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Tait TB9100 Service Manual

Manual is about: Base Station, Console Gateway, Trunked Analog Gateway

Summary of TB9100

  • Page 1

    Tb9100 base station reciter service manual mba-00017-01 issue 1 january 2006.

  • Page 2: Tait Contact Information

    2 tb9100 reciter service manual © tait electronics limited january 2006 tait contact information tait radio communications corporate head office tait electronics ltd p.O. Box 1645 christchurch new zealand for the address and telephone number of regional offices, refer to the taitworld website: websi...

  • Page 3: Contents

    Tb9100 reciter service manual 3 © tait electronics limited january 2006 contents preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 scope of manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

  • Page 4

    4 tb9100 reciter service manual © tait electronics limited january 2006 5.5 i/o buffers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 5.6 ethernet interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

  • Page 5: Preface

    Tb9100 reciter service manual 5 © tait electronics limited january 2006 preface scope of manual welcome to the tb9100 reciter service manual. This manual provides servicing information for the tb9100 reciter. All other tb9100 base station servicing information is the same as the information provided...

  • Page 6: Terminology

    6 tb9100 reciter service manual © tait electronics limited january 2006 terminology to align with the powerpc documentation, this document uses the term “word” to refer to a 32-bit number; a 16-bit number is referred to as a “half- word”. This convention is continued through the sections in this doc...

  • Page 7: Publication Record

    Tb9100 reciter service manual 7 © tait electronics limited january 2006 technical notes are published from time to time to describe applications for tait products, to provide technical details not included in manuals, and to offer solutions for any problems that arise. All available tb9100 product d...

  • Page 8

    8 tb9100 reciter service manual © tait electronics limited january 2006 brg baud rate generator bs refers specifically to the reciter control element of the base station cpm communications processor module, a risc processor dedicated to handling communications interfaces csma/cd carrier sense multip...

  • Page 9

    Tb9100 reciter service manual 9 © tait electronics limited january 2006 harvard architecture a type of computer architecture that utilizes separate memory spaces for executable code and data. Cf. Von neumann architecture hw hardware i 2 c inter-integrated circuit, a serial communications interface m...

  • Page 10

    10 tb9100 reciter service manual © tait electronics limited january 2006 pcmcia personal computer memory card international association pcm highway a tdm bus typically used for interconnecting codecs and dsps phy ethernet physical interface pit periodic interrupt timer pll phase-locked loop powerpc™...

  • Page 11

    Tb9100 reciter service manual 11 © tait electronics limited january 2006 software when ‘software’ is not otherwise qualified, it refers to the asif software that is the subject of this document spi serial peripheral interface, a simple serial communications interface mainly used for i/o expansion on...

  • Page 12

    12 tb9100 reciter service manual © tait electronics limited january 2006.

  • Page 13: Replacing The Network Board

    Tb9100 reciter service manual replacing the network board 13 © tait electronics limited january 2006 1 replacing the network board this section describes how to troubleshoot and replace a faulty reciter network board. Servicing procedures for the reciter digital board and the reciter rf board are co...

  • Page 14: 1.2

    14 replacing the network board tb9100 reciter service manual © tait electronics limited january 2006 ■ power cable, pmu to reciter ■ ethernet switch or hub (if available) 1.2 troubleshooting before replacing the network board, carry out the following tests on the reciter to exclude other causes and ...

  • Page 15: 1.3

    Tb9100 reciter service manual replacing the network board 15 © tait electronics limited january 2006 assistance with re-loading the kernel and application software. E. Note down the reciter’s ip address that is displayed at the login prompt and close the session. 4. Connect the pc to the network boa...

  • Page 16: 1.4

    16 replacing the network board tb9100 reciter service manual © tait electronics limited january 2006 1.4 removing the faulty board 1. Remove the m3 torx screws securing the cover on the digital side of the reciter. Lift off the cover. (the digital side is nearest to the 9-way d and rj45 connectors.)...

  • Page 17

    Tb9100 reciter service manual replacing the network board 17 © tait electronics limited january 2006 3. Replace the eight m3 torx screws and tighten them to the correct torque. Important do not exceed 4.5in-lbs of torque; greater torque settings may damage the pcb. Inadequately tight screws can affe...

  • Page 18: 1.6

    18 replacing the network board tb9100 reciter service manual © tait electronics limited january 2006 1.6 restoring the configuration 1. Connect the css to the reciter using the correct ip address (network boards are given the ip address 192.168.1.2 in the factory.) 2. Restore the base station’s conf...

  • Page 19

    Tb9100 reciter service manual reciter circuit descriptions 19 © tait electronics limited january 2006 2 reciter circuit descriptions this chapter describes the circuitry used in vhf and uhf reciters. Much of this circuitry is common to both frequency bands, and is therefore covered by a single descr...

  • Page 20

    20 reciter circuit descriptions tb9100 reciter service manual © tait electronics limited january 2006 figure 2.1 reciter high level block diagram dsp codec codec codec 40mhz clock receiver exciter synthesizer subsystem reference frequency subsystem digital receiver power supply power supply risc dsp...

  • Page 21: Digital Circuitry

    Tb9100 reciter service manual digital circuitry 21 © tait electronics limited january 2006 3 digital circuitry refer to figure 3.1 on page 24 . 3.1 digital if 3.1.1 vhf reciter the heart of the digital if system is the 14-bit analog-to-digital converter (adc). This is a high-speed device, with a mul...

  • Page 22: 3.2

    22 digital circuitry tb9100 reciter service manual © tait electronics limited january 2006 the digital downconverter (ddc) digitally downconverts the desired image (9.9 mhz) to baseband. This is achieved by digital mixing with a numerically controlled oscillator (nco). The mixing process is done usi...

  • Page 23

    Tb9100 reciter service manual digital circuitry 23 © tait electronics limited january 2006 ■ rssi measurement for monitoring and rssi signal voltage output ■ sinad measurement ■ measurement and detection for control of the audio mute ■ calibration parameter estimation ■ line level monitoring. 3.2.3 ...

  • Page 24

    24 digital circuitry tb9100 reciter service manual © tait electronics limited january 2006 figure 3.1 reciter digital circuitry block diagram rssi pr ocess loopback cr osspoint switch fm demodulation rx audio pr ocessor ddc adc rx cr osspoint switch interface (serial port) codecs & signal conditioni...

  • Page 25: 3.3

    Tb9100 reciter service manual digital circuitry 25 © tait electronics limited january 2006 3.3 reduced instruction set computer (risc) refer to figure 3.2 on page 26 . 3.3.1 hardware and i/o the risc processor engine is a samsung s3c3410x processor with a 40 mhz external clock. It has 4 megabytes of...

  • Page 26

    26 digital circuitry tb9100 reciter service manual © tait electronics limited january 2006 3.3.2 responsibilities the risc communicates with the dsp’s shared memory via a host port interface. It loads the dsp code and monitors and controls the following dsp operations: ■ receive path ■ transmit path...

  • Page 27: 3.4

    Tb9100 reciter service manual digital circuitry 27 © tait electronics limited january 2006 the risc controls the frequency generation subsystem. It detects an external reference source and selects internal or external reference. It also programs, and handles out-of-lock signals for, the following sy...

  • Page 28

    28 digital circuitry tb9100 reciter service manual © tait electronics limited january 2006 which continuously monitors and maintains the 40mhz vcxo to a fixed frequency and constant phase relationship with respect to a 12.8 mhz reference. The 40 mhz vcxo oscillator is electrically tuned using two va...

  • Page 29: Reference Switch

    Tb9100 reciter service manual reference switch 29 © tait electronics limited january 2006 4 reference switch refer to figure 4.1 on page 31 . 4.1 synthesizer the external reference synthesizer consists of a programmable frequency synthesizer ic, a 12.8mhz vcxo, and a stable 10mhz or 12.8 mhz referen...

  • Page 30: 4.3

    30 reference switch tb9100 reciter service manual © tait electronics limited january 2006 the crystal unit, and the frequency stability of the externally supplied reference. 4.3 reference switch the reference switch consists of the external reference detector, the hardware switch, and the digital sw...

  • Page 31

    Tb9100 reciter service manual reference switch 31 © tait electronics limited january 2006 figure 4.1 reciter external reference block diagram /r /n 10 or 12.8mhz external reference internal reference 12.8mhz tcxo progr ammable reference divider progr ammable vco divider phase detector charge pump f ...

  • Page 32

    32 reference switch tb9100 reciter service manual © tait electronics limited january 2006.

  • Page 33: Network Circuitry

    Tb9100 reciter service manual network circuitry 33 © tait electronics limited january 2006 5 network circuitry 5.1 top level block diagram a simplified block diagram of the asif is shown in figure 5.1 . The top- level schematic sheet (226-02056-01 sheet 1) shows a more detailed view of the main circ...

  • Page 34

    34 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 is converted to analog signals by a codec chip. However, the codec chip configuration is controlled by the risc processor rather than the dsp. The dsp block (see “dsp” on page 65 ) contains the dsp chip, which...

  • Page 35

    Tb9100 reciter service manual network circuitry 35 © tait electronics limited january 2006 connector j100 is fitted as standard as it is used for factory loading of the initial bootloader code. Jtag connector j106 is only fitted to prototype boards used for debugging of dsp code. It cannot be fitted...

  • Page 36

    36 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 figure 5.1 identifying the circuitry on the digital and asif pcbs b asif pcb c mpc859t jtag connector (power pc) d ethernet transformer e ethernet phi f mpc859t (power pc) g tms320vc5510 dsp h flash memory i r...

  • Page 37

    Tb9100 reciter service manual network circuitry 37 © tait electronics limited january 2006 b j 1) 1@ 1# 1$ 1^ 1& 1* 1( 2) 2! 2@ 2# 2$ 2% 1! I 2& c d e f g h 1% 2^ 2* 2( 3) 3! 3@.

  • Page 38: 5.2

    38 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 5.2 risc processor 5.2.1 risc processor the main processor, u201, is a powerquicc mpc859tpz133, hereafter abbreviated to mpc. This device consists of a powerpc derived risc processor in conjunction with a micr...

  • Page 39

    Tb9100 reciter service manual network circuitry 39 © tait electronics limited january 2006 risc core a block diagram of the powerpc risc core is shown in figure 5.3 . The risc processor core is a powerpc derivative implementing a full 32- bit integer cpu architecture. Its risc (reduced instruction s...

  • Page 40

    40 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 ensure that the execution units always have a continual flow of instructions. Static branch prediction minimizes disruptions in the instruction flow through the pipelines by pre-fetching instructions following...

  • Page 41

    Tb9100 reciter service manual network circuitry 41 © tait electronics limited january 2006 outputs are combined into a single unified bus, ie. A von neumann architecture, for external memory and peripheral accesses. As well as address translation, the memory managers can apply protection attributes ...

  • Page 42

    42 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 the mpc also supports jtag mode for board testing, but this is not implemented on the asif due to lack of space for another connector. Basically, a jtag port provides access to all the mpc’s pins so that check...

  • Page 43

    Tb9100 reciter service manual network circuitry 43 © tait electronics limited january 2006 the bus monitor timer monitors the duration of bus cycles to ensure that they are terminated within a reasonable time. If the timer expires, it asserts the tea signal (see “mpc bus cycles” on page 48 ) to term...

  • Page 44

    44 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 aside from the external interrupts, the interrupt controller also combines and prioritizes interrupts from internal sources including the: ■ software watchdog timer ■ pcmcia interface ■ communications processo...

  • Page 45

    Tb9100 reciter service manual network circuitry 45 © tait electronics limited january 2006 when poreset is released the mpc latches the state of the modck1 and modck2 pins; these provide the initial settings for the clock generator pll in accordance with table 5.3 . Pull-up resistors r213 on modck1 ...

  • Page 46

    46 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 note the bits set to zero in the above table are obtained from the data bus pull-downs. The external data bus bit designations are normal numbering order as opposed to the powerpc reverse numbering order. ( se...

  • Page 47

    Tb9100 reciter service manual network circuitry 47 © tait electronics limited january 2006 or 16-bit devices with multiple read or write cycles. The transfer size is dynamically allocated by the memory controller (see “memory controllers” on page 49 ) and is encoded on the transfer size output pins,...

  • Page 48

    48 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 mpc bus cycles the mpc is capable of arbitrating with other external bus servers for control of the address and data buses using the bus request (br), bus grant (bg) and bus busy (bb) pins. External bus server...

  • Page 49

    Tb9100 reciter service manual network circuitry 49 © tait electronics limited january 2006 in the event that a bus cycle is not successfully completed, either the retry (retry) signal can be asserted to re-run the bus cycle, or the transfer error acknowledge (tea) signal can be asserted to cancel th...

  • Page 50

    50 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 ■ asynchronous sram ■ synchronous sram ■ synchronous burst sram ■ asynchronous flash eprom ■ synchronous burst flash eprom ■ standard eprom ■ standard dram ■ fast page dram ■ edo dram ■ sdram ■ most types of b...

  • Page 51

    Tb9100 reciter service manual network circuitry 51 © tait electronics limited january 2006 on initial boot up the mpc must obtain its program code from the flash eprom, before the gpcm has been initialized by the mpc, to access that flash eprom. To overcome this problem, cs0 has a special default co...

  • Page 52

    52 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 ■ burst read cycle request ■ single word write cycle request ■ burst write cycle request ■ periodic timer request ■ exception condition request the counter continues indexing through the ram until it encounter...

  • Page 53

    Tb9100 reciter service manual network circuitry 53 © tait electronics limited january 2006 independently of the serial communications facilities provided by the cpm, a fast ethernet controller (fec) is provided for either 100mbps (100baset) or 10mbps (10baset) ethernet. Both half-duplex and full-dup...

  • Page 54

    54 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 cpm serial direct memory access (sdma) to avoid the need for the mpc software to transfer large blocks of data to/ from the cpm, a dma controller is implemented in the cpm. This dma controller can transfer to/...

  • Page 55

    Tb9100 reciter service manual network circuitry 55 © tait electronics limited january 2006 the 1pps signal to allow that timer to measure the 1pps reference’s timing relative to the internal system time. Four independent baud-rate generators are provided for use by any of the internal serial ports. ...

  • Page 56

    56 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 the data rate over this interface is transmitted at 115.2kbaud using standard asynchronous format with one start bit, eight data bits (transmitted lsb first), no parity, and one stop bit. Reception is similarl...

  • Page 57

    Tb9100 reciter service manual network circuitry 57 © tait electronics limited january 2006 time-division multiplexed (tdm) port and time slot assigner (tsa) communication between the dsps in the asif and reciter takes place over a pcm highway. This is a tdm bus supporting bi-directional full-duplex ...

  • Page 58

    58 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 as the server, the risc sio generates a select signal (spisel) to enable the mpc’s spi port for data transfer. The select signal enables multiple client devices to be connected to an spi bus, but in the case o...

  • Page 59

    Tb9100 reciter service manual network circuitry 59 © tait electronics limited january 2006 is signified by a sequence of transitions on the sda and scl lines. I 2 c data transfers must be in multiples of a byte. Multiple devices can be connected to an i 2 c bus, with each having a unique identifying...

  • Page 60

    60 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 pb16 o/p reciter high- speed digital input 0 pb17 o/p reciter high- speed digital input 1 pb18 o/p reciter high- speed digital input 2 pb19 o/p reciter tx key pb20 o/p antenna relay control “antenna relay cont...

  • Page 61: 5.3

    Tb9100 reciter service manual network circuitry 61 © tait electronics limited january 2006 parallel port pins that are not externally connected are set to outputs, so that the internally connected paralleled inputs do not float. 5.3 memory two types of memory are connected to the mpc main bus: flash...

  • Page 62

    62 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 5.3.2 synchronous dram (sdram) the main memory for executable code and data is normally provided by two 256mbit sdram chips (u300 and u302), each 4m x 16 bits x 4 banks. Together, these provide 64mbytes (16meg...

  • Page 63

    Tb9100 reciter service manual network circuitry 63 © tait electronics limited january 2006 address multiplexing and command codes like other dram types, sdrams use multiplexed address inputs (a0 - a11) to reduce the number of package pins. Initially the row addresses (usually the higher order addres...

  • Page 64

    64 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 ■ burst length = 4 (see “sdram burst cycles” on page 64 ) ■ burst write enabled ■ sequential address mode ■ cas latency = 2 after a short time delay, the sdram is ready for normal operation. Sdram read and wri...

  • Page 65: 5.4

    Tb9100 reciter service manual network circuitry 65 © tait electronics limited january 2006 8us, to minimize the disruption to mpc memory accesses. The issuing of refresh cycles is handled automatically by the upm (see “user- programmable machines” on page 51 ) using its periodic timer to determine t...

  • Page 66

    66 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 processor core the tms320vc5510 dsp has a 16-bit core with extensive instruction pipelining for high performance. See the cpu architecture description (reference 9) for details. Internally, the dsp utilizes a ...

  • Page 67

    Tb9100 reciter service manual network circuitry 67 © tait electronics limited january 2006 the dsp incorporates a multi-channel dma controller to facilitate rapid data movement without requirement intervention from the dsp core. This dma controller can transfer data between the internal memory, exte...

  • Page 68

    68 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 the actual multiplication ratio is set by programming an internal pll register; in the asif this will typically be set to 12, giving a dsp clock of 153.600 mhz from the 12.800 mhz reciter reference clock. An e...

  • Page 69

    Tb9100 reciter service manual network circuitry 69 © tait electronics limited january 2006 read the state of the boot mode selection pins to determine the required boot load source. Four boot mode selection pins, bootm[3..0], specify the mode in accordance with table 5.12 . In the asif, the boot mod...

  • Page 70

    70 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 the hpi has two modes of operation: multiplexed and non-multiplexed address/data; the asif uses non-multiplexed mode as selected by the hmode pin. In non-multiplexed mode, the host port appears to be a single ...

  • Page 71: 5.5

    Tb9100 reciter service manual network circuitry 71 © tait electronics limited january 2006 5.4.3 serial interfaces two separate multi-channel buffered serial ports (mcbsp) are used to communicate with the asif codec chip (mcbsp0) and the reciter dsp (mcbsp1). A third mcbsp channel (mcbsp2) is availa...

  • Page 72

    72 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 the rs-232 level signals, rs232_txd and rs232_rxd, are converted to lvttl levels using dual rs-232 transceiver u600 (adm3202). This device incorporates an internal charge pump to generate the positive and nega...

  • Page 73

    Tb9100 reciter service manual network circuitry 73 © tait electronics limited january 2006 5.5.3 1 pps input the 1 pps input circuitry is similar to that for the general-purpose digital inputs, except that the filter (r641 and c653) time constant is considerably reduced to approximately 500ns. Havin...

  • Page 74: 5.6

    74 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 and zener diode d601, before passing through the customary emc filtering components. Op amp u601 is powered from the +5v supply, so it only supports a 0v to 5v output range, as opposed to the 0v to 6.5v range ...

  • Page 75

    Tb9100 reciter service manual network circuitry 75 © tait electronics limited january 2006 the internal logic of u700 runs from a +2.5v supply, which is generated from the +3.3v supply by an internal voltage regulator. Its output, vcc25out, is fed back to power the internal logic, as well as supplyi...

  • Page 76

    76 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 5.6.3 ethernet phy clocking timing of the internal operations of the ethernet phy requires an external 25.000 mhz clock source. This is provided from a timer output, tout1, of the mpc to the xi input of the ph...

  • Page 77: 5.7

    Tb9100 reciter service manual network circuitry 77 © tait electronics limited january 2006 5.7 audio and e&m interface the audio and e&m interface provides a basic four-wire (4w) analog audio and a dc signalling path into the base station for interconnection with existing analog infrastructure. It i...

  • Page 78

    78 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 the codec power supply rail of 3.3v limits the maximum output swing on each of the ear1op and ear1on outputs to approximately 2.3vpp. Since this is not sufficient, if connected directly through a line transfor...

  • Page 79

    Tb9100 reciter service manual network circuitry 79 © tait electronics limited january 2006 5.7.2 codec digital interfaces the codec supports two different types of digital interface: an i 2 c interface for configuration setting and a pcm-type interface for transferring the digital audio data. Codec ...

  • Page 80

    80 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 the base station supplies if the isolation voltage requirements for the audio interface are to be maintained. M-lead interface the m-lead is used for outgoing signalling and is controlled by an opto- mos relay...

  • Page 81: 5.8

    Tb9100 reciter service manual network circuitry 81 © tait electronics limited january 2006 5.8 clock oscillator both the mpc and dsp incorporate phase-locked loops to generate their respective high frequency clocks from a relatively low reference frequency. On the asif, separate reference frequencie...

  • Page 82

    82 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 5.9.1 +3.3v switching regulator firstly, consider the +3.3v switching regulator on the rhs of u900. This is a conventional buck regulator with a synchronous rectifier to maximize switching efficiency with low ...

  • Page 83

    Tb9100 reciter service manual network circuitry 83 © tait electronics limited january 2006 5.9.3 +1.6v switching regulator the +1.6v dsp core supply is sub-regulated from the +3.3v supply with another switching regulator, u910. This device is also a current mode controller and operates in a similar ...

  • Page 84

    84 network circuitry tb9100 reciter service manual © tait electronics limited january 2006 would conduct, and prevent the charge pump capacitors fully charging. With both q902 and q903 conducting, capacitors c921 and c922 are connected in series and stacked on top of the +3.3v supply. The voltage on...

  • Page 85

    Tb9100 reciter service manual network circuitry 85 © tait electronics limited january 2006 5.9.7 power-on reset a power-on-reset signal is required for initializing various chips on the board; this is provided by cpu supervisor chip u901. On power up this chip asserts its rst output low and holds it...

  • Page 86

    86 network circuitry tb9100 reciter service manual © tait electronics limited january 2006.

  • Page 87: Rf Circuitry

    Tb9100 reciter service manual rf circuitry 87 © tait electronics limited january 2006 6 rf circuitry 6.1 receiver rf circuitry - vhf reciter 6.1.1 front end the incoming signal from the bnc connector is fed through a low pass filter, then through a band pass “doublet” filter, and finally through a h...

  • Page 88

    88 rf circuitry tb9100 reciter service manual © tait electronics limited january 2006 6.1.3 if circuitry the signal from the mixer is fed to the if amplifier through a 2-pole crystal filter which provides protection from strong off-channel signals. Note that there are two 2-pole crystal filters, one...

  • Page 89

    Tb9100 reciter service manual rf circuitry 89 © tait electronics limited january 2006 signal to a dc voltage (0 to 22v 1 ) to tune the vco for correction. The loop filter has a bandwidth of 150 hz and filters the vco control lines, reference side bands and spurious signals. Note the vco frequency in...

  • Page 90

    90 rf circuitry tb9100 reciter service manual © tait electronics limited january 2006 figure 6.2 reciter receiver synthesizer block diagram /r /n 12.8mhz reference oscillator receiver vco progr ammable reference divider progr ammable vco divider phase detector lock detect output charge pump f ref f ...

  • Page 91: 6.2

    Tb9100 reciter service manual rf circuitry 91 © tait electronics limited january 2006 6.2 receiver rf circuitry - uhf reciter 6.2.1 front end h band reciter the incoming signal from the bnc connector is fed through a triplet helical filter, followed by a simple low pass network which attenuates harm...

  • Page 92

    92 rf circuitry tb9100 reciter service manual © tait electronics limited january 2006 6.2.3 if circuitry the signal from the mixer is fed to the if amplifier through a 4-pole crystal filter which provides protection from strong off-channel signals. The if amplifier is a two-transistor design with vo...

  • Page 93

    Tb9100 reciter service manual rf circuitry 93 © tait electronics limited january 2006 the loop filter has a bandwidth of 150 hz and filters the vco control lines, reference side bands and spurious signals. Note the vco frequency increases as the control line voltage increases. 6.2.5 vco the receiver...

  • Page 94: 6.3

    94 rf circuitry tb9100 reciter service manual © tait electronics limited january 2006 to prevent overload of the adc, the peak level at its input should not exceed 0dbm. This corresponds to –30 dbm at the antenna connector, and approximately –22 dbm at the agc pick-off point. The agc operates over a...

  • Page 95

    Tb9100 reciter service manual rf circuitry 95 © tait electronics limited january 2006 low pass filter there are two output signals from the twisted ring counter. Both signals have the sum and difference frequency contents of the tcxo and vcxo signals, but there is a 90° phase difference between them...

  • Page 96

    96 rf circuitry tb9100 reciter service manual © tait electronics limited january 2006 the synthesizer uses a phase-locked loop to lock the exciter vco to a modulatable frequency reference. The synthesizer ic receives the divider and control information from the risc processor via a 3-wire serial bus...

  • Page 97

    Tb9100 reciter service manual rf circuitry 97 © tait electronics limited january 2006 figure 6.5 reciter exciter synthesizer modulator block diagram - b and h bands adc adc da c da c delay delay fm demodulator vcomod digitised tx audio intgain dsp based fcl processor vcxoscale triplescale triplescal...

  • Page 98

    98 rf circuitry tb9100 reciter service manual © tait electronics limited january 2006 the fcl_vcxo reference oscillator is modulated by the fcl. The fcl itself is locked to an internal reference 12.8 mhz tcxo. When the tcxo is active, the exciter synthesizer is locked to an “internal reference mode”...

  • Page 99

    Tb9100 reciter service manual rf circuitry 99 © tait electronics limited january 2006 modulation based on varicap diodes modulation on the vco is provided by an auxiliary varicap-based control circuit which provides a modulation gain of 5khz/v p . Low noise amplifier a bjt cascode amplifier is used ...

  • Page 100

    100 rf circuitry tb9100 reciter service manual © tait electronics limited january 2006 fixed slope attenuator, final driver and fixed attenuator to provide a drive of + 20 dbm, a silicon-based bjt transistor is used as a broad band matched class a final driver. To maintain a fixed input level, a fix...

  • Page 101: Power Supply

    Tb9100 reciter service manual power supply 101 © tait electronics limited january 2006 7 power supply the reciter is designed to operate from the + 28v regulated supply provided by the pmu. The nominal + 28v supply enters the reciter digital pcb and passes through an overcurrent and overvoltage prot...

  • Page 102

    102 power supply tb9100 reciter service manual © tait electronics limited january 2006 figure 7.1 reciter power supply block diagram polyswitch + zener dsp low regulator 2.5v 3v lock-out circuit* 3v regulator 3.3v regulator 8v regulator power switch power switches charge pump power switch power swit...

  • Page 103: Appendices

    Tb9100 reciter service manual appendices 103 © tait electronics limited january 2006 8 appendices 8.1 appendix a – i 2 c device addresses table 8.1 i 2 c device addresses device i 2 c address range u202, 24c16 e2prom 0xa0 - 0xaf u500, tlv320aic1103 codec 0xe2 - 0xe3.

  • Page 104: 8.2

    104 appendices tb9100 reciter service manual © tait electronics limited january 2006 8.2 appendix b – asif connectors note all signal directions are specified with respect to the asif. 8.2.1 j100 mpc859t bdm (background debug mode) connector 8.2.2 j101 asif to reciter connector table 8.2 mpc859t bdm...

  • Page 105

    Tb9100 reciter service manual appendices 105 © tait electronics limited january 2006 13 risc_rs232_txd i/p serial comms input 14 risc_rs232_rxd o/p serial comms output 15 tx_key o/p transmit enable 16 rx_gate i/p receiver active 17 coax_rly_drv i/p antenna relay control 18 hs_dig_in_0 o/p reciter di...

  • Page 106

    106 appendices tb9100 reciter service manual © tait electronics limited january 2006 8.2.3 j102 asif dsp to reciter dsp connector table 8.4 asif dsp to reciter dsp connector pinout pin number signal name direction function 1 not used 2 gnd 3 not used 4 gnd 5 not used 6 gnd 7 not used 8 gnd 9 dsp_dt2...

  • Page 107

    Tb9100 reciter service manual appendices 107 © tait electronics limited january 2006 8.2.4 j103 external i/o connector 8.2.5 j104 ethernet connector table 8.5 external i/o connector pinout pin number signal name direction function 1 ant_rly-dig4_in i/) antenna relay control o/p, general purpose digi...

  • Page 108

    108 appendices tb9100 reciter service manual © tait electronics limited january 2006 8.2.6 j105 4w audio and e&m connector 8.2.7 j106 dsp jtag connector (on underside of board) table 8.7 4w audio and e&m connector pinout pin number signal name direction function 1 ea i/p signaling input 2 eb i/p sig...

  • Page 109: 8.3

    Tb9100 reciter service manual appendices 109 © tait electronics limited january 2006 8.3 appendix c – test points table 8.9 testpoints reference designator pcb grid reference function tp200 a4 general-purpose software flag tp201 a6 general-purpose software flag tp202 a4 cpu instruction watchpoint fl...

  • Page 110

    110 appendices tb9100 reciter service manual © tait electronics limited january 2006 tp407 d2 dsp serial port transmit frame sync tp408 e2 dsp serial port transmit clock - tp409 e2 dsp serial port receive frame sync - tp410 e2 dsp serial port receive clock - tp411 f3 dsp serial port receive data - t...

  • Page 111: 8.4

    Tb9100 reciter service manual appendices 111 © tait electronics limited january 2006 8.4 appendix d – processor port assignments 8.4.1 mpc859t port assignments note many of the pins on the mpc859t have multiple functions. Where a particular pin function is used in the asif application, this is indic...

  • Page 112

    112 appendices tb9100 reciter service manual © tait electronics limited january 2006 a[24] c11 i/o address bus 24 a[25] d10 i/o address bus 25 a[26] c10 i/o address bus 26 a[27] a13 i/o address bus 27 a[28] a10 i/o address bus 28 a[29] a12 i/o address bus 29 a[30] a11 i/o address bus 30 a[31] a9 i/o...

  • Page 113

    Tb9100 reciter service manual appendices 113 © tait electronics limited january 2006 bs_a3 b8 o/p byte select 3 on upma burst f1 i/o burst transaction ce1a miitxd2 b3 o/p card enable 1 slot a mii transmit data 2 ce2a miitxd3 a3 o/p card enable 2 slot a mii transmit data 3 clkout w3 o/p clock output ...

  • Page 114

    114 appendices tb9100 reciter service manual © tait electronics limited january 2006 d[16] u10 i/o data bus 16 d[17] t12 i/o data bus 17 d[18] v9 i/o data bus 18 d[19] u9 i/o data bus 19 d[20] v8 i/o data bus 20 d[21] u8 i/o data bus 21 d[22] t9 i/o data bus 22 d[23] u12 i/o data bus 23 d[24] v7 i/o...

  • Page 115

    Tb9100 reciter service manual appendices 115 © tait electronics limited january 2006 gpla3 gplb3 cs3 c5 o/p general-purpose line 3 on upma general-purpose line 3 on upmb chip select 3 gplza5 d3 o/p general-purpose line 5 on upma hreset n4 i/o hard reset ipa0 miirxd3 utpb_split[0] t5 i/p input port a...

  • Page 116

    116 appendices tb9100 reciter service manual © tait electronics limited january 2006 ipb5 lwp1 vf1 j4 i/o input port b[5] load/store watchpoint 1 visible instruction queue flush status 1 ipb6 dsd1 at0 k3 i/o input port b[6] development serial data input address type 0 ipb7 ptr at3 h1 i/o input port ...

  • Page 117

    Tb9100 reciter service manual appendices 117 © tait electronics limited january 2006 l1st3 l1rqb pc13 e18 i/o output strobe from the serial interface d-channel request signal for serial interface tdmb general-purpose i/o port c, bit 13 l1st4 l1rqa pb16 phreq[0] rxaddr0 n16 i/o output strobe from the...

  • Page 118

    118 appendices tb9100 reciter service manual © tait electronics limited january 2006 miirxd3 l1tsynca pd15 utpb[0] u17 i/o media independent interface receive data 3 input transmit data sync signal to tdm channel a general-purpose i/o port d, bit 15 utopia bus bit 0 input/output signal miirxdv pd6 u...

  • Page 119

    Tb9100 reciter service manual appendices 119 © tait electronics limited january 2006 reject1 spisel pb31 c17 i/o scc1 cam interface reject pin spi client select input general-purpose i/o port b, bit 31 rstconf p3 i/p reset configuration rstrt1 pb14 rxaddr2 u18 i/o scc1 serial cam interface outputs t...

  • Page 120

    120 appendices tb9100 reciter service manual © tait electronics limited january 2006 tdi dsdi h17 i/p input serial data for the scan chain logic input serial data for the development port and determines the operating mode of the development port at reset tdo dsdo g17 o/p output serial data for the s...

  • Page 121

    Tb9100 reciter service manual appendices 121 © tait electronics limited january 2006 upwaita gpla4 c1 i/o user programmable machine wait a general-purpose line 4 on upma upwaitb gplb4 b1 i/o user programmable machine wait b general-purpose line 4 on upmb vddh pwr i/o buffers supply voltage vddl pwr ...

  • Page 122

    122 appendices tb9100 reciter service manual © tait electronics limited january 2006 8.4.2 tms320vc5510 port assignments note used pin are shown in bold text; unused pins in plain text. This table is sorted by pin name order. Table 8.11 tms320vc5510 port assignments pin name pin no. Type function a[...

  • Page 123

    Tb9100 reciter service manual appendices 123 © tait electronics limited january 2006 bootm3 e5 i/p boot mode selection signal 3 ce0 j2 o/p external memory space enable 0 ce1 h2 o/p external memory space enable 1 ce2 g1 o/p external memory space enable 2 ce3 e4 o/p external memory space enable 3 clki...

  • Page 124

    124 appendices tb9100 reciter service manual © tait electronics limited january 2006 d[14] d2 i/o external data bus 14 d[15] e2 i/o external data bus 15 d[16] n3 i/o external data bus 16 d[17] t1 i/o external data bus 17 d[18] r3 i/o external data bus 18 d[19] p4 i/o external data bus 19 d[20] r4 i/...

  • Page 125

    Tb9100 reciter service manual appendices 125 © tait electronics limited january 2006 ha[0] d16 i/p host address bus 0 ha[1]/hcntl1 e16 i/p host address bus 1 ha[2]/has f15 i/p host address bus 2 ha[3] g15 i/p host address bus 3 ha[4] h14 i/p host address bus 4 ha[5] j14 i/p host address bus 5 ha[6] ...

  • Page 126

    126 appendices tb9100 reciter service manual © tait electronics limited january 2006 hd[9] c14 i/o host data bus 9 hd[10] a15 i/o host data bus 10 hd[11] d13 i/o host data bus 11 hd[12] d12 i/o host data bus 12 hd[13] d11 i/o host data bus 13 hd[14] d10 i/o host data bus 14 hd[15] d9 i/o host data b...

  • Page 127

    Tb9100 reciter service manual appendices 127 © tait electronics limited january 2006 sdras a11 o/p sdram row address strobe sdwe b12 0/p sdram write enable ssads n4 o/p sbsram address strobe ssoe m3 o/p sbsram output enable sswe m2 o/p sbsram write enable tck l17 i/p ieee standard 1149.1 test clock ...

  • Page 128: 8.5

    128 appendices tb9100 reciter service manual © tait electronics limited january 2006 8.5 appendix e – component locations this table indicates where components may be found on the pcb layout (by grid reference) or on the schematics (by sheet number and grid reference). For clarity, ic power connecti...

  • Page 129

    Tb9100 reciter service manual appendices 129 © tait electronics limited january 2006 c516 k3 5d11 c902 n7 9g2 d501 h3 5j11 c517 n2 5f6 c903 l6 9j3 d502 h3 5h11 c518 n4 5e6 c904 p7 9g3 d503 k1 5f11 c519 n2 5d6 c905 m5 9h4 d504 k2 5d11 c520 n1 5e7 c906 n5 9h4 d505 n2 5c9 c521 m1 5f9 c907 m6 9h5 d506 n...

  • Page 130

    130 appendices tb9100 reciter service manual © tait electronics limited january 2006 ds400 a1 4g8 f600 k4 6d3 r209 d4 2j7 ds500 m3 5j8 f601 h4 6j4 r210 c3 2e7 e100 h7 1c3 f900 l7 9j2 r211 a5 2g7 2f7 e101 h7 1c3 j100 b2 1j2 r212 a5 2f7 2g7 e102 g7 1c3 j101 m8 1g2 r213 f5 7f7 e103 h7 1b3 j102 h8 1c2 r...

  • Page 131

    Tb9100 reciter service manual appendices 131 © tait electronics limited january 2006 r406 a1 4g8 r641 l5 6d5 r911 k7 9c8 r407 f6 4e7 r643 k6 6c6 r912 p7 9f5 r408 h7 4b3 r650 j5 6d7 r913 p7 9f7 r500 n2 5e2 r651 n4 6b7 r920 h6 9d11 r501 p3 5c4 r657 n4 6b8 r921 h6 9d11 r502 p2 5f6 r658 n4 6b8 r922 j5 2...

  • Page 132

    132 appendices tb9100 reciter service manual © tait electronics limited january 2006 r601 p4 6b3 r807 g6 8e5 tp221 a2 2e9 r602 k5 6d5 r808 g5 8e6 tp222 a2 2c11 r620 h4 6h3 r900 n7 9f3 tp223 a3 2b7 r630 l5 6h4 r901 n7 9f3 tp400 e4 4g7 r631 p4 6b7 r902 n7 9g3 tp401 e4 4g7 tp402 e4 4g7 u202 h5 2b6 u601...