contains SWR bridge power peak detectors and a buffer amplifier Amplifier outputs are scaled so 10W are about 2
93. s 180000000Hz m print internal timing ms counter value Print internal 1ms tick counter value Can be used to verify JUMA TRX2 software timing t writes test data to SPI bus Write once 0x5501 test data to the SPI bus This command can be used to verify SPI bus I O functions in the main board and multiband PA board c continuous test data write to bus Same as t command but writes continuously increasing test data word to the SPI bus Test loop can be stopped with sending any character from PC terminal increase multiband PA RF attenuator value decreace multiband PA RF attenuator value Increase or decrease multiband PA board RF attenuator value f print bus control data Print current SPI bus control data Data correspond current main board and multi band PA SPI I O state Z intentional divide by zero CPU error trap test Performs intentional divide by zero that causes CPU error trap Command is used to test error trap logic Yaesu CAT emulation Serial Protocol Appendix F Some Yaesu CAT control protocol commands are implemented in the JUMA TRX2 software There is no exact 1 1 match in JUMA TRX2 functionality and the original Yaesu FT897 CAT specification Essential commands such as set frequency read frequency read s meter set mode etc are implemented Implementation of these essential commands allows JUMA TRX2 to be controlled by rig control programs Particular rig control program must be set to Yaesu FT897 control mode Implemen
94. s software controlled Some tips for your own firmware If you are compiling your own firmware for JUMA TRX2 special linking loader script for Microchip C30 compiler should be used There must always be a jump to the user code start at absolute program memory address 0 100 text CODE BASE extra 0 06 Joader 05010 Boot loader allways jump to start address 0 100 n SGHORT ABSOBLUTE reset SHORT 0x04 SHORT ABSOLUTE eset 22 16 SHORT 012 handle 11620 libm libdsp keep together in this order Poe pLogram For more details see the provided JUMA TRX2 source code and Mplab project files Alternative programming method You can also program the JUMA TRX2 firmware with Microchip ICD 2 tool or other programmer without the boot loader However if you do this the boot loader is erased from dsPIC30F6014A flash memory and it must be reprogrammed if needed later For the initial loads a special hex file is available including both the boot loader and the firmware See TRX2 technical page
95. setup Good thermal stability is however required There two decals places in the DDS printed circuit board for 30MHz oscillators One is for the surface mount version and another the through hole version This makes easier to find good oscillator components Of course only one is populated here DsPIC30F60144 is also clocked with this reference oscillator The current software version operates with a 30MHz clock The 30MHz frequency is connected to the micro controller via OR jumper R54 For future use there is the possibility to install a flip flop IC6 and get 7 5MHz external clock rate for the dsPIC30F6014A micro controller This low frequency clock is needed if the dsPIC30F6014A internal PLL is used for clock frequency generation With internal PLL the 120MHz clock rate can be produced This is needed if software performs heavy DSP operations Mic line input Microphone input is designed so that a electrete microphone can be directly connected into it Microphone input can also accept other kinds of signal source Input sensitivity level can be controlled with software Microphone input is a 3 5mm stereo jack The tip is the microphone and the Ring is the PTT signal RS232 interface DsPIC30F6014A UARTs are buffered with RS232 transceiver IC10 UART 1 is connected via the main board and connector board to the JUMA TRX2 back plane This RS232 can be used for PC Terminal connection or for the JUMA External keyboard connection See o
96. stickers that include both the corresponding marking codes such as resistors or semiconductors and their values 1k5 1501 or 4k7 4701 BAV99 A7 or 2 7002 702 It s important to understand the markings on the components e g A7 may differ from kit to kit This happens because different manufacturers use different marking codes and we may substitute a component with a compatible one from a different maker Regardless the code printed on the part s sticker will be valid for each kit Hint Using the Part Lists with 1ts component pictures along with the bag stickers will help identify the uncommon and or smaller unmarked parts such as capacitors and inductors Problems Most problems will occur because of poor soldering opens or shorts across pads wrong component installed or the component was placed improperly wrong polarity TIPS TO AVOID MISTAKES Go slow and be systematic when soldering Visually identify each component under good light and magnification and ensure its proper placement e g polarity Mark off the parts list for each component when you have completed its installation and visual check 9 DDS Control Display Board 10 DDS Control Display Board You may wish to begin solder work with the microprocessor and DDS chips This will allow you more room to work at board level and it will be easier to inspect your work up close after soldering Then proceed with resistors capacitors induc
97. switching crossover frequency is 4 MHz and it is controlled with the MOSFET TR7 with 7M signal coming from the DDS board See the circuit diagram BPF FILTERS TRX2 RF FLTERS CR 10 002 10 090 200002 30 090 40000 50002 9713 151 D s i XC 100K 1M 104 1009 do v 39mi6 02 22 6 02 Simulated response of the bandpass filters Blue for 80 m red for 40 m Circuit Descriptions Two Band Board 32 The driver and the final amplifier The input of the driver MOSFET 1 is terminated with a 51 ohm resistor The single ended driver operates in class A with the nominal bias current 130 mA which is regulated with NPN transistor TR6 The resistor R3 and the capacitor C3 in the source of the driver MOSFET are used to equalize the RF gain in both of the bands The RF transformer T1 converts the driver output to the balanced signal which is feeding the final amplifier MOSFETs TR2 and in push pull configuration The nominal output power is 10 watts The final stage bias current nominal 100 mA per MOSFET is adjusted by the trimmers R4 and R7 The resistors R17 and R21 in the sources of the final MOSFETs are used to sense the drain current The voltage is across the sense resistor is proportional to the drain current The sense voltage is amplified with the DC amplifier A2 A and fed to the AD converter in the DDS board thus the drain current can be monitored with the LCD The lowpass
98. ted Yaesu CAT commands 0x03 Read RX frequency and mode 7 Read RX status S meter OxF7 Read TX status 0x02 Set split on 0x82 Set split off 0x81 Toggle VFO select 0x07 Set operating mode bits 0x01 Set operating frequency 0x08 PTT on 0x88 PTT off 0x00 VFO lock on 0x88 VFO lock off For more details see JUMA TRX2 software source code and Yaesu CAT specification Boot Loader Appendix G JUMA TRX2 Boot loader OH2NLT amp OH7SV last update 26 01 2008 General The boot loader allows a user to update the JUMA TRX2 firmware into the dsPIC30F6014A flash memory without any special tools The firmware is programmed through the RS232 serial port Only a PC with a serial com port serial com cable and the PC software is needed How it operates The boot loader is two part program 1 The client part The client part is a piece of software programmed into the JUMA TRX2 control processor to the top part memory of the dsPIC30F6014A The firmware coming with the JUMA TRX2 kit includes this client part Every time the JUMA TRX2 is powered on the boot loader checks if the VFO button is held down during the start up This VFO button pressing is the signal for the boot loader to start the procedure The message is written into the TRX2 LCD display and the boot loader starts to negotiate with the PC connection If the connection is not established within few seconds the boot loader starts the normal control program A start without pressing the V
99. tentiometer knobs use a piece of paper between the plate and the knob This is an easy way to control spacing so the knobs rotate freely DDS Control Display Board Regulator chassis mounting L3 a c i r 1 8 ET 8 m EST v b AUDIO an JUMPER ex H If the Voice Memory option is not installed place a jumper into the pin header J8 use pins 1 2 gu 5 Do not install the jumper J4 for the normal use It is intended for the bootloader and test purposes If the jumper J4 is installed you can not switch OFF TRX2 with the PWR button DDS Control Display Board 13 Suggested MIC wiring ELECTRET ame E SHIELD o E SWITCH CABLE 4 Board There are a lot of parts to solder on the Main Board You may prefer to begin with the ICs first to allow you more working room at the board surface then proceed to resistors and caps and finish with the taller components This board is not too densely populated which will make it easier to construct Below are pictures of how you will mount the main board in the case Note the crimp terminals are soldered to the board ground pads where holes are provided for them Typically the crimp terminals will fit nicely through the holes so they are just flush with the bottom of the pcb Mounting Main Board to side rails Ground Jumper for test
100. th a small to medium tip 4 Small to medium diameter 0 2 0 5 mm solder wire with no clean type flux Lead free solder wire is ok but is not as easy to use as the conventional wire Small straight or curved tweezers used for SMD Digital multimeter with at least voltage current and Assembly resistance ranges Capacitance measuring 1 a nice to have feature Solder wick e g width 1 5 3mm for removing possible tin short circuits solder paths between Also consider using small containers such as empty pads and component legs butter containers or muffin pans to hold and organize the parts for each section as you build Simple loop or forehead loop to see the details during soldering the SMD components 5 Assembly Suggestions SMD Construction Tips and Techniques Most hobbyists cannot afford the expensive tools and soldering equipment professionals use for Surface Mount Device SMD construction Thankfully many low cost alternatives exist Here we offer just a few SMD components can be extremely small and difficult to handle Therefore it is important you take into consideration your workspace It needs to be well lighted I suggest if possible you obtain a natural or full spectrum lamp which provides better color definition useful for such fine work This type of lighting is sometimes called Tru light such as the Ott Lite brand and can be obtained at hobby or craft stores The next most important th
101. tor positions MAIN to RF FILTER cable RF FILTER te all band PA cable 1 RF FILTER ta all band PA cable 2 All band cables note the connector positions Operation 23 Operation PWR ON VFO LOCK Multi function LCD LSB USB TUNE VID MID NAR us Ei at Long push PWR OFF See tne description ong pu poc P i MODE FILTER T e KEYER SPEED f Kn DELAY in straight mode CW SPEED SQUELCH in 50 mode DISPLAY AF GAIN 49 T connector m i 1 With short push DISPLAY pages Audio volume RIT ON OFF RIT tune amp 1kHz MAIN PWR SWR VOLTAGE CURRENT ________ With long push to CONFIG pages AGC speed FILTER adjust Nose Speech processor AF in select Keyer type select LOD brightness LCD contrast R5237 protocol pot function OH2NLT 7 2007 VFO SLOW FAST Long push Very FAST Main Display view Shown here are some of the information the TRX2 LCD can S meter Rel PWR Mode Filter display Frequency VFO use Tuning speed Middle Filter engaged in LSB mode RIT engaged with Wide Filter Circuit Descriptions DDS Control Board 24 Circuit Descriptions JUMA TRX2 DDS Control Board General Key functions of the JUMA TRX2 DDS Contr
102. tors transistors ICs and finish with the taller components Shown here are some hints to working with the DDS Board microprocessor Begin by placing a tiny amount of liquid flux or flux compound over the pads to help hold the chip in place and to allow the solder to flow Do not use any force on the soldering tip to the chips pins 6 412 A PASTE FLUX NC IA Solder the chip Use enough solder and heat to flow solder Don t use force Pushing the legs by iron may break the foils Don t worry about shorted legs yet Remove excess solder with solder wick Note Don t use It is recommended to wash any force away the the flux in the chip area after soldering with a PCB cleaner or isopropanol alcohol The next step would be to wash away the excess flux using a solvent such as a good grade PCB cleaner or isopropanol alcohol Use enough solvent to remove all residue Use enough cleaning solvent to remove the flux residue Carefully inspect your work under magnification and good lighting after the cleaning If you have to do corrections apply flux to the area that needs re soldering or solder removal Make all possible corrections before you install Oscillator IC5 and pin header J19 Next you begin the install of the various switches pushbuttons and DDS board connectors DDS Control Display Board 11 DDS Control Display Board Push buttons mounting
103. umn within the circuit The design is done so that when using the specified components the unwanted side band attenuation is very good better than 50 dB The deviation comes mainly from the capacitor the resistors are the more accurate 1 type The performance can be optimized if desired to a superb level 60 dB 70 dB screening close values of the components in each column TRX 2 Filter Board Description General The 2 filter board is plug in module on the main board It i 5 low noise wide dynamic range filter T used as the 1 bandpass filter in the RX audio path The gain is 0 dB total noise is 3 V rms and the maximum signal is 3 Vrms thus the dynamic range is 120 dB The filter board includes two filters the wider for SSB and the narrow for the CW The final selectivity in the JUMA TRX2 is defined by the post SCAF filter which is user adjustable 10V NAR AF OUT JUMA TRX2 filter board block diagram The circuit description See the filter board schematics There are two similar circuits on the board one for the wider filter and the other for the narrow filter Only the component values are different in these two filters The two filter inputs are driven in parallel and the output is selected by means of the analog muxer IC1 This selection is controlled by the NAR signal The first filter stages A1 A A2 A act as combined active highpass low
104. used for a software demodulation by feeding the signals to PC via a sound card input TX section Refer to the main board schematics page 2 The AF signal from the microphone is fed to the amplifier A8 A which acts also as user switch selectable speech processor The mic input is designed for an electret type microphone with a direct two wire connection The electret bias is fed by the resistors R62 and R61 If a dynamic microphone is preferred the bias should eliminated by adding a 470 nF capacitor in series with the dynamic microphone hot wire The speech processor is using a soft clipping to form a logarithmic type of compressor When the processor is engaged the high frequency pre emphasis is magnified which will emphasize high tones to get a more penetrating SSB transmission The mic input can be switched to the line signal level mode for e g digt mode reception The line signal level can be matched to the audio source e g sound card by changing the value of the resistor R82 The audio signal from the mic amplifier is filtered by the highpass filter A8 B at 300 Hz and by the SCAF lowpass filter IC9 at 2 6 kHz Then the signal is split into the differential signals by the amplifiers A9 A and A9 B The gain of the SSB drive is adjusted by the trimmer resistor R26 Then the audio signal is the fed to the TX polyphase module which splits the signal in to the two phases and and their complements The and Q signals are buffered by the T
105. ution 120CPR SW 10 Optical Rotary Encoder SW1 SW2 5 3 SW4 SW5 SW6 ITT Cannon D6R10LFS Push Button Switch lt W7 ITT Cannon D6R50LFS Push Button Switch L 12 mm e g Ettinger 05 13 123 or 05 13 121 For DDS board installation into the front panel OBS Fix into the the front panel before soldering Spacer screw or Harwin R30 3001202 Tooth lock washer C2 Q iN 3 5 mm stereo jack socket Lumberg KBL4 or Schurter 4832 2300 7805 TO220 IC4 Voltage regulator Enclosure Al profile as heat sink Phillips pan head For 7805 regulator mounting JUMA TRX2 dds Rev B Total 182 Or a snippet of rack nut list for 4 7805 regulator mounting Part Lists Main Board Appendix A JUMA TRX2 main board part list for PCB Rev B update 2007 12 04 Partnumber Valuw type __ Description resistor 1 size 1206 R45 R78 R89 R94 R97 R98 R99 R100 R106 R107 jf00R Jof R19 R20 R24 R25 R104 068 5 MZOR 11 R44 R46 R55R61R95 5 R ___ ___ _______ _ 114 ee eS eee R39 R54 R58 R68 R6I R70 R72 R73 R74 R79 80 R83 RS e t S R36 R92 R93 RS 4 4 R75 R76 R77 R81 90 91 lt ____________ R38 R52 R59 R63 R82 MYOK 5 RB HM __________ R4 R7 R8 R16 R17 R18 R21 R22 R23 2 7
106. wo band model or resistor 23 24 all band model on the PA board All band board jumper J7 should be in the PA position Calculate the actual drain current from the voltage U R If you measured 0 209v divide it with the R17or R21 value 0 209V 0 11R 1 9A Go to the Service Mode again and if necessary correct the ID scaling Cal mult calibration multiplier value This value is used to scale the voltage over drain resistors to drain current This procedure is the same as in the power meter scaling See also the PA board tuning instructions and particularly the bias current adjustments Return to the factory default values In case you want to return to factory default values select on the LCD display Push FAST long Factory defaults Press the FAST button for about five seconds a long press Adjustments Main Board 38 JUMA TRX2 Main Board Adjustments Last update 2007 Initially check the voltages on the main board with multimeter at a suitable DC voltage range Connect the negative test lead to the GND jumper located on the main board 1 Measure the supply voltage at capacitor C65 Nominal 13 8 V Allowable variation is 12 V 15 V 2 Measure the nominal 5 V regulator voltage at capacitor C63 Allowable variation is 4 8 V 5 2 V 3 Measure the nominal 10 V regulator voltage at capacitor C64 Allowable variation is 9 5 V 10 5 V There are three adjustable trimmer resistors on the main board AGC threshold trimmer R

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