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Marconi Signal Gener..

1. 115 120V 0 5A TT 230 240V 0 25A TT 3 E 3 El 210 220V 0 25A TT 105 110V 0 5A TT Fig 2 1 Voltage ranges showing switch and locking plate positions SAFETY TESTING Where safety tests on the AC supply input circuit are required the following procedures can be applied These comply with BS 4743 and IEC Publication 348 Tests are to be carried out as follows and in the order given under ambient conditions to ensure that AC supply input circuit components and wiring including earthing are safe 46882 001W Jan 92 INSTALLATION 1 Earth lead continuity test from any part of the metal frame to the bared end of the flexible lead for the earth pin of the user s AC supply plug Preferably a heavy current about 25 A should be applied for not more than 5 seconds Test limit not greater than 0 5 Q 2 500 V DC insulation test from the AC supply circuit to earth Test limit not less than 2 MQ GPIB INTERFACE The GPIB interface is fitted to the instrument when Option 001 is ordered and is also available as an optional accessory which can easily be fitted as follows 1 Remove the rectangular cover plate from the right hand side of the rear panel withdraw the interconnecting lead and discard the cover plate but retain the fixing screws 2 Connect the GPIB interface assembly ADO taking care that the ribbon cable connector SKP is correctly aligned with the connector PLP 3 Slide the GPIB assembly into the
2. for example in signal to noise ratio measurements press the MOD ON OFF key The off condition is indicated by the setting of an OFF annunciator in the MODULATION display Entering a new value of deviation will automatically restore the modulation 46882 001W Jan 90 3 7 OPERATION INCREMENTS Assigning increment values To display the current set of increment values press the A delta key Unless the values have been changed as below the following default set will be displayed Carrier frequency 1 kHz Modulation FM 1 kHz or M 0 1 rad or AM 1 RF level 1dB To return to the normal display without affecting the current increment values press any function key twice CII To change the increment value of any function press the A key followed by the function key then enter the new value and the terminator For example to select a carrier frequency increment of 10 kHz follow the sequence shown above FM M AM or RF LEVEL may be similarly incremented but note that for RF LEVEL increments the only valid terminator is the dB key Applying increments Each press of the t UP key increments the function parameter by the selected value likewise pressing the DOWN key decrements by a similar amount Holding the UP or DOWN key pressed results in continuous incrementing or decrementing after a delay of one second To change from the incrementing mode to the decrementing mode without the one second delay keep the UP key con
3. Risques g n raux Tension dangereuse Danger produits toxiques DS gt Conditions g n rales d utilisation Ce produit a t congu et test pour tre conforme aux exigences des normes CEI EN61010 1 R gles de s curit pour appareils lectriques de mesurage de r gulation et de laboratoire pour des quipements Classe I portables et pour une utilisation dans un environnement de pollution de niveau 2 Cet quipement est con u pour fonctionner partir d une alimentation de cat gorie II Cet quipement doit tre prot g de l introduction de liquides ainsi que des pr cipitations d eau de neige etc Lorsqu on transporte cet quipement d un environnement chaud vers un environnement froid il est important de laisser l quipement se stabiliser en temp rature avant de le connecter une alimentation afin d viter toute formation de condensation L appareil doit tre utilis uniquement dans le cadre des conditions d environnement sp cifi es au chapitre 1 Performance data du manuel d utilisation toute autre utilisation peut endommager les syst mes de protection Ce produit n est pas garanti pour fonctionner dans des atmosph res dangereuses ou pour un usage m dical Si l quipement doit tre utilis pour des applications en relation avec la s curit par exemple des applications militaires ou a ronautiques la compatibilit du produit doit tre tablie et approuv e par une personne c
4. The instrument can request service assert SRQ on certain error conditions under the control of an SRQ mask which is set using second function 4 SH1 Source handshake complete capability The source handshake sequences the transmission of each data byte from the instrument over the bus data lines The sequence is initiated when the function becomes active and the purpose of the function is to synchronize the rate at which bytes become available to the rate at which accepting devices on the bus can receive the data AH1 Acceptor handshake complete capability The acceptor handshake sequences the reading of the data byte from the bus data lines T6 Talker function no talk only function The talker function provides the 2022D with the ability to send device dependent messages over the bus to the controller The ability of any device to talk exists only when it has been addressed as a talker L4 Listener function no listen only function The listener function provides a device with the ability to receive device dependent messages over the bus The capability only exists where the device is addressed to listen via the bus by the controller SR1 Service request function complete capability The service request function gives the 2022D the capability to inform the controller when it requires attention RL1 Remote local function complete capability The remote local function allows the 2022D to be controlled either by t
5. 10 followed by numeral s 1 5 or 10 as appropriate and the STORE key Note This function merely records but does not change the frequency accepted Second function 11 Read identity string aJ LIJ LJ This facility is the same as second function 5 and provides identical display features but is first degree protected Unlock the instrument to the first level of operation by means of the unlocking procedure see second function 0 Then select 2nd FUNCT followed by numerals 11 The purpose of second function 11 is to provide compatibility with Signal Generator 2018A where an identical second function 11 facility allows commonality with GPIB controller instructions As described in second function 5 if QU is sent via the GPIB the following string is placed in the output buffer e g 2022D 001 654321 123 to confirm the instrument type software issue and serial number Second function 12 Write user definable string This is a GPIB only facility which enables you to store a string of up to 32 ASCII characters in a non volatile memory The second function number is displayed in the RF LEVEL display Up to 31 ASCII characters can be accepted and then terminated by lt if gt Follow this with ST command to store e g SF12 This is a user defined string lt cr gt lt lf gt ST would store This is a user defined string If an attempt is made to store too many characters then lt lf gt is automatically insert
6. WARNING Module d affichage cristaux liquides Ne pas d monter le module d affichage cristaux liquides La mati re contenue dans l afficheur cristaux liquides utilis dans cet appareil est une substance toxique Si l afficheur est endommag ou si la mati re des cristaux liquides s coule il faut viter de la mettre en contact avec sa bouche En cas de contact avec la peau laver imm diatement la surface touch e avec de l eau et du savon et s adresser un service m dical L clairage de l afficheur provient d un tube cathodique fluorescent CCFT Celui ci contient une petite quantit de gaz mercure qui est une substance toxique L afficheur ainsi que le tube CCFT sont en verre Il faut donc viter de leur faire subir des chocs m caniques pouvant causer des d g ts Ne pas se d barrasser de ces modules ni d aucun de leurs composants dans une poubelle usage domestique Utilisez uniquement les containers d chets appropri s A WARNING Position inclin e Lorsque l appareil est dans une position inclin e il est recommand pour des raisons de stabilit de ne pas y empiler d autres appareils N WARNING Risque li au feu Lors du remplacement des fusibles v rifiez l exactitude de leur type et de leur valeur Si le c ble d alimentation comporte une prise avec fusible int gr assurez vous que sa valeur est compatible avec les besoins en courant de l appareil Pour
7. alimentaci n 46882 001W Nov 98 xiii Chapter 1 GENERAL INFORMATION FEATURES The 2022D is a light weight synthesized signal generator having a frequency range of 10 kHz to 1 GHz and providing comprehensive amplitude frequency and phase modulation facilities with an RF output level range of 127 dBm to 13 dBm It is designed to cove a wide range of RF applications in development production and maintenance Output frequency is phase locked to an internal or external frequency standard and frequencies up to 100 MHz can be set to a resolution of 10 Hz and above that to a resolution of 100 Hz Fig 1 1 10 kHz to 1 GHz Signal Generator 2022D Front panel operation is carried out by direct entry of required settings via the keyboard Microprocessor control ensures flexibility simplicity of use and allows programming by the General Purpose Interface Bus GPIB This facility is offered as an option enabling the instrument to be used both as a manually operated bench mounted instrument or as part of a fully automated test system Output Calibrated output levels from 127 dBm to 13 dBm are provided A choice of ten output level unit combinations can be obtained on the front panel The RF output level can be set to a resolution of 0 1 dB over the entire output voltage range Protection against the accidental application of up to 50 W of reserve power is provided by a fast responding relay trip Full protection is also provided when the
8. been selected and stored it will remain valid for all subsequent power on sequences RF level accuracy of the instrument may there fore be impaired and care should be taken to account for this 46882 001W Jan 90 3 17 OPERATION Second function 16 Recall STORE 10 at switch on This facility allows the instrument to be operated in a remote or unattended location with a pre selected set of conditions which will remain unchanged in the event of in advertent switching off and on of the input supply voltage If this were to happen in the normal operating mode the instrument would resume the initial operating mode that is CARRIER FREQ 1000 MHz INT MOD no MODULATION and minimum RF LEVEL 127 dBm or equivalent These conditions can be superseded by storing the required operating conditions in STORE 10 and carrying out an automatic recall of the STORE 10 settings using the second function 16 mode 1 First select the required CARRIER FREQ MODULATION and RF LEVEL settings at the keyboard 2 Press the STORE key followed by the numerals 10 3 Complete the first level unlocking procedure see second function 0 Then select 2nd FUNCT and numerals 1 and 6 Follow this by selecting the recall store 10 mode numeral 1 Finally press the STORE key to terminate the entry If the supply voltage is interrupted and then restored the instrument will auto matically carry out a RECALL 10 instruction and reset to the STORE 10 conditions pr
9. can also be used for 10 Hz square wave switching with a peak deviation value limited to the lower of 999 kHz or 0 6 times the value obtained by the formula above Less than 2 total harmonic distortion at 1 kHz modulation frequency and maximum deviation for any carrier above 250 kHz Less than 0 5 total harmonic distortion at 1 kHz modulation frequency for deviations up to 25 kHz for any carrier frequency above 250 KHz with ALC off With modulation ALC on the deviation is cali brated for input levels between 0 9 V and 1 1 V RMS A HI or LO message is indicated in the modulation display if the applied level is outside the range of the ALC With modulation ALC off the deviation is calibrated for an input level of 1 V PD Input impedance is 100 kQ nominal 3 digit LCD with units annunciators Peak deviation from 0 to 9 99 radians 0 01 radian By front panel keyboard Internal 400 Hz 1 kHz or 3 kHz modulation or external input may be selected 5 of deviation 0 02 radian at 1 kHz modu lating frequency excluding residual phase modulation 1 dB from 10 Hz to 10 kHz relative to 1 kHz using external modulation input and ALC off 1 dB from 50 Hz to 10 kHz relative to 1 kHz using external modulation input and ALC on Less than 5 total harmonic distortion at 1 kHz modulating frequency and maximum deviation for any carrier frequency above 250 kHz 1 5 External modulation Indication Amplitude modulation Ra
10. capitolo 1 Performance data del manuale operativo in caso contrario le protezioni previste nello strumento potrebbero risultare non sufficienti Questo prodotto non stato approvato per essere usato in ambienti pericolosi o applicazioni medicali Se lo strumento deve essere usato per applicazioni particolari collegate alla sicurezza per esempio applicazioni militari o avioniche occorre che una persona o un istituto competente ne certifichi l uso WARNING Pericoli da elettricit alimentazione c a Quest apparato provvisto del collegamento di protezione di terra e rispetta le norme di sicurezza IEC classe 1 Per mantenere questa protezione necessario che il cavo la spina e la presa d alimentazione siano tutti provvisti di terra Il circuito d alimentazione contiene dei filtri i cui condensatori possono restare carichi anche dopo aver rimosso l alimentazione Sebbene l energia immagazzinata entro i limiti di sicurezza purtuttavia una leggera scossa pu essere avvertita toccando i capi della spina subito dopo averla rimossa Non rimuovere i coperchi utilizzare solo parti di scorta originali Vedi elenco internazionale dei Centri di Assistenza in fondo al manuale Fusibili Notare che entrambi i capi del cavo d alimentazione sono provvisti di fusibili In caso di rottura di uno solo dei due fusibili alcune parti dello strumento potrebbero restare sotto tensione 46882 001W x Nov 98 WARNING Perico
11. contact Pack the instrument in accordance with the general instruc tions below or with the more detailed information in the packing instruction note 1 Place supply lead in a suitable plastic bag and tape it to the instrument s rear panel between the rear feet 2 Spread the inner wrap round padded fitting flat and place the instrument into this with the carrying handle folded underneath and the four feet positioned into the four holes provided 3 Wrap the instrument with the packing all around and seal the two ends to gether with adhesive tape 4 Position the two end cushion protecting pieces at either end of the outer pack ing carton then slide the instrument within its inner wrap round protection into the outer packing carton Close and seal the outer carton 5 Wrap the container in waterproof paper and secure with adhesive tape Mark the package FRAGILE to encourage careful handling Note If the original container or materials are not available use a strong double wall carton packed with a 7 to 10 cm layer of shock absorbing material around all sides of the instrument to hold it firmly Protect the front panel controls with a plywood or cardboard load spreader with holes drilled to avoid the projecting RF output mod in out sockets and the supply on off switch if the rear panel has guard plates or other projections a rear load spreader is also advisable CONNECTING TO SUPPLY Excessive temperatures may a
12. instrument is switched off GPIB IFR General Purpose Interface Bus in accordance with IEEE Standard 488 1978 and IEC Publication 625 1 46882 001W 4 1 Oct 98 GENERAL INFORMATION An RF level offset capability allows the output level to be varied relative to the indicated value to compensate for external cable losses or to ensure that all instruments in a particular area give identical results Modulation Amplitude frequency and phase modulation can be provided by internal or external sources AM depth can be set in 0 5 steps up to 99 5 FM deviation up to 999 kHz and phase modulation up to 9 99 radians An auxiliary modulation input allows dual modulation to be applied for receiver testing An internal modulation oscillator provides switch selected frequencies of 400 Hz 1 kHz and 3 kHz Front panel All data and units selected are visible on a single liquid crystal display Data is entered on a keyboard that has been designed to be simple and logical to use Carrier frequency modulation and RF level functions may be incremented or decremented using the UP and DOWN keys Non volatile store and recall facilities are also provided using an electrically alterable read only memory that does not require a battery back up system A front panel cover for protecting the instrument in transit is available as an accessory Second function mode of operation This enables a number of auxiliary functions such as setting the G
13. manual WARNINGS contienen informaci n referente a prevenci n de da os personales CAUATIONS contienen informaci n referente a prevenci n de da os en equipos Notes contienen informaci n general importante S mbolos Los significados de los s mbolos de peligro que aparecen en los equipos son los siguientes S mbolo Naturaleza del peligro AN Peligro general AN Voltaje peligroso A Aviso de toxicidad Condiciones generales de uso Este producto ha sido dise ado y probado para cumplir los requerimientos de la normativa IEC EN61010 1 Requerimientos de la normativa para equipos el ctricos de medida control y uso en laboratorio para equipos clase I port tiles y para uso en un ambiente con un grado de contaminaci n 2 El equipo ha sido dise ado para funcionar sobre una instalaci n de alimentaci n de categor as II Debe protegerse el equipo de la entrada de l quidos y precipitaciones como nieve lluvia etc Cuando se traslada el equipo de entorno fr o a un entorno caliente es importante aguardar la estabilizaci n el equipo para evitar la condensaci n S lo debe utilizarse el aparato en las condiciones ambientales especificadas en el cap tulo 1 Especificaciones o Performance data del Manual de Instrucciones Manual de Operaci n Funcionamiento en caso contrario la propia protecci n del equipo puede resultar da ada Este producto no ha sido aprobado para su utilizaci n en entornos peligrosos o en aplica
14. of the instrument e g toggling controls such as on off special codes are provided to simplify programming In order to improve the readability of control strings the codes may be separated by commas or spaces after each code pair or data group These are ignored by the instrument When data is entered the syntax is the same over the GPIB as that used in control from the front panel For example to enter a complex string of instructions such as a carrier frequency of 123 45 MHz with an increment of 25 kHz and an RF level of 1 2 uV the string can be sent as follows CF 123 45 MZ DE CF 25 KZ LV 1 2 UV Similarly if it is required to change the RF level units setting to dBm second function 14 level unit code 4 the following string should be sent SF 14 4 ST Selection of a second function via the GPIB will result in a display of the SF number being shown in the instrument s RF LEVEL display The MOD ON OFF CARR ON OFF and INT EXT controls operate on the function currently active for data entry This may be specified e g FM M1 AM XM or implied e g FM 1 5 KZ IM but it is recommended that the function is specified within the string to ensure that the string will always have the same result Talking function On receipt of the QU command the current function setting e g CF FM is transferred to the GPIB output buffer in a format corresponding to the GPIB commands needed to set the instrument t
15. the unlocking procedure see second function 0 Then select 2nd FUNCT followed by numerals 1 and 5 There are three carrier frequency bands lt 250 MHz 250 500 MHz and 500 1000 MHz which are identified in the modulation display as 1 2 or 3 respectively One offset value may be set for each frequency band Selection of offsets on is made with the numeral 1 key or off with the 0 key Indication of the selected state is shown with either 1 or 0 in the CARRIER FREQUENCY display Either terminate the selection by pressing the STORE key or before doing so set a value of offset in the following manner Ensure offset on 1 is selected and then press the t UP key or the DOWN key to increment or decrement the RF level by 0 1 dB Each successive operation of the key will increment decrement the RF by a further 0 1 dB When sufficient offset has been determined press the STORE key to terminate the selection which will together with the offsets on selection remain valid until further adjustment is made Note If error 18 appears while setting offsets this indicates that the offset store has been protected by second function 196 If an offset value of 0 1 dB is selected when the instrument is set to the limit of its operating range i e 13 dBm or equivalent a maximum RF level of 12 9 dBm will be displayed a further 0 1 dB offset increment will decrease this to 12 8 dBm Note When an offset value has
16. 05 has been masked using second function 4 the service request action will not be initiated Clear switch on and return to local SDC and DCL clear 2022D to the following state Maximum carrier frequency 1000 MHz No AM FM or M Minimum RF level 127 dBm or equivalent Internal modulation at 1 kHz modulation frequency Increment settings Carrier frequency 1kHz Modulation 1 kHz FM 0 1 rad M or 1 AM RF level 1 dB To revert from GPIB to front panel control press the RET N key 46882 001W Jan 90 3 25 OPERATION If a local lock out command has been given the RET N key operation will be ignored Notes 1 INT EXT frequency standard selection the GPIB address and instrument stores are unaffected by the SDC and DCL commands 2 Switching on clears the 2022D to the same state as SDC or DCL unless Recall STORE 10 at switch on conditions apply 46882 001W 3 26 Jan 90 Chapter 4 BRIEF TECHNICAL DESCRIPTION Frequency synthesizer and signal processing 2022D is a synthesized AM FM or phase modulated signal generator covering a frequency range of 10 kHz to 1 GHz Frequencies in the range 250 to 500 MHz are generated from two voltage controlled oscillators In the range 62 5 to 250 MHz signal frequencies are obtained by divider circuits and in the range 10 kHz to 62 5 MHz by a beat frequency oscillator system A frequency doubler is used to cover the band 500 to 1000 MHz The output frequency is phas
17. A 5 MHz or 1 MHZ signal can be accepted by changing an internal link Connection is via a rear panel BNC socket A front panel BNC socket provides an output from the modulation oscillator when internal modulation is selected and becomes the external modulation input when external modulation is selected 1 V 10 EMF from a nominal 600 source Input level nominally 1 V RMS into 100 kQ see under Modulation for details A blanked hole is provided so that the RF output socket can be fitted to the rear panel 1 7 GENERAL IFORMATION Auxiliary modulation input GPIB interface Capabilities Conditions of storage and transport Temperature Humidity Altitude Rated range of use over which the full specification is met Temperature Safety Electro magnetic compatibility Power requirements AC supply 1 8 A rear panel BNC socket provides an auxiliary modulation input with a nominal sensitivity of 20 of the set modulation for a 1 V RMS input Input impedance 600 Q nominal A GPIB interface is available as an optional accessory and can be easily fitted by the user All functions except the SUPPLY ON switch are remotely programmable Complies with the following subsets as defined in IEEE 488 1978 and IEC Publication 625 1 SH1 AH1 T6 TEO L4 LEO SR1 RL1 PPO DCI DTO CO El 40 C to 70 C Up to 90 relative humidity at 40 C Up to 2500 m pressurised freight at 27 kPa differe
18. Fire hazard Make sure that only fuses of the correct rating and type are used for replacement If an integrally fused plug is used on the supply lead ensure that the fuse rating is commensurate with the current requirements of this equipment See under Performance data in Chapter 1 for power requirements 46882 001W iv Nov 98 CAUTION LCD handling When using this equipment take care not to depress the front or rear faces of the display module as this may damage the liquid crystal display elements CAUTION Static sensitive components This equipment contains static sensitive components which may be damaged by handling refer to this Service Manual for handling precautions CAUTION Suitability for use This equipment has been designed and manufactured by IFR Ltd to generate modulated analogue RF signals IFR Ltd has no control over the use of this equipment and cannot be held responsible for events arising from its use other than for its intended purpose 46882 001W Nov 98 v PRECAUTIONS WARNINGS CAUTIONS et NOTES Les termes suivants ont dans ce manuel des significations particuli res WARNINGS contient des informations pour viter toute blessure au personnel CAUTIONS contient des informations pour viter les dommages aux quipements Notes contient d importantes informations d ordre g n ral Symboles La signification des symboles li s cet quipement est la suivante Symbole Nature du risque
19. GPIB connector The contact assignment of the GPIB cable connector and the device connector is as shown in Fig 2 3 DIO 1 BEE ESSI DIO 5 DIO 2 2 14 DIO 6 DIO 3 3 15 DIO 7 DIO 4 4 16 DIO 8 EOI s 17 REN DAV 6 18 FORMS TWISTED PAIR WITH 6 NRFD I 7 19 FORMS TWISTED PAIR WITH 7 NDAC 8 20 FORMS TWISTED PAIR WITH 8 IFC 9 at FORMS TWISTED PAIR WITH 9 sRa 10 22 FORMS TWISTED PAIR WITH 10 ATN 11 23 FORMS TWISTED PAIR WITH 11 EARTH LOGIC EARTH SHIELD Fig 2 3 GPIB connector contact assignments 46882 001W 2 4 Jan 92 INSTALLATION RACK MOUNTING The instrument may be mounted in a standard 19 inch rack as a single unit using the kit 46883 717K This contains a pair of side angle plates wide enough to allow the instrument to sit centrally within the rack frame as shown in Fig 2 4 zu Fig 2 4 Single unit rack mounting If rear connection is required in a rack mounted system the RF OUTPUT socket can be removed and repositioned on the rear panel see the Service Manual for details 46882 001W July 91 2 5 2 6 INSTALLATION 46882 001W Mar 93 Chapter 3 OPERATION PRINCIPLES OF CONTROL All operating functions of the generator are carried out from the front panel keyboard which is divided into five distinct colour coded areas Remote operation from a GPIB controller is possible if the optional GPIB interface is fitted FRONT PANEL 40kHz 1GHz s
20. Operating Manual 10 kHz 1 GHz AM FM SIGNAL GENERATOR 2022D Includes information on Option 001 GPIB interface IFR Ltd 1998 No part of this book may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying or recorded by any information storage or retrieval system without permission in writing by IFR Ltd Printed in the UK Manual part no 46882 001W Issue 12 23 November 1998 CONTENTS Precautions Operating precautions Chapter1 GENERAL INFORMATION AND DATA Chapter2 INSTALLATION Chapter3 OPERATION Carrier frequency RF level Modulation Second functions GPIB functions Chapter4 BRIEF TECHNICAL DESCRIPTION Index List of tables List of figures Page iii iv 1 1 2 1 3 1 3 4 3 5 3 6 3 10 3 19 Index 1 Index 2 Index 3 46882 001W Nov 98 PRECAUTIONS WARNINGS CAUTIONS and NOTES These terms have specific meanings in this manual WARNINGS contain information to prevent personal injury CAUTIONS contain information to prevent damage to the equipment Notes contain important general information Symbols The meaning of hazard symbols appearing on the equipment is as follows Symbol Description General hazard Dangerous voltage Toxic hazard gt PEE Static sensitive components General conditions of use This product is designed and tested to comply with the requirements of IEC EN61010 1 Safety requirements for elect
21. PIB address selection of alternative RF level calibration units access to various calibration routines and an aid to diagnostic fault finding via the internal instrument bus PERFORMANCE DATA Carrier frequency Range 10 kHz to 1 GHz Displayed resolution 10 Hz up to 100 MHz 100 Hz above 100 MHz Selection By keyboard entry Accuracy Equal to the frequency standard accuracy see under Frequency standard Indication 7 digit LCD with units annunciation RF output Level 127 to 13 dBm 0 2 pV to 2 V EMF When AM is selected the maximum output power reduces linearly with AM depth to 7 dBm at maximum AM depth 46882 001W 1 2 Jan 92 Selection Output impedance VSWR Reverse power protection Output level flatness Output level accuracy Displayed resolution Indication Spurious signals Harmonically related signals for output levels up to 7 dBm Sub harmonics for output levels below 0 dBm Non harmonically related signals for output levels up to 7 dBm and at offsets from the carrier of 3 kHz or greater 46882 001W Jan 92 GENERAL INFORMATION By keyboard entry Units may be uV mV EMF or PD dB relative to 1 pV 1 mV 1 V EMF or PD dBm Conversion between dB and voltage units may be achieved by pressing the appropriate units key dB or V mV pV 50 Q Type N female socket to MIL 39012 3D Better than 1 5 1 for outptut levels below 7 dBm An electronic trip prot
22. Rear panel layout Reverse power protection RF level setting S Safety precautions Safety testing Second functions GPIB address setting Manual latch setting Read elapsed time Read identity string Read user definable string Recall STORE 10 at switch on Record ext freq std choice RF level offsets di RF level units setting Second level operation SRQ mask si Status Test display Unlock n Write user definable string Store and recall et Switching on U Unpacking and repacking 75 Q load operation LIST OF TABLES TABLE 3 1 GPIB modulation string 3 2 GPIB frequency string 3 3 GPIB RF level string LIST OF FIGURES t AUNAN 10 kHz to 1 GHz Signal Generator 2022D Case dimensions Voltage ranges showing switch positions GPIB interconnections GPIB connector contact assignments Single unit rack mounting Index 2 Iii Hd hd pd pod ed id ed ed jad nd ed Y NO En Y 0 001 00 A U D D ttiottt4 UD O id hd Pa bed Toe hero oe eee oe PA ee T dd 3 6 3 22 3 22 3 22 46882 001W July 91 P Front panel controls 3 1 Rear panel layout Dan nee ee ee 3 2 Switch on displays Si a hi sl dai 3 3 3 1 3 1 4 1 Status mode display SRO mask display i Block schematic diagram To gee eae Rana 46882 001W Jan 91 Am 1 Index 3
23. Schermo a cristalli liquidi LCD Liquid Crystal Display Non disassemblare il modulo LCD La sostanza contenuta nello schermo LCD tossica Se il modulo LCD viene danneggiato e si ha una perdita di liquido occorre evitarne il contatto con la bocca In caso di contatto con la pelle lavare immediatamente le aree interessate con acqua e sapone e contattare un medico L illuminazione dello schermo prodotta tramite un tubo fluorescente a catodo freddo CCFT Cold Cathode Fluorescent Tube che contiene una piccola quantit di gas mercurio anch esso tossico Sia lo schermo LCD sia il tubo CCFT sono di vetro per cui non devono essere sottoposti a shock meccanici che possono causarne la rottura Il modulo LCD il tubo CCFT o i loro residui vanno eliminati come residui speciali secondo la normativa vigente A WARNING Posizionamento inclinato Quando lo strumento in posizione inclinata raccomandato per motivi di stabilit non sovrapporre altri strumenti WARNING Pericolo d incendio Assicurarsi che in caso di sostituzione vengano utilizzati solo fusibili della portata e del tipo prescritti Se viene usata una spina con fusibili assicurarsi che questi siano di portata adeguata ai requisiti di alimentazione richiesti dallo strumento Tali requisiti sono riportati nel cap 1 Performance data 46882 001W Nov 98 xi PRECAUCIONES WARNINGS CAUTIONS y NOTES Estos t rminos tienen significados especificos en este
24. TERNAL MODULATION OUTSIDE ALC RANGE HIGH EXT STD SELECTED BUT NOT APPLIED 11 46882 001W 3 24 Jan 90 OPERATION No Error condition Action taken EXT STD FREQ NOT LOCKING LATCH WRITE ERROR EAROM WRITE ERROR EAROM RECALL ERROR GPIB BUS ERROR UNRECOGNIZED GPIB MNEMONIC CHARACTER Ignore both characters e g ATTEMPT TO WRITE TO PROTECTED if the string P CF M0 was STORE received the P C would result in error 17 being displayed and the rest of the string would be inter preted as FM 0 SRQ mask The SRQ response to the errors listed above can be suppressed by setting a 3 page 6 bit mask via second function 4 The bits of the mask refer directly to the errors i e the left most bit set indicates no response to error 1 the second from left no response to error 2 etc The mask is displayed by selection of second function 4 and may be changed by entering 1 s and 0 s via the keyboard The STORE key is pressed to finalize a change The SRQ mask is not stored in the non volatile memory when power is removed When the instrument is initially switched on the mask is set to all 0 s Reverse power protection When tripped by an overload applied to the RF OUTPUT socket the GPIB SRQ line is asserted and the status byte obtainable by the controller conducting a serial poll will contain the value 69 decimal The RPP can be reset via the bus by sending the RS command Note If error
25. V PWR annunciator will flash on the RF LEVEL display During this time the keyboard will not respond except to reset commands After the source of power has been disconnected reset the RPP by pressing the RF LEVEL function key Attempting to reset the RPP with power still applied will result in the RPP tripping again When the instrument is switched OFF the output socket is automatically dis connected from the output attenuator a further safety feature 46882 001W Jan 90 3 5 OPERATION Operation with 75 loads The performance specification for the instrument assumes operation into 50 Q loads but often it is desirable to work into mismatched loads This is in general possible although an uncertainty of performance may be introduced In the particular case of a 75 Q load this can be accurately matched for carrier frequencies up to 500 MHz by using the 50 75 Q Impedance Adapter Part No 54411 051X offered as an optional accessory This 25 Q series load maintains the correct open circuit voltage calibration and allows the reverse power protection circuit to function correctly MODULATION Internal modulation source In the internal modulation mode pressing the MOD ALC INT MOD FREQ key causes the internal modulation oscillator to sequence through its available frequencies 400 Hz 1 kHz and 3 kHz Press the key repeatedly until the required modulation frequency is obtained 3 kHz MOD I Nee 400Hz In th
26. V input before a HI or LO message in the modulation display indicates that the applied modulation signal level is outside the range of the ALC Control Front panel operation is carried out by direct entry of required settings via the keyboard Microprocessor control ensures flexibility simplicity of use and allows programming by the General Purpose Interface Bus GPIB This facility is offered as an optional accessory enabling the instrument to be used both as a manually operated bench mounted instrument or as part of a fully automated test system 46882 001W 4 2 Jan 90 A AC supply connection Accessories Amplitude modulation Auxiliary modulation e Carrier frequency setting Carrier on off A Connecting to supply D Display blanking F Features Frequency standard int ext Frequency modulation Front panel controls Functional description Fuses RE G General purpose interface bus GPIB Address setting Connector pin assignments Error numbers n Interface fitting Listening function Programming codes Return to local command Service requests Strings Talking function l Increments M Modulation ALC Modulation int ext O Operating precautions P Performance data Phase modulation Preparation for use Principles of control 46882 001W Jan 91 Am 1 INDEX Operating Manual H 52022 003X Vol 1 3 19 3 20 2 4 3 24 2 3 3 21 3 20 3 25 3 24 3 23 3 21 3 8 R Rack mounting
27. age is indicated in the modulation display if the level is outside the range of the ALC With modulation ALC off the modulation depth is calibrated for an input level of 1 V PD Input impedance is nominally 100 kQ DC coupled 3 digit LCD with units annunciators 46882 001W Mar 93 Modulation oscillator Frequency Selection Frequency accuracy Distortion Indication Frequency standard Internal frequency standard Frequency Temperature stability Aging rate Warm up time External frequency standard External standard input Auxiliary inputs and outputs Modulation input output Internal modulation oscillator output External modulation input Alternative RF output socket 46882 001W Mar 93 GENERAL INFORMATION 400 Hz 1 kHz and 3 KHz By repetitive pressing of the INT MOD FREQ key 5 Less than 1 total harmonic distortion One of three LEDs lights to indicate which frequency is selected Internal or external frequency standard may be selected from the front panel Annunciators show which is selected High stability oven controlled oscillator 10 MHz Better than 0 05 ppm over the temperature range 0 to 40 C Better than 0 3 ppm per year after one month s continuous use at constant ambient temperature Within 0 5 ppm of final frequency 5 minutes from switch on at ambient 20 C Accepts a 10 MHz signal of at least 1 V RMS into a 100 Q nominal impedance
28. al NO DEBE eliminarse mediante incineraci n WARNING M dulo de visualizador de cristal liquido No desmonte el m dulo del Visualizador La sustancia que forma el Cristal Liquido del panel de visualizaci n es t xica En caso de da arse el visualizador y salir a exterior dicha sustancia no permita que la misma entre en contacto con su boca Si la sustancia se pusiera en contacto con su piel lave inmediatamente las reas afectadas con agua y jab n y busque asistencia m dica La iluminaci n del visualizador se efect a mediante un Tubo Fluorescente de C todo Fr o CCFT Este tubo contiene una peque a cantidad de gas de mercurio que es una sustancia t xica Tanto el visualizador como el tubo fluorescente est n hechos de vidrio Por tanto no les someta a golpes que puedan romperlos No tire estos m dulos ni parte de ellos a la basura dom stica Desh gase de ellos con m todos aprobados para residuos industriales AN WARNING Tener en cuenta con el equipo inclinado Si utiliza el equipo en posici n inclinada se recomienda por razones de estabilidad no apilar otros equipos encima de l N WARNING Peligro de incendio Aseg rese de utilizar s lo fusibles del tipo y valores especificados como repuesto Si se utiliza una clavija con fusible incorporado aseg rese de que los valores del fusible corresponden a los requeridos por el equipo Ver secci n de especificaciones del cap tulo 1 para comprobar los requisitos de
29. ciones m dicas Si se va a utilizar el equipo en una aplicaci n con implicaciones en cuanto a seguridad como por ejemplo aplicaciones de avi nica o militares es preciso que un experto competente en materia de seguridad apruebe su uso A WARNING Nivel peligroso de electricidad tensi n de red Este equipo cumple las normas IEC Seguridad Clase 1 lo que significa que va provisto de un cable de protecci n de masa Para mantener esta protecci n el cable de alimentaci n de red debe de conectarse siempre a una clavija con terminal de masa Tenga en cuenta que el filtro de red contiene condensadores que pueden almacenar carga una vez desconectado el equipo Aunque la energ a almacenada est dentro de los requisitos de seguridad pudiera sentirse una ligera descarga al tocar la clavija de alimentaci n inmediatamente despu s de su desconexi n de red No quitar las tapas en el interior no existen piezas reemplazables por el usuario Vea la lista de Centros de Servicios Internacionales en la parte trasera del manual Fusibles Se hace notar que el Equipo est dotado de fusibles tanto en el activo como el neutro de alimentaci n Si s lo uno de estos fusibles fundiera existen partes del equipo que pudieran permanecer a tensi n de red WARNING Aviso de toxicidad Alguno de los componentes utilizados en este equipo pudieran incluir resinas u otro tipo de materiales que al arder produjeran sustancias t xicas Por tanto tome las debidas
30. cy of 2 dB A precision attenuator provides 120 dB in 10 dB steps and is a self contained module Three 30 dB one 20 dB and one 10 dB pad are used each operated by TOS relays 16 dB of fine level control is provided by PIN diode attenuators Modulation Amplitude frequency and phase modulation can be provided internally from a switchable modulation source at a frequency of 400 Hz 1 KHz or 3 KHz Amplitude modulation For carrier frequencies greater than 62 5 MHz modu lation depths up to 80 are obtained using PIN diode attenuators and envelope feedback At carrier frequencies less than 62 5 MHz a fixed frequency modulator operating at a frequency of 160 MHz allows up to 95 depth of modulation AM is DC coupled Frequency modulation FM is created by applying the modulation signal to varactor s in the 250 to 500 MHz oscillator Simultaneous modulation of the reference frequency prevents fall off in response below the loop bandwidth FM off CW mode gives the lowest residual FM noise The low frequency response is tailored to optimize the modulation accuracy of low frequency square waves Phase modulation This is obtained using a differentiator in the modulation signal path and then applying the treated signal in the same manner as for FM Modulation signal ALC This is always in circuit when internal modulation is in use and may be selected when switched to external modulation The circuit uses a JFET and allows up to 10 error in a 1
31. e de ce type de composant WARNING Le B ryllia Le B ryllia oxyde de B ryllium entre dans la composition de certains composants de cet appareil Cette mati re peut lorsqu elle est inhal e sous forme de vapeur ou de fine poussi re tre la cause de maladies respiratoires Sous sa forme solide comme c est le cas ici cette mati re peut tre manipul e sans risque bien qu il soit conseill d viter toute manipulation pouvant entra ner la formation de poussi re par abrasion de la surface Il est donc conseill pour viter ce risque de prendre les pr cautions requises pour retirer ces composants et s en d barrasser Ne les jetez pas avec les d chets industriels ou domestiques ou ne les envoyez pas par la poste Il faut les emballer s par ment et solidement et bien indiquer la nature du risque avant de les c der avec pr cautions une entreprise sp cialis e dans le traitement de d chets toxiques WARNING Bronze au b ryllium Dans cet quipement certaines pi ces m caniques sont base de bronze au b ryllium Il s agit d un alliage dans lequel le pourcentage de b ryllium ne d passe pas 5 Il ne pr sente aucun danger en utilisation normale Toutefois cet alliage ne doit pas tre travaill soud ou soumis un processus qui implique l utilisation d une source de chaleur En cas de destruction il sera entrepos dans un container sp cial Il ne devra pas tre d truit par incin ration
32. e internal modulation frequency mode pressing the MOD ALC INT MOD FREQ key causes the internal modulation oscillator to sequence through its available frequencies 400 Hz 1 kHz and 3 kHz Press the key repeatedly until the required modulation frequency is obtained External modulation FM INT The instrument normally powers up in the internal mode To select external modulation press the INT EXT key after selecting the AM or FM M function This will set the EXT annunciator in the MODULATION display Press the INT EXT key again to return to internal modulation 1 m O a MOD 1 ALC If external modulation has been selected the modulating signal can be set internally to the correct level provided the applied voltage is between 0 9 V and 1 1 V by pressing the MOD ALC key If the input is outside the range of the ALC system either a HI or LO message will indicate this in the MODULATION display Selection is indicated by the adjacent LED The instrument will normally power up with MOD ALC off when in the A modulation mode The modulation ALC is always on in the internal modulation mode 7 se sn OPERATION Auxiliary modulation A rear panel BNC socket AUX MOD IN allows an external modulation signal to be applied at the same time as the normal internal or external modulation source A signal level of 1 V RMS at this socket will produce 20 of the indicated modulation setting For example if the 2022D is set to produce 5 kHz deviat
33. e locked to a frequency standard and frequencies up to 100 MHz can be set to a resolution of 10 Hz Above 100 MHz the resolution is 100 Hz A fractional division scheme allows this resolution to be obtained whilst still keeping the phase locked loop bandwidth reasonably high Provision is also made for the use of an external frequency standard when this is preferred Frequencies of 10 5 or 1 MHz can be used depending on the position of an internal link Note A full technical description appears in the Service Manual H 52022 930X Vol 2 part number 46881 847B 10 MHz INT STD or 1 5 10 MHz EXT STD EXT STD 10MHz PIN DIODE ATTENUATOR 10kHz 2 5 MHz son OUTPUT 10kHz 62 5 MHz POWER AMPLIFIER 160 01 222 5 MHz JITTER CORRECTION DIVIDERS a LOW PASS FILTERS PIN FRACTIONAL N si SYNTHESIZER 250 o 250 500 MHz oo 10Hz STEPS 500 MHz ATTENUATOR VCO o DOUBLER AMPUFIER 1 AM BAND PASS 500 1000 MHz FILTER FM LOW MOD FREQUENCIES ACI Fig 4 1 Block schematic diagram 46882 001W Jan 90 4 1 BRIEF TECHNICAL DESCRIPTION Output Calibrated output levels from 127 dBm to 13 dBm are provided A combination of ten output level calibration units can be selected on the front panel The RF output level can be set to a resolution of 0 1 dB over the entire output voltage range with a total cumulative accura
34. ects the generator output against reverse power of up to 50 W from a 50 Q source and 25 W with a source VSWR up to 5 1 for frequencies from DC to 1 GHz The trip may be reset from the front panel or via the GPIB For safety the protection is also provided when the instrument is switched off Better than 0 5 dB from 10 kHz to 1 GHz for RF levels above 7 dBm 1 dB for output levels above 10 dBm 2 dB for output levels below 10 dBm 0 1 dB or better over the entire voltage range 4 digit LCD with units annunciators Better than 35 dBc typically better than 40 dBc for carrier frequencies up to 62 5 MHz Better than 25 dBc typically better than 35 dBc for carrier frequencies above 62 5 MHz None for carrier frequencies up to 500 MHz better than 20 dBc for carrier frequencies above 500 MHz For carrier frequencies above 62 5 MHz better than 70 dBc For carrier frequencies below 62 5 MHz better than 55 dBc in the band up to 150 MHz and better than 40 dBc in the band above 150 MHz 1 3 Single sideband phase noise Residual FM with FM off RF leakage Frequency modulation Range Displayed resolution Selection Deviation accuracy Frequency response GENERAL INFORMATION Typically less than 120 dBc Hz at 470 MHz Typically less than 130 dBc Hz at 150 MHz Less than 7 Hz RMS deviation in a 300 Hz to 3 kHz bandwidth from 250 to 499 MHz and improving by approximately 6 dB per octa
35. ed as the 32nd 46882 001W Jan 90 3 15 OPERATION Second function 13 Read user definable string This facility provides a means of reading back data set by means of SF12 write facility and is again a bus only facility The second function number is displayed in the RF LEVEL display and in response to QU command places the user defined string into the GPIB output buffer Second function 14 RF level units setting Unlock the instrument to the first level of operation by means of the unlocking procedure see second function 0 Then select 2nd FUNCT followed by the numerals 1 and 4 On entering second function 14 a digit is displayed in the FREQUENCY window as shown above This is the code number for the current RF level units as shown in the table below To change the units press the new unit code number Then press STORE to terminate the entry Unit code Logarithmic unit Linear unit dBmV EMF dBuV EMF dBmV PD EMF dBuV PD dBm dBmV EME dBuV EMF dBmV PD PD dBuV PD dBm OOND AUNH O Second function 15 RF level offsets In addition to the standard calibration for RF output level the instrument has a capability for overall level adjustment to facilitate matching with other equipment The output level can be raised or lowered by approximately 2 dB in the offset mode First select a carrier frequency within the chosen band followed by a suitable RF level 46882 001W 3 16 Jan 90 OPERATION Complete
36. ence i Instrument type no ii Software issue no iii Initial operating mode PPP Fig 3 3 Switch on displays Note If second function 16 was in use before the instrument was switched off the contents of store 10 will be recalled as the initial operating mode instead of the default conditions shown in Fig 3 3 If store 10 contents are recalled when display blanking second function 197 is on none of the settings will be visible Use REC L 00 to obtain a visible display Check that the CARRIER FREQUENCY window does not indicate EXT STD unless an external frequency standard is being used If this has been in advertently selected error 11 will be displayed in which case press CARR FREQ and INT EXT keys to reselect internal frequency standard During normal operation the instrument s internal reference standard will give an accuracy within the rated performance after a warm up period of 5 minutes at normal ambient temperatures 46882 001W Jan 90 3 3 OPERATION OPERATING PROCEDURES The general procedure for selecting a numerical parameter such as frequency modulation or RF level is to enter the following sequence FUNCTION key which lights the adjacent LED NUMERICAL VALUE keys including decimal marker and negative sign if required UNITS key which acts as terminator If an error is made while keying clear the entry by re selecting the function key If value entered is o
37. energy is within the approved safety requirements a slight shock may be felt if the plug pins are touched immediately after removal Do not remove covers no user serviceable parts inside See list of IFR Ltd International Service Centres at rear of manual Fuses Note that there are supply fuses in both the live and neutral wires of the supply lead If only one of these fuses should rupture certain parts of the equipment could remain at supply potential 46882 001W Nov 98 ili WARNING Toxic hazards Some of the components used in this equipment may include resins and other materials which give off toxic fumes if incinerated Take appropriate precautions therefore in the disposal of these items WARNING Beryllia Beryllia beryllium oxide is used in the construction of some of the components in this equipment This material when in the form of fine dust or vapour and inhaled into the lungs can cause a respiratory disease In its solid form as used here it can be handled quite safely although it is prudent to avoid handling conditions which promote dust formation by surface abrasion Because of this hazard you are advised to be very careful in removing and disposing of these components Do not put them in the general industrial or domestic waste or despatch them by post They should be separately and securely packed and clearly identified to show the nature of the hazard and then disposed of in a safe manner by an authorized to
38. eviously set To disable the facility first unlock the instrument to first level operation select 2nd FUNCT 16 followed by the numeral 0 and finally the STORE key If second function 197 is in use all information normally shown on the front panel will be blanked Details of this facility are given in the Service Manual Second functions 190 199 Second level operation The following facilities all have second degree protection Further information on these and details of the special key code used to unlock to this level are contained in the Service Manual Second Facility Function 190 Identity string setting 191 FM tracking calibration 192 RF level calibration 193 Voltage tuned filter VTF calibration 194 AM calibration 195 Set checksum 196 Protection of store and offset settings 197 Display blanking of recalled stores 198 Read total instrument operating time 199 Reset elapsed time 46882 001W Jan 90 OPERATION GPIB FUNCTIONS The GPIB interface which is an optional accessory allows the instrument to be coupled to a controller The essential purpose of the GPIB function is described below Further information on the general features and applications of the GPIB system can be obtained from The GPIB Manual offered as an optional accessory The 2022D has both talker and listener capabilities One address is used for both talking and listening and is set via the front panel or via the GPIB using second function 2
39. f 1 V RMS produces a secondary modulation at 20 of the indicated primary modulation STD FREQ IN A BNC socket which allows an input from an external 10 MHz standard frequency or 1 MHz or 5 MHz after resetting an internal link VOLTAGE SELECTOR switches A combination of four positions which select ranges of 105 110 V 115 120 V 210 220 V or 230 240 V each with a 10 tolerance to afford a complete cover over the ranges 95 to 132 V and 190 to 264 V Selector switch plate Can be turned and or reversed to secure the VOLTAGE SELECTOR switches in one of four pre selected positions AC fuses Supply input fuses are rated at 0 25 A time lag for the 190 V to 264 V range or 0 5 A time lag for the 95 V to 132 V range AC supply input The AC supply is connected through this plug which mates with the connector fitted to the supply lead STD FREQ ADJ Allows the internal standard to be set against a primary external standard CAUTION Incorrect adjustment of this preset will impair the frequency accuracy of the generator and it should therefore only be adjusted by an authorized re calibration unit 8 RF OUT This blanked hole provides alternative connector locations when the instrument is rack mounted Fitting instructions are included in Chap 5 of the Service Manual 46882 001W Jan 90 OPERATION PREPARATION FOR USE 1 2 3 Switch SUPPLY ON and note that the following three display patterns appear in sequ
40. ffect the instrument s performance therefore com pletely remove the plastic cover if one is supplied over the case and avoid standing the instrument on or close to other equipment that is hot Before connecting the instrument to the AC supply check the position of the two voltage selector switches on the rear panel A locking plate fixes both switches into one of four possible combinations and reveals only the selected voltage range The instrument is normally despatched with the switches set to 230 240 V To select a different voltage range remove the locking plate and re position the switches to the required range as shown in Fig 2 1 and refit the locking plate 46882 001W July 91 2 1 INSTALLATION Note The AC supply fuse may also have to be changed An indication of the correct fuse rating is given with each displayed voltage range i e 0 5 A TT time lag for the 105 to 120 V ranges 0 25 A TT time lag for the 210 to 240 V ranges The fuses are 20 mm x 5 mm cartridge type The free AC supply cable is fitted at one end with a female plug which mates with the AC connector at the rear of the instrument When fitting a supply plug ensure that conductors are connected as follows Earth Green yellow Neutral Blue Live Brown When attaching the supply lead to a non soldered plug it is recommended that the tinned ends of the lead are first cut off to avoid the danger of cold flow resulting in intermittent connections
41. he local front panel keys or by device dependent messages over the bus DC1 Device clear function complete capability Device clear is a general reset and may be given to all devices in the system simultaneously DCL or only to addressed devices SDC 2022D resets to the default power up mode that is 46882 001W Jan 90 3 19 OPERATION Maximum carrier frequency 1000 MHz No AM FM or M Minimum RF level 127 dBm or equivalent Internal modulation at 1 kHz rate Increment settings Carrier frequency 1 kHz Modulation 1 kHz FM 0 1 rad M or 1 AM RF level 1 dB Note The instrument settings following Device Clear on Selective Device Clear are not affected by the settings of second functions 16 or 197 Before these conditions are set a checksum is calculated for the calibration data FM tracking and RF level and referred to a number held in the non volatile memory If this test of calibration validity fails the instrument responds by asserting SRQ The status byte will contain the error number 7 to signal a calibration data fault in addition to the SRQ asserted bit In order to continue with the device clear and normal operation thereafter the instrument must be restarted by sending any valid instruction code e g CF This serves only as a reset and will not be interpreted in the normal way E1 Open collector drivers The GPIB drivers fitted to 2022D have open collector rather than tristate outpu
42. ignal generator 2022D MODULATION cri VOI a ae DOO RF LEVEL RF OUTPUT 509 Fig 3 1 Front panel controls SUPPLY switch Applies the AC supply voltage 2 MOD IN OUT socket Provides a 600 Q nominal 1 V EMF output from the internal 1 kHz modulation oscillator or accepts a modulating input from an external source 3 Major function keys Six of the seven keys have an associated LED to indicate the function selected 4 Numerical keypad For entering numerical value for the function selected including minus sign and decimal point 5 Units keys The four keys assign units of measure and also terminate the numerical entry 6 Miscellaneous functions The right hand group of seven keys is for switching the carrier and modulation on or off incrementing decrementing and selecting internal or external modulation One further key on the left selects modulation ALC and the internal modulation frequency 2nd FUNCT blue This key with its associated LED accesses additional secondary control and calibration facilities RF OUTPUT 50 Q N type output socket with reverse power protection 46882 001W Oct 98 3 1 REAR PANEL OPERATION Fig 3 2 Rear panel layout REMOTE CONTROL GPIB INTERFACE This optional accessory allows remote control of the instrument Accepts a 24 way IEEE GPIB connector AUX MOD IN A BNC socket which accepts an auxiliary external modu lating signal An input o
43. instrument engaging top and bottom card guides and switch the instrument on temporarily Check that the front panel displays data correctly If this is satisfactory switch off and continue with step 4 if however display data is corrupted switch off and re check the alignment of SKP and PLP 4 Secure the GPIB assembly into the instrument engaging the top and bottom card guides and fasten the assembly to the rear panel using the two screws removed in step 1 5 The interface is ready for GPIB operation after setting the appropriate talker listener address see Chap 3 Second function 2 6 Connection to other equipment which has a 24 way bus connector to IEEE Standard 488 can be made with the GPIB lead assembly 43129 189U available as an optional accessory Where conformity with the radio frequency interference limits specified by VDE Verband Deutscher Electrotechniker is required an alternative double screened GPIB lead assembly 46883 962H is available An IEEE to IEC adapter 46883 408K is also available for interfacing with systems using a 25 way bus connector to IEC Recommendation 625 see Fig 2 2 46882 001W July 91 2 3 INSTALLATION EQUIPMENT WITH IEEE CONNECTOR INSTRUMENT ZA 2 IEEE LEAD ES 43129 189U IEEE CONNECTOR INSTRUMENT EQUIPMENT 258 25 IEC LEAD Ta a IEEE E CONNECTOR IEEE to IEC CONNECTOR ADAPTER 46883 408K Fig 2 2 GPIB interconnections
44. ion using the internal 1 kHz source and a 1 V RMS signal is applied to the AUX MOD IN socket the combined deviation will be 6 kHz The auxiliary modulation facility is particularly useful for tests on radio receivers when a low level sub audible signalling tone needs to be applied in addition to the normal modulation Amplitude modulation C Ee Press the AM function key unless its LED is already lit Enter the required value of modulation depth followed by the terminator If the requested value of AM exceeds that allowed by the current RF level setting then the level is reset to the maximum available for the AM depth selected and a warning is given in the form of a flashing colon symbol to the left of the RF LEVEL display Frequency or phase modulation 000 EDO Press the FM M function key unless its LED is already lit Enter the required value of deviation followed by a terminator MHz kHz or Hz for FM RAD for M When the first digit of a new setting is entered both FM and PM annunciators are set pressing the terminator key removes the unwanted annunciator To change from FM to PM or vice versa press the FM M key again re enter data and re select the required terminator key If the requested FM deviation exceeds that allowed by the current carrier frequency setting the deviation is set to the maximum available MOD ON OFF To turn FM or DM off whilst still retaining the current value of entered deviation
45. ional GPIB interface the following string is put into the output buffer 2022D 001 654321 123 Software issue number 001 although not displayed is inserted between type and serial number in the string Second function 6 Test display ep VE ABRBBBE SRQ EXT STD a 888 He 27 88 We FM o HZ REV Pwa er ExT M RAD v pd Select 2nd FUNCT followed by numeral 6 All display components are then set to give confirmation of the back plane drive and LED operation and also the CMOS logic and LCD segments on the CARRIER FREQUENCY MODULATION and RF LEVEL displays Second function 9 Read elapsed time This facility enables you to observe the total number of instrument running hours from the last reset It may be used to indicate for instance calibration intervals The elapsed time is as shown above and has a resolution of 0 5 h Display characters are not updated while being viewed The elapsed time can be reset to zero see Service Manual for details 46882 001W 3 14 Jan 90 OPERATION Second function 10 Record external frequency standard choice RE I This facility enables the choice of external frequency standard 1 5 or 10 MHz as set by the position of the internal link to be recorded and displayed in the status display mode second function 1 Unlock the instrument to the first level of operation by means of the unlocking procedure see second function 0 Then select 2nd FUNCT
46. is entered by pressing the blue 2nd FUNCT key followed by a number corresponding to the second function required Pressing the 2nd FUNCT key inhibits the action of some keys but the instrument can always be restored to its normal operating mode by pressing any of the function keys This means of exit from second function operation is always safe it will not corrupt any data or alter any status bits and the displays will revert to their normal functions STORE No data will be permanently altered unless the STORE key is pressed The operation of each of the secondary functions is as follows Second function 0 Unlock E00E Switching on the instrument automatically locks all second functions that have a first or second degree of protection Access to first level operation is obtained by the UNLOCK procedure 1 Press 2nd FUNCT and 0 keys and note that 0 is displayed in the RF LEVEL window 2 Then press the and MOD ALC keys simultaneously until I is displayed in the FREQUENCY window this will take approximately 5 seconds 46882 001W 3 10 Jan 90 OPERATION The instrument will then be unlocked to enable selection of the required second function within the first level group If the sequence is in error or aborted part way through the instrument will remain locked Once unlocked the instrument remains so until either the 2nd FUNCT and 0 keys are once more pressed or until the instrument po
47. la consommation reportez vous au Performance data dans le chapitre 1 46882 001W Nov 98 vii PRECAUZIONI WARNINGS CAUTIONS e NOTES Questi termini vengono utilizzati in questo manuale con significati specifici WARNINGS riportano informazioni atte ad evitare possibili pericoli alla persona CAUTIONS riportano informazioni per evitare possibili pericoli all apparec chiatura Notes riportano importanti informazioni di carattere generale Simboli Significato dei simboli di pericolo utilizzati nell apparato Simbolo Tipo di pericolo Pericolo generico Tensione pericolosa Pericolo sostanze tossiche gt gt gt Condizioni generali d uso Questo prodotto stato progettato e collaudato per rispondere ai requisiti della direttiva IEC EN61010 1 Safety requirements for electrical equipment for measurement control and laboratory use per apparati di classe I portatili e per l uso in un ambiente inquinato di grado 2 L apparato stato progettato per essere alimentato da un alimentatore di categoria II Lo strumento deve essere protetto dal possibile ingresso di liquidi quali ad es acqua pioggia neve ecc Qualora lo strumento venga portato da un ambiente freddo ad uno caldo importante lasciare che la temperatura all interno dello strumento si stabilizzi prima di alimentarlo per evitare formazione di condense Lo strumento deve essere utilizzato esclusivamente nelle condizioni ambientali descritte nel
48. lity is useful for recording such information as the date the next calibration is due test gear numbers etc The string is terminated by the LINEFEED character lt lf gt ASCII code 10 which is included as the last character stored If an attempt is made to store too many characters then lt lf gt is automatically inserted as the 32nd SF13 QU User string read facility This facility provides a means of reading back data set by means of SF12 write facility and is again a bus only facility Service requests SRQ The 2022D can request service to warn the controller of certain error conditions In response to a serial poll after asserting the SRQ line the 2022D will provide a status word 8 bits in which bit 6 is set to indicate an SRQ request and the first five bits 0 to 4 indicate an error number The error number is also displayed briefly in the carrier frequency window Errors 06 and 08 will result in the instrument not functioning Error 07 can be overridden with a restart command any function code or digit Error numbers No Error condition Action taken 00 NO ERROR 01 REQUEST OUTSIDE LIMITS 02 INCORRECT KEY CODE SEQUENCE 03 TOO MANY DIGITS 04 INCORRECT UNIT 05 RPP TRIP Wait for reset instruction RS 06 RAM CHECK FAILURE IC9 07 EAROM CHECKSUM FAILURE IC10 Wait for restart instruction any function code or digit 08 EPROM CHECKSUM FAILURE IC5 IC8 09 EXTERNAL MODULATION OUTSIDE ALC RANGE LOW 10 EX
49. lo sostanze tossiche Alcuni dei componenti usati in questo strumento possono contenere resine o altri materiali che se bruciati possono emettere fumi tossici Prendere quindi le opportune precauzioni nell uso di tali parti WARNING Berillio Berillio ossido di berillio utilizzato nella costruzione di alcuni componenti di quest apparato Questo materiale se inalato sotto forma di polvere fine o vapore pu causare malattie respiratorie Allo stato solido come usato qui pu essere maneggiato con sufficiente sicurezza anche se prudente evitare condizioni che provochino la formazione di polveri tramite abrasioni superficiali A cause di questi pericoli occorre essere molto prudenti nella rimozione e nella locazione di questi componenti Questi non devono essere gettati tra i rifiuti domestici o industriali n vanno spediti per posta Essi devono essere impacchettati separatamente ed in modo sicuro e devono indicare chiaramente la natura del pericolo e quindi affidate a personale autorizzato WARNING Rame berillio Alcuni componenti meccanici in questo strumento sono realizzati in rame berillio Si tratta di una lega con contenuto di berillio di circa il 5 che non presenta alcun rischio in usi normali Questo materiale non deve essere lavorato saldato o subire qualsiasi processo che coinvolge alte temperature Deve essere eliminato come rifiuto speciale Non deve essere eliminato tramite inceneritore WARNING
50. nge Resolution Selection Accuracy Frequency response Distortion External modulation accuracy Indication GENERAL INFORMATION With modulation ALC on the deviation is cali brated for input levels between 0 9 and 1 1 V RMS A HI or LO message is indicated in the modulation display if the applied level is outside the range of the ALC With modulation ALC off the deviation is calibrated for an input level of 1 V PD Input impedance is 100 kQ nominal 3 digit LCD with units annunciators 0 to 99 5 0 5 By front panel keyboard Internal 400 Hz 1 kHz or 3 kHz modulation or external input may be selected For peak output power levels up to 9 dBm Better than 4 of depth setting 1 for 1 kHz modulating frequency and depths up to 95 for carrier frequencies up to 62 5 MHz Better than 4 of depth setting 1 for 1 kHz modulating frequency and depths up to 80 for carrier frequencies up to 400 MHz 0 5 dB from 50 Hz to 15 kHz relative to 1 kHz at 80 depth using external modulation input ALC on and DC coupled with ALC off Less than 3 total harmonic distortion at 1 kHz modulating frequency for depths up to 80 for carrier frequencies up to 400 MHz Less than 5 total harmonic distortion at 1 kHz modulating frequency for depths up to 95 for carrier frequencies up to 62 5 MHz With modulation ALC on the modulation depth is calibrated for input levels between 0 9 and 1 1 V RMS A HI or LO mess
51. nnector adapter 46883 408K RF coaxial cable N to N type 54311 095C Coaxial adapter type N to BNC 54311 092P Impedance adapter 50 75 Q 25 Q series resistor BNC 54411 051X National Instruments Lab Window instrument drivers 59000 183S 46882 001W Jan 92 GENERAL INFORMATION EC Declaration of Conformity Certificate Ref No EEA00041 The undersigned representing Manufacturer IFR Ltd Address Longacres House Norton Green Road Stevenage Hertfordshire U K SG1 2BA Herewith declares that the product Equipment Description 10 kHz 1 GHz Signal Generator Model No 2022D Options is in conformity with the following EC directive s including all applicable amendments 73 23 EEC Low Voltage Directive 89 336 EEC EMC Directive and that the standards and or technical specifications referenced below have been applied IEC EN61010 1 EN55011 1991 Class B EN60555 2 1987 IFR Stevenage Place 12th November 1998 Date ko Roger Dixon Product Liability Manager Signature 46882 001W 1 11 Nov 98 Chapter 2 INSTALLATION UNPACKING AND REPACKING Retain the container packing material and the packing instruction note if included in case it is necessary to reship the instrument If the instrument is to be returned for servicing attach a label indicating the service required type or model number on rear label serial number and your return address including name of
52. ntial i e 3 9 1bf in2 0 to 55 C This instrument is designed to comply with the requirements of IEC EN61010 1 for Class I portable equipment and is for use in a pollution degree 2 environment The equipment is designed to operate from installation supply category II Conforms to the protection requirements of EEC Council Directive 89 336 EEC by complying with the following standards EN 55011 Class B CISPR 11 EN 50082 1 IEC 801 2 3 4 EN60555 2 TEC 555 2 Switchable voltage ranges all 10 105 to 110 V 115 to 120 V 210 to 220 V 230 to 240 V 45 to 400 Hz 70 VA max 46882 001W Nov 98 GENERAL INFORMATION Dimensions and Weight Height 152 mm 6 in Width 256 mm 10 in Depth 367 mm 14 5 in Excluding handle projection Weight 7 5 kg 16 5 Ib TPAS078 All Dimensions in mm Fig I 2 Case dimensions 46882 001W Jan 91 Am 1 1 9 GENERAL INFORMATION OPTIONS 001 GPIB interface fitted ACCESSORIES Supplied accessories Part no AC supply lead 43129 003W Operating Manual H 52022 003X Vol 1 46882 001W Optional accessories Part no Service Manual H 52022 003X Vol 2 46882 002D GPIB module 54433 003N Front panel protective cover 54124 023J Rack mounting kit single 46884 502Z The GPIB Manual H 54811 010P Contains details of general GPIB protocols 46881 365R GPIB lead assembly 43129 189U Screened GPIB lead assembly for enhanced RFI performance 46883 962H GPIB IEEF IEC co
53. o request service over the GPIB for particular conditions Error numbers are listed from 1 to 18 inclusive At switch on all error numbers are unmasked 0 Selection of second function 4 gives a six bit binary number in the frequency display To access all 18 error numbers three pages are required At switch on default mode page 1 is selected and the page number indicated in the modulation display Error numbers 1 6 are represented in the frequency display the lowest error on the left of the display To move to page 2 press the decimal point key the MODULATION display now indicates page 2 and error numbers 7 12 are represented from left to right Again press the decimal point to give access to page 3 representing error numbers 13 18 Pressing the decimal point a further time will return you to page 1 Ones and zeros are entered via the keyboard and rotate in from the right Enter a bit 1 to mask the desired error and when in position press the STORE key For more information on the significance of each digit see the paragraph Error numbers page 3 24 Fig 3 5 shows the mask set to ignore a GPIB bus error Error No 16 46882 001W Jan 90 3 13 OPERATION Second function 5 Read identity string Selection of this facility enables you to confirm the instrument type number then after pressing the decimal point its serial number e g 2022 Ser No 654321 123 If QU command is sent via the opt
54. o the current state RF level will be displayed in log or linear units but without a specific reference since this information cannot be re entered directly Increment settings are also available if QU is sent whilst in DELTA mode with a current function LED lit The following tables give the format for each type of string 46882 001W Jan 90 3 21 OPERATION TABLE 3 1 MODULATION STRING 18 characters Number of characters in field 3 digits or leading spaces plus decimal point or space Represents a space which is used when the field has no relevance such as the levelling field when internal modulation is selected e g DE FM 1 00 KZ M1 IM F3 TABLE 3 2 FREQUENCY STRING 17 characters Number of characters in field 7 digits or leading MZ IS spaces plus decimal KZ XS point or space 3 digits or leading spaces plus decimal point or space e g LV 100 0 MV C1 46882 001W 3 22 Jan 90 OPERATION The external modulation input level status indicated by the modulation window HI and LO is also accessed The current status if outside the specified limit is transferred to the GPIB output by means of an error message Error No 9 input too low Error No 10 input too high Requesting a string to be output will overwrite any string data waiting to be sent Addressing the instrument to talk without specifying a string to be sent or re addressing to talk after a string has been completed will result in an e
55. omp tente AN WARNING S curit lectrique tension d alimentation alternative Cet appareil est prot g conform ment la norme CEI de s curit Classe 1 c est dire que sa prise secteur comporte un fil de protection la terre Pour maintenir cette protection le c ble d alimentation doit toujours tre branch la source d alimentation par l interm diaire d une prise comportant une borne de terre Notez que les filtres d alimentation contiennent des condensateurs qui peuvent encore tre charg s lorsque l appareil est d branch Bien que l nergie contenue soit conforme aux exigences de s curit il est possible de ressentir un l ger choc si lon touche les bornes sit t apr s d branchement Ne pas enlever les capots aucune pi ce r parable ne se trouve l int rieur Contacter un des Centres de Maintenance Internationaux de IFR Ltd dans la liste jointe la fin du manuel Fusibles Notez qu il y a deux fusibles l un pour la phase et l autre pour le neutre du c ble d alimentation Si un seul fusible est coup certaines parties de l appareil peuvent rester au potentiel d alimentation 46882 001W yi Nov 98 WARNING Danger produits toxiques Certains composants utilis s dans cet appareil peuvent contenir des r sines et d autres mati res qui d gagent des fum es toxiques lors de leur incin ration Les pr cautions d usages doivent donc tre prises lorsqu on se d barrass
56. precauciones en la manipulaci n de esas piezas 46882 001W xii Nov 98 WARNING Berilio Berilio xido de berilio Este material es utilizado en la fabricaci n de alguno de los componentes de este equipo La inhalaci n de este material en forma de polvo fino o vapor entrando en los pulmones puede ser causa de enfermedades respiratorias En forma s lida como se utiliza en este caso puede manipularse con bastante seguridad aunque se recomienda no manejarlo en aquellas condiciones que pudieran favorecer la aparici n de polvo por abrasi n de la superficie Por todo lo anterior se recomienda tener el m ximo cuidado al reemplazar o deshacerse de estos componentes no tir ndolos en basuras industriales o dom sticas y no utilizar el correo para su env o Deben ser empaquetados de forma segura y separada y el paquete debidamente etiquetado e identificado se alando claramente la naturaleza del riesgo y ponerlo a disposici n de un destructor autorizado de productos t xicos WARNING Berilio cobre Algunos componentes mec nicos contenidos en este instrumento incorporan berilio cobre en su proceso de fabricaci n Se trata de una aleaci n con un contenido aproximado de berilio del 5 lo que no representa ning n riesgo durante su uso normal El material no debe ser manipulado soldado ni sometido a ning n proceso que implique la aplicaci n de calor Para su eliminaci n debe tratarse como un residuo especial El materi
57. rical equipment for measurement control and laboratory use for Class I portable equipment and is for use in a pollution degree 2 environment The equipment is designed to operate from an installation category II supply Equipment should be protected from the ingress of liquids and precipitation such as rain snow etc When moving the equipment from a cold to a hot environment it is important to allow the temperature of the equipment to stabilise before it is connected to the supply to avoid condensation forming The equipment must only be operated within the environmental conditions specified in Chapter 1 Performance data in the Operating Instruction manual otherwise the protection provided by the equipment may be impaired This product is not approved for use in hazardous atmospheres or medical applications If the equipment is to be used in a safety related application e g avionics or military applications the suitability of the product must be assessed and approved for use by a competent person WARNING Electrical hazards AC supply voltage This equipment conforms with IEC Safety Class I meaning that it is provided with a protective grounding lead To maintain this protection the supply lead must always be connected to the source of supply via a socket with a grounded contact Be aware that the supply filter contains capacitors that may remain charged after the equipment is disconnected from the supply Although the stored
58. rror and SRQ if not masked SF1 QU Status string When accessed by SF1 QU the status of the instrument is sent to the controller each data field being delimited by one space in the following format XX X X X X X X GPIB OFFSETS LEVEL STORES DISPLAY PROTECTION FREQ STD ADDRESS ON OFF UNITS OFFSETS BLANKING LEVEL 1 5 or CODE LOCKING 10 MHz GPIB address 00 to 30 Offsets 0 off 1 on Level units code 0 to 9 see second function 14 Stores offsets locking 0 stores and offsets unlocked 1 stores locked offsets unlocked 2 stores unlocked offsets locked 3 stores and offsets locked see second function 196 in Service Manual Display blanking 0 off of recalled stores 1 on see second function 197 in Service Manual Protection level 0 unprotected 1 first level 2 second level Ext frequency standard 1 5 or 10 MHZ see second function 10 46882 001W Jan 90 3 23 OPERATION SF11 QU Identity string read only The identity string accessed by SF11 QU allows instrument type number software issue number and serial number to be read by the controller The information is stored in non volatile memory The string is displayed as described in second function 11 Each data field is delimited by one space SF12 User string write facility Up to 32 ASCII characters can be stored in non volatile memory by the user This bus only faci
59. s error message may also be displayed when the instrument is initially switched on until such time as the internal frequency standard synchronizing circuits have locked to the external frequency standard input This will take approximately one minute Subsequent reselections made when the instrument is at or near to its operating temperature will not incur this delay and therefore the error message will not then be displayed RF LEVEL LJ LJ ES Press the RF LEVEL key and enter the required value including any decimal point or minus sign The terminator keys give a choice of 3 linear units volts millivolts and microvolts and a logarithmic unit decibels These units can be further qualified by second function 14 see page 3 15 which offers the choice of EMF or PD and allows the logarithmic units to be expressed in dBuV dBmV or dBm The units in use will be shown on the RF level display If the level requested is too high at the currently set AM depth then the RF level is set to the maximum available and a warning is given in the form of a flashing colon symbol to the left of the RF LEVEL display Note To convert an RF level indication from linear to log units or vice versa simply press the new units key For example to convert an indication in mV to dBm press the dB key Reverse power protection Accidental application of reverse power to the RF OUTPUT socket will trip the reverse power protection RPP unit and the RE
60. ted GPIB data output in response to QU command when the 2022D is addressed to talk gives the following string with indicating a space AA B C D E E GG Second function 2 GPIB address setting If the GPIB option is not fitted the sign is displayed in the CARRIER FREQUENCY display otherwise the current GPIB address is displayed If a new address is required this may be entered via the keyboard Numbers rotate in from the right When the required address is displayed pressing STORE key will if the address is acceptable 00 30 replace the previous one If the address is invalid it will be ignored and the current address re displayed The GPIB address is stored in the non volatile memory Second function 3 Manual latch setting This function allows a 6 or 8 bit binary instruction to be directed to any of the instrument s internal latches for testing and fault finding This facility is fully described in the Service Manual and is an invaluable aid when diagnosing internal instrument bus or latch faults On exiting from second function 3 all latch data which may have been over written is restored 46882 001W 3 12 Jan 90 OPERATION Second function 4 SRQ mask setting Error numbers 13 14 15 1617 18 III lIl 000 08 Page number Fig 3 5 SRQ mask setting display STORE Select 2nd FUNCT followed by numeral 4 The SRQ mask allows an instruction to be made for the 2022D not t
61. tings is in operation this will not succeed and error message 18 will be displayed as shown above A list of error numbers is given on page 3 24 Also if second function 197 display blanking is in operation only the numerals of the stored or recalled store will be displayed in the RF LEVEL window Further details of second functions 196 and 197 both of which are second degree protected are contained in the Service Manual De 46882 001W Jan 90 OPERATION SECOND FUNCTIONS Second function operations provide a means of controlling various secondary features and calibrations within the instrument Access to many of these operations is generally not required during routine use of the instrument and some should only be accessed by skilled personnel during the course of realignment fault finding or repair There are three levels of operation as follows Normal operation Second functions accessed by a single key entry 0 9 are unprotected First level operation Second functions accessed by a two key entry 10 18 have first degree protection Access to this level can be gained after operating an unlocking procedure see Second function 0 Second level operation Second functions accessed by a three key entry 190 199 have second degree protection and can only be accessed by the operation of a special key code Details of the code are given in the Service Manual O 2 1 FUNCT In general the second function mode
62. tinuously pressed allowing the instrument to increment then press the DOWN key also When the UP key is released the instrument will immediately decrement Similarly to change from down to up without delay press the UP key before releasing the DOWN key and when the DOWN key is released the instru ment will immediately increment TOTAL A To find the total shift from the original setting press the TOTAL A key While this key is pressed all the displays will show the total shift of each function from its starting value To return to the initial value of the selected function press the RET N key RET N 46882 001W 3 8 Jan 90 OPERATION STORE AND RECALL The instrument has 100 non volatile stores available Stores numbered 00 to 19 store complete instrument settings including increment values Stores 20 to 99 store settings of carrier frequency only To store press STORE followed by a two digit numeric entry Holding the last entered digit key pressed will keep the store number on the display The command will be executed only when the key is released De To recall press REC L followed by the appropriate two digit numeric entry Increment or decrement keys can then be used to sequence the recall of stores if required Pressing the RET N key will recall the first store selected before incrementing or decrementing took place E PI e BE If an attempt is made to store values when second function 196 protection of store set
63. ts Setting the GPIB address The instrument s talk listen address is selected by means of second function 2 Acceptable addresses 00 to 30 can be set by this means and the instrument s internal address register will be updated by reading the address at power on and on receipt of a device clear message The current GPIB address is shown in the frequency display window when the interface is correctly installed GPIB programming codes Functions Miscellaneous functions CF Carrier frequency ST Store followed by a FM Frequency modulation RC Recall number 00 99 AM Amplitude modulation IS Internal freq standard PM Phase modulation XS External freq standard LV RE level IM ternal modulation DE Delta Increment Decrement XM External modulation SF Second function see note on CO Carrier off page 3 11 C1 Carrier on RS Reset RPP UP Increment up QU Query send current function DN Increment down setting to GPIB buffer RT Return 46882 001W 3 20 Jan 90 OPERATION Megahertz VL Volts Mod ALC off Kilohertz MV Millivolts Mod ALC on Hertz UV Microvolt Mod off Percentage DB Decibel Mod on Radians 400 Hz osc 1 KHz osc 3 kHz osc Listening function The 2022D is remotely controlled over the GPIB by strings of two character codes and digits sent in upper case ASCII format Where possible these codes correspond directly to the front panel keys however where the normal front panel control requires a knowledge of the previous state
64. utside the rated range the instrument will set to the nearest end of range value CARRIER FREQUENCY Press the CARR FREQ key unless its LED is already lit Enter the required value via the numerical key pad and note that the data entered appears in the CARRIER FREQUENCY display Terminate the instruction by pressing the MHz kHz or Hz key Carrier on off CARR ON OFF The carrier may be switched off or on at any time by pressing the CARR ON OFF key Internal external frequency standard _ CARR INT FREQ EXT At switch on the instrument will set to either internal or external frequency standard depending on its last state before switch off External standard control is indicated by the annunciator EXT STD in the CARRIER FREQUENCY display Pressing the INT EXT key will toggle between internal and external standard When INT is selected the frequency is controlled by an internal high stability 10 MHz crystal controlled oscillator When EXT is selected an external 10 MHz signal of at least 1 V RMS is required at the rear panel STD FREQ IN socket The instrument will lock automatically to this signal Or 1 MHz or 5 MHz after resetting an internal link for details see Service Manual 46882 001W 3 4 Jan 90 OPERATION Error no 11 is displayed in the CARRIER FREQUENCY window if the input is of incorrect level or not connected Error no 12 is displayed if the input frequency is outside the locking range Thi
65. ve with reducing carrier frequency down to 62 5 MHz Better than 3 5 Hz RMS below 62 5 MHz Less than 0 5 pV PD generated in a 50 Q load by a two turn 25 mm loop 25 mm or more from the case of the generator with the output level set to less than 10 dBm and the output terminated in a 50 Q sealed load The maximum deviation available varies with carrier frequency range as shown in the table below Frequency Maximum range deviation 500 MHz 1 GHz 999 kHz 250 to 500 MHz 500 kHz 125 to 250 MHz 250 kHz 62 5 to 125 MHz 125 kHz Below 62 5 MHz 100 KHz 10 Hz for deviations up to 9 99 kHz 100 Hz for deviations from 10 kHz to 99 9 kHz 1 kHz for deviations from 100 kHz to 999 kHz By front panel keyboard Internal 400 Hz 1 kHz or 3 kHz modulation or external input may be selected 5 of deviation 20 Hz at 1 kHz modulating frequency excluding residual FM 0 5 dB from 50 Hz to 50 kHz relative to 1 kHz using external modulation input With ALC off the low frequency response is extended to 10 Hz with a peak deviation value limited to the lower of 999 kHz or 0 047 x Modulation Freq in Hz x Carrier Freq in MHz 160 if Carrier Freq is below 62 5 MHz kHz 46882 001W Mar 93 Distortion External modulation Indication Phase modulation Range Displayed resolution Selection Deviation accuracy Frequency response Distortion 46882 001W Mar 93 GENERAL INFORMATION With ALC off
66. wer is switched off Note Access to all second functions is always available over the GPIB where fitted Access to second functions via GPIB selection should be restricted to personnel who have a full knowledge of these operations and require access to them in the course of realignment fault finding or repair only If inadvertent selections are made it is possible to invalidate the instrument s calibration Second function 1 Status Entering 2nd FUNCT followed by the numeral 1 key will result in the instrument displaying status information as shown in Fig 3 4 LA BODELL dan prada gent pt pri di DIO amet land G Fig 3 4 Status mode display GPIB address 00 to 30 Offsets 0 off 1 on see second function 15 where A to Il C Level units code 0 to 9 see second function 14 D Stores offsets locking 0 stores and offsets unlocked 1 stores locked offsets unlocked 2 stores unlocked offsets locked 3 stores and offsets locked see second function 196 in Service Manual E Display blanking 0 off of recalled stores 1 on see second function 197 in Service Manual 46882 001W Jan 90 3 11 OPERATION F Protection level 0 unprotected 1 first level 2 second level G Ext frequency standard 1 5 or 10 MHz see second function 10 H Indication of second function number currently selec
67. xic waste contractor WARNING Beryllium copper Some mechanical components within this instrument are manufactured from beryllium copper This is an alloy with a beryllium content of approximately 5 It represents no risk in normal use The material should not be machined welded or subjected to any process where heat is involved It must be disposed of as special waste It must NOT be disposed of by incineration WARNING Liquid crystal display LCD module Do not dismantle the display module The Liquid Crystal substance within the display panel used in this equipment is a toxic substance If the display panel is damaged and any of the Liquid Crystal substance leaks out do not allow it to come into contact with your mouth If the substance comes into contact with your skin immediately wash the affected areas with soap and water and seek medical advice The display illumination is produced by a Cold Cathode Fluorescent Tube CCFT This contains a small amount of mercury gas which is a toxic substance Both the display panel and the CCFT are made of glass Therefore do not subject the module to mechanical shocks which might cause fractures Do not dispose of these modules or any part of them in domestic waste Use only approved waste disposal methods A WARNING Tilt facility When the equipment is in the tilt position it is advisable for stability reasons not to stack other equipment on top of it A WARNING

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