Adret 730A maintenance manual part I
Contents
1. EDEN 0107308301 1 iranga CONTINUOUS FM BOARD adret electronique SYNOPTIQUE 2 e a a e e a qe o 5 gt a SS 8 e 9 n 9 eee e e qe gt 9 9 a s e e a 0 fa al A 5 9 9 9 on BUS 80 MHz output 80 MHz from Modulations board 0107308301 2 e a e a e cre s e qq P T 2 0 747 7 7 2 a e o 9 2 o o a o o e QOO DO OE 8 MHz No 80 MHz signal or weak signal on output Level adret Siectronique CONTINUOUS FM BOARD 1 Flowchart 1 at PIS p Check PIN correct diode switch no yes 2 Check filter correct adjustment no Level yes Check at PT3 1 frequency correct doubler no ma eso at correct 06 and 07 no Check control at PI6 and oscillator 0107308301 3 CONTINUOUS FM BOARD adret icc mne Flowchart 2 No FM Modulation Check 80 MHz oscillator LF present at PT1 Check linearizer 0107308301 4 adret electronique 10 000 STEPS BOARD 10 000 STEPS BOARD The 10 000 Steps board generates the increments from 1 Hz to 9 999 kHz or 9999 steps Frequency resolution of the 730 15 1 Hz An 80 120 MH2. board range switching yes Fault in analogical board no fault in ana logical board LF INT no LF amplitude to 400 Hz 2 g yes Fault on analogical board fault in board 80 MHz oscillator loop Out of synchronis yes fault in 400 MHz generator no arr et electronique CONTINUOUS FM BOARD CONTINUOUS BOARD This board generates an 80 MHz FM frequency with bandwidth ranging from continuous to 10 kHz of Fo It is substituted for an 80 MHz nonmodulated or AM signal for 80 MHz FM or signal Description An 8 MHz quartz oscillator is frequericy modulated by a voltage applied on varicap BB 809 which modifies the capacity of the quartz oscillating circuit The signal is linearized by two operational amplifiers 2 and A3 and a type AD534 H linearizing circuit which compensates for the varicap fault in linearity Amplifier A2 corrects the term in 2 2 Its gain is adjustable from 1 to 1 Amplifier A3 corrects the term in x by P3 Its gain is adjustable from 4 to 4 The output drives the current of one of the sections of a current block made up of transistors BC416 and 414 designed to apply the corrective terms to amplifier A4 and shift the continuous audio frequency signal this may take place with a correction cell link if applicable R
3. v m lt Z M lt se Z gt 347 Z lt Oo a Z T o 7 2 lt gt adret electronique CONTENT CHAPTER VI 22 MAINTENANCE nn ir names VI 1 3 Continuous FM board 0107308301 1 10 000 Steps board 22 0274750000 1 200 Steps 0274760000 1 u Phase lock Oscillator 0274770000 1 2 MHz Steps 0274780000 1 0274800000 1 E s PALO 0274810000 1 d 400 MHz Generation board 0274990000 1 i VHF Module 0275200000 1 Attenuator Assembly uu E 0275710000 1 480 MHz Generation Module 0276450000 1 ss adret electronique CHAPTER VI MAINTENANCE J FAULT FLOWCHARTS Fault flowcharts have been established for each instrument function showing the faults most likely to occur in order to facilitate the repair of the instrument d They indicate the checks to be made and localize faults to the suspect 7 module sub assembly or connection 1 1 Faults affecting the display 2 Faults affecting RF frequency 1 3 Faults affecting output amplitude J 4 Faults affecting AM modulation 5 Faults affecting FM and modulations e 1 i l Lanta
4. MODULE adret electronique ATTENUATOR ASSEMBLY 3 n les ety TEI Dom f 1 1 m ATTENUATOR ASSEMBLY 1 F samenon i 1 The damper module features seven damping cells controlled by 15 V power i i narret 0 V Damping 15 V Direct throughput The output breaker operates in two stages 1 provides instant protection by limiting diode and zener 2 Cutoff by a relay controlled by a threshold H i 1 CCR j E ised p 1 0275 710000 1 af ge 8287 nn Re elerctronigue anuos i aliret J j E a E T wt DI K T ILS Ne E ATTENUATOR ASSEMBLY e 6 R 0275710000 2 i E L 5 adret electronique 480 MHz MODULE 480 MHz GENERATION MODULE This module generates certain time base frequencies necessary to 730 operation These frequencies are the following d 80 MHz used in the Modulations board 80 MHz used in the 2 MHz Steps board 480 MHz used in the 400 MHz 80 MHz board 80 MHz frequencies result from separation in an 80 MHz transformer output by the quartz oscillator E The 480 MHz frequency results from multiplication by 2 M1 and multipli cation by 3 in
5. i L ERE TIER false frequency TIL level at PIS 5 Absence of signal at PT4 or level lt 14 dBm JV Absence of N signal at 2 or levelz 6 dBm Absence of Signal at PT3 or evel lt 25 dBm absence of signal on Q5 collector levele 20dBm yes Absence of Signal at output 2 of SN yes Absence of signal on input 6 i of SN d yes adret Sec tr undue no no no no no 0274780000 3 Flowchart See slaving board Check output 15 of SNO4 Check SN8 Check 06 5103 SNO2 and 5801 Check 111 112 173 Check 05 04 11 115 and 02 Check SN7 Check 01 and presence of 80 MHz signal 2 MHz STEPS BOARD M rnm Kare Pe de iat tta adret electronique MODULATIONS MODULATIONS BOARD This board generates the modulation functions used in the 730 In FM and QM modes an 80 MHz oscillator slaved with a low bandwidth is substituted for the 80 MHz master oscillator FM and M modulation is carried out on this oscillator Operation of the 80 MHz oscillator is enabled by bits FM FM 10 and which additionally ensure inhibition of 80 MHz master oscillator amplifier A1 In FM mode the 80 MHz frequency is divided by 8 in Di SN11 and then by 500 in D2 S
6. SINGAPOUR SINGAPORE COSMOTEC ENTERPRISES LTD 70 Bendemeer Road Hiap Huat House 05 04 SINGAPOUR 1233 T l 65 2967166 36992 SUEDE SWEDEN SAVEN AB Nytorpsvagen 30 P O BOX 504 S 18325 TABY T l 87921100 Code 282 T lex 12986 SUISSE SWITZERLAND AMOTEC ELECTRONIC AG RoftluhstraBe 38 8702 ZOLLIKON T l 01 3915630 T lex 816906 Telefax 01 3915633 TAIWAN CATHAY ENTERPRISE CO Ltd BOX 1778 102 Thun hua Road TAITEI T l 886 7310558 T lex 22392 Telefax 886 7732227 12 1986
7. arem eere t i i noe taces adret lectronique Fault affecting AM modulation yes yes fault in ana ga board I N witch a Absence of modulation coax Front no Fault i analo dices board detect or indicator contro Poor calibration no Check oscillator 2 analogi cal board Failure Modu lations board AM modulator Absence of modulation Check oscillator terminal 19 of connector analo gical board LF present Check levei terminal 19 Of connector analogical board Incorrect percentage Failure on analogical board Amplitude 5 Vee F distortion Abnormal distorsion connector analogical board Abnormal distortion no See fault affecting level Check 2 regulation _ modula tions board CAM modul Fault affecting modulation Fault in external onl deviation no Poor deviation no Out of synchronis n adr eb eiecti nc aue No devistion no Poor calibration z 0scillo check on terminal 6 analogical board connector no 05 1110 check on terminal 19 analogical board connector Check LF amplitu de at terminal 1 analogical bo
8. Check CPU board and or front Check SN2 panel control _ 0274810000 5 ANALOG BOARD adret iier Giu Ye Flowchart in level operating Analogical control Wrong DC voltage on amplifier module control Check intercon nection between board and module and the corresponding connector Check SN4 SN5 di d voltage control signal idi c defective yes gt Check CPU board and or front Check 512 4 panel control L 0274810000 6 adret electronique 400 MHz GENERATION BOARD I 1 f 1 L 5 400 MHz GENERATION BOARD This board generates the 400 MHz frequency necessary for heterodyning in the VHF module in order to obtain the output frequency for the 730 and detect and linearize AM modulation Filter FL1 whose design is the same as that used in the 480 MHz rack 3 filters the 480 MHz frequency with two additional poles in order that this signal may be applied over the switched 1 channel with a minimum of 400 MHz and 560 MHz components The 80 MHz frequency is input over the linear channel this frequency features two modulations and is amplified in 1 and filtered by FL2 in order to have a minimum of harmonic dis torsion on the input of Mi Mixer 1 works as a subtractor in order to select the 400 MHz frequency 1 This latter is filtered by FL3 an
9. GmBh Sch tzenweg 62 D 6305 GROSSEN BUSECK T l 64 08 2081 Code 299 T lex 484 296 ARGENTINE ARGENTINA RAYO ELECTRONICA 1092 BUENOS AIRES Belgrano 990 T l 01 381779 T lex 22153 AUSTRALIE AUSTRALIA VICOM INTERNATIONAL PTY 57 City Road South Melbourne VICTORIA 3205 Tol 03 626 931 l lex 30935 Telefax 61 3522325 AUTRICHE et EUROPE DE L EST EAST EUROPE S P E A GES m b H Stiftgasse 27 A 1100 WIEN T l 222 62 61 41 Telex 116 084 BELGIQUE et LUXEMBOURG Belgium and Luxembourg SAIT ELECTRONICS 1190 BRUXELLES 66 Chauss e de Ruisbroek T l 02 376 20 30 Code 280 T lex 61807 BRESIL BRAZIL GRADIENTE ELECTRONICA LTDA Staub Agency Division Rua Sorocaba 316 CEP 22271 HOTAFOGO DE JANEIRO T l 21 286 8722 T lex 21 21131 CANADA AIM ELECTRONICS INC 376 Churchill Avenue Suite 108 OTTAWA ONTARIO K1Z 5C3 T l 613 7228286 Code 284 514 3322762 Montr al T lex 534862 DANEMARK DENMARK METRIC A S Skodsborgvej 305 D K 2850 NAERUM T l 02 80 4200 Code 285 T lex 37163 ESPAGNE SPAIN TELCO Gravina 27 MADRID T l 01 231 71 01 Code 279 T lex 27348 ETATS UNIS UNITED STATES COMSTRON CORP 10 Hub Drive MELVILLE NEW YORK 11747 T l 516 756 1100 T lex 4973525 Telefax 516 756 1167 FINLANDE EINBAND ORBIS OY Sorolantie 1
10. 400 MHz 80 MHz C1 LF 10 Vc c 8 1 01 o analogical board Q inhibition D2 NS gain fM 1 Phase adjustmeet Sana ___ 5 4 20 kHz to analo L gical board ERN 0 inhibition BF 5 Vc c analogical board adjustment fM 2 1 4 M Control LATCH 4 F1 logical CONTROL 0 inhibition Lt l e 10 MHZ MODULATIONS CONTROL P E AM rN FM 10 did 0274800000 3 Ee RA Ua na AA MODULATIONS adret eeckronique CW Mode 80 MHz pilot absent in CW mode SN20 and 010 operate modulator failed no yes See 012 045 014 SN20 or 010 SN21 operates no SN21 failed 0274800000 4 ER _ MODULATIONS r i t in False and or unstable 80MHz oscillator frequency at AM modulator output in Mode FM oscillator operates k i i iet bog no d Presence of voltage 5 V DC on varicap i T t barre no Al CPF CFM operates 2 24 x f no SN6 output no 11 002 d SN4 and SN6 ai Vu arr gb electronique yes yes yes yes FM Mode See 009 and AM modulator See oscillator and SN20 See SN10 SNO and SN8 5815 output correct yes See SN1
11. CES 7 em A 0274810000 3 ANALOG BOARD adret electronique Modulations control flowchart es COtror TIOWCAart Defective audio frequency signal on terminal 21 of board connector ve LED no w Check front ned Mode panel LED Absent N or defective Check Be signal on SN7 and SN8 1 F on Check yes 5 of SN19 5820 and 5821 Absent e Check SN18 terminal 14 f SN19 yes Check SN19 ext check ib Check connection BNC connector between 7 and Vat erminal 12 of SN19 yes Presence of AF signal at PIBA yes Presence ss 7 Of AF signal N 10 Check SN14 and SN15 on terminal 2 5444 7 yes Check Modulation board operation 0274819000 4 5 adret electroanicoue _ ANALOG BOARD a _ Flowchart in level operating Attenuator control False level u at damper output bsence no See damper of damper module control _ Control no Check connector and transistors wiring between board defective and power supply yes wel no Replace defec output signal 3 tive transistors defective yes no signal Check SN3 1 defective 4 yes
12. mu board step or icoax connection VHF failure 400 580 2 47 Tian 80 MHz E _ 400 MHz board failure failure on Modu sations board or jcoax connection 2MHz step lator or icoax connection Failure in VHF module housands board VHF failure sleving Failure on Two Hundreds board adret te exe gm mmy Fault affecting RF output amplitude E no Fault yes Level no Failure gene Signal gt 19 0 400 MHz ig of 80 MHz ration board dBm output 0 dBm 400 80 MHz yes yes Go down by Check output Failure pilot signal 480 module commut 80MHz Check voltage on PIT analogical board Signal correct dBm yes Failure in attenuator or Circuit breaker function Go down by k dBm in dB with respect Alto 6 dBm 2 4 to 0 54 from 19 9 to 6 1dB a ailure VHF out but amplifier or VHF coax Atten no Check voltage on PT4 VHF Fallure on ana logical board level ref i yes Check qi k V i N of 400 MHz no Failure gene ration board 400 80 MHz Failure in failure in VHF attenuator or module out circuit breaker put amplifier VI 4 F ki i leet reete d i Rte trace f i oend
13. 966 e pe 0274779000 2 F k 4 H NEAN sospeso em i r Fy 5 adret lectronique Flowchart 396 574 MHz frequency false SN15 bits 00 to 07 i correct yes 198 287 programmed E divider correct Frequency correct at 3 of SNS yes Level at SN6 output 6 correct yes Level at PT5 correct Check connection to 396 574 oscillator no no no 0274770000 3 PHASE LOCK OSCILLATOR Check SN16 and bus input Check SNO to SN14 and SN18 Check SN4 amp SN8 and 10 MHz shaper Check 03 04 and 515 Check 541 SN3 and SN beers WE adret electronique 2 MHz STEPS BOARD d 2 MHz STEPS BOARD 4 The 2 MHz Steps board performs the following generation of 90 steps of 2 MHz between 396 MHz and 574 MHz and S positioning of the final 400 to 580 MHz oscillator on a multiple of 2 MHz selected in function of frequency coding frequency comparison device continuously checks the equality between the m frequency displayed and the frequency of the 396 to 574 oscillator This u device is made up of a double sampler For the first sampler a comb of five discreet frequencies 400 440 480 520 560 MHz is generated from an 80 MHz reference signal These five frequencies are automatically selected by a register
14. Cont rols output level It is made up of five sections Mixing of small increments and slaving of the 400 to 580 MHz oscillator 400 to 580 MHz oscillator Leve control and filtering of the 400 MHz heterodyning frequency Amplification of the 400 to 580 MHz frequency and an output mixer Final amplification and detection The 400 to 580 MHz oscillator features design identical to that located on the 2 MHz step board with frequency coverage from 396 MHz to 574 MHz so _ that the two oscillators may follow each other with a few MHz maximum of offset a condition necessary operation This oscillator features three outputs represented by three separators S1 S2 and S3 Separator S2 switches the frequency towards amplifier A7 which yields a 4 level of approximately 10 dBm on the linear channel of the switched channel of mixer M1 S3 inputs the 396 574 MHz frequency with a level of approximately 0 dBm M1 output is filtered in FL1 low pass filter of approximately 40 MHz The output frequency of this filter varies from 4 to 6 MHz and is compared T n in frequency phase comparator CPF1 to the 4 to 6 MHz frequency available on the output of the Two Hundreds board and featuring two million steps to Hz resolution E E On the output of A1 there is available a DC voltage proportional to this 7 frequency variable from 4 to 6 MHz which is
15. M2 This latter circuit is composed of a transistor operating in class C with a circuit tuned to 480 MHz in its collector This circuit is followed by a filter which damps the 400 MHz frequency by 30 dB Two E cascade amplifiers A2 and A3 supply gain of approximately 19 dB Filter FL2 eliminates the 400 MHz signal at approximately 70 dB at the module output 0276450000 1 U adret electronique 6 c 0 Pots MA w eni ra ae ome 4 ape o ee 0276450000 2 1 nement 4 adret electronique 480 MHz MODULE IRAN Flowchart 1 bsence of signal on 80 MHz outputs Presence of 80 MHz on pilot 80 MHz input See 107 01 and 001 See master oscillator MM NT 0276450000 3 480 MODULE Flowchart 2 in module output es Presence of See 05 0 480 MHz in PT1 and FLT no Presence of 160 MHz on collector of Q01 ves Bee filter H2 C9 91 10 16 and C11 no Presence of 80 MHz on Collector of D01 See 102 02 05 and 02 yes no See 001 0276450000 4 t E d 25 4 nnn a yy 1 i Garantie et Assistance Warranty and Assistance Ce produit ADRET ELECTRONIQUE est
16. garanti pour une dur e d un an compter de la date de livraison La garantie s applique aux appareils ayant subi des dommages m caniques caus s lors de l exp dition en partance de ADRET ELECTRONIQUE ou pr sentant la suite de d faillance d un l ment ou d un sous ensemble des caract ristiques non conformes aux sp cifications techniques Sont toutefois exclus de la garantie les dommages occasionn s par une utilisation anormale de l instrument Le client s engage pour sa part ne pas intervenir sur le produit pendant la p riode de garantie sous peine de la perdre d finitivement Le retour et la r exp dition de l appareil lors d une op ration de maintenance sous garantie sont pris en charge pour moiti par ADRET ELECTRONIQUE Pass le d lai de garantie la Soci t reste bien entendu au service de ses clients en leur offrant son concours pour toutes ventuelles op rations de maintenance Pour tous renseignements compl mentaires veuillez contacter votre repr sentant ADRET le plus proche les coordonn es de nos principaux agents tant donn es dans le tableau ci dessous The ADRET ELECTRONIQUE product is guaranteed for a period of one year from the date of delivery The warranty applies to equipment with mechanical damage sustained during shipping from ADRET ELEC TRONIQUE or failing to conform to the technical specification due to faulty components of sub assemblies The warranty does not
17. i 1 Absence of 400 to 600 kHz signal Signal present at PT1 no Oscillator operation no Voltage at 06 gt 2V no Apply 5 V at 06 Oscillator operation no adret electronique 10 000 STEPS BOARD Flowchart 1 Jes See SN1 SN2 SN3 and 04 je 1 See separators 02 and 03 then 11 and gt 5 See oscillator yes See CPF and amplifier See oscillator 0274750000 3 False frequency Signal correct at PT1 hb kHz reference correct no Division ratio correct no Division ratio instruction correct no See registers and decoders adr gb electronique Flowchart 2 yes yes yes 0274750000 4 See dividers SN1 SN2 SN3 and Q4 See 10 MHz shaper and dividers SN4 SN5 and SN6 See CPF and slaving amplifier Successively see outputs of 22 5820 589 SN10 5413 SN16 5818 inen 3 bemessen r i i H 1 r H i ki A i besten adret ici um 200 STEPS BOARD 200 STEPS BOARD Operat ion The 200 Steps board generates increments from 10 kHz to 1 99 MHz or 199 steps To this it adds the increment made on the 10 000 Steps board or 9 999 kHz maximum
18. selected on the front panel by the first six digits This voltage finely slaves the 400 MHz to 580 MHz TA oscillator which also receives an approach voltage on the same point enabling It to be prepositioned on the value of the 2 MHz steps also selected on the equipment front panel Fr 1 Filter F5 rejects slaving signals exceeding 70 dB on the output of CPF1 Separator S1 makes available a 400 to 580 MHz frequency on the equipment rear panel f EN Separator S3 delivers the frequency to amplifier A2 whose gain is approxi mately 20 dB a level necessary to drive the switched channel of hetero dyning mixer M2 This mixer receives a fixed frequency of 400 MHz over its linear channel this frequency includes the modulations The level of this fixed frequency is variable within a range of 14 dB with a maximum of approximately O dB for a maximum output level on the 730 of 19 9 dBm PO annerem MS marron ir aprel I 02752000001 VHF MODULE adret electronique Filter FL2 which is very narrow rejects frequencies other than the 400 MHz signal beyond 70 dB On the output of 2 filter FL3 makes an initial cutoff of intermodulation outside the band This filter is followed by preamplifier A3 whose low frequency is less than 300 Hz filter FL4 which dynamically eliminates all E undesirable frequencies above 190 MHz and power amplif
19. 5 SN10 SNO and SN8 no See 80 MHz oscillator SN11 006 SN12 007 and SN13 0274800000 5 adret electronique MODULATIONS Mode False and or unstable 80MHz oscillator frequency _ at AM modulator d output in fM Mode FM oscillator 22 See 005 and operates AM modulator no Presence gt of voltage See oscillator 5 V DC on and SN20 varicap no eer gM M See SNS SN operates and SN8 d SNT output yes SN3 output yes SN12 SNS correct correct SN7 and SN8 ng 3ee 80 oscillator 5411 and SN3 006 005 and SN1 i 3 pe E See 11 001 J274800000 2 m ee a H 1 i Asper MODULATIONS Absence of modulation at the 400 MHz output on the 400 MHz generation board Presence of AF signal at PIO no See SN16 SN19 and pin 11 signal input on connector yes adr et 2 D Presence of ignal at pin 1 of 5819 no See SN19 0274820000 7 AM Modulation failed adr et MODULATIONS Step from LF in FM and M Mode ILICE due Absence of Modu lation ON 80MHz output in FM and fM
20. 6 P O BOX 15 00421 HELSINKI 42 T l 358 05664066 Code 283 l lex 123134 GRANDE BRETAGNE GREAT BRITAIN RACAL DANA Duke Street WINDSOR BERKS SL4 158 T l 75 38 68 101 Code 274 T lex 847013 GRECE GREECE SCIENTIFIC ENTERPRISES C O 45 Agion Saranta St 18 346 ATHENES T l 1 482 34 21 T lex 221770 HONG KONG INFA 19 Austin Road TSIMSHATSUI KOWLOON KONG T l 852 5 7211151 f iex 54016 0707301202 INDE INDIA HINDUSTAN INSTRUMENTS LTD 603 Vishal Bhavan 95 Nehru Place NEW DELHI 110 019 11 6410529 T lex 31 61209 ITALIE LP INSTRUMENTS Paolo 5 20139 MILANO T l 02 5392440 Code 277 T lex 315085 KOWEIT MOYEN ORIENT ABDUL AZIZ YOUSUF ESSA et CO WLL P O BOX 3562 SAFAT T lex 23576 NORVEGE NORWAY TERCO A S PO BOX 98 N 1540 VESTBY T l 02 951000 Code 287 T lex 74464 NOUVELLE ZELANDE NEW ZEALAND NEECO 17 Adelaide Road P O BOX 9749 NEWTOWN WELLINGTON Tel 64 4858689 Telex NX 3582 Telefax 64 4850510 PAYS BAS NETHERLAND CN ROOD BV 11 13 Cort V D Lindenstraat P O BOX 42 2280 RIJSWIJK T l 70 996 360 Code 281 T lex 31238 PORTUGAL RUALDO LDA 9 15 Rua de San Jose 1198 LISBOA CODEX T l 01 373461 Code 286 T lex 16447 REP POPULAIRE DE CHINE CHINA COMPAGNIE OLIVIER Peking H tel Gui Bin Shi n 3 BEIJING T lex 22375
21. 80 MHz connector yes 400 580 MHz Q oscillator not slaved yes 396 574 Miz oscillator not slaved yes Check 2 MHz step board and troubleshoot it adret slectronique Frequency Check 400 MHz frequency at input on module connector Check to 6 MHz at input on module connection Check CPF1 A1 and approach voltage 9275209999 4 If frequency is false If frequency is false troubleshoot or check Two Hundreds board frequency output from 4 Iwo Hundreds board troubleshoot the 1400 80 MHz board edi MMC E 05 M L Defective level main output Set 19 9 dBm Power amplifier A4 correct yes Level at PT7 correct yes Level at output of modu lator SN5 correct yes Level at 16 correct voltage level yes Check level reference yes Check 585 and 5810 no no no no no no no adret electronique SN7 transistors 023 to 028 and 925 to 036 correct Check transistors 020 19 022 021 and SN8 Check 110 111 C52 C53 and R84 See modulator SNS Or incorrect level pn switched channel 80 MHz board Check SN7 See analog board 0275200000 5 Level no Troubleshoot the defective component
22. It features two oscillators The first oscillator covering the 79 6 to 119 4 range has its own independent phase loop Its frequency after division by 398 to 597 In a programmed counter is compared to a 200 kHz reference in CPF SN7 The downstream current block delivers the oscillator phase locking voltage which is also used for approach of the 80 to 120 MHz oscillator follower amplifier SN6 by means of The second 80 to 120 MHz oscillator represents the sum of the 400 to 600 kHz frequency output from the 10 000 Steps board and the 79 6 to 119 4 MHz oscillator The difference in frequency b tween the two oseil lators made in the diodes mixer is compared in CPF SNS to the 400 to 600 kHz frequency output from the 10 000 Steps board The CPF output locks the 80 to 120 MHz oscillator across integrator amplifier SN2 Circuit SN20 is an address decoder It changes the data in register SN13 which represent the instruction of the programmed divider 0274760000 1 a b adret 200 STEPS BOARD oue bo d 3 6 990 0 9100 6 HA 002 ZH 6 x iy 9 1 6 009 004 0285 NS GNS4 ssaJppy DLN S 1935163 ONS ANDILAONAS 66 866 0274760000 2 ros Absence of signa on
23. N12 and SN13 in order to be compared to the 20 kHz reference signal resulting from division of the 10 MHz master oscillator frequency by 300 in D3 SN4 and SN6 There is a DC voltage proportional to the variation in 80 MHz oscillator frequency on the output of CPF1 SN14 and 5 15 and FL1 1 2 SN10 Amplifier A5 1 2 SN10 incorporates the audio frequency signal in the slaving loop and additionally enables regulation of gain and sets the phase to 40 Hz Current amplifier A6 slaves the oscillator via switch C1 SN8 whose control is linked to the control of CPF1 GM mode the 80 MHz frequency is divided by 8 in D1 and by 4 in D4 SN1 in order to be compared to the 2 5 MHz reference signal resulting from division of the 10 MHz master oscillator frequency by 4 SN3 There is DC voltage proportional to the variation in 80 MHz oscillator phase on the output of M1 and FL2 Amplifier A8 SN5 incorporates the audio frequency signal into the slaving loop and additionally enables regulation of OM gain Semi integrator amplifier A7 enables oscillator slaving via switch C1 In AM mode dividers D2 D4 and D5 blocked as well as CPF1 and 01 Mode switch CM1 SN16 and SN17 switches the audio frequency signal to amplifier A6 1 2 SN19 which ensures regulation of AM gain Downstream from this amplifier a comparison circuit continuously compares the audio frequency signal with a reference voltage and the audio frequency signal output fr
24. ard connector yes Check 80 MHz output on Modulation board VI 6 LF Present dbi no T n0 LF amplitude 5 Vefe Out of yes synchronis no Fault in analo gical board INT ir Switch or Lf Fault analo ical board F detector ind control Fault in FM board range switching Fault in analogical board Fault in ana logical board gene LF INT 1kHz _ to 400 Hz Fault on analogical board Fault in 400 MHz generator rard n nma 4 emmener fes Kare 1 H i P i sat Poy f 1 ri i i UR t 1 W adr eb giec DIC Fault affectino modulation NO deviation yes no Poor calibration no Oscillo check JES on terminal 6 analogical board connector No deviation no no Oscillo check on terminal 19 analogical boardi connector yes lde at terminal 13 analogical board connector Poor deviation Check 80 MHz output on Modulation board Qut of synchronis 1 7 Fault analo yes gical board INI EXT switch or LE coax front P Fault in analo gical board LF detector ind control Fault in
25. cover damage caused by incorrect use of the instrument The client for his part undertakes not to interfere with the equipment during the warranty period failing which the warranty is rendered void One half of the cost of returning and re shipping the equipment for maintenance under warranty will be met by ADRET ELECTRONIQUE After expiry of the warranty period the Company will of course remain at the service of its customers and will offer its help to them for any maintenance work that may be necessary For any further information please contact your nearest ADRET representative The addresses of our main agents are given in the table below R seau commercial ADRET ADRET commercial network FRANCE Soci t BASCOUL ELECTRONIQUE 31200 TOULOUSE 35 rue du luchet T l 61 48 99 29 T lex 521 508 33600 BORDEAUX PESSAC 76 Avenue Pasteur T l 56 45 01 90 T lex 541 720 Soci t DIMEL Immeuble Le Marino 83000 TOULON Avenue Claude Farr re T l 94 41 49 63 T lex 430 093 JCF ELECTRONIQUE 74019 ANNECY CEDEX Annecy le Vieux BP 964 T l 50 23 63 64 T lex 385 417 Soci t SOREDIA Les Guittais Chatillon sur Seiche 35015 RENNES CEDEX BP 1413 T l 99 50 50 29 T lex 950 359 AFRIQUE DU SUD SOUTH AFRICA K B A INSTRUMENTATION PTY P O BOX 41062 Avenue Sandton 2199 CRAIGHALL TRANSVAAL 2024 11 788 1700 05 422 033 ALLEMAGNE GERMANY 5
26. d amplified by amplifiers A2 and 4 each amplifier supplies gain of approximately 9 to 10 dB The output level of the 400 MHz signal is between 9 and 12 dBm into 50 ohms The AM loop which is offset from the 400 MHz output includes an gain amplifier 1 R with linearity regulation detector and linearizing circuit featuring adjustment P2 used reduce the distorsion rate for high AM modulation rates signal of approximately 0 9 V DC is available on the output of L1 in the absence of AM modulation 0274990000 1 400 MHz GENERATION BOARD adret electronique SYNOPTIQUE _ 00 2 Af 4 XP AS AY to VHF module 480 MHz 400 MHz 80 MHz to Modulations board 0274990000 2 fe i eager rri 1 Flowchart Absence or lack of level at 400 MHz output Presence of 400MHz signal See 001 002 S and 004 no LO input yos See SN2 yes of SN2 correct and FL1 no no 580 MHz input correct See Q5 Q6 and ilter 626 627 110 and 28 1 See 480 MHz See 480 MHz generation generation module module 0274990000 3 4 adret electronique MODULE MODULE This module generates the output frequency of the 730 by heterodyning and
27. d is input directly to CI either in a capacitive link or in a direct link according to the mode selec ted Next the signal 13 processed the same as for internal audio operation with the following exception frequency _ instead of being switched ground 12 the M Pp from DT1 is sent to amplifier A3 which epee the excess LED s located on the P A 0274810000 2 bessere evene am i ecce ANALOG BOARD SYNOPTIQUE imt 3e to LED front panel Analogical U 4 8 16 32 32 64 c Attenuation cells control A 3 1 d H At rage F F daan der INT EXT Lae o 0 Lian 9 pe L H a H 5 i K z 3 E E B i 5 E Z A 5 H E E 5 2 H 3 4 2 4 H z 1 amp 29 amp c e T i o G AN torre t lt p EE 01 LF output Continuous vol Qu 2f to fM and tage LF from E Modulations Modulations 20 kHz from Internal output boards board Modulations board or ext LF input e9 9 e 4 mE BUS Mens NI TI v H m 1 1 p H
28. egulation of frequency deviation takes place on the modulation audio frequency input by variation in the gain of amplifier A1 which may be E adjusted by P1 10 V DC maximum This amplified audio frequency signal is then applied to the linearizing circuit and shifting amplifier A4 The role of amplifier A4 is to center the modulation audio frequency signal a around 6 V DC adjusted by P4 on the current block in order to use the 41 most linear portion of the varicap slope The output of amplifier A4 applies the audio frequency signal to the varicap by means of series RL network which drives it under low impedance in c order to limit audio frequency signal noise while remaining at high impedance under 8 MHz S The 8 MHz quartz oscillator which is thermostatically controlled in order to limit temperature drift is multiplied by two diode doubler and applied to a class C amplifier in the coliector a circuit in the collector tuned on harmonic 5 enables 80 MHz selection E This 80 MHz signal is sent across a PIN diode switch after filtering which selects either it the signal output by the Modulations board or polari zation of the diodes by means of 5 4 When the 80 MHz signal from the Modulations board is selected the 8 MHz oscillator is cut off by non conduction of Q5 The level of the 80 MHz signal is regulated by adjusting P5 on the class C amplifier L vana onere ereed
29. escribed in this paragraph A command from the CPU board is transfered by a bus to a DAC Log 2 Digits SN4 which features on its output a DC voltage proportional to the input coding this DC voltage also has a superimposed audio frequency signal in the case of AM modulation Analog variation extends over a dynamic of 14 dB for an output signal of between 19 9 dBm and 6 1 dBm Following the analog dynamic is not greater than 4 dB and ranges from 6 1 dB to 10 dB with the remainder effected by the output damper 5 0274810000 1 ANALOG BOARD The two internal audio frequency signals are generated as follows Signi are generated as follows 20 kHz audio frequency signal with TTL level output by the Modulations board is divided either by 20 or 50 by D1 to result in an output frequency of 1 kHz or 400 Hz This frequency is then filtered by active filter During internal operation the audio E signal thus generated is output via Al over the BNC connector means of switch C1 and is sent to amplifier A2 which switches it through detector D1 and over the audio frequency DAC Upon output from the DAC the level of the audio frequency signal is a function of programming of the rate or of the deviation in the various modulation modes In external audio frequency operation divider D1 and filter FL1 are blocked audio frequency signal is injected on the BNC an
30. ier A4 This latter SE features totally symmetrical design in order to obtain the best possible distorsion rate Principal level at output may reach 19 9 dBm into a matched 50 ohms load An auxiliary output makes available the frequency on the equipment rear x panel with variable level up to 0 dBm into high impedance load 7 Finally detector D1 maintains output level as constant as possible in function of the frequency by means of 5 and Output signal amplitude varies in a dynamic of 14 dB under the output 19 9 dBm in function of the instructed value provided by the level reference This variation occurs in A6 variation by PIN diodes on the input level of the 400 MHz frequency i 0275200000 2 VHF MODULE nique adret elecer jndjno METTI L ananas 1 ks id 5 LS 9 HW eau Lo Be ZHW 004 JK 21908170 QE HN 085 004 3ODLLdONAS i n Joje t9so uaeoJdde HN 085 00 993 ZHW 2 3032111980 ZHW 526 965 bid 1804 ySpaip UNH WOJ ZHW 9 4 1 A d RIA 0275200090 3 VHF MODULE False frequency at output yes frequency on 400 5
31. in function of output frequency coding and are mixed in M1 with the frequency from the 396 to 1 574 MHz oscillator in order to always result in output multiple of 2 MHz for this latter which may range up to 10 times 2 MHz d The frequency thus generated is then compared in a second sampler M2 to 2 MHz pulse obtained by dividing the 80 MHz reference signal by 40 A DC voltage is generated on the output of this sampler this voltage is propor tional to the phase difference between these two frequencies enabling finely tuned phase locking of the 396 to 574 MHz oscillator If a new code change ud occurs this voltage is temporarily blocked for 2 ms and phase locking voltage output by the phase lock oscillator board prepositions the oscillator via R65 At the end of this period this voltage is blocked and the fine phase loop is switched in The frequency is delivered to the outside of the board by two _ separator stages Q15 and 016 in order to drive the phase lock oscillator E board and the VHF Module and to the outside via Q14 to drive modulator M1 2 J 0274780000 1 2 MHz STEPS BOARD adret electronique 80 To phase locking SYNOPTIQUE 055 396 574 MHz Register Inhibition U phase locking osc 396 574 MHz 0274780000 2 EA Laina P r T TT L i
32. modes Presence of Jes TECUM See oscillator d a and modulator 2 no d Presence 5 t P109 and SNB AF signal on pin SN8 and 004 al E 3 of SNS RS E no ri CE Ji Presence AF signal on di ne of e ah See SN16 NN 6 of 5818 SE of connector control bit no Presence 185 See 5818 and See analogical signal pin 12 5816 board connector control bit no See analogical board 0274800000 8 adret eheckeera ANALOG BOARD ANALOG BOARD The analog board performs three independent functions control of the output damper control of analog damping generation of two internal audio frequency signals and control of modu lation rates The output damper is controlled as described in this paragraph command from the CPU board is transfered by a bus to register SN3 which delivers a logic state of I on its output when the relays corresponding to the desired damping level are to be excited This 1 logic state blocks the first PNP transistor resulting in saturation of the second PNP transistor and applies approximately 14 V to the coil of the corresponding relay Control 16 obtained in such way that damping is freed when the relay is excited in order to always have maximum damping if no control is present Analog damping is controlled as d
33. om a detector located on the 400 MHz 80 MHz board The result of this comparison modulates the transmitter current of modulator M2 by means of semi integrator amplifier A9 There is an 80 MHz f requency which is amplitude modulated to the rythm of the audio frequency signal available on the output of M2 0274800000 1 rv MODUL ATIONS adret lectronique control circuit SN24 and SN21 which receives this data by a bus from the CPU ensures all of the various board functions and inhibitions in combi nation with the control logic from SN22 and SN23 Finally in CW mode modulation functions are blocked The 80 MHz master oscillator signal transits only by amplifier A1 and modulator M2 The modulation current from this latter is fixed at a mean value of that existing to have 100 AM In addition input of the 10 MHz reference signal is blocked in F1 which cancels out the 20 kHz frequency necessary to the internal audio frequency signal This frequency is thus blocked in external 1 audio frequency operation L i L 0274800000 2 2 adret eiectroniqgue _ adret electronique To continuous FM generation pene Pb 7 400 MHz 80 MHz SYNOPTIQUE T 4 3 AM regulation of control FM M 80 MHz FM M 45 V tn generation board
34. output Signal at 108 no Oscillation no Voltage on 01 gt 2 V no Voltage identical on PIOS Counter division ratio correct presence of 200 kHz reference no See Ten Thousands board 0274760000 3 yes yes yes no no yes 200 STEPS BOARD Flowchart 1 See 01 02 and output circuit See 101 110 EI C4 01 and 02 See oscillator See follower amplifier SN6 See divider and coding See CPF SN and current mirror 200 STEPS BOARD Flowchart 2 no Division ratio correct yes ee SN anc current mirror no adr et electronique false or unstable frequency 100 and 600 signals Correct 79 6 119 4 oscillator signal correct at 02 See divider and coding See follower amplifier SN6 See 02 13 and See filter and shaper 0274760009 4 See Ten Thousands board Voltage on 101 correct Mixer output beat Shaper operation See CPF 545 and amplifier 5842 adret electronique PHASE LOCK OSCILLATOR PHASE LOCK OSCILLATOR i Phase lock oscillator board performs the following 1 approach of the 396 574 MHz oscillator and a
35. pproach of the final 400 to 500 MHz oscillator as well as requency tracking of both oscillators frequency comparison device is activated with each frequency change made on the front panel keyboard and prepositions the 396 574 MHz and 400 to 580 MHz oscillators on their new value This device operates only in a transient manner approximately 2 ms q The frequency output by the 396 574 MHz oscillator is divided by 64 in SN18 by 198 to 297 in the programmed divider controlled by SN15 The frequency is 31 25 kHz at output and is compared in comparator 5 5 the reference frequency obtained after division by 320 in dividers SN8 and SN4 The comparator operates constantly but coincidence circuit SN7 triggers monostable SN3 with each new counter data bit for approximately 2 ms B this monostable closes switch SN1 This switch validates the approach of the 7 396 574 MHz oscillator and the 400 580 MHz oscillator M In order to result in correct tracking between the two oscillators an amplifier with adjustable shift SN19 is inserted into the output to the EL 400 580 MHz approach adjustments are made at 1 and 179 MHz 1 0274770000 1 PHASE LOCK OSCILLATOR 2203271119250 ZHW 926 964 518 6155 892 861 y qoeoudde 1036111250 ZHW 085 004 e ENS 4013191441 DutAPTS 10938111250 ZHW 126
36. s VI 1 adret electronique Fault on switching on yes no LED indicator lit no Check mains cord the mains present 15 the fuse sound Replace fuse Power supply block failed 5 Only the lt STANDBY indi M cator lit yes No CLOCK indicator lit master oscillator nO CPU BUSY indicator 11 See CPU board front panel board or CPU Front panel connection VI 2 Ky cernere 1 1 i komme I kya unamasa r ER maaan iel adret 2 Fault affecting RF frequency Set 396 574 MHz oscillator ap proach using jum4 per included on Slaving board yes false frequency Frequency too high 22 Frequency unstable output frequency Two Hundreds board yes hundredths of kHz no 80MHz output failure oscillator 480 MHz module or modulation board 80 MHz switch Ec Er e EUG Frequency still nstable no Check 100 MHz presence 400 MHz presence no 80 MHz presence on 400 MHz board input yes no Set 396 574 MHz approach using includin laving b no requency still unstable no Frequency exact no VI 3 Failure on Ten Failure on
37. z oscillator drives two separators Q3 sends the signal to 1 the 400 600 kHz output across a divider by 200 4 x 10 x 5 Q4 is used as an ECL TTL adapter Additionally Q3 transmits the signal to the 20 000 to 29 999 programmed divider Phase lock oscillator on the CPF SNO07 is brought about by comparison between the output of this divider and a 4 kHz reference frequency This latter is obtained from the input 10 MHz signal after division by 2500 10 x 5 x 50 009 is TTL MOS 15 V adapter Weser i 1 i EE The programmed divider first uses ECL SP 8647 circuit which divides by 10 11 followed by divider by 2 or 3 SN10 then three dividers by 10 in series SN13 SN16 SNI18 Division ratio coding is sent to the 741 585 comparators SN12 SN15 and SN17 by means of registers SN19 and 5514 i CORRE These receive signals from the data bus and are addressed by SN21 to which r i Sro SNP erd is connected the address bus validation of this decoder is ensured by bit E 1 Pod OMS 0274750000 1 a H 1 Pirs n 10 000 STEPS BOARD ue TE c ull P ey 6 30119 ZHW OL ZH3009 01 001 Dutpooep ssaippy 519 5 LNS d U 9248510432 Spaupuny s sua OLNS 0285 0274750000 2 t 1 Kare hr norz red makiwas E J 1
Download Pdf Manuals
Related Search