Page 1 CDMA INTERFERER MULTISOURCE GENERATOR 2026Q Operating Manual Document part no. 46892/361 Issue 8 12 November 2004...
Page 2 CDMA INTERFERER MULTISOURCE GENERATOR 2026Q 10 kHz to 2.4 GHz This manual applies to instruments with software issues of 2.01 and higher.  Aeroflex International Ltd. 2004 No part of this document may be reproduced or transmitted in any form...
Page 3 About this manual This manual explains how to use the 2026Q CDMA Interferer MultiSource Generator. Intended audience Persons who have a need for accurately generated signals in the VHF and UHF spectrum. It is assumed that the reader will be familiar with telecommunication terms used in modern communication systems.
Page 4: Table Of Contents
Contents Preface ................................iv Precautions................................. v Précautions..............................viii Vorsichtsmaßnahmen............................xi Precauzioni..............................xiv Precauciones..............................xvii Chapter 1 GENERAL INFORMATION .....................1-1 Chapter 2 INSTALLATION .........................2-1 Chapter 3 LOCAL OPERATION.........................3-1 First-time use ..........................3-7 Individual source operation.....................3-15 Sweep ............................3-25 Utilities............................3-29 Memory .............................3-43 Error messages..........................3-47 Chapter 4 SETUP ............................4-1 Combiner setup...........................4-3 Coupling ............................4-5 Applications..........................4-7...
Page 5: Preface
Preface PATENT PROTECTION The 2026Q CDMA Interferer MultiSource Generator is protected by the following patents: EP 0322139 GB 2214012 US 4870384 EP 0125790 GB 2140232 US 4609881 US 5781600 US 5974362...
Page 6: Precautions
Precautions These terms have specific meanings in this manual: information to prevent personal injury. WARNING information to prevent damage to the equipment. important general information. Hazard symbols The meaning of hazard symbols appearing on the equipment and in the documentation is as follows: Symbol Description...
Page 7 PRECAUTIONS transposed to the neutral conductor, in which case, parts of the equipment could remain at supply potential even after the fuse has ruptured. WARNING 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 with current requirements of this equipment.
Page 8 PRECAUTIONS Suitability for use This equipment has been designed and manufactured by Aeroflex to generate low-power RF signals for testing radio communications apparatus. If the equipment is not used in a manner specified by Aeroflex, the protection provided by the equipment may be impaired. Aeroflex 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.
Page 9: Précautions
PRECAUTIONS Précautions Les termes suivants ont, dans ce manuel, des significations particulières: contient des informations pour éviter toute blessure au personnel. WARNING contient des informations pour éviter les dommages aux équipements. contient d'importantes informations d'ordre général. Symboles signalant un risque La signification des symboles de danger apparaissant sur l'équipement et dans la documentation est la suivante: Symbole...
Page 10 PRECAUTIONS neutre. Dans ce cas, certaines parties de l’appareil peuvent rester à un certain potentiel même après coupure du fusible. WARNING Risque lie au feu Lors du remplacement des fusibles vérifiez l'exactitude de leur type et de leur valeur. Si le cable d'alimentation comporte une prise avec fusible intégré, assurez vous que sa valeur est compatible avec les besoins en courant de l'appareil.
Page 11 PRECAUTIONS Utilisation Cet équipement a été conçu et fabriqué par Aeroflex pour générer des signaux RF de faible puissance pour le test d'appareils de radio communications. La protection de l'équipement peut être altérée s'il n'est pas utilisé dans les conditions spécifiées par Aeroflex. Aeroflex n'a aucun contrôle sur l'usage de l'instrument, et ne pourra être tenu pour responsable en cas d'événement survenant suite à...
Page 12: Vorsichtsmaßnahmen
PRECAUTIONS Vorsichtsma nahmen ß Diese Hinweise haben eine bestimmte Bedeutung in diesem Handbuch: dienen zur Vermeidung von Verletzungsrisiken. WARNING dienen dem Schutz der Geräte. enthalten wichtige Informationen. Gefahrensymbole Die Bedeutung der Gefahrensymbole auf den Geräten und in der Dokumentation ist wie folgt: Symbol Gefahrenart Beziehen Sie sich auf die Bedienungsanleitung wenn...
Page 13 PRECAUTIONS Sicherung in der Masseleitung liegen, so daß auch bei geschmolzener Sicherung Geräteteile immer noch auf Spannungspotential sind. WARNING Feuergefahr Es dürfen nur Ersatzsicherungen vom gleichen Typ mit den korrekten Spezifikationen entsprechend der Stromaufnahme des Gerätes verwendet werden. Siehe hierzu die Leistungsdaten (Performance Data) in Kapitel 1.
Page 14 PRECAUTIONS WARNING Schrägstellung Bei Schrägstellung des Geräts sollten aus Stabilitätsgründen keine anderen Geräte darauf gestellt werden. Eignung für Gebrauch Dieses Gerät wurde von Aeroflex entwickelt und hergestellt um HF Signale geringer Leistung zum Test von Kommunikationseinrichtungen zu erzeugen. Sollte das Gerät nicht auf die von Aeroflex vorgesehene Art und Weise verwendet werden, kann die Schutzfunktion des Gerätes beeinträchtigt werden.
Page 15: Precauzioni
PRECAUTIONS Precauzioni Questi termini vengono utilizzati in questo manuale con significati specifici: riportano informazioni atte ad evitare possibili pericoli alla persona. WARNING riportano informazioni per evitare possibili pericoli all'apparecchiatura. riportano importanti informazioni di carattere generale. Simboli di pericolo Il significato del simbolo di pericolo riportato sugli strumenti e nella documentazione è il seguente: Simbolo Tipo di pericolo...
Page 16 PRECAUTIONS Fusibili Notare che un fusibile è posto sul filo caldo del cavo di alimentazione. Qualora l’alimentazione avvenga tramite due poli non polarizzati, è possibile che il fusibile vada a protezione del neutro per cui anche in caso di una sua rottura, l’apparato potrebbe restare sotto tensione. WARNING Pericolo d'incendio Assicurarsi che, in caso di sostituzione, vengano utilizzati solo fusibili della portata e del tipo...
Page 17 PRECAUTIONS WARNING Posizionamento inclinato Quando lo strumento è in posizione inclinata è raccomandato, per motivi di stabilità, non sovrapporre altri strumenti. Caratteristiche d’uso Questo strumento è stato progettato e prodotto da Aeroflex generare segnali RF in bassa potenza per provare apparati di radio comunicazione. Se lo strumento non è utilizzato nel modo specificato da Aeroflex, le protezioni previste sullo strumento potrebbero risultare inefficaci.
Page 18: Precauciones
PRECAUTIONS Precauciones Estos términos tienen significados específicos en este manual: contienen información referente a prevención de daños personales. WARNING contienen información referente a prevención de daños en equipos. contienen información general importante. Símbolos de peligro El significado de los símbolos de peligro en el equipo y en la documentación es el siguiente: Símbolo Naturaleza del peligro Vea el manual de funcionamiento cuando este símbolo...
Page 19 PRECAUTIONS polaridad, el fusible puede pasar a estar en serie con el neutro, en cuyo caso existen partes del equipo que permanecerían a tensión de red incluso después de que el fusible haya fundido. WARNING Peligro de incendio Asegúrese de utilizar sólo fusibles del tipo y valores especificados como recuesto. Si se utiliza una clavija con fusible incorporado, asegúrese de que los valores del fusible corresponden a los requeridos por el equipo.
Page 20 PRECAUTIONS Idoneidad de uso Este equipo ha sido diseñado y fabricado por Aeroflex para generar señales de VHF y UHF de bajo nivel de potencia para prueba de equipos de radiocomunicaciones. Si el equipo fuese utilizado de forma diferente a la especificada por Aeroflex, la protección ofrecida por el equipo pudiera quedar reducida.
Page 21 Frequency sweep ........................1-4 Memory ..........................1-4 Programming ........................1-4 Calibration data ........................1-5 Spectral purity ........................1-5 Calibration ..........................1-5 Performance data ......................... 1-6 Versions, options and accessories ..................... 1-11 List of figures Fig. 1-1 2026Q simplified block diagram................... 1-2...
Page 22: Introduction
RF switching mechanism that would otherwise affect the test result. The 2026Q is configured to ensure high levels of isolation between each of the transmit and receive paths between the radio test set, the interfering signal sources and the transceiver under test.
Page 23: Main Features
GENERAL INFORMATION network before being fed to a separate combined RF output. Both sources cover the full frequency range of 10 kHz to 2.4 GHz with an output power of between −137 and +24 dBm. Each signal source can be controlled independently in frequency and level, and each has its own amplitude, frequency, phase, FSK and pulse modulation capability.
Page 24: Frequency Sweep
GENERAL INFORMATION combined to give a number of modulation modes. The pulse modulation can be used in combination with the other forms of modulation. The frequency modulation range provides a 1 dB bandwidth of typically 100 kHz and provides FM deviation of 0 to 100 kHz. AC or DC coupled FM can be selected. Phase modulation is provided with a 3 dB bandwidth of 10 kHz and deviation range of 0 to 10 radians.
Page 25: Calibration Data
GENERAL INFORMATION Calibration data All alignment data is derived digitally. Realignment can be undertaken, without removing covers, by protected front-panel functions or via the GPIB interface. Spectral purity With an SSB phase noise performance of typically −121 dBc/Hz at 20 kHz offset from a 1 GHz carrier, these instruments can be used for both in-channel and adjacent channel receiver measurements.
Page 26: Performance Data
GENERAL INFORMATION Performance data Carrier frequency Range Individual outputs: 10 kHz to 2.4 GHz with a resolution of 1 Hz. Combined output: 800 MHz to 2.0 GHz with a resolution of 1 Hz. Accuracy: As frequency standard. RF output Range Individual outputs: −137 dBm to +24 dBm (output power above +20 dBm is uncalibrated for frequencies above 1.2 GHz).
Page 27 GENERAL INFORMATION CONNECTION TO RADIO: <1.6:1 (typically 1.25:1), 865 to 1990 MHz. OUTPUT TO RADIO TEST <1.35:1, 865 to 1990 MHz. Maximum safe power (matched) INPUT FROM RADIO TEST +19 dBm. CONNECTION TO RADIO: +33 dBm. OUTPUT TO RADIO TEST +33 dBm.
Page 28 GENERAL INFORMATION As FM deviation accuracy. Accuracy: ±3.2 µs. Timing jitter: th - order Bessel, −3 dB at 3.9 kHz. Filter: Phase modulation 0 to 10 radians. Range: 3 digits or 0.01 radians. Resolution: ±5% of indicated deviation at 1 kHz modulation rate (excluding residual Accuracy: phase modulation).
Page 29 GENERAL INFORMATION Levels the applied external modulation over the range 0.75 to 1.25 V Modulation ALC: RMS. High and low indicators in display indicate when the input is outside leveling range. Sweep mode Any or all of the sources may be set to a carrier frequency sweep mode. The sweeps are defined by entry of the start, stop and step frequencies.
Page 30 GENERAL INFORMATION control or from the front panel. There are no mechanical adjustments required for realignment. Dimensions and weight Height Width Depth Weight 177 mm 419 mm 488 mm <17 kg 1-10...
Page 31: Versions, Options And Accessories
GENERAL INFORMATION Versions, options and accessories When ordering please quote the full ordering number information. Ordering numbers Versions 2026Q 800 MHz to 2 GHz CDMA Interferer MultiSource Generator Supplied with 46882/361 Operating manual (this manual). − AC power supply lead (see ‘Power cords’, Chapter 2).
Page 32 Longacres House, Six Hills Way, Stevenage, Hertfordshire, UK SG1 2AN Herewith declares that the product: Equipment Description: CDMA Interferer/MultiSource Generator Model No. 2026Q Options: – is in conformity with the following EC directive(s) (including all applicable amendments) Reference No. Title:...
Page 33 Chapter 2 INSTALLATION Contents Mounting arrangements......................... 2-2 Installation requirements ....................... 2-2 Ventilation ..........................2-2 Class I power cords ........................ 2-2 Goods-in checks ..........................2-5 Connecting to supply........................2-5 Fuse ............................2-5 General purpose interface bus (GPIB)................... 2-5 GPIB cable connection......................2-5 GPIB connector contact assignments ..................
Page 34: Mounting Arrangements
In the event that a molded plug has to be removed from a lead, it must be disposed of immediately. A plug with bare flexible cords is hazardous if engaged in a live socket outlet. Power cords with the following terminations are available from IFR Ltd. Please check with your local sales office for availability.
Page 35 Failure to ground the equipment may expose the operator to hazardous voltage levels. Depending upon the destination country, the color coding of the wires will differ: Wire ended Country IEC 320 plug type IFR part number GREEN/YELLOW EARTH Universal Straight through...
Page 36 INSTALLATION Français Le câble d’alimentation d’Europe Continentale est muni d’un connecteur mâle à angle droit type CEI83, standard C4 (CEE 7/7), qui peut être utilisé dans une prise femelle à ergot de terre (standard C 3b) ou à clips latéraux (standard C 2b), cette dernière étant communément appelée prise “Schuko”...
Page 37: Goods-In Checks
INSTALLATION Goods-in checks The following goods-in check verifies that the instrument is functioning correctly, but does not verify conformance to the listed specification. To verify that the instrument conforms to the specification given in Chapter 1, refer to Chapter 7, ‘Acceptance testing’. (1) Ensure that the correct fuse is fitted (accessible from the rear panel) and connect the instrument to the supply.
Page 38: Gpib Connector Contact Assignments
INSTALLATION GPIB connector contact assignments The contact assignments of the GPIB cable connector are as given in the table below and shown in Fig. 2-1. Contact Function Contact Function Data I/O 1 DataI/O 5 Data I/O 2 DataI/O 6 Data I/O 3 DataI/O 7 Data I/O 4 DataI/O 8...
Page 39: Interface Bus Connection
Clear to send Ring indicator The RS-232 interface can be connected to a personal computer’s AT connector using a null-modem cable. A suitable cable is available from IFR − see Chapter 1, ‘Versions, options and accessories’. Auxiliary port connector The rear-panel 25-way female D-type AUXILIARY PORT connector is shown in Fig.
Page 40: Fsk Operation
INSTALLATION FSK operation Data for FSK operation is carried on the contacts of the AUXILIARY PORT as shown by Table 2-1 below. The unused contacts are left unconnected. Table 2-1 Auxiliary port contact assignments CONTACT FUNCTION Source A − FSK A Source A −...
Page 41: Rack Mounting
INSTALLATION Rack mounting The instrument, which is normally supplied for bench mounting, may be mounted in a standard 19-inch rack (see Chapter 1, ‘Versions, options and accessories’). There are two slide rack-mounting kits to accommodate different depths of cabinet. These kits include full fitting instructions.
Page 42: Cleaning
The above information is provided for guidance only. IFR Ltd designs and constructs its products in accordance with International Safety Standards such that in normal use they represent no hazard to the operator. IFR Ltd reserves the right to amend the above information in the course of its continuing commitment to product safety.
Page 43: Chapter 3 Local Operation
Chapter 3 LOCAL OPERATION Introduction This chapter explains how to: • Set up the multisource generator to produce a typical basic signal. • Select the main operating parameters: carrier frequency, output level and type of modulation. • Use the full range of supporting facilities.
Page 44 The numerical keys are used to set parameters ò][ñ to specific values which can also be varied in steps of any size by using the [ ] keys or the rotary control knob. CDMA interferer MultiSource generator 2026Q ENTER SETUP SIG GEN ms mV...
Page 45 LOCAL OPERATION Control knob When enabled by the [KNOB ON/OFF] key, adjusts the value of the selected parameter. [KNOB ON/OFF] Enables or disables the control knob. When control knob enabled, decreases knob resolution by a [×10] factor of 10. When control knob enabled, increases knob resolution by a [÷10] factor of 10.
Page 46 FUSE RATING T4AL250V INPUT FROM RADIO TEST SET AUXILIARY PORT C5818 Fig. 3-2 2026Q rear panel EXT STD I/P BNC connector for the input of an external standard frequency of either 1 MHz or 10 MHz. INT STD O/P BNC connector for the output of the internal 10 MHz standard.
Page 47: First-Time Use
FM, and that the panel for the A signal source is highlighted at the bottom left of the screen. This indicates that these parameters apply only to the A source. B3883 Fig. 3-3 2026Q signal generator menu in normal operation showing default display (with the A source panel highlighted)
Page 48 FIRST TIME USE Display Before entering any parameters it will be found useful to look at the effect that pressing various keys has on the display for the Signal Generator menu. This is the main display and it is divided into a number of fields as shown in Fig.
Page 49 FIRST TIME USE Carrier frequency RF level Frequency standard Modulation state Soft Soft keys keys Modulation Error message Signal source C3884 Fig. 3-4 Division of the Signal Generator menu (main display) into fields...
Page 50 FIRST TIME USE Modulation field This field shows all the current modulation settings for the selected signal source: type of modulation; modulation deviation/depth; modulation frequency; waveform type (shown graphically); modulation ON or OFF. The type of modulation is selected by the [FM], [AM] and [ ϕ M] keys. Only two of the three keys are shown at any time.
Page 51 FIRST TIME USE Selecting functions and keyboard entry Whenever one of the main functions − carrier frequency, RF level, modulation − is highlighted on the main screen, making any terminated numerical entry will be accepted as being a changed parameter for that function. This enables you to enter, for example, a sequence of carrier frequencies without having to re-press the [Carrier Freq] key for each entry.
Page 52 FIRST TIME USE Parameter adjustment When a function has been selected, you can increment or decrement its parameter either continuously using the control knob or in steps using the [ñ] and [ò] keys. You can also simultaneously adjust two parameters by means of the [KNOB LOCK] key. Using the control knob You enable the control knob by pressing the [KNOB ON/OFF] key so that the parameter to be adjusted is displayed outlined by a bracket.
Page 53 FIRST TIME USE Using the steps keys The selected function’s parameter may be adjusted in steps using the [ñ] and [ò] keys to respectively increment and decrement the parameter. The step size can be set as follows: (1) Press the [SET ∆] key which causes the Steps Menu to be displayed (see Fig. 3-5 below). This shows the step sizes of the currently selected signal source.
Page 54 FIRST TIME USE Displaying shifts You can check the difference between the keyed-in value (the reference) and the current value, as well as restoring the reference either to the original value or resetting it to the new value. Proceed as follows: (1) Press [TOTAL ∆] to display the Total Shift Menu for the selected signal source.
Page 55 FIRST TIME USE Combiner summary The [Σ] hard key may be used to display a summary of all the sources’ frequencies and levels and provides an easy means to change these parameters. This menu is also used to implement the attenuator lock function for each individual source.
Page 56: Individual Source Operation
Individual source operation The following section describes the method of controlling the settings of the individual signal sources. The method of control can be used irrespective of the routing of the signal source output, whether to its own RF OUTPUT or to the CONNECTION TO RADIO connector, and irrespective of any coupling that may have been set up.
Page 57 INDIVIDUAL SOURCE OPERATION Carrier on/off The carrier can be switched on or off at any time by means of the [RF ON/OFF] key. This effectively switches the output on and off, retaining the 50 Ω output impedance. RF level selection −...
Page 58 INDIVIDUAL SOURCE OPERATION Reverse power protection Accidental application of power to an individual signal source’s RF OUTPUT socket trips the reverse power protection circuit (RPP) and a menu similar to that shown in Fig. 3-9 below appears with a flashing message. RPP B RPP B Reset...
Page 59 INDIVIDUAL SOURCE OPERATION Mode selection Modulation mode is selected as follows: (1) Press the [UTIL] hard key to display the Utilities Selection Menu 1 (additionally pressing [Utils Menu 1] if necessary). Then select [Mod’n Mode] to display the Modulation Mode Selection Menu.
Page 60 INDIVIDUAL SOURCE OPERATION If a dual mixed modulation mode (for example, AM1 internal & FM external) has been selected, the modulation field is divided horizontally into two panels, one for each modulation source as shown in Fig. 3-12 below. B3903 Fig.
Page 61 INDIVIDUAL SOURCE OPERATION Internal waveform selection Having selected an internal modulation mode, you can select the type of waveform as follows: (1) Press [SIG GEN] to show the Signal Generator menu. (2) Press [Select Waveform] to display the Internal Source Waveform Menu. This shows the currently selected modulation and waveform (see Fig.
Page 62 INDIVIDUAL SOURCE OPERATION (7) Press [Phase Diff] and adjust the phase using the control knob. Turn clockwise to advance the phase and anticlockwise to retard the phase. Note that if you have set the source phase and subsequently adjusted the source frequency or changed the waveform, the menu Phase Difference: value will be blanked.
Page 63 INDIVIDUAL SOURCE OPERATION Modulation ON/OFF [Mod ON/OFF] switches all modulation ON or OFF and the condition is indicated in the centre of the Signal Generator menu: Modulation DISABLED Modulation is also controlled by the individual modulation ON/OFF keys. For modulation to appear on the carrier, modulation must be both enabled with the [Mod ON/OFF] key and the individual [AM ON/OFF], [FM ON/OFF], [ ϕ...
Page 64 INDIVIDUAL SOURCE OPERATION Frequency modulation selection Select frequency modulation as follows: (1) Press [SIG GEN] to show the Signal Generator menu with the current modulation displayed in the bottom half of the screen. (2) Press the [FM] soft key if displayed (otherwise the instrument is already in the FM mode). (3) Press [FM Devn].
Page 65 INDIVIDUAL SOURCE OPERATION (5) Press [Pulse ON/OFF] to toggle between the ON and OFF states until the display shows Pulse ON. When ON the carrier is controlled by the logic level applied to the PULSE INPUT socket. A logical ‘1’ (a voltage between 3.5 and 5 V) allows carrier output, a logical ‘0’ (a voltage between 0 and 1.0 V) suppresses it.
Page 66: Sweep
Sweep The sweep capability allows the comprehensive testing of systems, since measurements at single points will not necessarily give an overall indication of the performance. The sweep function is specified by the following parameters: • Start frequency • Stop frequency •...
Page 67 SWEEP (3) Select the A or B source for sweeping by pressing the appropriate [A Swept Source] or [B Swept Source] key. (4) Select the sweep mode between single shot and continuous sweeping by pressing the [Sweep] key which toggles between [Single Sweep] and [Cont Sweep]. (5) For external triggering press [Ext Trig Off] to inhibit the external trigger or press one of the following keys to select the appropriate trigger mode: [Ext Trig Start] −...
Page 68 SWEEP Sweep control (8) The Sweep Control screen displayed is similar to that shown in Fig. 3-20 below. This is used to perform the sweeping operation. B3911 Fig. 3-20 Sweep control screen in sweep mode (with the B source coupled to the A source) (9) Enter the sweep start and stop frequencies using the [Start Freq] and [Stop Freq] keys.
Page 69: Utilities
Utilities Utility menu selection Pressing the [UTIL] key gains access to the utilities options from two primary menus, Utilities Selection Menu 1 and Utilities Selection Menu 2. When a selection is made from either of these menus and then [UTIL] is pressed, the primary menu is re-displayed. However, if a selection is made and then one of the other hard keys (for example, [MEM]) is pressed, pressing [UTIL] once returns to the sub-menu, pressing it again returns to the primary menu.
Page 70 UTILITIES Display adjustment (menu 1) You can set the display contrast and brightness to suit your individual preferences using this utility. The setting can then be saved for automatic recall whenever the instrument is switched on. Proceed as follows: (1) Select [Display Adjust] to call up the Display Adjustment Utility shown in Fig. 3-22 below. B3913 Fig.
Page 71 UTILITIES Frequency standard selection (menu 1) This utility enables you to select a 10 MHz output as a standard for use with associated equipment. It also enables you to select a standard (either external or internal) for use by the instrument. When an external standard is selected, the internal TCXO is locked to the external standard using a phase locked loop.
Page 72 UTILITIES Carrier phase adjustment (menu 1) You can adjust the phase offset of the carrier with respect to its current phase in degrees as follows: (1) Press [Carrier Phase] to display the Carrier Phase Adjustment Utility shown in Fig. 3-24 below.
Page 73 UTILITIES RF level units selection (menu 1) RF output level units may be changed as follows: (1) Press [RF Level Units] to display the RF Level Units Selection Menu which shows the current selection (see Fig. 3-25 below). B3916 Fig. 3-25 RF level units selection menu (2) Select between linear and logarithmic units in EMF or PD.
Page 74 UTILITIES 50 Ω Ω Ω Ω /75 Ω Ω Ω Ω impedance selection (menu 1) The performance specification of each signal source assumes operation into 50 Ω loads. By means of this menu in association with a 75 Ω adapter (see data sheet in Chapter 1) you can select operation into 75 Ω...
Page 75 UTILITIES Power-up options (menu 1) The instrument can power-up in one of two states; with the factory settings or with the settings of your choice stored in one of the full memory locations. Selection is made as follows: (1) Press [Power Up Options] to display the Power Up Options Menu shown in Fig. 3-27 below. This shows the currently selected power-up choice.
Page 76 UTILITIES Default settings The instrument is reset to the factory default settings in the following cases: (1) At power-up to factory default settings. (2) Following execution of the * RST command. (3) When [Factory Recall] is pressed on the Memory Recall Menu. The default settings are shown in Table 3-1.
Page 77 UTILITIES Modulation mode selection (menu 1) Modulation mode is selected by pressing [Mod’n Mode] to display the Modulation Mode Selection Menu shown in Fig. 3-28 below. Use of the menu is explained earlier under ‘Modulation mode selection’. B3919 Fig. 3-28 Modulation mode selection menu 3-35...
Page 78 UTILITIES Remote control selection (menu 1) The remote mode of operation is selected as follows: (1) Select [Remote Control] to display the Remote Control Utility. This shows the currently selected remote mode (see Fig. 3-29 below). B3920 Fig. 3-29 Remote control utility (2) Press [GPIB/RS232] to toggle between GPIB and RS232.
Page 79 UTILITIES Background error reporting (menu 1) Background errors are generated due to an incorrect operating condition within the instrument. These error messages are generated automatically to warn the operator. Although there is only room to display one message in the error message field of the displays, this utility enables a complete list of the current background errors to be shown.
Page 80 UTILITIES Protection locking and unlocking (menu 1) To prevent accidental interference with the contents of internal memories, internal data is protected by secure key sequences. There are two levels of protection. The most secure, Level 2, is used for memory erasure, elapsed time reporting and for servicing purposes such as altering the calibration data of the instrument.
Page 81 UTILITIES Selection menu 2 Press the [Utils Menu 2] on the Utilities Selection Menu 1 to obtain the display for Utilities Selection Menu 2 as shown in Fig. 3-32 below. Some of the items on this menu are intended for use in servicing and are described in the maintenance manual.
Page 82 UTILITIES Hardware information (menu 2) You can obtain a description of the instrument’s hardware by pressing [Hardware Status] which causes Fig. 3-34 below to be displayed. This shows the instrument type and serial number as well as options fitted. B3925 Fig.
Page 83 UTILITIES Display blanking (menu 2) This facility is used to prevent sensitive data from being displayed. It allows various parts of the display to be replaced by a series of dashes so that values entered by the user or recalled from the memory will not be visible.
Page 84 UTILITIES Latch access utility (menu 2) This utility is intended for use as a diagnostic aid by allowing data to be sent to latches within the instrument. For further information consult the maintenance manual. The menu is shown in Fig. 3-37 below. B3928 Fig.
Page 85 UTILITIES RPP trip count utility (menu 2) This utility lists the number of times each of the fitted sources has tripped. The screen is shown in Fig. 3-39 below. B3930 Fig. 3-39 RPP trip count utility Display test utility (menu 2) This utility provides a simple test of the display.
Page 86 UTILITIES Key/knob tests (menu 2) In this utility the user is invited to operate the keys and control knob whilst checking the reaction of the instrument. The screen is shown in Fig. 3-41 below. B3528 Fig. 3-41 Keyboard/knob test utility Calibration utility (menu 2) This menu shows when each individual item was last adjusted and enables you to enter the date of the current adjustment.
Page 87: Memory
Memory Memory stores There are three types of store: 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. Each type of store holds the data for all fitted sources. Carrier store The non-volatile carrier frequency store has 100 locations numbered 0 to 99 for the storage of carrier frequency only.
Page 88 MEMORY Storing data Select the memory store function as follows: (1) Press the [MEM] hard key and then, if necessary, press the [Store/Recall] soft key to display the Memory Store Menu shown in Fig. 3-43 below. B3933 Fig. 3-43 Memory store menu (2) To store data, press the [Full Store], [Carrier Store] or [RAM Store] key for the type of store required, then enter the store location via the numerical key pad and terminate with [ENTER].
Page 89 MEMORY Memory protection menu (4) To change the write protection, the instrument must be unlocked to Level 1 (see ‘Protection locking and unlocking’ on page 3-37). Subsequently pressing [Memory Protect] causes the Memory Write Protection Menu similar to that shown in Fig. 3-45 below to be displayed. B3935 Fig.
Page 90 MEMORY Recalling data Select the memory recall function as follows: (1) Press the [MEM] hard key and then, if necessary, press the [Store/Recall] soft key to display the Memory Recall Menu shown in Fig. 3-46 below. B3936 Fig. 3-46 Memory recall menu (2) To recall data, press the [Full Store], [Carrier Store] or [RAM Store] key for the type of recall required, then enter the store location via the numerical key pad and terminate with [ENTER].
Page 91: Error Messages
Error messages Error handling Error messages are divided into four groups: − represent a condition of the instrument. Background errors − generally caused by the user. Foreground errors − generated by incorrect programming. GPIB errors caused by failure associated with the main RAM or the −...
Page 92 ERROR MESSAGES Source-specific errors Where it is necessary to identify the signal source causing an error, the error message number has 1000 or 2000 added to it for the A or B source respectively. Thus error number 2500 indicates that the B source has tripped the reverse power protection circuit.
Page 93 ERROR MESSAGES Table 3-3 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 ‡...
Page 94 ERROR MESSAGES Foreground errors (0 − − − − 399) − − − − continued Transmit buffer full Receiver not enabled Protected utility - Level 1 Protected utility - Level 2 This store is Read Only Receive buffer full Pulse has been disabled ‡...
Page 95: Chapter 4 Setup
Chapter 4 SETUP Summary The setup menus are used to route the outputs from the signal sources to either their individual RF OUTPUT sockets or, via the combiner, to the CONNECTION TO RADIO socket and additionally allow the sources to be coupled together by a mathematical formula in both frequency and level. The routing is set using the combiner setup facility and the coupling parameters are enabled and set using the coupling setup facility.
Page 96: Combiner Setup
Combiner setup This facility allows the user to route an individual signal source (A or B) to either its designated separate RF OUTPUT connector or through the combiner to the CONNECTION TO RADIO connector. The current routing of the signal sources is always indicated by the source field at the bottom of the display.
Page 97: Coupling
Coupling Frequency and level coupling Many measurements are made where it is convenient if the carrier frequencies and RF levels of signal sources are automatically related to each other. The coupling setup facility allows two signal sources to be coupled together in frequency and/or level. The frequencies can be coupled with a defined offset value (for example 10.7 MHz), and can be harmonically related.
Page 98 COUPLING Frequency (2) Select the required source by pressing [A & B Coupling]. (3) Select [Freq Offset] and enter the required offset from the A source, positive or negative, up to the instrument’s maximum frequency and terminate with the [Hz], [kHz], [MHz] or [GHz] key.
Page 99: Applications
Applications Applications summary The 2026Q Multisource Generator supports a number of measurement applications which require two signal sources to be coupled together. In addition to automatically selecting the most appropriate signal routing format, the applications mode also automatically couples the sources together and modifies the descriptions of the parameters entered to best suit the application.
Page 100 The 2026Q can support 2-tone intermodulation testing. The number of tones can also be increased by using the external source input, INPUT FROM RADIO TEST SET, for the connection of external generators.
Page 101 APPLICATIONS (4) The spectral diagram shows the default setting with the B source offset higher in frequency than the A source for a 2-tone test. You can reverse this setting so that the B source is at the lower frequency by entering a negative offset frequency. Also shown is that both signals have the same RF level.
Page 102 APPLICATIONS (11) To choose another application or to cancel the current application and return to normal operation, press [SETUP]. This causes the Setup Menu shown in Fig. 4-9 below to be displayed. The screen is split horizontally in two, with the upper part displaying the application mode and the lower part displaying the application cancellation selection.
Page 103 APPLICATIONS (2) Connect the receiver under test to the output from the combiner (CONNECTION TO RADIO socket) as shown by the block diagram. (3) Press [Spectral Diagram] which displays the Receiver Selectivity spectral diagram as shown in Fig. 4-11 below. Fig.
Page 104 APPLICATIONS Fig. 4-13 Receiver selectivity − receiver modulation setup menu (9) When the A source is modulated press [Rx Mod’n ON/OFF] to toggle between the two states as shown by the screen. (10) If you want to apply modulation to the interferer (B source) press the [Interf Mod’n] key to access the Interferer Modulation Setup Menu shown in Fig.
Page 105 APPLICATIONS (17) At any time during the test you can press [Summary] then [Source Summary] to display the Source Summary screen similar to that shown in Fig. 4-15 below. This shows the allocated frequencies and levels of both sources to confirm your selection. Fig.
Page 106: Chapter 5 Remote Operation
Preparing the instrument for remote operation Introduction The 2026Q MultiSource Generator can be controlled remotely using either the RS-232 interface or the GPIB (General Purpose Interface Bus) interface. The command set used is designed to comply with IEEE 488.2. In RS-232 mode some IEEE 488.2 features are not implemented due to the restrictions of the interface.
Page 107 REMOTE OPERATION Remote operation selection Remote operation can be selected between RS-232 and GPIB as follows: (1) Press [UTIL] to display the Utilities Selection Menu 1 (if necessary, additionally press [Utils Menu 1]). (2) Press [Remote Control] to display the Remote Control Utility shown in Fig. 5-1 below. Fig.
Page 108 REMOTE OPERATION RS-232 operation RS-232 control port The connections required between the RS-232 serial port and the controlling device are described in Chapter 2 under ‘RS-232 interface’. Handshaking Software only All control lines are normally in the OFF state and are ignored. Flow control is achieved by XON/XOFF.
Page 109 (1) Press [GPIB Address] and enter the address which must be unique on the system to the instrument and within the range 0 to 30. GPIB functions The IEEE 488.1 interface functions offered by the 2026Q are as follows: Source handshake (SH1) complete capability.
Page 110 REMOTE OPERATION Device listening elements The following is a list of the device listening elements (as defined in the IEEE 488.2 standard) which are used in the instrument: <PROGRAM MESSAGE> <PROGRAM MESSAGE TERMINATOR> <PROGRAM MESSAGE UNIT> <PROGRAM MESSAGE UNIT SEPARATOR> <COMMAND MESSAGE UNIT>...
Page 111 REMOTE OPERATION 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 112 REMOTE OPERATION Program data Data can take many forms, as follows: Decimal Numeric Data is a flexible numeric format which encompasses integer, fixed point and floating point (mantissa and exponent) representations. Data is rounded to a resolution appropriate to the function. Decimal data can, in most cases, be followed by the appropriate units.
Page 113 <manufacturer>,<model>,<serial number>,<software part number and issue number>. where: <manufacturer> is IFR, <model> is the instrument model number, which is 2026Q. <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 114 REMOTE OPERATION Device-dependent commands The following list describes the features of the device-dependent mnemonics for the instrument together with simple examples of their use within each major section (Carrier frequency, RF level, etc.) The root mnemonic is listed first followed by the lower level mnemonics. Each group is followed by a list of requirements for data type and suffix.
Page 115 REMOTE OPERATION Source selection SOURCE Select RF Source A or B as current source. When a source is selected, the source-specific commands and queries will then apply to that source. Data type : Character Program Data (A or B) Allowed suffices : None Default suffix : None...
Page 116 REMOTE OPERATION COUPLING:CFRQAB: (continued) :SUBHARM Set Sub-harmonic for carrier frequency coupling relationship Data type : Decimal Numeric Program Data Allowed suffices : None Default suffix : None :OFFSET Set Frequency Offset for carrier frequency coupling relationship Data type : Decimal Numeric Program Data Allowed suffices : Any one of: GHZ, MHZ, KHZ or HZ Default suffix :...
Page 117 REMOTE OPERATION Carrier frequency (source-specific) CFRQ Set Carrier Frequency (short form) :VALUE Set Carrier Frequency :INC Set Carrier Frequency step Data type : Decimal Numeric Program Data Allowed suffices : Any one of: GHZ, MHZ, KHZ or HZ Default suffix : Go UP one step Go DOWN one step :RETN...
Page 118 REMOTE OPERATION RF level (source-specific) RFLV Set RF Output Level (short form) :VALUE Set RF Output Level Data type : Decimal Numeric Program Data Allowed suffices : Any one of: DBM, DBV, DBMV, DBUV, V, MV, UV OR NV. Default suffix : DBM unless changed by UNITS command :INC Set RF Level step (dB)
Page 119 REMOTE OPERATION Modulation mode (source-specific) MODE Set modulation mode Data type : Character Program Data (valid combinations of AM, FM, PM, FSK2L, FSK4L or PULSE. See table below.) Allowed suffices : None Default suffix : None Examples: MODE AM,FM MODE FM,PULSE VALID MODE COMBINATIONS TABLE AM [,PULSE] FM [,PULSE]...
Page 120 REMOTE OPERATION Frequency modulation (and FSK) (source-specific) FM or FM1 or FM2 Set FM Deviation (short form) :DEVN Set FM Deviation :INC Set FM step size Data type : Decimal Numeric Program Data Allowed suffices : Any one of: GHZ, MHZ, KHZ or HZ Default suffix : :<src>...
Page 121 REMOTE OPERATION DCFMNL Perform DC FM null operation Data type : None Allowed suffices : None Default suffix : None Example: DCFMNL Prepares message containing information on FM setting in one of the FM? or FM1? or FM2? following formats: :FM:DEVN <nr2>;<src>;<status>;INC <nr2>...
Page 122 REMOTE OPERATION Phase modulation (source-specific) PM or PM1 or PM2 Set Phase Modulation Deviation (short form) :DEVN Set Phase Modulation Deviation Set Phase Modulation step size :INC Data type : Decimal Numeric Program Data Allowed suffices : Default suffix : :<src>...
Page 123 REMOTE OPERATION PM:MODF? or PM1:MODF? Prepares message containing information on PM modulation oscillator setting or PM2:MODF? in one of the following formats: :PM:MODF:VALUE <nr2>;<shape>;INC <nr2> :PM1:MODF:VALUE <nr2>;<shape>;INC <nr2> :PM2:MODF:VALUE <nr2>;<shape>;INC <nr2> where: <shape> is a program mnemonic representing the waveform shape Example: :PM2:MODF:VALUE 2500.00;TRI;INC 500.00...
Page 124 REMOTE OPERATION Amplitude modulation (source-specific) AM or AM1 or AM2 Set AM Depth (short form) Set AM Depth :DEPTH Set AM step size :INC Data type : Decimal Numeric Program Data Allowed suffices : Default suffix : :<src> Select modulation source where <src> is any one of: INT, EXTAC, EXTALC, or EXTDC Turn AM ON (locally) Turn AM OFF (locally)
Page 125 REMOTE OPERATION 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 126 REMOTE OPERATION Pulse modulation (source-specific) PULSE [not used alone] Turn Pulse modulation ON Turn Pulse modulation OFF :OFF Data type : None Allowed suffices : None Default suffix : None Examples: PULSE:ON PULSE:OFF Prepares message containing information on Pulse Modulation setting in the PULSE? following format: :PULSE:<status>...
Page 127: Memory
REMOTE OPERATION Memory − − − − store [not used alone] Carrier Freq Store 0−99 :CFRQ Full Store 0−99 :FULL RAM Store 0−99 :RAM Data type : Decimal Numeric Program Data Allowed suffices : None Default suffix : None Examples: STO:FULL 45 STO:CFRQ 16 Memory −...
Page 128 REMOTE OPERATION Memory − − − − protection MPROT [not used alone] [not used alone] :CFRQ Set the start of the Carrier Freq Stores memory block which is to be :START protected/unprotected. Set the end of the Carrier Freq Stores memory block which is to be :STOP protected/unprotected.
Page 129 REMOTE OPERATION Sweep operation SWEEP [not used alone] :CFRQ Optional command (may be omitted) :START Set Start Frequency :STOP Set Stop Frequency :INC Set Carrier Frequency sweep step size Data type : Decimal Numeric Program Data Allowed suffices : Any one of: GHZ, MHZ, KHZ or HZ Default suffix : :TIME Select time per sweep step...
Page 130 REMOTE OPERATION SWEEP? Prepares message containing information on Sweep Source, Mode and Trigger in the following format: :SWEEP:SOURCE <source>;MODE <mode>;TRIG <trig> where: <source> is character program data indicating the sweep source selection, <mode> is character program data indicating the sweep mode selected, and <trig> is character program data indicating the trigger type selected.
Page 131 REMOTE OPERATION Miscellaneous commands (source-specific) Reset reverse power protection trip (short form) :RESET Reset RPP trip for current source. Data type : None Allowed suffices : None Default suffix : None Example: RPP:RESET RPP:TRIPPED? Prepares message containing information on whether the RPP Circuitry of the current source is currently tripped in the following format: <nr1>...
Page 132 REMOTE OPERATION Miscellaneous commands (not source-specific) ERROR? Prepares message relating to the next error in the error queue in the following format: <nr1>, <string> Where <string> is a descriptive error message. The numeric value returned is that of the next error number, or 0 if the queue is empty, or 399 if the queue is full.
Page 133 REMOTE OPERATION BLANK? Prepares message containing information on the display blanking setting in the following format: :BLANK:<state> where: <state> is program mnemonic indicating whether the blanking is ON or OFF Example: BLANK:OFF Sets the LCD contrast, over a scale of 0 to 31. CONTRAST Data type : Decimal Numeric Program Data...
Page 134 REMOTE OPERATION :MODE Select the power up mode. The instrument can power up in either the factory preset mode or from a full store. Data type : Character program data (FACTORY or MEMORY) Allowed suffices : None Default suffix : None :FULL Set the FULL store memory location for a memory power up.
Page 135 Event Summary Bit (<esb>), the Summary Message from the Standard Event Status Register. In 2026Q, bit 7 is a Queue Summary for the Error Queue. Bits 1, 2, and 3 are Status summaries for the Instrument Status, Coupling Status and Hardware Status Registers. Bit 0 is unused.
Page 136 Event Register. Either positive-going, negative-going or both transitions can set bits in an Event Register. But in the 2026Q the Transition Filters are preset as either Positive or Negative, as described in the following pages.
Page 137: Operation
REMOTE OPERATION 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> <urq> <cme> <exe> <dde>...
Page 138 REMOTE OPERATION Hardware event registers These are device-dependent registers and the bits have meanings as shown in the list at the bottom of the page. Each source (A and B) has its own set of registers, from which its respective hardware event register summary bits are jointly summarized in the Status Byte.
Page 139 REMOTE OPERATION Coupling event registers These are device-dependent registers and the bits have meanings as shown in the list at the bottom of the page. Each source (A and B) has its own set of registers, from which its respective coupling event register summary bits are jointly summarized in the Status Byte.
Page 140 REMOTE OPERATION Instrument event registers These are device-dependent registers and the bits have meanings as shown in the list at the bottom of the page. Each source (A and B) has its own set of registers, from which its respective instrument event register summary bits are jointly summarized in the Status Byte.
Page 141 REMOTE OPERATION Queue flag details The <mav> status bit is set when one or more bytes are available to be read from the Output Queue. The <erb> status bit is set when one or more errors are present in the Error Queue. The ERROR? query will place a nr1 response message in the Output Queue representing the Error at the head of the queue.
Page 142 REMOTE OPERATION Status byte when read by *stb? Status Byte Register Register Read Command <mav> <hsb> <csb> <ssb> <erb> <mss> <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 143 REMOTE OPERATION Status byte when read by serial poll Status Byte Register <mav> <hsb> <csb> <ssb> <erb> <mss> <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 144 REMOTE OPERATION 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 145: Chapter 6 Brief Technical Description
The display contrast can be adjusted. Control The 2026Q is a menu-driven instrument. Main menus are displayed by the use of hard keys, and parameters are changed by means of soft keys which change as the menu changes. Internal control of the instrument is achieved by a microprocessor which receives data from the various controls and sends instructions via an internal 8-bit data bus to the signal processing circuits.
Page 146 GPIB 1 CPU/ FRAC GPIB RS232 SOURCE SOURCE SYNTH 5MHz 10MHz 10 MHz VCXO DISPLAY OCXO LOOP SELECT INTERFACE EXT STD INT STD 10 MHz 10 MHz C4367 Fig. 6-1 Block diagram of 2026Q (with the A source shown in detail).
Page 147: Chapter 7 Acceptance Testing
Chapter 7 ACCEPTANCE TESTING Introduction The test procedures in this chapter enable you to verify that the electrical performance of the signal generator complies with the specifications 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 148 Tektronix TAS 465 † IFR Ltd was previously known as Marconi Instruments Ltd * Option 037 is necessary to measure SSB phase noise. # If the receiver and down converter are not available, an alternative procedure to ensure attenuator pad accuracy using a power meter is given.
Page 149: Test Procedures
(for output levels less than −5 dBm) Test equipment Description Minimum specification Example Power meter IFR 6960B with ±0.1 dB from 10 kHz to 2.4 GHz 6912 and 6932 Power Sensors Measuring HP 8902A with 0 dBm to −127 dBm; 2.5 MHz to 2.4 GHz...
Page 150: Output
ACCEPTANCE TESTING RF level frequency response Test procedure 6960B RF Power Meter SENSOR OUTPUT INPUT 6912 or 6932 Power Sensor C3491 Fig. 7-1 RF output test set-up Perform AUTO ZERO and AUTO CAL on the power meter. Connect the test equipment as shown in Fig. 7-1. On the UUT set source A to: [Carr Freq] 30 [kHz]...
Page 151 ACCEPTANCE TESTING Test procedure 2041 Signal Generator OUTPUT OUTPUT Down convertor Frequency offset Sensor mode connection Measuring receiver C3493 Fig. 7-2 Attenuator accuracy test set-up Connect the test equipment as shown in Fig. 7-2. On the UUT set source A to: [Carr Freq] 2.6 [MHz] [RF Level]...
Page 152 ACCEPTANCE TESTING Alternative attenuator functional test A 50 Ω termination should be fitted to OUTPUT TO RADIO TEST SET and the chained termination fitted on the rear panel INPUT FROM RADIO TEST SET before conducting these tests. Connect the test equipment as shown in Fig.
Page 153 (typically <1.25:1). Test equipment Description Minimum specification Example Power meter IFR 6960B and ±0.1 dB from 10 kHz to 2.4 GHz 6920 RF level frequency response Test procedure Perform AUTO ZERO and AUTO CAL on the power meter. Connect the test equipment as shown in Fig.
Page 154 +19 dBm. (matched) Reverse isolation >40 dB. Test equipment Description Minimum specification Example Power meter IFR 6960B −40 dBm to −20 dBm Power sensor −40 dBm to −20 dBm IFR 6920 Calibrated 30 dB (for power meter cal’) attenuator pad Calibrated 50 Ω...
Page 155 ACCEPTANCE TESTING CONNECTION TO RADIO to OUTPUT TO RADIO TEST SET path loss Specification Maximum reverse power 2 W (+33 dBm). Path loss from radio <−13.5 dB typical. Test equipment As above. (1) Reconnect the chained 50 Ω termination to INPUT FROM RADIO TEST SET on the rear panel.
Page 156 Test equipment Description Minimum specification Example Frequency 10 kHz to 2.4 GHz EIP 535B or counter IFR 2440 50 Ω load 1 W, 50 Ω nominal impedance, DC to 2.4 GHz Lucas Weinschel M1404N (termination) Test procedure 2440 Frequency Counter...
Page 157: Spectral Purity
Minimum specification Example Spectrum DC to 7.2 GHz frequency coverage Anritsu MS2602A analyzer or IFR 2386 Measuring 0 dBm to −127 dBm; 2.5 MHz to 2.4 GHz Capable HP 8902A with receiver Option 037 of measuring residual FM less than 2 Hz and SSB phase noise <−124 dBc/Hz at 20 kHz offset from a...
Page 158 ACCEPTANCE TESTING On the UUT set source A to: [Carr Freq] 10 [kHz] −4 [dB] [RF Level] Measure the level of the second and third harmonics on the spectrum analyzer at each of the carrier frequencies shown in Table 7-18 checking that the results are within specification.
Page 159 ACCEPTANCE TESTING SSB phase noise Test procedure 2041 Signal Generator OUTPUT OUTPUT Measuring receiver C3499 Fig. 7-6 SSB phase noise test set-up Connect the test equipment as shown in Fig. 7-6. On the UUT set source A to: [Carr Freq] 470 [MHz] [RF Level] 0 [dB]...
Page 160 ACCEPTANCE TESTING RF leakage Test procedure 2386/2380 Spectrum Analyzer and Display Initial connection Terminate with load INPUT Two turn loop 25 mm diameter C4670 Fig. 7-7 RF leakage test set-up Press PRESET then CAL on the spectrum analyzer. Connect the test equipment as shown in Fig. 7-7. On the UUT set source A to: [Carr Freq] 469.03 [MHz]...
Page 161 ACCEPTANCE TESTING CONNECTION TO RADIO output Specification Harmonics: Typically better than −30 dBc for RF levels up to −36 dBm. −25 dBc for RF levels up to −13 dBm. Isolation: Isolation between any non-selected individual output and the combined output is better than −60 dB, Isolation between any two individual outputs is better than −80 dBm, Isolation between the combined output and any individual output while selected is better than −35 dBm.
Page 162 ACCEPTANCE TESTING Isolation Test procedure This procedure tests the isolation between any individual output set to 0 dBm and the combined output. The other areas of the isolation specification are tested implicitly by this procedure. Connect the test equipment as shown in Fig. 7-4 with the spectrum analyzer connected to the combined RF output.
Page 163 Accepts logic level inputs (1 or 2) to produce an unfiltered FSK modulated output Test equipment Description Minimum specification Example Modulation meter IFR 2305 with FM accuracy ±1% at 1 kHz modulation frequency Distortion Option DC voltage measurement Solartron 7150+ Lucas Weinschel 50 Ω load 1 W, 50 Ω...
Page 164 ACCEPTANCE TESTING FM deviation and distortion Test procedure 2305 Modulation Meter OUTPUT INPUT C3488 Fig. 7-8 Internal modulation and modulation distortion test set-up Connect the test equipment as shown in Fig. 7-8. On the UUT set source A to: [Carr Freq] 10 [MHz] [RF Level] 0 [dB]...
Page 165 ACCEPTANCE TESTING Carrier error Test procedure Connect the test equipment as shown in Fig. 7-8. On the UUT set source A to: [Carr Freq] 1200 [MHz] [RF Level] 0 [dB] On the modulation meter select CARRIER ERROR. The FREQUENCY display will read 0.00 kHz.
Page 166 ACCEPTANCE TESTING External FM frequency response (ALC off, DC coupled) Test procedure 2305 Modulation Meter Function Generator OUTPUT MOD I/O OUTPUT INPUT OUTPUT Temporary connection load Audio Analyzer INPUT C4671 Fig. 7-9 External modulation and modulation distortion test set-up 30 Hz to 100 kHz Connect the test equipment as shown in Fig.
Page 167 ACCEPTANCE TESTING 0 Hz (DC) Note than to measure the FM deviation at DC, it will be necessary to use the DC offset facility on the function generator proceeding as follows: 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 168 Less than 3% at 10 radians at 1 kHz modulation rate Test equipment Description Minimum specification Example Modulation meter IFR 2305 with ΦM and FM accuracy ±2% at 1 kHz modulation Distortion Option frequency Phase modulation Test procedure Connect the test equipment as shown in Fig.
Page 169 ACCEPTANCE TESTING Phase modulation flatness Test procedure For this test, the phase modulation figures are calculated from readings taken with the modulation meter set to FM. No allowances need to be made for the modulation source frequency accuracy since it is derived from the reference oscillator in the UUT. Connect the test equipment as shown in Fig.
Page 170 Test equipment Description Minimum specification Example Modulation meter AM accuracy ±1% at 1 kHz modulation frequency IFR 2305 with Distortion Option DC voltage measurement Solartron 7150+ Lucas Weinschel 50 Ω load 1 W, 50 Ω nominal impedance, DC to 2.4 GHz...
Page 171 ACCEPTANCE TESTING AM scale shape Test procedure Connect the test equipment as shown in Fig. 7-8. On the UUT set source A to: [Carr Freq] 100 [MHz] [RF Level] 0 [dB] [AM] [AM Depth] 1 [%] [AM ON/OFF] On the modulation meter, select CAL, AM, 300 Hz Þ 3.4 kHz LF filter. Measure the AM accuracy at the depths shown in Table 7-40, checking that the results are...
Page 172 ACCEPTANCE TESTING 0 Hz (DC) 6960B RF Power Meter Function Generator SENSOR OUTPUT MOD I/O OUTPUT INPUT Temporary 6912 Ω connection Power load Sensor C3490 Fig. 7-10 External AM and distortion test set-up To measure the AM depth at DC, it will be necessary to use the DC offset facility on the function generator, proceeding as follows: Connect the test equipment as shown in Fig.
Page 173 IFR 6960B and ±0.1 dB from 10 kHz to 2.4 GHz 6912 Spectrum Frequency coverage 32 MHz to 2.4 GHz IFR 2386 or 2383 analyzer 50 Ω load 1 W, 50 Ω nominal impedance, DC to 2.4 GHz Lucas Weinschel...
Page 174 ACCEPTANCE TESTING Record the output level measured by the power meter against each of the carrier frequencies shown in Table 7-43 checking that the results are within specification. Set the UUT RF level to +4 dBm and repeat (5) using Table 7-44.
Page 175 ACCEPTANCE TESTING Pulse modulation rise and fall time Function Oscilloscope Generator PULSE OUTPUT INPUT OUTPUT C3494 Fig. 7-13 Pulse modulation rise and fall time test set-up Test procedure Connect the test equipment as shown in Fig. 7-13. On the UUT set source A to: [Carr Freq] 50 [MHz] [RF Level]...
Page 176 2 V RMS EMF from a 600 Ω source impedance Test equipment Description Minimum specification Example Frequency 10 kHz to 2.4 GHz IFR 2440 counter Lucas Weinschel 50 Ω load 1 W, 50 Ω nominal impedance, DC to 2.4 GHz M1404N (termination) Audio analyzer Capable of measuring THD of 0.01% at 1 kHz...
Page 177 ACCEPTANCE TESTING Modulation oscillator distortion and LF output flatness Test procedure Audio Analyzer INPUT C4673 Fig. 7-15 Modulation oscillator distortion test set-up Connect the test equipment as shown in Fig. 7-15. On the UUT set source A to: [MOD ON/OFF] (To enable modulation source) [FM Mod Freq] 1 kHz Measure the distortion on the audio analyzer checking that the result is within the...
Page 178 ACCEPTANCE TESTING External frequency standard input Specification Input levels: Requires an input of 220 mV RMS to 1.8 V RMS into 1 kΩ Input frequencies: 1 MHz or 10 MHz Test equipment Description Minimum specification Example Signal generator 220 mV to 1.8 V RMS, 1 MHz to 10 MHz IFR2030 or 2040 series Test procedure...
Page 179: Acceptance Test Results Tables
ACCEPTANCE TESTING Acceptance test results tables For 2026Q signal generator, serial number _ _ _ _ _ _ / _ _ _ Table 7-1 RF output at −4 dBm Carrier frequency RF level min. Result (dBm) RF level max. (MHz)
Page 180 ACCEPTANCE TESTING Table 7-2 RF output at +6 dBm Carrier frequency RF level min. Result (dBm) RF level max. (MHz) (dBm) src A src B (dBm) 0.03 +5.2 ____ ____ +6.8 0.33 +5.2 ____ ____ +6.8 +5.2 ____ ____ +6.8 +5.2 ____ ____...
Page 181 ACCEPTANCE TESTING Table 7-3 RF output at +13 dBm Carrier frequency RF level min. Result (dBm) RF level max. (MHz) (dBm) src A src B (dBm) 0.03 ____ ____ 0.33 ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____...
Page 182 ACCEPTANCE TESTING Table 7-4 RF output at +24 dBm Carrier frequency RF level min. Result (dBm) RF level max. (MHz) (dBm) src A src B (dBm) 0.03 ____ ____ 0.33 ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____...
Page 183 ACCEPTANCE TESTING Table 7-5 ALC linearity at 2.5 MHz RF level (dBm) RF level min. Result (dBm) RF level max. (dBm) src A src B (dBm) −4 −4.8 ____ ____ −3.2 ____ ____ −3 −3.8 −2.2 ____ ____ −2 −2.8 −1.2 −1 −1.8...
Page 184 ACCEPTANCE TESTING Table 7-6 ALC linearity at 500 MHz RF level (dBm) RF level min. Result (dBm) RF level (dBm) src A src B max. (dBm) −4 −4.8 ____ ____ −3.2 ____ ____ −3 −3.8 −2.2 ____ ____ −2 −2.8 −1.2 −1 −1.8...
Page 185 ACCEPTANCE TESTING Table 7-7 ALC linearity at 2400 MHz RF level (dBm) RF level min. Result (dBm) RF level max. (dBm) src A src B (dBm) −4 −5.6 ____ ____ −2.4 ____ ____ −3 −4.6 −1.4 ____ ____ −2 −3.6 −0.4 −1 −2.6...
Page 186 ACCEPTANCE TESTING Table 7-8 Attenuator test at 2.6 MHz RF level (dBm) RF level min. Result (dBm) RF level max. (dBm) src A src B (dBm) −0.8 ____ ____ +0.8 ____ ____ −4.1 −4.9 −3.3 −15.1 −15.9 ____ ____ −14.3 ____ ____ −26.1...
Page 187 ACCEPTANCE TESTING Table 7-10 Attenuator test at 1140 MHz RF level (dBm) RF level min. Result (dBm) RF level max. (dBm) src A src B (dBm) −0.8 ____ ____ +0.8 ____ ____ −4.1 −4.9 −3.3 −15.1 −15.9 ____ ____ −14.3 ____ ____ −26.1...
Page 188 ACCEPTANCE TESTING Table 7-12 Attenuator test at 2400 MHz RF level (dBm) RF level min. Result (dBm) RF level max. (dBm) src A src B (dBm) −1.6 ____ ____ +1.6 ____ ____ −4.1 −5.7 −2.5 −15.1 −16.7 ____ ____ −13.5 ____ ____ −26.1...
Page 189 ACCEPTANCE TESTING Table 7-15 CONNECTION TO RADIO output at −35 dBm Carrier frequency RF level min. Result (dBm) using RF level max. (MHz) (dBm) source A source B (dBm) ____ ____ −35.75 −34.25 −35.75 ____ ____ −34.25 ____ ____ −35.75 −34.25 1930 −35.75...
Page 190 ACCEPTANCE TESTING Table 7-17 Carrier frequency tests Frequency (MHz) Frequency min. Result (MHz) Frequency max. (MHz) src A src B (MHz) 0.01 − ____ ____ − ____ ____ − − 9.999999 ____ ____ − − 18.75 − ____ ____ − 37.5 ____ ____...
Page 191 ACCEPTANCE TESTING Table 7-18 Carrier harmonic tests at −4 dBm 2nd harmonic 3rd harmonic Carrier typically Result (dBc) typically Result (dBc) frequency (MHz) <(dBc) src A src B <(dBc) src A src B 0.01 ____ ____ ____ ____ −30 −30 −30 ____ ____...
Page 192 ACCEPTANCE TESTING Table 7-19 Carrier harmonic tests at 0 dBm 2nd harmonic 3rd harmonic Carrier typically Result (dBc) typically Result (dBc) frequency (MHz) <(dBc) src A src B <(dBc) src A src B 0.01 −30 ____ ____ −30 ____ ____ ____ ____ ____...
Page 193 ACCEPTANCE TESTING Table 7-20 Carrier harmonic tests at +7 dBm 2nd harmonic 3rd harmonic Carrier typically Result (dBc) typically Result (dBc) frequency (MHz) <(dBc) src A src B <(dBc) src A src B 0.01 −25 ____ ____ −25 ____ ____ ____ ____ ____...
Page 194 ACCEPTANCE TESTING Table 7-21 Carrier harmonic tests at +18 dBm 2nd harmonic 3rd harmonic Carrier typically Result (dBc) typically Result (dBc) frequency (MHz) <(dBc) src A src B <(dBc) src A src B 0.01 −25 ____ ____ −25 ____ ____ ____ ____ ____...
Page 195 ACCEPTANCE TESTING Table 7-22 Carrier non-harmonic tests Sub-harmonic output Sub-harmonic output Carrier Non- Non- Non- Non- frequency harmonic harmonic harmonic harmonic (MHz) frequency level Result (dBc) frequency level Result (dBc) (MHz) (dBc) src A src B (MHz) (dBc) src A src B 1201 800.6667 −64...
Page 196 ACCEPTANCE TESTING Table 7-25 RF leakage test Carrier frequency Measured value (MHz) RF leakage (dBm) src A src B <0.5 µV ____ ____ ____ ____ <0.5 µV 1349 <0.5 µV ____ ____ 2399 ____ ____ <0.5 µV Table 7-26 Sources A/B intermod test RF level Source A Source B...
Page 197 ACCEPTANCE TESTING Table 7-27 Isolation tests Frequency Isolation (MHz) level (dBm) Src B Src A −60 _____ _____ 1200 _____ _____ −60 1600 −60 _____ _____ Table 7-28 Internal FM deviation and distortion tests at 100 kHz deviation FM Deviation Distortion Carrier frequency...
Page 198 ACCEPTANCE TESTING Table 7-29 FM scale shape tests at 15 MHz carrier FM deviation Result (kHz) FM deviation FM deviation (kHz) min. (kHz) src A src B max. (kHz) ____ ____ 67.45 ____ ____ 74.55 53.2 ____ ____ 58.8 41.8 ____ ____ 46.2...
Page 199 ACCEPTANCE TESTING Table 7-32 External FM frequency response (ALC on), 10 kHz deviation, 0.75 V input Response Response Modulation level min. Result (dB) level max. frequency (kHz) (dB) src A src B (dB) 0.02 ____ ____ −1 ____ ____ −1 −1 ____ ____...
Page 200: Modulation
ACCEPTANCE TESTING Table 7-35 Internal ΦM flatness test Response Response Modulation level min. Result (dB) level max. frequency (kHz) (dB) src A src B (dB) −3 ____ ____ ____ ____ −3 reference − − −3 ____ ____ ____ ____ −3 Table 7-36 Internal AM depth and distortion tests at -4 dBm AM depth 30% AM depth 80%...
Page 201 ACCEPTANCE TESTING Table 7-37 Internal AM depth and distortion tests at 0 dBm AM depth 30% AM depth 80% Distortion Result at 30% Result at 80% Carr. depth depth freq. min. Result (%) max. min. Result (%) max. (<1.5%) (<2.5%) (MHz) src A src B src A src B...
Page 202 ACCEPTANCE TESTING Table 7-39 Internal AM depth and distortion tests at +10 dBm AM depth 30% AM depth 80% Distortion Result at 30% Result at 80% Carr. depth depth freq. min. Result (%) max. min. Result (%) max. (<1.5%) (<2.5%) (MHz) src A src B src A src B...
Page 203 ACCEPTANCE TESTING Table 7-41 External AM frequency response (ALC off, DC coupled), RF level −4 dBm Modulation Response Result (dB) Response level frequency (kHz) level min. (dB) src A src B max. (dB) ____ ____ −1 −1 ____ ____ ____ ____ −1 reference...
Page 204 ACCEPTANCE TESTING Table 7-43 Pulse mod. RF output at −7 dBm Carrier frequency RF level min. Result (dBm) RF level max. (MHz) (dBm) src A src B (dBm) ____ ____ +5.7 −8.3 −8.3 ____ ____ +5.7 −8.3 ____ ____ +5.7 ____ ____ +5.7...
Page 205 ACCEPTANCE TESTING Table 7-44 Pulse mod. RF output at +4 dBm Carrier frequency RF level min. Result (dBm) RF level max. (MHz) (dBm) src A src B (dBm) +2.7 ____ ____ +5.3 +2.7 ____ ____ +5.3 +2.7 ____ ____ +5.3 +2.7 ____ ____...
Page 206 ACCEPTANCE TESTING Table 7-45 Pulse modulation on/off ratio test Carrier frequency Pulse mod. on/off Measured value (dB) (MHz) ratio (dB) src A src B >45 ____ ____ >45 ____ ____ >45 ____ ____ 1000 >45 ____ ____ 1200 >45 ____ ____ 1500 >40...
Page 207 ACCEPTANCE TESTING Table 7-48 Modulation oscillator distortion and LF output tests Response Response Mod. oscillator level min. Result level max. Distortion (%) Result (%) frequency (Hz) (dB) src A src B (dB) src A src B −1 ____ ____ − −...
Page 208: Index
INDEX Fuses..............2-6 About this manual............ ii Acceptance testing..........7-1 Amplifier intermodulation distortion application . 4-6 General purpose interface bus (GPIB) ....2-6 Amplitude modulation selection ......3-21 GoodS-in checks........... 2-6 Amplitude modulation test........7-24 GPIB mnemonics Applications............4-5 ............5-8, 5-39 *CLS Associated publications ...........
Page 209 INDEX GPIB mnemonics (continued) Latch access utility ..........3-42 HCR? .............5-33, 5-39 Local lockout............5-1 HSE ..............5-33 HSE?............5-33, 5-39 HSR? .............5-33, 5-39 Main features............1-2 HSRM?............5-33 Memory protection ..........3-46 IMPEDANCE..........5-27 Memory recall ............ 3-47 IMPEDANCE? ..........5-27 Memory stores............
Page 210 INDEX Using the control knob ........3-10 Ventilation............2-2 Using the steps keys..........3-11 Versions, options and accessories ...... 1-10 Utilities ............... 3-27 Index-3...
Page 211 AEROFLEX INTERNATIONAL LTD. SOFTWARE LICENCE AND WARRANTY This document is an Agreement between the user of this Licensed Software, the Licensee, and Aeroflex International Limited, the Licensor. By opening this Software package or commencing to use the software you accept the terms of this Agreement. If you do not agree to the terms of this Agreement please return the Software package unopened to Aeroflex International Limited or do not use the software.
Page 212 AEROFLEX INTERNATIONAL LTD SOFTWARE LICENCE AND WARRANTY The above Warranty does not apply to: 6.1 Defects resulting from software not supplied by Aeroflex, from unauthorised modification or misuse or from operation outside of the specification. 6.2 Third party produced Proprietary Software which Aeroflex may deliver with its products, in such case the third party Software Licence Agreement including its warranty terms shall apply.
Page 213 CHINA Beijing KOREA Tel: [+86] (10) 6539 1166 Tel: [+82] (2) 3424 2719 Fax: [+86] (10) 6539 1778 Fax: [+82] (2) 3424 8620 CHINA Shanghai SCANDINAVIA Tel: [+86] (21) 5109 5128 Tel: [+45] 9614 0045 Fax: [+86] (21) 5150 6112 Fax: [+45] 9614 0047 FINLAND SPAIN...

IFR 2026Q Operating Manual

Table of Contents

Chapter 1 General Information

Chapter 2 Installation

Chapter 1 GENERAL INFORMATION

Chapter 3 LOCAL OPERATION

Chapter 4 SETUP

Chapter 5 REMOTE OPERATION

Chapter 6 BRIEF TECHNICAL DESCRIPTION

Chapter 7 ACCEPTANCE TESTING

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