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Racal Instruments 3271 Operating Manual

Vxi signal generator 9 khz - 2.4 ghz
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Racal 3271
2.4 GHz VXI Signal Generator
A l l t r a d e m a r k s , b r a n d n a m e s , a n d b r a n d s a p p e a r i n g h e r e i n a r e t h e p r o p e r t y o f t h e i r r e s p e c t i v e o w n e r s .
• C r i t i c a l a n d e x p e d i t e d s e r v i c e s
• I n s t o c k / R e a d y - t o - s h i p
Artisan Scientific Corporation dba Artisan Technology Group is not an affiliate, representative, or authorized distributor for any manufacturer listed herein.
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https://www.artisantg.com/48657-1
• We b u y y o u r e x c e s s , u n d e r u t i l i z e d , a n d i d l e e q u i p me n t
• F u l l - s e r v i c e , i n d e p e n d e n t r e p a i r c e n t e r

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  • Page 1 Racal 3271 2.4 GHz VXI Signal Generator In Stock Used and in Excellent Condition Buy Today! https://www.artisantg.com/48657-1 A l l t r a d e m a r k s , b r a n d n a m e s , a n d b r a n d s a p p e a r i n g h e r e i n a r e t h e p r o p e r t y o f t h e i r r e s p e c t i v e o w n e r s .
  • Page 2 Contains Operating Manual VXI SIGNAL GENERATOR 3271 9 kHz - 2.4 GHz Part number A8130 Issue 9 Creation date May 2001 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 3 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 4 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 Racal Instruments Ltd. Printed in the UK Manual part no. A8130...
  • Page 5 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 6: About This Manual

    About this manual This manual explains how to use the 3271 AM/FM Signal Generator. Intended audience Persons engaged on work relating to equipment who have a need for accurately generated signals in the VHF and UHF spectrum. Structure Chapter 1 Main features and performance data.

  • Page 7: Table Of Contents

    CONTENTS PRECAUTIONS ..........................iv PRECAUTIONS ..........................vi VORSICHTSMASSNAHMEN....................viii PRECAUZIONI ..........................x PRECAUCIONES.........................xii CHAPTER 1 GENERAL INFORMATION ................1-1 CHAPTER 2 INSTALLATION AND POWER-UP..............2-1 CHAPTER 3 PROGRAMMING ....................3-1 Miscellaneous commands ...................3-29 Status byte......................3-33 Error messages ....................3-43 CHAPTER 4 TECHNICAL DESCRIPTION................4-1 CHAPTER 5 ACCEPTANCE TESTING ................5-1 Test procedures.....................5-5 INDEX ..........................

  • Page 8: Precautions

    Precautions These terms have specific meanings in this manual: WARNING information to prevent personal injury. information to prevent damage to the equipment. important general information. Symbols The meaning of hazard symbols appearing on the equipment is as follows:- Symbol Description General hazard Toxic hazard Static sensitive components...

  • Page 9: Installation

    WARNING Fire hazard Access to the supply fuses is through the removal of an external cover. Removal of the covers should be referred to qualified Personnel. For continued protection against fire, fuses must only be replaced with those of the correct rating and type. WARNING Toxic hazards Some of the components used in this equipment may include resins and other materials which give off...

  • Page 10: Symboles Signalant Un Risque

    Précautions Les termes suivants ont, dans ce manuel, des significations particulières: WARNING contient des informations pour éviter toute blessure au personnel. contient des informations pour éviter les dommages aux équipements. contient d'importantes informations d'ordre général. Symboles signalant un risque La signification des symboles liés à cet équipement est la suivante: Symbole Nature du risque Risques généraux...
  • Page 11 WARNING Risque lié au feu L'accès aux fusibles d'alimentation se fait après démontage d'un couvercle de protection extérieur. Cette manipulation est à la charge d'un personnel qualifié. Pour un protection continue contre le feu, les fusibles de remplacement doivent de type et de valeur adaptés. WARNING Danger produits toxiques Certains composants utilisés dans cet appareil peuvent contenir des résines et d’autres matières qui...

  • Page 12: Vorsichtsmassnahmen

    Vorsichtsmaßnahmen Diese Hinweise haben eine bestimmte Bedeutung in diesem Handbuch: WARNING dienen zur Vermeidung von Verletzungsrisiken. dienen dem Schutz der Geräte. enthalten wichtige Informationen. Gefahrensymbole Die Gefahrensymbole auf den Geräten sind wie folgt: Symbol Gefahrenart Allgemeine Gefahr Warnung vor giftigen Substanzen Allgemeine Hinweise zur Verwendung Dieses Produkt wurde entsprechend den Anforderungen von IEC/EN61010-1 “Sicherheitsanforderungen für elektrische Ausrüstung für Meßaufgaben, Steuerung und Laborbedarf”,...
  • Page 13 WARNING Brandgefahr Der Zugriff auf die Netzsicherungen geschieht durch die Entfernung einer Abdeckung. Die Entfernung der Abdeckungen sollte nur von qualifiziertem Personal ausgeführt werden. Zum Schutz gegen Brandgefahr dürfen die Sicherungen nur gegen solche gleichen Typs und Wertes ausgetauscht werden. WARNING Warnung vor giftigen Substanzen In einigen Bauelementen dieses Geräts können Epoxyharze oder andere Materialien enthalten sein, die...

  • Page 14: Precauzioni

    Precauzioni Questi termini vengono utilizzati in questo manuale con significati specifici: WARNING riportano informazioni atte ad evitare possibili pericoli alla persona. riportano informazioni per evitare possibili pericoli all’apparecchiatura. riportano importanti informazioni di carattere generale. Simboli di pericolo Significato dei simboli di pericolo utilizzati nell’apparato: Simbolo Tipo di pericolo Pericolo generico...

  • Page 15: Pericolo D'incendio

    WARNING Pericolo d’incendio L’accesso ai fusibili dell’alimentazione avviene attraverso la rimozione di un coperchio esterno. La rimozione dei coperchi dovrebbe essere eseguita solo da personale qualificato. Per una protezione costante contro pericoli d’incendio, utilizzare esclusivamente fusibili del tipo e dalle caratteristiche elettriche prescritte.

  • Page 16: Precauciones

    Precauciones Estos términos tienen significados específicos en este manual: WARNING contienen información referente a prevención de daños personales. contienen información referente a prevención de daños en equipos. contienen información general importante. Símbolos de peligro Los significados de los símbolos de peligro que aparecen en los equipos son los siguientes: Símbolo Naturaleza del peligro Peligro general...

  • Page 17: Peligro De Incendio

    WARNING Peligro de incendio El acceso a los fusibles de alimentación se lleva a cabo retirando la tapa exterior del equipo. La retirada de las tapas deberá efectuaría personal cualificado. Para asegurar protección continuada frente a incendios, los fusibles fundidos sólo deberán reemplazarse con aquellos del tipo y valores correctos. WARNING Aviso de toxicidad Alguno de los componentes utilizados en este equipo pudieran incluir resinas u otro tipo de materiales...

  • Page 18: Chapter 1 General Information

    Versions, options and accessories....................1-6 Introduction The 3271 is a C size, message-based VXI signal generator covering the frequency range 9 kHz to 2.4 GHz. The RF output can be modulated in amplitude, frequency or phase using internal or external signal sources. Additionally pulse modulation may be applied externally. An internal AF source is capable of generating simultaneous two-tone modulation.
  • Page 19 To prevent accidental change of the contents of the stored settings, individual memories or ranges of memories can be write-protected. Triggers Triggering the 3271 Signal Generator may be via the VXI TTL triggers (0 - 7), the trigger command, *TRG message or front panel input. Calibration data All alignment data is digitally derived.

  • Page 20: Performance Data

    Performance data GENERAL DESCRIPTION The 3271 is a synthesized VXI signal generator covering the frequency range 9 kHz to 2.4 GHz. The RF output can be amplitude, frequency, phase or pulse modulated. An internal programmable AF source is capable of generating simultaneous two tone modulation.
  • Page 21 GENERAL INFORMATION MODULATION FM, AM or phase modulation can be applied to the carrier from an internal or external modulation source. The internal modulation source is capable of generating two simultaneous signals into any one of the modulation channels. Internal and external modulation can be simultaneously enabled to produce combined amplitude and frequency (or phase) modulation.
  • Page 22 PULSE MODULATION Carrier frequency range 32 MHz to 2.4 GHz, usable to 10 MHz. RF level range Maximum guaranteed output is reduced to +20 dBm up to 1.2 GHz or +14 dBm above 1.2 GHz when pulse modulation is selected. RF level accuracy Maximum additional uncertainty is ±0.5 dB.

  • Page 23: Versions, Options And Accessories

    3271 9 kHz to 2.4 GHz Signal Generator. Supplied accessories A8130 Operating manual (this manual). 60-0042 3271 VXI plug & play Install Disk (software version 3.11). A8130 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 24 (4) Ensure that the screening is continuous through to the chassis of the equipment. (5) Ensure that any associated equipment is CE marked or is of good EMC design and performance. RACAL Instruments Ltd. A8130 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 25 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 26: Installation And Power-Up

    (e.g. a ball-point pen) to move the switches to form the binary address. Logical addresses may be set in the range 1 to 254. Logical address 0 is reserved for slot 0 devices and logical address 255 is reserved for dynamically configured devices. The 3271 VXI Signal Generator does not support dynamic configuration.

  • Page 27: Installing In Vxi Mainframe

    INSTALLATION AND POWER-UP Installing in VXI mainframe This instrument will take up two slots of a C-sized VXI mainframe. Before installation ensure that the mainframe power is off. To install the instrument first set the logical address (see ’Setting logical address’...

  • Page 28: Putting Into Storage

    Front panel connectors and indicators The front panel with its connectors and indicators is shown in Fig. 2-1 below: Fig. 2-1 3271 front panel showing connectors and indicators 50 Ω SMA-type socket. Protected against the application of reverse power of up to RF OUTPUT 50 W.

  • Page 29: Chapter 2 Installation And Power-Up

    OK LED will remain on. Disk installation/loading instructions The 3271 VXI plug & play Install Disk is supplied with this instrument. This includes the VXI plug & play instrument driver and soft front panel. The soft front panel is used to verify instrument communications and functionality when the instrument is first integrated into a system.
  • Page 30 Chapter 3 PROGRAMMING Contents Introduction ............................3-3 Device listening elements .......................3-3 Device talking elements........................3-3 Programming ..........................3-4 Program messages ........................3-4 Compound headers ........................3-4 Program data..........................3-5 Message exchange protocol.....................3-5 Common commands and queries (IEEE 488.2)...............3-5 Device dependent commands ......................3-6 Default settings ..........................3-7 Carrier frequency..........................3-9 RF level ............................3-10 Output control..........................3-12 Modulation mode..........................3-13...
  • Page 31 PROGRAMMING Contents (contd.) Status byte when read by serial poll ..................... 3-42 Summary of status reporting commands and queries ..............3-43 Error messages ........................... 3-44 Error handling ..........................3-44 Background errors:........................ 3-44 Foreground errors: ........................ 3-44 Error queue ........................... 3-44 List of tables Table 3-1 Instrument default settings ....................

  • Page 32: Introduction

    Introduction An IEEE 488.2 program interface is provided. Ease of use is ensured by careful selection of mnemonics. For example, if carrier frequency and RF level are to be set to 2.54 MHz and -27.3 dBm respectively, the VXI instruction message is: CFRQ:VALUE 2.54 MHZ<EOM>...

  • Page 33: Programming

    PROGRAMMING Programming Program messages A message consists of one or more message units. Message units are separated by a semi-colon (;). The whole message is ended by the Program Message Terminator (or End Of Message) defined as one of the following: <newline>...

  • Page 34: Program Data

    *IDN? fields in the format: <manufacturer>,<model>,<serial umber>,<software part number and issue number> where: <manufacture> is RACAL INSTRUMENTS,<model> is the instrument model number, 3271. <serial number> is the instrument serial number in the form nnnnnn/nnn, where n is an ASCII digit in the range 0 to 9.

  • Page 35: Device Dependent Commands

    PROGRAMMING Because an Arbitrary ASCII Response ends with the Response Message Terminator (<EOM>) either *IDN? or *OPT? must be the last Query Message Unit in a Program Message. *RST Reset Command. Sets the instrument functions to the factory default power up state.

  • Page 36: Default Settings

    <str> String Program Data Where the data format is Decimal Numeric Program Data, the value may be expressed as a signed or unsigned number in any of the following formats: nr1: Decimal integer, e.g. 1234 or -567 nr2: Floating point number, e.g. 1.234 or -56.789 nr3: Floating point number with exponent, e.g.
  • Page 37 PROGRAMMING Carrier sweep: Freq mode: Fixed Mode : Single sweep Type: Linear Ext trigger : Start : 9 kHz Stop: 2.4 GHz Step size: 1 kHz Time: 50 ms A8130 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 38: Carrier Frequency

    Carrier frequency These commands enable you to set the carrier frequency in the range 9 kHz to 2.4 GHz to a resolution of 1 Hz. You can adjust the frequency in steps by setting the size of the step and then stepping the frequency up or down.

  • Page 39: Rf Level

    PROGRAMMING RF level These commands enable you to set the RF level in the range -137 to +25 dBm to a resolution of 0.1 dB. You can adjust the level in steps by setting the size of the step and then stepping the level up or down. And after having adjusted the level you can either return to the reference level or make the current level the reference level.
  • Page 40 RFLV (contd.) Select default RF level units. :UNITS Data type : Character Program Data (DBM, DBV, DBMV, DBUV, V, MV or UV) Allowed suffices : None Default suffix : None RFLV:VALUE -27.3DBM;ON Examples: RFLV:TYPE PD;VALUE 1.23UV Set RF Level max limit (short form) :LIMIT :VALUE Set RF Level max limit...

  • Page 41: Output Control

    PROGRAMMING Output control These commands allow you to download and store settings without the output changing. OUTPUT [not used alone] Allows user to download and store settings in the normal way without :DISABLE the output of the instrument changing until the OUTPUT:ENABLE command is received.

  • Page 42: Modulation Mode

    Modulation mode These commands allow you to select the modulation mode between amplitude, frequency and phase modulation as well as binary (2-level) and quadrature (4-level) frequency shift keying. Binary FSK results from a logic level digital signal applied to the TRIGGER INPUT socket. Quadrature FSK is achieved using both the TRIGGER INPUT and PULSE INPUT sockets.

  • Page 43: Modulation Control

    PROGRAMMING Modulation control These commands allow you to switch ALL modulation ON or OFF. [not used alone] Turn modulation globally ON :OFF Turn modulation globally OFF Examples: MOD:ON MOD:OFF MOD? Prepares message containing information on Modulation Control in the following format: :MOD:<status>...

  • Page 44: Frequency Modulation (And Fsk)

    Frequency modulation (and FSK) These commands enable you to select frequency modulation either as a single modulation or as the sum of two signals, to set the deviation rate, to switch the modulation on and off and to perform DC FM nulling.
  • Page 45 PROGRAMMING :PHASE Set phase offset of FM2 relative to FM1 Data type : Decimal Numeric Program Data Allowed suffices : Default suffix : Examples: FM2:MODF:VALUE 1.5KHZ;SIN FM:MODF:PHASE 1.2DEG DCFMNL Perform DC FM null operation (only for EXTDC mode) Data type : None Allowed suffices : None...

  • Page 46: Phase Modulation

    Phase modulation These commands enable you to select phase modulation either as a single modulation or as the sum of two signals, to set the deviation rate in radians, and to switch the modulation on and off. You can set the modulation oscillator frequency and select between sine, triangle and square waveforms.
  • Page 47 PROGRAMMING PM? or PM1? or PM2? Prepares message containing information on Phase Modulation setting in one of the following formats: :PM:DEVN <nr2>;<src>;<status>;INC <nr2> :PM1:DEVN <nr2>;<src>;<status>;INC <nr2> :PM2:DEVN <nr2>;<src>;<status>;INC <nr2> where <src> is a program mnemonic representing the source of the modulation signal and <status>...

  • Page 48: Amplitude Modulation

    Amplitude modulation These commands enable you to select amplitude modulation either as a single modulation or as the sum of two signals, to set the AM depth as a percentage, and to switch the modulation on and off. You can set the modulation oscillator frequency and select between sine, triangle and square waveforms.
  • Page 49 PROGRAMMING AM? or AM1? or AM2? Prepares message containing information on Amplitude Modulation setting in one of the following formats: :AM:DEPTH <nr2>;<src>;<status>;INC <nr2> :AM1:DEPTH <nr2>;<src>;<status>;INC <nr2> :AM2:DEPTH <nr2>;<src>;<status>;INC <nr2> where <src> is a program mnemonic representing the source of the modulation signal and <status>...

  • Page 50: Pulse Modulation

    Pulse modulation You can use these commands to switch the pulse modulation on and off when it is part of the modulation mode. When ON is selected the carrier is modulated by the logic level applied to the PULSE INPUT socket. Pulse ON Logic level between 3.5 and 5 V Pulse OFF...

  • Page 51: Memory Stores

    PROGRAMMING Memory stores Carrier store The non-volatile carrier frequency store has 100 locations numbered 0 to 99 for the storage of carrier frequency only. This store can be used to apply a set of test conditions to a range of frequencies. For example, if you wish to use the same modulation at a variety of frequencies you can use the carrier store to set the instrument to each of the frequencies in turn.

  • Page 52: Memory-Recall

    Memory-recall There are three types of recall: carrier, full and RAM. Both carrier and full stores are non-volatile. The contents of the RAM store are lost when the instrument is switched off. Carrier recall The non-volatile carrier frequency store has 100 locations numbered 0 to 99 for carrier frequency only. These can be recalled and used in conjunction with full recall to apply a set of test conditions to a range of frequencies.

  • Page 53: Memory - Erase

    PROGRAMMING Memory - erase ERASE [not used alone] :CFRQ Erase all Carrier Freq Stores (0-99) :FULL Erase all Full Stores (100-199) :RAM Erase all RAM Stores (200-299) :ALL Erase all Stores (0-299) Data type : None Allowed suffices : None Default suffix : None ERASE:FULL...

  • Page 54: Memory - Triggering

    Memory - triggering For external triggering methods, refer to ’Trigger source’ at the end of this section. MTRIG Enables memory recall triggering to be activated by *TRG command or by external triggering :OFF Disable memory recall triggering Data type : None Allowed suffices : None...

  • Page 55: Sweep Operation

    PROGRAMMING Sweep operation These commands allow you to configure the instrument as a swept carrier signal generator where you define the start and stop frequencies, the step size and time per step. (Note that these commands also appear under ’Carrier frequency’.) To make these commands operational they must first be enabled by the CFRQ:MODE SWEPT command.

  • Page 56: Sweep Mode

    Sweep mode To make these commands operational they must first be enabled by the CFRQ:MODE SWEPT command. These commands enable you to select the sweep mode between single shot and continuous sweep and between linear and logarithmic sweep. You can also select the triggering mode from the following: OFF Disable the trigger.

  • Page 57: Sweep Control

    PROGRAMMING Sweep control To make these commands operational they must first be enabled by the CFRQ:MODE SWEPT command. These commands enable you to start the sweep in the selected increments from the chosen reference frequency, pause the sweep, step the sweep up or down from the paused position, and continue the sweep.

  • Page 58: Trigger Source

    Trigger source These commands enable you to disable the trigger, select the trigger source from one of the eight VXI backplane triggers or to select an external trigger. For external triggering, connect a TTL trigger signal to the TRIGGER INPUT connector. Ensure however, that this socket is not disabled for your application by a higher priority mode having been selected.

  • Page 59: Miscellaneous Commands

    PROGRAMMING Miscellaneous commands Attenuator hold The ATTEN:LOCK command allows you to reduce the RF level by at least another 10 dB without the step attenuator operating. ATTEN [not used alone] :LOCK Lock the Attenuators :UNLOCK Unlock the Attenuators Data type : None Allowed suffices : None...

  • Page 60: Power-Up Options

    MISCELLANEOUS COMMANDS Power-up options These commands allow you to select between powering up with the factory settings (given in Table 3-1) or with the settings of your choice stored in one of the full memory locations (range 100 to 199) or carrier frequency memory locations (range 0 to 99). POWUP [not used alone] :MODE...

  • Page 61: Reverse Power Protection

    PROGRAMMING Reverse power protection Accidental application of power to the RF OUTPUT socket trips the reverse power protection circuit. The following commands enable you to detect when the protection circuit has been tripped, reset the protection (after you have removed the source from the socket), and find out how many times the circuit has tripped.

  • Page 62: Frequency Standard Selection

    MISCELLANEOUS COMMANDS Frequency standard selection These commands enable you to select a 10 MHz output to provide a standard for use with associated equipment, as well as enabling you to select a standard (either external or internal) for use by the instrument.

  • Page 63: Status Byte

    Status byte The Status Byte provides information about events and conditions within the instrument. It may be read by a conventional Serial Poll or its value obtained as a response to the *STB? query. Bits 0 to 5 and bit 7 are each single bit Summary Messages which may be of two types (or not used at all). Queue Status - a ’1’...

  • Page 64: Status Data Structure - Register Model

    STATUS BYTE Status data structure - register model Below is a generalised model of the Register Set which funnels the monitored data into a single summary bit to set the appropriate bit in the Status Byte. Device Status continuously monitored by Condition Register Condition Register Transition...

  • Page 65: Standard Event Registers

    PROGRAMMING Standard event registers This register is defined by IEEE 488.2 and each bit has the meaning shown below:- Condition Register Register <pon> <urq> <cme> <exe> <dde> <qye> <rqc> <opc> Read/Write Commands Transition Filter # <pon> <cme> <rqc> <urq> <exe> <dde>...

  • Page 66: Hardware Event Registers

    STATUS BYTE Hardware event registers This is a device dependent register and the bits have meanings as shown in the list at the bottom of the page. Condition Register HCR? Transition Filter # Register Read/Write Commands Status Register HSR? & &...

  • Page 67: Coupling Event Registers

    PROGRAMMING Coupling event registers This is a device dependent register and the bits have meanings as shown in the list at the bottom of the page. Condition Register CCR? Transition Filter # Register Read/Write Commands Status Register CSR? & & &...

  • Page 68: Instrument Event Registers

    STATUS BYTE Instrument event registers This is a device dependent register and the bits have meanings as shown in the list at the bottom of the page. Condition Register SCR? Transition Filter # Register Read/Write Commands Status Register SSR? & &...

  • Page 69: Queue Flag Details

    PROGRAMMING Queue flag details Input from all Error Conditions Status Byte & Enable Register non-zero From Standard Event Registers Error Queue Response Message Response ERROR? Device Dependant Errors Output Queue <erb> <mss> <mav> <hsb> <csb> <ssb> <esb> Status Byte Register Data from Output Queue C0075 The <mav>...

  • Page 70: Status Byte When Read By *Stb

    STATUS BYTE Status byte when read by *STB? Status Byte Register Register Read Command <erb> <mss> <mav> <hsb> <csb> <ssb> <esb> *STB? & & & & & & & *SRE *SRE? Register Service Request Enable Register# C0073 Read/Write Commands # Bit 6 in this register ignores data sent by *SRE and always returns 0 in response to *SRE? <rqs>, <esb>...

  • Page 71: Status Byte When Read By Serial Poll

    PROGRAMMING Status byte when read by serial poll Status Byte Register <erb> <mss> <mav> <hsb> <csb> <ssb> <esb> Service Request Generation *SRE *SRE? Register Service Request Enable Register# C0074 Read/Write Commands # Bit 6 in this register ignores data sent by *SRE and always returns 0 in response to *SRE? <erb>...

  • Page 72: Summary Of Status Reporting Commands And Queries

    STATUS BYTE Summary of status reporting commands and queries *CLS Clears Status Registers and the Error Queue *ESE<nrf> Writes to Standard Event Enable Register *ESE? Reads from Standard Event Enable Register *ESR? Reads from Standard Event Status Register *SRE<nrf> Writes to Service Request Enable Register *SRE? Reads from Service Request Enable Register *STB?

  • Page 73: Error Messages

    Error messages Error handling Error messages are divided into four groups: Background errors represent a condition of the instrument. Foreground errors generally caused by the user. IEEE488.2 errors generated by incorrect programming. Fatal errors caused by failure associated with the main RAM or the PROM.

  • Page 74: Table 3-3 Background Errors (500 - 599) In Priority Order

    ERROR MESSSAGES Table 3-3 Background errors (500 - 599) in priority order Main PROM faulty Main RAM faulty RPP tripped Fractional-N loop low Fractional-N loop high Ext standard missing External std frequency low External std frequency high VCXO loop low VCXO loop high Amplitude modulator unlevelled Output unlevelled...

  • Page 75: Table 3-4 Foreground Errors (0 - 399)

    PROGRAMMING Table 3-4 Foreground errors (0 - 399) No error EEPROM checksum Pad cal checksum RF cal checksum Freq std checksum Synthesizer cal checksum Mod ref checksum Mod offset checksum Mod amp checksum ALC cal checksum FM cal factor checksum FM tracking checksum ΦM cal factor checksum System cal checksum...

  • Page 76: Table 3-5 Ieee 488.2 Errors (400 - 499)

    ERROR MESSSAGES Table 3-5 IEEE 488.2 errors (400 - 499) Syntax error Unrecognised mnemonic Numeric syntax Data expected Illegal data Too much data Incorrect data type Unrecognised character data Character data not unique Block definition Block size Missing quote Terminator expected Invalid unit Unit not expected No header match found...
  • Page 77 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 78: Technical Description

    TECHNICAL DESCRIPTION Introduction The 3271 VXI Signal Generator is a VXI module which covers a wide range of frequencies from 9 kHz to 2.4 GHz. Output levels from -137 dBm to +25 dBm are available. These are C size, 2-slot wide plug-in modules that require a VXI bus mainframe for operation.
  • Page 79 BRIEF TECHNICAL DESCRIPTION Fig. 4-1 Block schematic diagram A8130 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 80 Chapter 5 ACCEPTANCE TESTING Contents Introduction ............................5-3 Test precautions..........................5-3 Recommended test equipment ......................5-4 Executable soft front panel software....................5-4 TEST PROCEDURES........................5-5 RF output ............................5-5 RF level frequency response....................5-6 ALC linearity...........................5-6 Attenuator accuracy.........................5-7 Carrier frequency accuracy......................5-8 Spectral purity..........................5-9 Harmonics ..........................5-10 Non-harmonics ........................5-11 Residual FM ..........................5-11 SSB phase noise ........................5-12 Internal FM...........................5-13...
  • Page 81 ACCEPTANCE TESTING Table 5-10 Attenuator test at 1140 MHz..................5-34 Table 5-11 Attenuator test at 1740 MHz..................5-34 Table 5-12 Attenuator test at 2400 MHz..................5-35 Table 5-13 Alternative attenuator functional test at 10 MHz ............5-35 Table 5-14 Carrier frequency tests ....................5-36 Table 5-15 Carrier harmonic tests at -4 dBm ................

  • Page 82: Introduction

    Introduction The test procedures in this chapter enable you to verify that the electrical performance of the signal generator complies with the Performance Data given in Chapter 1. For convenience, the test equipment and specification for each test are summarized before the test procedure. Apart from the UUT, (Unit Under Test), no specific set-up procedures will be included for the test equipment unless the measurement is dependent on specific instrument settings or special measurement techniques.

  • Page 83: Recommended Test Equipment

    National Instruments PCIIA GPIB Interface Card Racal Instruments 1261A/B VXI Mainframe Racal Instruments 1260-00C GPIB Slot 0 3271 VXI plug & play Install Disk *IFR Ltd was previously known as Marconi Instruments Ltd ** Option 037 is necessary to measure SSB phase noise.

  • Page 84: Test Procedures

    Test procedures Each test procedure relies on the UUT being set to its power-up conditions. Reset the UUT after each test procedure by setting: Store/Recall Address 999 Recall At the end of this chapter are a set of results tables which give all the test points for each of the tests. These tables should be photocopied and used to record the results of all the measurements taken.

  • Page 85: Rf Level Frequency Response

    ACCEPTANCE TESTING RF level frequency response Test procedure Fig. 5-1 RF output test set-up Perform AUTO ZERO and AUTO CAL on the power meter. Connect the test equipment as shown in Fig. 5-1. On the UUT set: Carr Freq 30 kHz RF Level 0 dBm Record the output level measured by the power meter against each of the carrier frequencies...

  • Page 86: Attenuator Accuracy

    Attenuator accuracy The following test will confirm that the attenuator performs to the published performance specification. In the event of the receiver/down-converter not being available, an alternative method to functionally test the individual pads is also suggested (see ‘Alternative attenuator functional test’ below). Test procedure Fig.

  • Page 87: Carrier Frequency Accuracy

    ACCEPTANCE TESTING Alternative attenuator functional test Connect the test equipment as shown in Fig. 5-1. Perform AUTO ZERO and AUTO CAL on the power meter. On the UUT set: Carr Freq 10 MHz RF Level 13 dBm Latch Select RF Board Shift-Reg 1. Select DATA(binary): Set a reference on the power meter such that 0 dB is indicated.

  • Page 88: Spectral Purity

    Test procedure Fig. 5-3 Carrier frequency accuracy test set-up Connect the test equipment as shown in Fig. 5-3. Connect the internal frequency standard from the UUT to the external standard input on the counter. On the UUT set: Carr Freq 9 kHz RF Level 0 dBm...

  • Page 89: Harmonics

    ACCEPTANCE TESTING Test equipment Description Minimum specification Example Spectrum DC to 7.2 GHz frequency coverage IFR 2386 analyzer Measuring 0 dBm to -127 dBm; 2.5 MHz to 2.4 GHz Capable HP 8902A with receiver of measuring residual FM less than 2 Hz and SSB option 037 phase noise <-124 dBc/Hz at 20 kHz offset from a 1 GHz carrier...

  • Page 90: Non-Harmonics

    Non-harmonics Test procedure Press CAL on the spectrum analyzer. Connect the test equipment as shown in Fig. 5-4. On the UUT set: Carr Freq 1201 MHz RF Level 0 dB Measure the level of the non-harmonics on the spectrum analyzer at each of the carrier frequencies shown in Table 5-20 checking that the results are within specification.

  • Page 91: Ssb Phase Noise

    ACCEPTANCE TESTING SSB phase noise Test procedure Fig. 5-6 SSB phase noise test set-up Connect the test equipment as shown in Fig. 5-6. On the UUT set: Carr Freq 470 MHz RF Level 0 dBm On the measuring receiver: Tune the receiver to 470 MHz. Select 24.0 SPCL to enter selective power measurement mode.

  • Page 92: Internal Fm

    Internal FM Specification Deviation range: 0 to 100 kHz Resolution: 3 digits or 1 Hz Bandwidth (1 dB): DC to 100 kHz (DC coupled) 10 Hz to 100 kHz (AC coupled) 20 Hz to 100 kHz (AC coupled with ALC) ±5% at 1 kHz modulation rate Accuracy: Carrier error:...

  • Page 93: Fm Deviation And Distortion

    ACCEPTANCE TESTING FM deviation and distortion Test procedure Fig. 5-7 Internal modulation and modulation distortion test set-up Connect the test equipment as shown in Fig. 5-7. On the UUT set: Carr Freq 10 MHz RF Level 0 dBm FM1 Level 100 kHz Mod On Source On...

  • Page 94: Carrier Error

    Carrier error Test procedure Connect the test equipment as shown in Fig. 5-7. On the UUT set: Carr Freq 1200 MHz RF Level 0 dBm On the modulation meter select CARRIER ERROR. The FREQUENCY display will read 0.00 kHz. On the UUT set: Mod Mode FM External FM1 Level...

  • Page 95: External Fm Frequency Response (Alc On)

    ACCEPTANCE TESTING On the modulation meter check that the FM reading is between 47.5 kHz and 52.5 kHz, then set a reference using the relative function. Set the function generator to each of the frequencies shown in Table 5-26 checking that the relative readings on the modulation meter are within specification.

  • Page 96: Phase Modulation

    Phase modulation Specification Range: 0 to 10 radians Resolution: 3 digits or 0.01 radians Bandwidth (3 dB): 10 Hz to 10 kHz ±5% at 1 kHz modulation rate Accuracy: Distortion: Less than 3% at 10 radians at 1 kHz modulation rate Test equipment Description Minimum specification...

  • Page 97: Amplitude Modulation

    ACCEPTANCE TESTING On the UUT set mod source to each of the frequencies shown in Table 5-30, measure the deviation on the modulation meter and calculate the phase modulation for each step using the formula in (4). Using the figure recorded in (4) as a reference, calculate the change in response at each modulation frequency using the formula: ...

  • Page 98: Am Scale Shape

    Measure the AM accuracy and distortion at the frequencies shown in Table 5-31 checking that the results are within specification. Set the UUT AM1 level to 80% and repeat (4). Set the UUT to RF level 0 dBm and repeat (2) to (5) using Table 5-32. Set the UUT to RF level +7 dBm and repeat (2) to (5) using Table 5-33.
  • Page 99 ACCEPTANCE TESTING 0 Hz (DC) To measure the AM depth at DC, it will be necessary to use the DC offset facility on the function generator proceeding as follows: Fig. 5-9 0 Hz External AM and distortion test set-up Connect the test equipment as shown in Fig. 5-9. (10) Set the function generator to +1.4142 V DC (temporarily connect the function generator output to the DVM and set this voltage as close as possible to +1.4142 V).

  • Page 100: Pulse Modulation

    Pulse modulation Specification Carrier frequency range: 32 MHz to 2.4 GHz, usable to 10 MHz RF level range: Maximum guaranteed output is reduced to +8 dBm when pulse modulation is selected Maximum additional uncertainty is ±0.5 dB RF level accuracy: On/off ratio: Better than 40 dB Better than 45 dB below 1.2 GHz...

  • Page 101: Pulse Modulation Rise And Fall Time

    ACCEPTANCE TESTING The difference between the levels recorded in (5) and (7) is the pulse mod on/off ratio. Check that the ratio is within specification using Table 5-39. Repeat (4) to (8) for each of the frequencies shown in Table 5-39. Pulse modulation rise and fall time Fig.

  • Page 102: Modulation Oscillator Frequencies

    Test equipment Description Minimum specification Example Frequency 9 kHz to 2.4 GHz Racal 1999 counter 50 Ω load 1 W, 50 Ω nominal impedance, DC to 2.4 GHz Lucas Weinschel (termination) M1404N Audio analyzer Capable of measuring THD of 0.01% at 1 kHz Rohde &...

  • Page 103: Modulation Oscillator Distortion And Lf Output Flatness

    ACCEPTANCE TESTING Modulation oscillator distortion and LF output flatness Test procedure Fig. 5-12 Modulation oscillator distortion test set-up Connect the test equipment as shown in Fig. 5-12. On the UUT set: FM1 Freq 1 kHz Measure the distortion on the audio analyzer checking that the result is within the specification shown in Table 5-42.
  • Page 104 Test procedure Fig. 5-13 External standard test set-up. Connect the test equipment as shown in Fig. 5-13. On the UUT set: Freq Std External 10 Direct Set the signal generator to RF level 220 mV EMF, carrier frequency 1 MHz. Using Table 5-43, check that no external standard error messages are displayed on the UUT.

  • Page 105: Acceptance Test Results Tables

    ACCEPTANCE TESTING ACCEPTANCE TEST RESULTS TABLES For 3271 Signal Generator, serial number _ _ _ _ _ _ / _ _ _ Table 5-1 RF output at 0 dBm Carrier frequency RF level min. Result (dBm) RF level max. (MHz)
  • Page 106 Table 5-2 RF output at +7 dBm Carrier frequency RF level min. Result (dBm) RF level max. (MHz) (dBm) (dBm) 0.03 _______ 0.33 _______ _______ _______ _______ _______ _______ _______ _______ _______ 1020 _______ 1140 _______ 1200 _______ 1201 _______ 1260 _______ 1380...
  • Page 107 ACCEPTANCE TESTING Table 5-3 RF output at +13 dBm Carrier frequency RF level min. Result (dBm) RF level max. (MHz) (dBm) (dBm) 0.03 _______ 0.33 _______ _______ _______ _______ _______ _______ _______ _______ _______ 1020 _______ 1140 _______ 1200 _______ 1201 _______ 1260...
  • Page 108 Table 5-4 RF output at +25 dBm Carrier frequency RF level min. Result (dBm) RF level max. (MHz) (dBm) (dBm) 0.03 _______ 0.33 _______ _______ _______ _______ _______ _______ _______ _______ _______ 1020 _______ 1140 _______ 1200 _______ +19 dBm 1201 _______ 1260...
  • Page 109 ACCEPTANCE TESTING Table 5-5 ALC linearity at 2.5 MHz RF level (dBm) RF level min. Result (dBm) RF level max. (dBm) (dBm) _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ 12.1 +11.1 _______ +13.1...
  • Page 110 Table 5-6 ALC linearity at 500 MHz RF level (dBm) RF level min. Result (dBm) RF level max. (dBm) (dBm) _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ 12.1 +11.1 _______ +13.1 12.2 +11.2...
  • Page 111 ACCEPTANCE TESTING Table 5-7 ALC linearity at 2400 MHz RF level (dBm) RF level min. Result (dBm) RF level max. (dBm) (dBm) _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ 12.1 +10.1 _______ +14.1...
  • Page 112 Table 5-8 Attenuator test at 2.6 MHz RF level (dBm) RF level min. Result (dBm) RF level max. (dBm) (dBm) _______ -4.1 -5.1 _______ -3.1 -15.1 -16.1 _______ -14.1 -26.1 -27.1 _______ -25.1 -37.1 -38.1 _______ -36.1 -48.1 -49.1 _______ -47.1 -59.1 -60.1...
  • Page 113 ACCEPTANCE TESTING Table 5-10 Attenuator test at 1140 MHz RF level (dBm) RF level min. Result (dBm) RF level max. (dBm) (dBm) _______ -4.1 -5.1 _______ -3.1 -15.1 -16.1 _______ -14.1 -26.1 -27.1 _______ -25.1 -37.1 -38.1 _______ -36.1 -48.1 -49.1 _______ -47.1...
  • Page 114 Table 5-12 Attenuator test at 2400 MHz RF level (dBm) RF level min. Result (dBm) RF level max. (dBm) (dBm) _______ -4.1 -6.1 _______ -2.1 -15.1 -17.1 _______ -13.1 -26.1 -28.1 _______ -24.1 -37.1 -39.1 _______ -35.1 -48.1 -50.1 _______ -46.1 -59.1 -61.1...
  • Page 115 ACCEPTANCE TESTING Table 5-14 Carrier frequency tests Frequency (MHz) Frequency min. Result (MHz) Frequency max. (MHz) (MHz) 0.009 _______ _______ 9.999999 _______ 18.75 _______ 37.5 _______ _______ _______ _______ _______ 1200 1199.99988 _______ 1200.00012 1200.000001 _______ 1230 _______ 1250 _______ 1260 _______ 1320...
  • Page 116 Table 5-15 Carrier harmonic tests at -4 dBm Carrier 2nd harmonic Result (MHz) 3rd harmonic Result (MHz) frequency (MHz) max. level max. level (dBc) (dBc) 0.01 _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ 18.7 _______ _______ 18.8 _______ _______ 37.4...
  • Page 117 ACCEPTANCE TESTING Table 5-16 Carrier harmonic tests at 0 dBm Carrier 2nd harmonic Result (MHz) 3rd harmonic Result (MHz) frequency (MHz) max. level max. level (dBc) (dBc) 0.01 _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ 18.7 _______ _______ 18.8 _______...
  • Page 118 Table 5-17 Carrier harmonic tests at +7 dBm Carrier 2nd harmonic Result (MHz) 3rd harmonic Result (MHz) frequency (MHz) max. level max. level (dBc) (dBc) 0.01 _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ 18.7 _______ _______ 18.8 _______ _______ 37.4...
  • Page 119 ACCEPTANCE TESTING Table 5-18 Carrier harmonic tests at +13 dBm Carrier 2nd harmonic Result (MHz) 3rd harmonic Result (MHz) frequency (MHz) max. level max. level (dBc) (dBc) 0.01 _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ 18.7 _______ _______ 18.8 _______...
  • Page 120 Table 5-19 Carrier harmonic tests at +19 dBm Carrier 2nd harmonic Result (MHz) 3rd harmonic Result (MHz) frequency (MHz) max. level max. level (dBc) (dBc) 0.01 _______ _______ _______ _______ _______ _______ _______ _______ _______ _______ 18.7 _______ _______ 18.8 _______ _______ 37.4...
  • Page 121 ACCEPTANCE TESTING Table 5-20 Carrier non-harmonic tests Sub-harmonic output Sub-harmonic output Carrier Non- Non- Result (dBc) Non- Non- Result (dBc) frequency harmonic harmonic harmonic harmonic (MHz) frequency level (dBc) frequency level (dBc) (MHz) (MHz) 1201 800.6667 _______ 1601.3333 _______ 1201 400.3333 _______ 2001.6667...
  • Page 122 Table 5-23 Internal FM deviation and distortion tests at 100 kHz deviation FM Deviation Distortion Carrier FM deviation Result (kHz) FM deviation Distortion (%) Result (%) frequency min. (kHz) max. (kHz) (MHz) _______ <3% _______ 10.144 _______ <3% _______ 10.292 _______ <3% _______...
  • Page 123 ACCEPTANCE TESTING Table 5-24 FM scale shape tests at 15 MHz carrier FM deviation (kHz) FM deviation Result (kHz) FM deviation min. (kHz) max. (kHz) _______ 67.45 _______ 74.55 53.2 _______ 58.8 41.8 _______ 46.2 32.3 _______ 35.7 25.65 _______ 28.35 19.95 _______...
  • Page 124 Table 5-27 External FM frequency response (ALC on), 10 kHz deviation, 0.75 V input Modulation Response Result (dB) Response frequency (kHz) level min. level max. (dB) (dB) 0.02 _______ _______ _______ reference _______ _______ _______ _______ Table 5-28 External FM frequency response (ALC on), 10 kHz deviation, 1.25 V input Modulation Response Result (dB)
  • Page 125 ACCEPTANCE TESTING Table 5-30 Internal ΦM flatness test Modulation Response Result (dB) Response frequency (kHz) level min. level max. (dB) (dB) _______ _______ reference _______ _______ Table 5-31 Internal AM depth and distortion tests at -4 dBm AM depth 30% AM depth 80% Distortion Carrier...
  • Page 126 Table 5-32 Internal AM depth and distortion tests at 0 dBm AM depth 30% AM depth 80% Distortion Carrier min. Result max. min. Result max. Result at Result at frequency 30% depth 80% depth (MHz) (<1.5%) (<2.5%) 28.5 _____ 31.5 _____ _______ _______...
  • Page 127 ACCEPTANCE TESTING Table 5-34 AM scale shape test AM depth (%) AM depth min. Result (%) AM depth max. (%) _______ 10.5 _______ 28.5 _______ 31.5 _______ 47.5 _______ 52.5 _______ 66.5 _______ 73.5 _______ 80.75 _______ 89.25 5-48 A8130 Artisan Technology Group - Quality Instrumentation ...
  • Page 128 Table 5-35 External AM frequency response (ALC off, DC coupled), RF level -4 dBm Modulation Response Result (dB) Response frequency (kHz) level min. (dB) level max. (dB) _______ _______ _______ reference _______ _______ _______ Table 5-36 External AM frequency response (ALC off, DC coupled), RF level +7 dBm Modulation Response Result (dB)
  • Page 129 ACCEPTANCE TESTING Table 5-37 Pulse modulation RF output at -7 dBm Carrier frequency RF level min. Result (dBm) RF level max. (MHz) (dBm) (dBm) -8.3 _______ +5.7 -8.3 _______ +5.7 -8.3 _______ +5.7 -8.3 _______ +5.7 -8.3 _______ +5.7 -8.3 _______ +5.7 -8.3...
  • Page 130 Table 5-38 Pulse modulation RF output at +4 dBm Carrier frequency RF level min. Result (dBm) RF level max. (MHz) (dBm) (dBm) +2.7 _______ +5.3 +2.7 _______ +5.3 +2.7 _______ +5.3 +2.7 _______ +5.3 +2.7 _______ +5.3 +2.7 _______ +5.3 +2.7 _______ +5.3...
  • Page 131 ACCEPTANCE TESTING Table 5-39 Pulse modulation on/off ratio test Carrier frequency Pulse mod. on/off Measured value (dB) (MHz) ratio (dB) >45 _______ >45 _______ >45 _______ 1000 >45 _______ 1200 >45 _______ 1500 >40 _______ 1800 >40 _______ 2100 >40 _______ 2400 >40...
  • Page 132 Table 5-42 Modulation oscillator distortion and LF output tests Mod. oscillator Response Result Response Distortion Result (%) frequency (Hz) level min. level max. (dB) (dB) _______ _______ _______ _______ _______ _______ 1000 reference <0.1% _______ 2000 _______ 5000 _______ 10000 _______ 20000 _______...
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  • Page 134 Index Harmonics test ............5-10 Hazard symbols ............iv About this manual ............. ii Acceptance testing..........5-1 Accessories............. 1-6 IEEE 488.2 mnemonics ALC linearity test ........... 5-6 AM..............3-18 AM depth and distortion test ........ 5-18 ATTEN.............3-29 AM scale shape test..........5-19 ATTEN? ............3-29 Amplitude modulation..........
  • Page 135 INDEX RCL ..............3-22 Power-up options ..........3-30 RFLV ............3-9, 3-11 Programming............3-1 RFLV? ............ 3-10, 3-11 Pulse modulation ..........3-20 RPP ..............3-31 Pulse modulation on/off ratio test......5-21 *RST..............3-6 Pulse modulation RF level frequency response SCR?..............3-42 test ..............5-21 SOURCE?............3-28 Pulse modulation rise and fall time test....
  • Page 136 RACAL INSTRUMENTATION GROUP ADDRESSES Racal Instruments Ltd. 480 Bath Road, Slough, Berkshire SL1 6BE, United Kingdom Tel: +44 (0) 1628 604455 Telex: 847020 Fax: +44 (0) 1628 662017 Racal Instruments Inc 4 Goodyear Street, P.O.Box C-19541, Irvine Ca 92718, USA Tel: +1 714 859 8999 Telex: 678341 Fax: +1 714 859 2505 Racal Systems Electronique S.A.
  • Page 137 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...