atvst-cnv - RVR Elettronica SpA Documentation Server
Contents
1. 34 44 Rev 1 2 12 11 08 User Manual BW Ba ATVST CNV The calibration of this filter must be done setting the instrument with markers as indicated in tables of appendix for details see chap 10 3 7 Switch on the equipment and set the channel SETTING CH SETTING TX CHANNEL xx OFFSET xx 8 Set the output power to 10 and check that the signal is present on output POWER LEVEL gt PUD MLC 0 0W MANUAL 10 0 9 Adjust the reading power Switch off and switch on holding down the encoder for 5 seconds Set the output power to 10W POWER LEVEL turn the encoder clockwise to increase the power Select the INSTALLATION menu to make the calibration INSTALLATION CALIBRATION PUD Set 10W Select ESC to store the settings 10 Enabled the ALC function Enter into SETTING ALC MODE set AUT 11 Before connecting the eguipment to an amplifier or to the antenna you must adjust the output power to OW A Warning before connecting the exciter with a system check that the output power is set to 0W The power level must be adjusted successively based on t2. 6 1 Front Panel Figure 6 1 5 10W UHF SYNT TV TRANSMITTER FRONT VIEW 1 AIR FLOW 2 LO LOCK 3 ALC LOCK 4 FAULT 5 A P L 6 CONTRAST 7 BIAS PHASE LEVEL 8 PREC OFF 9 IF 10 RF 11 VIDEO PRES 12 GROUP DELAY 13 ECO 14 WHITE CLIP 15 DISPLAY Air grille Green LED When is lighted LO is coupled Green LED When is lighted ALC is ON when is blinking ALC is working Red LED When is lighted is in failure Red LED When is lighted not there is Video signal Average Power Limit Display contrast trimmer Trimmer for equipment precorrection standard precorrection Yellow LED When is lighted the PREC is OFF SMB Male IF Monitor OdBm SMB Male Outlet RF Monitor Green LED Input Video present is lighted when the video is present Green LED When is lighted inserted Group Delay correction Green LED When is lighted the A P L is over of 2 minuts Green LED When is lighted white level is over predefined threshold Display LCD 2 raws 16 characters 16 ROTATORY ENCODER 17 LO 18 SWITCH ON OFF User Manual Scroll menu for read the measure outlet regulation inlet Video level Carrier level Sound IF etc SMB Male LO Local oscillator monitor Power supply switch Rev 1 2 12 11 08 19 44 ATVST CNV 6 2 Rear Panel Figure 6 2 5 10W UHF SYNT TV TRANSMITTER REAR VIEW 1 MAINS Connectors for 100 240 V 50 60 Hz mains power supp
3. Qualified means personnel who are trained in and experienced with equipment operation and who are responsible for their own safety and that of other unqualified personnel placed under their supervision when working on the equipment A WARNING Residual voltage may be present inside the equipment even when the ON OFF switch is set to Off Before servicing the equipment disconnect the power cord or switch off the main power panel and make sure the safety earth connection is connected Some service situations may require inspecting the equipment with live circuits Only trained and qualified personnel may work on the equipment live and shall be assisted by a trained person who shall keep ready to disconnect power supply at need R V R Television shall not be liable for injury to persons or damage to property resulting from improper use or operation by trained untrained and qualified unqualified persons A WARNING The equipment is not water resistant Any water entering the enclosure might impair proper operation To prevent the risk of electrical shock or fire do not expose this equipment to rain dripping or moisture Please observe local codes and fire prevention rules when installing and operating this equipment A WARNING This equipment contains exposed live parts involving an electrical shock hazard Always disconnect power supply before removing any covers or other parts of the equipment Ventilation slits and holes are p
4. and the Video level signal U22 The relay K2 inserts or it disconnects the Precorrector of Group Delay Sound Function The Audio signal balanced enters from the audio connector CM2 and it goes toward the operational amplifier U18B LF353 This Amplifier brings unbalanced audio signal The output level is regulated by the electronic trimmer U19 AD5242 piloted of the CPU The operational circuits U18A and U16A implement the preenphasy function The circuit U16B drives the VCO O2 SST310 for to effect the modulation FM This integrated in stereo configuration accept in input audio signal of the stereo channel S1 this with the purpose to effect the correct coding of the stereo signal The VCO constituted by O2 and by the diodes VARICAP DV1 DV2 DV3 DV4 and of the Buffer Q3 is hooked through a PLL to the frequency video 38 9 MHz so that to center on the standard frequency 33 4 MHZs system PAL B G In this way the difference between the carrying IF Video and IF Audio remains always 9 9MHZ The operational amplifier U13 realizes the filter PLL of the VCO The output signal of the VCO O3 SST310 passes through a diodes attenuator pin D2 D3 HSMP3814 and it is filtered and envoy to the connector 52x2 The attenuation of the audio signal is realized by the CPU through the electronic trimmer U19 AD5242 The relay K1 commanded by the CPU allows the insertion or the exclusion of the preenphasy The operational circuit U1 A measures
5. 5 44 ATVST CNV B W B 52 Management Firmware 5 2 1 ATVST CNV Transmitter Function ATVST CNV Start first screen for 5 sec SW VER 01 00 07 TX MONO PAL G Default screen after 2 minuts return in Default screen PUD 0 0W PUR 0 0W Turn the rotatory switch to scroll to the next screen Tx Channel 21 10 10 07 10 50 6 44 Rev 1 2 12 11 08 User Manual BW Ba ATVST CNV 5 2 2 Menu Push rotatory switch for to enter to the function or turn counter clockwise for scroll gt MEASURE LEVEL POWER LEVEL gt PRECORRECTOR OFF SETTINGS ESC gt STATUS ALARM User Manual Rev 1 2 12 11 08 7144 ATVST CNV R W TELEVISION 5 2 3 Measure Level Selection Push to rotatory switch to enter There are some measure VIDEO 0 mV SYNC 0 mV PUD 0 0 W PUR 0 0 W TEMP 25 C IF LEV 1 0 dBm DEV 0 0 KHz 7V 6 8 V 15V 14 3 V 15V 14 1 V 28V 28 5 V IOUT 0 0 A 8 44 Rev 1 2 12 11 08 User Manual BW Ba ATVST CNV 5 2 4 Power Level Selection If the ALC is MANUAL turning the knob you can change the power output PUD MLC 0 0 W MANUAL 0 0 5 2 5 Power Level Selection If the ALC is AUTOMATIC turning the knob you can change the power output PUD ALC 0 0 W
6. 783 25 Told 829 00 782 00 788 00 67 791 00 789 25 793 75 835 00 788 00 794 00 68 797 00 795 25 799 75 841 00 794 00 800 00 69 803 00 801 25 805 75 847 00 800 00 806 00 70 809 00 807 25 811 75 853 00 806 00 812 00 71 815 00 813 25 817 75 859 00 812 00 818 00 72 821 00 819 25 823 75 865 00 818 00 824 00 73 827 00 825 25 829 75 871 00 824 00 830 00 74 833 00 831 25 835 75 877 00 830 00 836 00 75 839 00 897 29 841 75 883 00 836 00 842 00 User Manual Rev 1 2 12 11 08 39 44 ATVST CNV 76 77 78 79 80 81 82 83 845 00 851 00 857 00 863 00 869 00 875 00 881 00 887 00 843 25 849 25 855 25 861 25 867 25 873 25 879 25 885 25 847 75 853 75 859 75 865 75 871 75 877 75 883 75 889 75 10 3 3 Standard M NTSC VHF CHANNEL mid freg gt 8 g 10 11 12 13 889 00 895 00 901 00 907 00 913 00 919 00 925 00 931 00 842 00 848 00 854 00 860 00 866 00 872 00 878 00 884 00 CRASH TELEVISION 848 00 854 00 860 00 866 00 872 00 878 00 884 00 890 00 177 00 183 00 189 00 195 00 201 00 207 00 213 00 video freq MK1 175 25 181 25 187 25 193 25 199 25 205 25 211 25 audio freq MK2 179 79 185 75 191 79 197 79 203 75 209 79 215 75 notch freq MK3 221 00 227 00 233 00 239 00 245 00 251 00 257 00 f min 174 00 180 00 186 00 192 00 198 00 204 00 210 00 f max 180 00 186 00 192 00 198 00 204 00 210 00 216 00 10 3 4 Standard B G PAL VHF 4
7. Cover victim with a blanket e Trytoreassure the victim Loosen the victim s clothing and have him her lie down Call for medical help as soon as possible 3 2 Treatment of electric burns 3 2 1 Large burns and broken skin Cover affected area with a clean cloth or linen Do not break any blisters that have formed remove any clothing or fabric that is stuck to the skin apply adequate ointment e Administer adequate treatment for the type of accident Get the victim to a hospital as quickly as possible Elevate arms and legs if injured If medical help is not available within an hour the victim is conscious and is not retching administer a solution of table salt and baking soda one teaspoon of table salt to half teaspoon of baking soda every 250 ml of water Have the victim slowly drink half a glass of solution for four times during a period of 15 minutes Stop at the first sign of retching Do not administer alcoholic beverages 3 2 2 Minor burns e Apply cold not ice cold strips of gauze or dress wound with clean cloth Do not break any blisters that have formed remove any clothing or fabric that is stuck to the skin apply adequate ointment If needed have the victim change into clean dry clothing e Administer adequate treatment for the type of accident Get the victim to a hospital as guickly as possible Elevate arms and legs if injured User Manual Ly A
8. Distributors can provide the necessary information to troubleshoot the most frequently encountered problems Normally Sellers and Distributors can offer a faster repair service than the Manufacturer would Please note that Sellers can pinpoint problems due to wrong installation 2 If your Seller cannot help you contact R V R Television and describe the problem if our staff deems it appropriate you will receive an authorisation to return the equipment along with suitable instructions 3 When you have received the authorisation you may return the unit Pack the unit carefully before shipment use the original packaging whenever possible and seal the package perfectly The customer bears all risks of loss i e R V R shall not be liable for loss or damage until the package reaches the R V R factory For this reason we recommend insuring the goods for their full value Returns must be sent on a C I F basis PREPAID to the address stated on the authorisation as specified by the R V R Service Manager Rev 1 2 12 11 08 1 44 2 44 ATVST CNV Units returned without a return authorisation may be rejected and sent back to the sender 4 Be sure to include a detailed report mentioning all problems you have found and copy of your original invoice to show when the warranty period began with the shipment Please send spare and warranty replacement parts orders to the address provided below Make sure to specify eguipment model
9. THRESHOLD 0 0 W 5 2 6 Precorrector On Off Selection Push the rotatory switch to enter indicates the state of Precorrector gt PRECORRECTOR ON SETTINGS User Manual Rev 1 2 12 11 08 9 44 ATVST CNV LORY 5 2 7 Setting Selection Push to rotary switch to enter to the menu gt VIDEO SETTINGS SOUND SETTINGS gt CH SETTING ALC MODE AUT gt IF SOURCE INT APL ON gt ECONOMY ON TIMER TIMER gt ESC 10 44 Rev 1 2 12 11 08 User Manual Bra Bra ATVST CNV TELEVISION 5 2 8 Video Setting Selection Regulation of video settings gt VIDEO LEVEL WHITE CLIPPER gt GROUP DELAY OFF x ESC 5 2 9 Video Level Selection Video level regulation SYNC 0 mV 70 0 5 2 10 White Clipper Selection Set by default to 51mV WHITE CLIP 751 mV User Manual Rev 1 2 12 11 08 11 44 ATVST CNV 5 2 11 Group DLY On Off Selection Insert Group delay function ON or OFF gt GROUP DELAY OFF ESC gt GROUP DELAY ON ESC 5 2 12 Sound Settings Selection Regulation of audio settings gt AUDIO LEVEL IF SOUND LEVEL gt IF SOUND ON PREENPHASY ON PREENPHASY ON gt ESC 12 44 Rev 1 2 12 11 08 B W B TELEVISION
10. of Forward and Reflected power on LCD display The directional coupler User Manual Rev 1 2 12 11 08 29 44 ATVST CNV RR is freguency equalizer over 470 860 UHF vers 170 230 VHF vers Mhz broadcast band Is directivity is more better than 20 dB and insertion loss on main line is more lower than 0 05 dB All the directional coupler is made with microstrip line technology for very reliable application There is a coplanar microstrip for auxiliary output RF monitor connected to bnc connector 50 Ohm impedance Coupling level for this monitor signal is around 50 dB The Rf input is sma connector RF IN and is the input of RF final amplifier The Rf output power signal is available to N connector RF out 8 8 Optional Precorrector As alternatives to precorrettor provided on the card when used ALC RF amplifier from 10W It allows you to make a correction more effectively and achieve a level of intermodualzioni good over the whole frequency range By connecting internal 2 connectors excludes the precorrettore front integrated and include that with additional adjustments placed on the side of the modulator Standard Precorrector Optional Precorrector Figure 8 3 30 44 Rev 1 2 12 11 08 User Manual BW Ba ATVST CNV The function of precorrection is realized with the technique and Q The signal is divided into two components and distorted through diodes pin At the end of the distortion process t
11. response 0 3 dB n SOHztiSKh2 C G G H cdi lt 0 4 9 Signal to noise ratio gt 65 dB 30Hz 15Khz not weighted RMS with de ___ _ 3 emphasis Protections Max VSWR Max Idc Max Temperature Max output power 22 44 Rev 1 2 12 11 08 User Manual B W B ATVST CNV 8 Operating principles The figures below provide an overview of ATVSC CNV To Directional antenna Coupler Audio Right Video In Audio Left Stereo Coder Video Audio Up Optional Modulator converter 15V 15V 5V 26V 1 1 1 1 1 Mains Display Optional Pre Pre Corrector corrector Figure 8 1 Following is a brief description of the different module functions all diagrams and board layout diagrams are included in the Technical Appendix Vol 2 6 1 ALC Brief functional description of main unit in Exciter ATVST CNV Functional Description e Analog and digital acquisition of all signal measurement and readout on LCD display Setting with 12C bus protocol freguency of PLL local oscillator for operative channel Detecting of functional failure and inhibit of RF power amplifier in critical situation Remote communicationwith RS 232 interface e Microcontroller pic 188620 Microchip 16 bit Clock processor 19 66 MHz e Data speed of RS 232 9600 Bps Video analog processorfor complete predistortion video signal User Manual Rev 1 2 12 11 08 23 44 ATVST CNV RAA 8 1 1 24 44 Sync compress
12. standard interface is available for remote controll of transmitter All information can be send to remote PC for monitoring main functions User Manual Rev 1 2 12 11 08 3 44 ATVST CNV RAA 4 2 4144 Composition In standard configuration ATVST CNV exciter is composed by ALC Controller of all Exciter RS 232 interface Analog measurement acquisition Interconnection with other board Display Pre corrector User interface and standard predistorsion unit for pre correction final power IF modulator module Vision audio IF carrier generator and modulator UP converter module High performance mixer for frequency conversion IF to RF channel Frequency synthetizer PLL oscillator with very low phase noise RF amp unit Power RF amplifier 5 W o 10W Directional Coupler For direct reflect power measurement Switching supply unit Power converter with thermal and short circuit protection Low ripple and noise Mains voltage from 100 to 250 Vac 47 63Hz Additional precorrector As alternative to resident precorrector in Prec ALC Furnish more performance for RF amp 10W General performance Internal Modular System Forced air cooling Precorrection with three slope control on front panel e Predisposition to professional precorrector it furnish more performance at 10W Synthesized oscillator with 25Hz step precision 1Hz Low noise Low cost The principal function are regulated from front
13. the cell 4 The adjustment of BIAS is nothing when the trimmer is fully rotated clockwise The adjustment of LEVEL is nothing when the trimmer is fully rotated counter clockwise The adjustment of PHASE is nothing when the trimmer is centrally located For the adjustment of this cell is recommended to operate as follows With nothing BIAS and nothing PHASE completely turn the LEVEL trimmer clockwise e Rotate the BIAS trimmer counter clockwise up to see the first effects Adjust the PHASE Adjust standard pre correction This pre corrector consists of 3 cells each of which has 3 settings Each cell acts on a specific video signal level while the settings define the type of distortion All the cells introduce an expansion distortion User Manual Rev 1 2 12 11 08 43 44 ATVST CNV RAA For the cells 1 2 and 3 The adjustment of BIAS is nothing when the trimmer is fully rotated clockwise The adjustment of LEVEL is nothing when the trimmer is fully rotated clockwise The adjustment of PHASE is nothing when the trimmer is fully rotated counter clockwise For the adjustment of each cell is recommended to operate as follows e With nothing BIAS and nothing PHASE enter the LEVEL slowly turn the trimmer counter clockwise e Rotate the BIAS trimmer counter clockwise up to see the first effects Adjust the PHASE 44 44 Rev 1 2 12 11 08 User Manual
14. the deviation level while U14B checks the state of LOCK PLL of the vco circuit Logic Function In the Logic is present U9 EPM3164 It is a programmable logic that realizes all the necessary digital functions to effect DC RESTORE PLL SOUND and hookup of the VCTXO 38 9MHZ with the external 5 MHZ if present Group Delay Function The circuit GROUP DELAY is composed from N 6 circuits cells ALL PASS whose resonance frequencies are opportunely been calculated for realizing the curve of group delay precorrection according to the various standards PAL B G D K etc the values in the scheme are to the standard PAL B G In particularly U7 is an amplifier that has been inserted after the first group of 3 cells of delay with the purpose to adjust the output gain and equalizer the band Rev 1 2 12 11 08 User Manual R n n ATVST CNV 9 3 5 PWS Function The connector is brought with all the various signals measures commands and controls and power supply Besides the regulators are present to stabilize the 5VD 5VD 3 3VD 5VA The 15V is alone filtered 8 4 Up converter board Functional Description Up converting frequency traslation of IF Audio Video carriers to UHF band ie operative uhf channel Selective filterirng with tunable high O passive filter e Rf amplification to adeguate level for RF final amplifier driving F level input 0 dBm typical 50 Ohm Frequency synthetizer PLL Loca
15. 0 44 CHANNEL mid freq 177 50 184 50 191 50 198 50 205 50 212 50 219 50 226 50 video freq MK1 175 25 182 25 189 25 196 25 203 25 210 25 217 25 224 25 audio freq MK2 180 75 187 75 194 75 201 75 208 75 215 19 222 19 229 75 Rev 1 2 12 11 08 notch freq MK3 214 15 221 15 228 15 235 15 242 15 249 15 256 15 263 15 f min 174 00 181 00 188 00 195 00 202 00 209 00 216 00 223 00 f max 181 00 188 00 195 00 202 00 209 00 216 00 223 00 230 00 User Manual B W B ATVST CNV 11 External Adjustment 11 1 Operation for the setting of pre corrector 11 1 1 Introduction The calibration of the pre corrector must be performed by qualified and experienced Staff The ATVST CNV can be supplied with two types of pre correction card they called respectively standard pre corrector and optional pre corrector 11 1 2 Tools One spectrum analyzer One TV analyzer One dummy load One video signal generator Cables and various tools 11 1 3 Procedure 1 Verify the type of pre corrector installed Check on the right side of the eguipment if are present 12 trimmer this identified that is installed the optional pre corrector Otherwise is installed the standard pre corrector Satandard pre corrector Optional pre corrector User Manual Rev 1 2 12 11 08 41144 ATVST CNV LORY 2 Setup Spectrum Analyzer TV analyzer E Ampl
16. 00 854 00 CRASH TELEVISION f max 478 00 486 00 494 00 502 00 510 00 518 00 526 00 534 00 542 00 550 00 558 00 566 00 574 00 582 00 590 00 598 00 606 00 614 00 622 00 630 00 638 00 646 00 654 00 662 00 670 00 678 00 686 00 694 00 702 00 710 00 718 00 726 00 734 00 742 00 750 00 758 00 766 00 774 00 782 00 790 00 798 00 806 00 814 00 822 00 830 00 838 00 846 00 854 00 862 00 User Manual BW Ba ATVST CNV TELEVISION 10 3 2 Standard B G PAL UHF CHANNEL mid freq video freq audio freq notch freq min freq max freq MK1 MK2 MK3 14 473 00 471 25 475 75 517 00 470 00 476 00 15 479 00 477 25 481 75 523 00 476 00 482 00 16 485 00 483 25 487 75 529 00 482 00 488 00 17 491 00 489 25 493 75 535 00 488 00 494 00 18 497 00 495 25 499 75 541 00 494 00 500 00 19 503 00 501 25 505 75 547 00 500 00 506 00 20 509 00 507 25 511 75 553 00 506 00 512 00 21 515 00 513 25 517 75 559 00 512 00 518 00 22 521 00 519 25 523 75 565 00 518 00 524 00 23 527 00 525 25 529 75 571 00 524 00 530 00 24 533 00 931 25 535 75 577 00 530 00 536 00 25 539 00 537 25 541 75 583 00 536 00 542 00 26 545 00 543 25 547 75 589 00 542 00 548 00 27 551 00 549 25 553 75 595 00 548 00 554 00 28 557 00 555 25 559 75 601 00 554 00 560 00 29 563 00 561 25 565 75 607 00 560 00 566 00 30 569 00 567 25 571 75 613 00 566 00 572 00 31 575 00 5 3 25 977 75 619 00 572 00 578 00 32 581 00 579 25 583 75 625 00 578 00 584 00 33 587 00 585 25 589 75 63
17. 1 00 584 00 590 00 34 593 00 591 25 595 75 637 00 590 00 596 00 35 599 00 597 25 601 75 643 00 596 00 602 00 36 605 00 603 25 607 75 649 00 602 00 608 00 37 611 00 609 25 613 75 655 00 608 00 614 00 38 617 00 615 25 619 75 661 00 614 00 620 00 39 623 00 621 25 625 75 667 00 620 00 626 00 40 629 00 627 25 631 75 673 00 626 00 632 00 41 635 00 633 25 637 75 679 00 632 00 638 00 42 641 00 639 25 643 75 685 00 638 00 644 00 43 647 00 645 25 649 75 691 00 644 00 650 00 44 653 00 651 25 655 75 697 00 650 00 656 00 45 659 00 657 25 661 75 703 00 656 00 662 00 46 665 00 663 25 667 75 709 00 662 00 668 00 47 671 00 669 25 673 75 715 00 668 00 674 00 48 677 00 675 25 679 75 721 00 674 00 680 00 49 683 00 681 25 685 75 727 00 680 00 686 00 50 689 00 687 25 691 75 733 00 686 00 692 00 ol 695 00 693 25 697 75 739 00 692 00 698 00 52 701 00 699 25 703 75 745 00 698 00 704 00 93 707 00 705 25 709 75 751 00 704 00 710 00 54 713 00 711 25 715 75 757 00 710 00 716 00 55 719 00 717 25 721 75 763 00 716 00 722 00 56 725 00 723 25 127 15 769 00 722 00 728 00 57 731 00 729 25 193 75 775 00 728 00 734 00 58 737 00 735 25 739 75 781 00 734 00 740 00 59 743 00 741 25 745 75 787 00 740 00 746 00 60 749 00 747 25 19115 793 00 746 00 752 00 61 755 00 753 25 757 75 799 00 752 00 758 00 62 761 00 759 25 763 75 805 00 758 00 764 00 63 767 00 765 25 769 75 811 00 764 00 770 00 64 773 00 771 25 775 75 817 00 770 00 776 00 65 779 00 17 28 791 75 823 00 776 00 782 00 66 785 00
18. 25 607 25 615 25 623 25 631 25 639 25 647 25 655 25 663 25 671 25 679 25 687 25 695 25 703 25 711 25 719 25 1727 25 735 25 743 25 751 25 759 25 767 25 775 25 783 25 791 25 799 25 807 25 815 25 823 25 831 25 839 25 847 25 855 25 audio freq MK2 476 75 484 75 492 75 500 75 508 75 516 75 524 75 532 75 540 75 548 75 556 75 564 75 572 75 580 75 588 75 596 75 604 75 612 75 620 75 628 75 636 75 644 75 652 75 660 75 668 75 676 75 684 75 692 75 700 75 708 75 716 75 724 75 732 75 740 75 748 75 756 75 764 75 772 75 780 75 788 75 796 75 804 75 812 75 820 75 828 75 836 75 844 75 852 75 860 75 Rev 1 2 12 11 08 notch freq MK3 510 15 518 15 526 15 534 15 542 15 550 15 558 15 566 15 574 15 582 15 590 15 598 15 606 15 614 15 622 15 630 15 638 15 646 15 654 15 662 15 670 15 678 15 686 15 694 15 702 15 710 15 718 15 726 15 734 15 742 15 750 15 758 15 766 15 774 15 762 15 790 15 798 15 806 15 814 15 822 15 830 15 838 15 846 15 854 15 862 15 870 15 878 15 886 15 894 15 f min 470 00 478 00 486 00 494 00 502 00 510 00 518 00 526 00 534 00 542 00 550 00 558 00 566 00 574 00 582 00 590 00 598 00 606 00 614 00 622 00 630 00 638 00 646 00 654 00 662 00 670 00 678 00 686 00 694 00 702 00 710 00 718 00 726 00 734 00 742 00 750 00 758 00 766 00 774 00 782 00 790 00 798 00 806 00 814 00 822 00 830 00 838 00 846
19. 8 MHz zi 25 147 dB Brb 758 MHz CH Markers 1 82958 dB Br i 258 MHz 283678 dB 676 758 MHz START 624 868 gpa MHz STOP r24 888 466 MHz PAL B G CH46 Plot PAL B G of Filter Channel UHF Version 21 Jul 2885 B8 55 17 ERT Sii LOG 146 dB REF dB 2 43880 dB sei LOG 146 dB REF dB 2 50 868 dE TA2 158 468 MHz CHL Markers 1 21 386 dB 663 258 MHz 2 274 r52 dB DEG 50 MHz CH2 Mark ers 1 96978 dB 663 258 MHz 2 1 80115 dB BE 38 MHz IN 1 CENTER 666 888 HAH MHZ SFAH 166 468 opp MHz NTSC M CH45 Plot NTSC M of Filter Channel UHF Version User Manual Rev 1 2 12 11 08 37 44 ATVST CNV 10 3 Tables 10 3 1 38 44 Standard M NTSC UHF CHANNEL 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 A1 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 mid freq 474 00 482 00 490 00 498 00 506 00 514 00 522 00 530 00 538 00 546 00 554 00 562 00 570 00 578 00 586 00 594 00 602 00 610 00 618 00 626 00 634 00 642 00 650 00 658 00 666 00 674 00 682 00 690 00 698 00 706 00 714 00 722 00 730 00 738 00 746 00 754 00 762 00 770 00 778 00 786 00 794 00 802 00 810 00 818 00 826 00 834 00 842 00 850 00 858 00 video freq MK1 471 25 479 25 487 25 495 25 503 25 511 25 519 25 527 25 535 25 543 25 551 25 559 25 567 25 575 25 583 25 591 25 599
20. BLUE VIDEO mod ATVST CNV Kess CC O Manufactured by TELEVISION Italy File Name 03_ATVST CNV_ING_1 2 indd Version 1 2 Date 11 12 2008 Revision History Document History 07 12 2007 First Edition Internal or external adjustment E Montagna 01 07 2008 1 1 AUUGNGUTI 11 12 2008 VHF version integration E Montagna ATVST CNV User Manual Version 1 2 Copyright 2007 2008 R V R Television Via del Fonditore 2 2c 40138 Bologna Italia Telephone 39 051 6010506 Fax 39 051 6011104 Email info rvr it Web www rvr it All rights reserved Printed and bound in Italy No part of this manual may be reproduced memorized or transmitted in any form or by any means electronic or mechanic including photocopying recording or by any informa tion storage and retrieval system without written permission of the copyright owner B W B ATVST CNV Table of Contents 1 Preliminary Instructions 1 2 Warranty 1 3 First Aid 2 SH Treatment of electrical shocks 2 3 2 Treatment of electrical Burns 2 4 Unpacking 3 4 1 General Description 3 42 Composition 4 5 Installation and configuration procedure 5 Ss Transmitter Maintenace 5 52 Management Firmware 6 6 Frontand Rear Panel Description 19 6 1 Front Panel 19 6 2 Rear Panel 20 6 3 Connector Pinouts 21 7 Technical Specifications 22 8 Operating principles 23 81 ALC 23 6 2 Display Precorrector 29 8 3 IF Modulator Board 25 9 4 Up con
21. TVST CNV 4 4 1 Unpacking The package contains m 1 ATVST CNV m 1 User Manual m 1 Mains power cable The following accessories are also available from Your R V R Dealer e Accessories spare parts and cables General Description RVR Elettronica s exciter ATVST CNV is designed for to match important parameter in broadcast world Infact principal demand of broadcasting corporation is rudgness and reliability The transmitter ATVST CNV has been built in a 19 standard rack 1U 550 mm depth The equipment is inside modularised designed for an easy maintenance and service due to a failure of one module of the system Final power amplifier is located on rear panel performed by forced air cooling The power supply unit is fitted in a box for servicing and can be easily removed in case of failure The frontal board identified as ALC PRECORRECTOR It integrate function of MOTHER BOARD ALC PRECORRECTOR and CPU The ALC PRECORRECTOR with an analogical signal present on its 15 pin connector type D can control the output power of an external power amplifier within 1dB An high performance 16 bit microcontroller is supervisor unit of all Exciter Complete information of many measurement are shown on LCD display Infact operative channel direct power to load reflect power from load voltage supply temperature of heat sink and video sync level are measurement selectable with rotary encoder on front panel A RS232
22. User Manual Br Bra ATVST CNV TELEVISION 5 2 13 Audio Level Selection Input audio level regulation DEVIATION 70 0 90 0 KHz 5 2 14 IF Audio Level Selection IF AUDIO LEVEL 70 0 5 2 15 IF Audio ON or OFF Selection gt IF SOUND OFF PREENPHASY ON PREENPHASY ON gt IF SOUND ON x User Manual Rev 1 2 12 11 08 13 44 Ren We Ra ATVST CNV RA 5 2 16 Preemphasis ON or OFF Selection IF SOUND ON gt PREENPHASY ON IF SOUND ON gt PREENPHASY OFF 5 2 17 CH Selection Channel frequency regulation Turn for change channel press to select OFFSET turn for change OFFSET enter for ESC TX CHANNEL 21 OFFSET OHz 14 44 Rev 1 2 12 11 08 User Manual Bra Bra ATVST CNV TELEVISION 5 2 18 ALC MODE Selection Indicates power control AUTOMATIC or MANUAL CH SETTING gt ALC MODE AUT CH SETTING gt ALC MODE AUT 5 2 19 IF Source INT EXT Selection External IF channel selection gt IF SOURCE INT APL ON gt IF SOURCE EXT APL OFF 5 2 20 APL ON OFF Selection APL function ON OFF IF SOURCE INT gt APL ON IF SOURCE INT gt APL ON User Manual Rev 1 2 12 11 08 15 44 L ANM ATVST CNV A 9 2 21 Economy On Off Selection Economy functio
23. V with a current of 1 2 Amp in quiescent mode for Class A 5W e 300mA in quiescent mode for Class A B 10W Two type of RF amplification are available SW and 10W The performances for 5W module are e Power gain 30dB e Band frequency 470 860 UHF vers 170 230 VHF vers Mhz e Power output 5 W p sync 50 Ohm load e lMD 8 10 16 56dBc 2W p sync senza precorrettore e Class A Rf signal is connected to input pin of input hybrid coupler IB1 Two signal of identical amplitude but guadrature phase are connected to input matching network formed by microstrip line TL1 TL2 and C1 C2 C5 TL5 is a 1 4 stub for matching Rev 1 2 12 11 08 User Manual Bra Bra ATVST CNV TELEVISION impedance and also connect Gate pin of TR1 to gate polarization circuit formed by IC1 and other passive components In particular supply voltage 28 Vcc is filtered and reduced to 12V by IC1 then a resistor divider formed by R8 R5 and Resistive trimmer R6 is used for select the quiescent drain current for LD mos TR1 This value is around 600mA Drain pin of TR1 is connected to output matching network This is formed by microstrip line TL3 TL4 and capacitors C15 C16 TL4 is a 1 4 A stub for matching impedance and also connect Drain pin of TR1 to supply voltage 28V with a Low Pass Filter formed by L1 C11 C12 Power resistor R10 is need for current sensing and for reduced Q factor of stub TL5 The other RF path for
24. al panel by rotary encoder Rev 1 2 12 11 08 User Manual B W B ATVST CNV 9 Installation and configuration procedure The equipment features an LCD with two lines by 16 characters that displays a set of menus 5 1 Transmitter Maintenace 5 1 1 Installing and Switching On Operations y Verify that the equipment earth cable is correctly connected either to a chassis ground point or to other earthing point Connect the cable to the earth clamp placed in the equipment back side y Verify by a tester that the power supply voltage is into the request tolerance and that is V 110 or 220 VAC 20 and F 50 60Hz Connect the feeder cable to the standard Europa socket placed in the equipment back side d Connect either a transmitting antenna or a load of 20W 50 ohm to the RF output connector On the DISPLAY LCD will appear all the function controls measures and the failure if present IF THE EXCITER OPERATES CORRECTLY THE FOLLOWING SITUATIONS WILL BE PRESENT All green leds on all leds red off PREC OFF led on EXT 5MHZ led on if is present 9 1 2 Preliminary Checks by Diplay Module Unpack the exciter and immediately inspect it for transport damage Ensure that all connectors are in perfect condition SIGNAL NOMINAL VALUE CONDITION O VIDEO 700mV White Signal SYNC 300 mV during the order V 26V 26V gt 26V 0 In Fault Economy OL not Lock External disable etc User Manual Rev 1 2 12 11 08
25. and serial number as well as part description and guantity R V R Television Via del Fonditore 2 2c 40138 BOLOGNA ITALY Tel 39 051 6010506 First Aid All personnel engaged in equipment installation operation and maintenance must be familiar with first aid procedures and routines 3 1 Electric shock treatment 3 1 1 If the victim is unconscious Follow the first aid procedures outlined below Lay the victim down on his her back on a firm surface the neck and tilt the head backwards to free the airway system Figure 1 Figure 1 If needed open the victim s mouth and check for breathing If there is no breathing start artificial respiration without delay Figure 2 as follows tilt the head backwards pinch the nostrils seal your mouth around the victim s mouth and give four fast rescue breaths Figure 2 Check for heartbeat Figure 3 if there is no heartbeat begin chest compressions immediately Figure 4 placing your hands in the centre of the victim s chest Figure 5 LES Gs Figure 3 Figure 4 Figure 5 One rescuer give 2 quick rescue breaths after each 15 compressions Two rescuers one rescue breath after each 5 compressions Rev 1 2 12 11 08 B W B TELEVISION Do not stop chest compressions while giving artificial breathing Call for medical help as soon as possible 3 1 2 If the victim is conscious
26. corrector The calibration of filter and the selection of channel must follow the table of frequencies in conformity with the standards in use It is important before you start checking the standard of exciter this is possible during the start up operation after that the machine is switch on 10 1 2 Tools One calibrated wattmeter to measure 10Wps One network analyzer One spectrum analyzer One dummy load 20W One video signal generator e Cables and various tools 10 1 3 Procedure 1 Verify the standard of the exciter This is important to define what table in the appendix must be taken into account User Manual Rev 1 2 12 11 08 33 44 ATVST CNV B W B 2 Setup VIDEO GENERATOR in according to the standard 3 Disabled the ALC function Enter into SETTING ALC MODE set MAN 4 Set the output power to 0 POWER LEVEL PUD MLC 0 0W MANUAL 0 0 Switch off the equipment then remove the cover Calibrate the filter of channel on the up converter card Filter of channel Q o o KJ CH o ADAPTER ADAPTER NOTCH E N
27. e for frequency modulation audio radio broadcasting Its operating frequencies are not harmonised in designated user countries Before operating this equipment user must obtain a licence to use radio spectrum from the competent authority in the designated user country Operating frequency transmitter power and other characteristics of the transmission system are subject to restrictions as specified in the licence 2 Warranty La R V R Television warrants this product to be free from defects in workmanship and its proper operation subject to the limitations set forth in the supplied Terms and Conditions Please read the Terms and Conditions carefully as purchase of the product or acceptance of the order acknowledgement imply acceptance of the Terms and Conditions For the latest updated terms and conditions please visit our web site at WWW RVR IT The web site may be modified removed or updated for any reason whatsoever without prior notice The warranty will become null and void in the event the product enclosure is opened the product is physically damaged is repaired by unauthorised persons or is used for purposes other than its intended use as well as in the event of improper use unauthorised changes or neglect In the event a defect is found follow this procedure 1 Contact the seller or distributor who sold the equipment provide a description of the problem or malfunction for the event a quick fix is available Sellers and
28. eration of the board The powers will be distributed to the various DIN connectors 52x2 of the function MOTHER There are 2 regulators that stabilize the 5VD and 5VA and the 5VA The 15V is filtered only Mother Board Function The Mother Board function is the interconnection for 3 module UP Converter IF Modulator Stereo Modulator and unit of Exciter There are three 52x2 F Eurocard connector with two minicoaxial connector Not used Mother board includes also ALC rectifier amplifier and control logic for 5 MHz TXCO optional High Stability oscillator Rev 1 2 12 11 08 User Manual BW Ba ATVST CNV 8 2 8 3 8 3 1 Display Precorrector Provides user interface consists of display led and rotatory switch It furthermore includes standard precorrector composed of 9 adjustments divided into three cells The precorrector is composed from N 3 cells for the distorsion where for each they are available the regulation of BIAS phase and amplitude The insertion and the disconnection of precorrector can be done selecting the menu from the rotatory switch The precorrector function is realized through a circuit to diodes commonly used that it produces the necessary precorrection to according to of as the diodes are polarized IF Modulator Board Functional Description e Video if carrier generator Audio if carrier generator Video and Audio modulation Analog processor for sync extraction Video and sy
29. he and Q components are summed and put out The distortion type control is implemented by 12 trimmer seats on the side of equipment These trimmers are organized into four cells each one has three settings Bias Phase and Gain Each cell works in a certain range of input signal in particular one cell working on White level one on Gray level and one on Black level the fourth is used to perform a compression on the black level User Manual Rev 1 2 12 11 08 31 44 ATVST CNV LR 9 Module identification ATVST CNV is made up of several modules connected through connectors to facilitate maintenance and replacement if needed 9 1 Top view The figure below shows a top view of the equipment and component locations Figure 9 1 1 Directional Coupler 2 5 10W Amplifier 3 Filter 4 Power Supply 5 ALC Board 6 IF Modulator Board 7 Up Converter Board 32 44 Rev 1 2 12 11 08 User Manual BW Ba ATVST CNV 10 Internal Adjustment 10 1 Operation for the change of channel 10 1 1 Introduction The procedure about change of channel must be performed by qualified and experienced staff Moreover since some calibration must be executed you must work within an equipped laboratory The operations to be performed can be summarised in the following three steps e Calibrate the filter of channel on the up converter card Set the new channel on the display Adjust the reading power e Calibrate the pre
30. he amplification system 12 Calibrate the pre corrector In any operation for the change of channel is necessary to adjust the pre correction to optimize the intermodulations 10 2 Calibration for the filter of channel Network analyzer TAIN rh WIE SS Q CU de Kg O K CH on CELL 3 ADAPTER WL ED x TH IE D lt A Es c N OUT Attenuator 10 20dB Before connecting the filter with the instrument is necessary to perform the procedure of normalization to eliminate undesirable effects of cables This consists of two points User Manual Rev 1 2 12 11 08 35 44 ATVST CNV 88 e Normalization of S11 e Normalization of S21 It is also need to set the instrument with the following setting Central frequency MK1 MK2 MK3 for details see chap 8 3 Span at 100MHz e 11 at 10dB div 21 at 10dB div Tuning Input SES Output Adapter h Adapter S ADAPTER Q zZ ADAPTER 9 C qc s qc N P N T0982 11 Filter Channel UHF Version Input Tuning Tuning Adapter coupler 1 coupler 2 Tuning Tuning Tuning Output line 3 Adapter 7 N d d C C7 ADAPTER ADAPTER COUPLER 1 COUPLER2 Filter Channel VHF Version 36 44 Rev 1 2 12 11 08 User Manual BW Ba ATVST CNV 21 Jul 2888 85 45 66 CHL 41 LOG im dB REF B dE S 3 3498 dB SAL LOG 146 dB REF D dE 2 4 9 68 dE r18 158 aga MHz CHL Markers 1 22 554 dB Bf 1 25
31. ifier optional 3 Enabled the ALC function Enter into SETTING ALC MODE set AUT 4 Enabled the ALC function Enter into PRECORRECTOR gt set ON 5 Verify that the setted power is the same of working power Adjust the pre corrector see chap 11 1 3 1 or 11 1 3 2 based on the own pre corrector 11 1 3 1 Adjust optional pre correction This pre corrector consists of 4 cells each of which has 3 settings Each cell acts on a specific video signal level while the settings define the type of distortion The cells from 1 to 3 introduce an expansion distortion while the cell 4 introduces a compression distortion Each cell has three settings bias phase and level With the trimmers of bias and level is possible adjust the type of distorition while with the trimmer of phase is possible to compensate for the phase 42 44 Rev 1 2 12 11 08 User Manual BW Ba ATVST CNV 11 1 3 2 For the cells 1 2 and 3 The adjustment of BIAS is nothing when the trimmer is fully rotated clockwise The adjustment of LEVEL is nothing when the trimmer is fully rotated counter clockwise The adjustment of PHASE is nothing when the trimmer is centrally located For the adjustment of each cell is recommended to operate as follows e With nothing BIAS and nothing PHASE enter the LEVEL slowly turn the trimmer clockwise e Rotate the BIAS trimmer counter clockwise up to see the first effects Adjust the PHASE For
32. l Oscillator e RF level output 13 dBm typical 50 Ohm Internal LO Monitor 10dBm typical 50 Ohm e RF synthetizer PLL generator for local frequency source in up convert process e Fine and coarse tuning function with internal high performance pll e Out locking detector for inhibit RF amplifier in no locking condition e Internal high stability TACO for very low drift frequency long term stability Very low phase noise VCO for high spectral purity short term stability 8 4 1 UP CONV Function In the output it is present connector RF OUT MOX the input signals IF IN and other Control Signals originate from connector DIN 52x2 IF IN signal is filtered by LOW Pass Filter and envoy to the Mixer U11 ELCM 25MH that it effects the Up Converter using the signal LO IMP coming from the VCO In the board the are present stadiums amplifiers RF U12 and U13 among which a diodes attenuator pin D2 has been inserted D3 HSMP3914 The output of U13 goes toward the connector MCX J5 and it represents RF Output The output level is checked by the CPU through the CTRL ALC signal 9 4 2 VCO Function The VCO is a component of purchase U16 MWO512 The output goes to a divider 6dB they output are respectively amplified by U15 and U17 AG403 86 The circuit of PRE SCALER setted to divides for 10 it allows the function of PLL User Manual Rev 1 2 12 11 08 27144 ATVST CNV RAA 8 4 3 8 4 4 8 4 5 8 5 28 44 Logic F
33. ly 2 AIR FLOW Air grille 3 IF IN BNC Male IF external input 4 RFIN RF Input Repeater configuration 5 VIDEO IN BNC Female Video input 6 LEFT Mini XLR 3 pin audio connector Audio input left channel 7 RS232 DB9 Female RS232 connector 8 FUSE MAINS Mains power supply fuse 9 5 MHZ IN BNC female External 5Mhz input 10 5 MHZ OUT BNC female 5Mhz output 11 RIGHT Mini XLR 3 pin audio connector Audio input left channel 12 TELEMETRY DB15 Female IN OUT Telecontroller signal 13 RF OUT N type RF ouput connector 20 44 Rev 1 2 12 11 08 User Manual LR ATVST CNV 6 3 Connector Pinouts 6 3 1 RS232 Type Female DB9 NC SDA O OO JO Q GQ N G lt UO 6 3 2 Left Right Type Female mini XLR 1 GND E 2 Positive x itiv Negative User Manual Rev 1 2 12 11 08 21 44 ATVST CNV B W B 7 Technical Specifications General Freguency range 470 860 MHz UHF version 5 W power amplifier IMD 8 10 16 dB 56 dB 2 W pre correction off IMD 8 10 16 dB 65 dB 2 W pre i 10 W power amplifier IMD 8 10 16 dB 52 dB 10W pre correction off IMD 8 10 16 dB Video Input level Vpp 750 Differential gain 5 Differential phase 5 Group delay 50 nS Level frequency response 0 5 dB ignal to noise rati lt B weigh MAN A l r JH JA Audio Inputlevel _ _ _ OdBmz6db 6000 optional40 KO Level freguency
34. med by TR2 is identical The two quadrature signal are combined in output hybrid coupler IB2 The power signal is available to pin out of IB2 In mismatching out situation reflected power go into inbalance power resistor connected to load pin of IB2 The performances for 10W module are e Power gain 30dB e Band frequency 470 860 UHF vers 170 230 VHF vers Mhz e Power output 10 W p sync 50 Ohm load e lMD 8 10 16 54dBc 5W p sync senza precorrettore e Classe A B 8 6 Power Supply Unit Functional Description Switching power supply is a power conversion unit High efficency conversion device are used Is full range with power supply from 90 to 230VAC Circuital configuration is non isolated Forward Bucktype Operative frequency of 70 KHz is used for reducing magnetic an capacitive loss in components Magnetic loss in ferrite core are low for used freguency and magnetic flux sweep density Fast recovery diode are used for more efficient conversion Monolithic IC are used This switching regulator offer also thermal protection and overload protection TO220 case of all regulator are mounted in main heatsink There is a monolithic temperature sensor for temperature monitoring of main heatsink 8 7 Directional Coupler Functional Description e Directional coupler is used for measurement level of Direct Power and Reflected Power This information is send to CPU Display unit for easy readout
35. n ON OFF gt ECONOMY ON TIMER gt ECONOMY OFF TIMER 5 2 22 Timer Selection In this menu you can select the date and time to switch the IF input between internal and external gt DATE SET TIMER 1 TIMER 1 ON gt SET TIMER 2 gt TIMER 2 ON ESC 16 44 Rev 1 2 12 11 08 User Manual VE AC ATVST CNV 5 2 23 Time Selection Rotating the knob we can regulate the parameters Push to confirm TIME 10 21 50 5 2 24 Date Selection Rotating the knob we can regulate the parameters Push to confirm DATE 10 10 07 5 2 25 Set IF Ext Selection Rotating the knob we can regulate the switching hours Push to confirm IFEXT gt 21 24 5 2 26 SetlF Int Selection Rotating the knob we can regulate the switching hours Push to confirm IFINT gt 21 24 User Manual Rev 1 2 12 11 08 17 44 ATVST CNV Ra 5 2 27 SetlF Int Selection Rotating the knob we can regulate the switching hours Push to confirm IFINT gt 21 24 5 2 28 Status Alarms Selection In this screen it visualizes the list of the possible alarms Alarm 1 1 TX OL UNLOCKED 18 44 Rev 1 2 12 11 08 User Manual R Kai aWa R ATVST CNV 6 Front and Rear Panel Description This section describes the components found on the front and rear panel of ATVST CNV
36. nc level acquisition e White and black clipping block Group delay correction Audio preenphasis correction Video audio intercarrier PLL logic e Video Carrier frequency 39 9 PAL B G 45 75 NTSC M MHz e Audio Carrier frequency 33 4 PAL B G 41 25 NTSC M MHz e Audio input impedance 600 Ohm 1 KHz e Video inputimpedance 75 Ohm IF output level 0 dBm typical 50 Ohm Vision Function The signal Video enters through the Connector MCX J1 and it goes to the varying gain amplifier U29 LMH6504 The output of amplification goes to the circuit DC RESTORE U23 EL4093 The output of DC RESTORE drives the circuit WHITE CLIPPER U24 AD8036 The signal so essay is modulated to 38 9 MHZs by the circuit U26 MC1496 Balanced Modulator The signal so gotten is filtered by the filter SAW FLT1 that it eliminates the lateral band and it realizes the vestigial modulation VSB The filter SAW attenuates around 30dB so to output filter has been inserted an amplifier U27 AG30363 The regulations of the threshold of the WHITE CLIPPER and the input Video Gain are realized by the electronic trimmer U25 AD5242 that it is checked by the CPU User Manual Rev 1 2 12 11 08 25 44 ATVST CNV RAA 8 3 2 8 3 3 8 3 4 26 44 In this board the circuits are inserted also Synchronisms detector U21 LM1881 circuit for indication of the happened WHITE CLIPPER U20 LM393 and synchronism level measure circuits
37. or expander e Luminance predistortion 0 gt 10090 Phase variation of luminance signal ALC function with programmable attenuator in feedback mode with rf directional coupler Automatic or manual commutation through timer on external IF CPU Function The function CPU is realized by MICROCONTROLLER PIC 18F8620 from the MICROCHIP U12 This processor realizes all the measures the signalings and the necessary controls to the correct operation of the apparatus besides the CPU communicates with the outside through a serial port RS232 U15 The CPU also manages the visualization on the display 2 lines for 16 characters and the ROTARY SWITCH It is implement the software operational of the AUTOMATIC LEVEL CONTROL on the outout power Here are present all the signals of measure and there are the 2 peak detectors that respectively measure the PUD RF and PUR RF Besides the connector is present for the remote controls and the indications 5MHZ Function The SMHZ RF contains the necessary circuits to recognize the presence or less than a external 5MHZ or a HIGH STABILITY BOARD Rif 5MHZ TXCO OPTIONAL The automatic commutation gives priority to the presence of the external 5MHZ in lack of this the inside reference is selected Optional If both are not present the led SMHZ present on the outside it will be off PWS Function In this board is present the Power Connector J10 It goes to the powers necessary to the op
38. rovided to ensure reliable operation and prevent overheating do not obstruct or cover these slits Do not obstruct the ventilation slits under any circumstances The product must not be incorporated in a rack unless adequate ventilation is provided or the manufacturer s instructions are followed closely A WARNING This equipment can radiate radiofrequency energy and if not installed in compliance with manual instructions and applicable regulations may cause interference with radio communications A WARNING This equipment is fitted with earth connections both in the power cord and for the chassis Make sure both are properly connected Operation of this equipment in a residential area may cause radio interference in which case the user may be required to take adequate measures The specifications and data contained herein are provided for information only and are subject to changes without prior notice R V R Television disclaims all warranties express or implied While R V R Television attempts to provide accurate information it cannot accept responsibility or liability for any errors or inaccuracies in this manual including the products and the software described herein R V R Television reserves the right to make changes to equipment design and or specifications and to this manual at any time without prior notice Notice concerning product intended purpose and use limitations This product is a radio transmitter suitabl
39. unction The integrated circuit U6 EPM3064 is a programmable logic that realizes the functions of PLL for the hookup to the various frequencies of channel UHF VHF Its reference is an oscillator VI CXO 38 9MHZ that it can be hooked to the external 9MHz if it present The circuit U7B is the filter of the PLL Logic Function The integrated circuit U1 AD9952 is a DDS Direct Digital Sinthesis It is a fractional digital divisor it is as freguency generator of reference for hooking the PLL to the freguency of channel volute The resolution of this integrated allows to effect the Precision Offset in the case is present the reference external 5MHZ The freguencies produced by such component are edual to the freguency to the channel freguency to divide 10 PWS Function The connector is brought with all the various signals measures commands and controls and power supply Besides the regulators are present to stabilize the 3 3VD 5VD The other tensions are alone filtered RF amp unit Functional Description e Final RF Power Amplifier is need for power amplification of rf signal This unit give a gain of 30 dB over 470 860 UHF vers 170 230 VHF vers Mhz broadcast band Input and output impedance matching is very good for hybrid couplers used Rf semiconductor are LD mos transistor with high gain Low intermodulation distortion and low thermal resistance They are ideal for ultralinearity application The supply voltage is 32
40. verter board 27 9 5 RF amp unit 29 8 6 _ Power Supply Unit 29 8 7 _ Directional Coupler 29 8 8 Optional Precorrector 30 9 Module Identification 32 91 Top View 32 10 Internal Adjustment 33 10 1 Operation for the change of channel 33 10 2 Calibration for the filter of channel 35 10 3 Tables 38 11 External Adjustment 41 11 1 Operation for the setting of pre corrector 41 User Manual Rev 1 2 12 11 08 ATVST CNV Rev 1 2 12 11 08 CRASH TELEVISION This page was intentionally left blank User Manual CRASH TELEVISION ATVST CNV IMPORTANT lt The lightning flash with arrowhead within a triangle is intended to alert the user of the presence of dangerous voltage that may constitute a risk of electric shock The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the equipment User Manual 1 Preliminary Instructions General Warnings This equipment should only be operated installed and maintained by trained or qualified personnel who are familiar with risks involved in working on electric and electronic circuits Trained means personnel who have technical knowledge of equipment operation and who are responsible for their own safety and that of other unqualified personnel placed under their supervision when working on the equipment
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