Rohde & Schwarz ABFS Operating Manual
Rohde & Schwarz ABFS Operating Manual

Rohde & Schwarz ABFS Operating Manual

Baseband fading simulator
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Summary of Contents for Rohde & Schwarz ABFS

  • Page 1 T h e t e s t & me a s u r e me n t e q u i p me n t y o u n e e d a t t h e p r i c e y o u w a n t . A l l t e s t I n s t r u me n t s , I n c .
  • Page 2 Test and Measurement Division Operating Manual Baseband Fading Simulator ABFS 1114.8506.02 Printed in the Federal Republic of Germany 1114.8564.12-02...
  • Page 4 Supplement to Operating Manual Baseband Fading Simulator ABFS Dear Customer, Your Baseband Fading Simulator is equipped with a new firmware version. The new firmware offers the following extensions and improvements: FSIM - FINE DELAY menu: RF FREQUENCY CH1 Input value of RF frequency of channel 1.
  • Page 6 ABFS Tabbed Divider Overview Tabbed Divider Overview Contents Data Sheet Safety Instructions Certificate of Quality EC Certificate of Conformity List of R&S Representatives General Overview of Manuals Divider Chapter 1 Preparation for Use Chapter 2 Introduction to Operation Chapter 3...
  • Page 8 • In birth-death mode, there are two paths changing delay in steps in accordance with the 3GPP channel model. Specifications The enhanced fading functions for WCDMA 3GPP are only available for the ABFS standard fading simulator, not for the second fading simulator (option ABFS-B2). Modes...
  • Page 10: Table Of Contents

    Elements of the Front Panel ....................1.5 Elements of the Rear Panel....................1.13 2 Brief Introduction ....................2.1 Connection of ABFS ........................2.1 Sample Settings for First-Time Users.................... 2.2 3 Manual Operation ....................3.1 Design of the Display ........................3.1 Basic Operating Steps........................
  • Page 11 FINE DELAY Menu........................ 4.10 MOVING DELAY Menu ......................4.12 BIRTH-DEATH Menu ......................4.14 Noise Generator ..........................4.16 MODE Menu With Built-in Noise Generators Option ABFS-B1 / Option ABFS-B3 ....4.17 AWGN Menu ......................... 4.19 Calibration ............................4.20 CALIBRATE Menu......................... 4.20 Memory Sequence .........................
  • Page 12 ABFS Contents Messages............................5.5 Interface Messages ......................... 5.5 Device Messages (Commands and Device Responses) ............5.5 Structure and Syntax of Device Messages ................... 5.6 Introduction to SCPI......................... 5.6 Structure of Commands ......................5.6 Structure of Command Lines....................5.9 Responses to Queries ......................5.9 Parameters ..........................
  • Page 13 Service Request ..........................7.4 8 Maintenance......................8.1 Cleaning the Outside ........................8.1 Storing and Packing ........................8.1 9 Error Messages ....................9.1 List of Error Messages ........................9.2 SCPI-Specific Error Messages ....................9.2 ABFS- Specific Error Messages ....................9.6 10Index ........................10.1 1114.8564.12...
  • Page 14 ABFS Contents Tables Table 4-1 Possible combinations of options with basic ABFS unit ..........4.17 Table 4-2 Memory sequence; example of a list................4.21 Table 5-1 Synchronization by means of *OPC, *OPC? and *WAI..........5.15 Table 5-2 Meaning of the bits used in the status byte ..............5.19 Table 5-3 Meaning of the bits used in the event status register ...........5.20...
  • Page 15 MODE submenu with built-in option ABFS-B2 ..............4.3 Fig. 4-4 FSIM selection menu with option B49 (option ABFS-B2 not installed)....... 4.4 Fig. 4-5 FSIM menu (without ABFS-B49 and without ABFS-B2) / STANDARD FAD menu (with ABFS-B49) ......................... 4.5 Fig. 4-6 Doppler frequency shift with moving receiver..............4.8 Fig.
  • Page 16 ABFS Contents Fig. 4-27 UTILITIES - DIAG – TPOINT menu ................. 4.36 Fig. 4-28 UTILITIES - DIAG – PARAM menu.................. 4.37 Fig. 4-29 UTILITIES – TEST menu ....................4.38 Fig. 4-30 UTILITIES – TRIGGER menu ..................4.39 Fig. 4-31 UTILITIES – BEEPER menu .................... 4.40 Fig.
  • Page 18 Before putting the product into operation for the first time, make sure to read the following S a f e t y I n s t r u c t i o n s Rohde & Schwarz makes every effort to keep the safety standard of its products up to date and to offer its customers the highest possible degree of safety.
  • Page 19 Safety Instructions Observing the safety instructions will help prevent personal injury or damage of any kind caused by dangerous situations. Therefore, carefully read through and adhere to the following safety instructions before putting the product into operation. It is also absolutely essential to observe the additional safety instructions on personal safety that appear in other parts of the documentation.
  • Page 20 Safety Instructions 4. If products/components are mechanically 10. Intentionally breaking the protective earth and/or thermically processed in a manner connection either in the feed line or in the that goes beyond their intended use, product itself is not permitted. Doing so can hazardous substances (heavy-metal dust result in the danger of an electric shock such as lead, beryllium, nickel) may be...
  • Page 21 Safety Instructions 19. If a product is to be permanently installed, matching Rohde & Schwarz type (see the connection between the PE terminal on spare parts list). Batteries and storage site and the product's PE conductor must batteries are hazardous waste. Dispose of be made first before any other connection them only in specially marked containers.
  • Page 22 Por favor lea imprescindiblemente antes de la primera puesta en funcionamiento las siguientes informaciones de seguridad Informaciones de seguridad Es el principio de Rohde & Schwarz de tener a sus productos siempre al día con los estandards de seguridad y de ofrecer a sus clientes el máximo grado de seguridad. Nuestros productos y todos los equipos adicionales son siempre fabricados y examinados según las normas de seguridad vigentes.
  • Page 23 Informaciones de seguridad Tener en cuenta las informaciones de seguridad sirve para tratar de evitar daños y peligros de toda clase. Es necesario de que se lean las siguientes informaciones de seguridad concienzudamente y se tengan en cuenta debidamente antes de la puesta en funcionamiento del producto. También deberán ser tenidas en cuenta las informaciones para la protección de personas que encontrarán en otro capítulo de esta documentación y que también son obligatorias de seguir.
  • Page 24 Informaciones de seguridad seguridad (control a primera vista, control de peligro a causa de la radiación conductor protector, medición de resistencia electromagnética. El empresario está de aislamiento, medición de medición de la comprometido a valorar y señalar areas de corriente conductora, control trabajo en las que se corra un riesgo de...
  • Page 25 Informaciones de seguridad 12. No utilice nunca el producto si está dañado el 20. En caso de que los productos que son cable eléctrico. Asegure a través de las instalados fijamente en un lugar sean sin medidas de protección y de instalación protector implementado, autointerruptor o adecuadas de que el cable de eléctrico no similares objetos de protección, deberá...
  • Page 26 Informaciones de seguridad 27. Baterías y acumuladores no deben de ser 31. Las asas instaladas en los productos sirven expuestos a temperaturas altas o al fuego. solamente de ayuda para el manejo que Guardar baterías y acumuladores fuera del solamente está previsto para personas. Por alcance de los niños.
  • Page 28 EC Certificate of Conformity Certificate No.: 99037 This is to certify that: Equipment type Order No. Designation ABFS 1114.8506.02 Baseband Fading Simulator ABFS-B1 1115.0009.02 Option: Noise Generator ABFS-B2 1115.0309.02 Option: Second Fading Simulator ABFS-B3 1115.0609.02 Option: Second Noise Generator complies with the provisions of the Directive of the Council of the European Union on the...
  • Page 30 Operating Manual for Baseband Fading Simulator ABFS This operating manual provides you with all the information necessary for putting into operation, manual and remote control as well as repair of Baseband Fading Simulator ABFS and also contains specifications of the instrument and available options.
  • Page 32: Putting Into Operation

    Supply Voltage The ABFS can be operated at a.c. systems from 90 to 132 V and 180 to 265 V at system frequencies from 47 to 440 Hz. The power supply socket is situated at the rear of the instrument. The instrument automatically sets itself to the voltage applied within the permissible voltage ranges.
  • Page 33: Switching On/Off The Instrument

    Instrument Settings"). In addition, all data and/or lists the user enters himself, such as for list mode or memory sequence, are stored in the RAM. Further, all data of the calibrations running within the instrument in the ABFS are stored in the RAM (cf. Chapter 4, section "Calibration" and Service Manual - Instrument).
  • Page 34: Preset Setting

    Ensure free air inlet/outlet at the perforation of the side walls of the instrument in rack mounting. The ABFS can be mounted into a 19" rack by means of rack adapter ZZA-94 (stock no. 396.4905.00). The mounting instructions are attached to the adapter.
  • Page 35: Fig. 1-1 Front Panel View Abfs

    Front Panel ABFS Ï Fig. 1-1 Front panel view ABFS 1114.8564.12...
  • Page 36: Explanation Of Front And Rear Panel

    As an alternative to menu control, the parameter keys Chapter 3, MODE GRP A can be used to switch over ABFS operating modes and signal paths. A graphic with the associated signal MODE GRP B paths is displayed in the menu. Complete device settings may also be stored and called up.
  • Page 37 Front Panel ABFS Ï Fig. 1-1 Front panel view ABFS 1114.8564.12...
  • Page 38 ABFS Front Panel DATA INPUT Unit keys with enter function The unit keys terminate the input of values and specify See as well the multiplication factor for the respective basic unit. Chapter 3, dBµV The basic units are displayed next to the input field while numbers are entered.
  • Page 39 Front Panel ABFS Ï Fig. 1-1 Front panel view ABFS 1114.8564.12...
  • Page 40 ABFS Front Panel MENU/VARIATION Rotary knob The rotary knob moves the menu cursor over the See as well Chapter 3 positions of a menu level to choose from or varies the Section value of a parameter. The variation is either effected in "Basic Operating Steps"...
  • Page 41 Front Panel ABFS Ï Fig. 1-1 Front panel view ABFS 1114.8564.12 1.10...
  • Page 42 ABFS Front Panel BRIGHTNESS / CONTRAST Brightness and contrast of the display can be set using See as well Chapter 1, the rotary knobs. Section "Setting of Contrast Contrast and Brightness of the Display" Brightness QUICK SELECT QUICK SELECT ASSI G N...
  • Page 43: Fig. 1-2 Rear Panel View Abfs

    Rear Panel ABFS Fig. 1-2 Rear panel view ABFS 1114.8564.12 1.12...
  • Page 44: Elements Of The Rear Panel

    ABFS Rear Panel Elements of the Rear Panel GROUP A / GROUP B GROUP A GROUP A IN 1 OUT 1 GROUP B Baseband inputs and outputs. The active inputs and outputs are dis- IN 2 OUT 2 played, depending on the...
  • Page 45 Rear Panel ABFS Fig. 1-2 Rear panel view ABFS 1114.8564.12 1.14...
  • Page 46 ABFS Rear Panel HOP CONTROL 1 / HOP CONTROL 2 HOP CONTROL 1 See as well HOP CONTROL1 Chapter 4, HOP CONTROL 2 RS-232 HOP CONTROL interfaces. Transmission of a list index for Section HOP CONTROL2 selection of a HOP frequency for "HOP CONTROL“...
  • Page 48: Brief Introduction

    Connection of ABFS ABFS is a fading simulator that utilizes the complex baseband signals I and Q. It does not comprise any signal source. It is located between the IQ source and RF upconverter in the baseband signal path (see Fig.
  • Page 49: Sample Settings For First-Time Users

    "GSM TYPICAL URBAN 12 Path“ fading standard, RF carrier frequency = 904.5 MHz First, the signal source (INPUT) and the upconverter (OUTPUT) are connected to ABFS. GROUP B connectors are available only if option ABFS-B2 (second fading group) has been fitted.
  • Page 50: Fig. 2-3 Display For Setting The Fading Mode

    ABFS Sample Settings for First-Time Users ILOSS A1 ILOSS A2 FSIM A-1CH/1IN/1OUT MODE FSIM CALIBRATE GROUP A MEM SEQ HOP CONTROL IQ_OUT1 IQ_IN1 UTILITIES FSIMA1 HELP FSIMA2 Fig. 2-3 Display for setting the fading mode Setting the fading parameters Operating steps...
  • Page 51 Sample Settings for First-Time Users ABFS Operating steps Explanations Select RF-FREQUENCY using the MENU / VARIATION MENU / VARIATION rollkey and press the SELECT key. SELECT RF FREQUENCY Enter an RF carrier frequency of DATA INPUT 904.5 MHz. The cursor returns to the FSIM menu.
  • Page 52: Fig. 2-4 Display For Setting Fading

    ABFS Sample Settings for First-Time Users 12.4 ILOSS A1 ILOSS A2 FSIM A-1CH/1IN/1OUT MODE STATE STOP RESET FSIM STANDARD... CALIBRATE MEM SEQ SPEED UNIT km/h SHOW PATH 1..6 7..12 HOP CONTROL INSERTION LOSS SETTING MODE AUTO UTILITIES HELP COUPLED PARAMETERS...
  • Page 54: Manual Operation

    Depending on the operating mode set, the header indicates the different insertion losses for the individual channels (ILOSS = Insertion Loss). With options ABFS-B1/ABFS-B3 fitted, it also indicates the set noise level (NLEV = Noise Level). (2) Status line The status line below describes operating mode and operating state of the instrument.
  • Page 55: Basic Operating Steps

    Basic Operating Steps ABFS Basic Operating Steps To operate the instrument, menus are called in the display. All setting possibilities and the current setting status are evident from the menus. All settings can be made by accessing the menus. Besides the menus, the keys [MODE GRP A] and [MODE GRP B] may also be used for making settings on the signal paths of GROUP A/B.
  • Page 56: Selection And Change Of Parameters

    ABFS Basic Operating Steps Selection and Change of Parameters À Set the menu cursor to the name of the parameter desired using the rotary Select parameter knob, e.g. to INSERTION LOSS MANUAL in the FSIM setting menu, see Fig. 3-2.
  • Page 57: Triggering Action

    The various operating modes or signal paths of the group are selected successively. After pressing the key, a window is opened in which the set ABFS signal paths are displayed in a graphic. The window is independent of the current menu control and menu hierarchy.
  • Page 58: Using Keys [Fading On/Off] And [Awgn On/Off]

    ABFS Basic Operating Steps Using Keys [FADING ON/OFF] and [AWGN ON/OFF] FADING and NOISE (AWGN Additive White Gaussian Noise) can be switched on and off not only in the menus but also by means of the keys [FADING ON / OFF] and [AWGN ON / OFF].
  • Page 59: List Editor

    ABFS List Editor The ABFS offers the facility of generating lists for automatic sequences of HOP mode and Memory Sequence. The lists consist of elements (pairs of values) which are defined by an index and at least one parameter per index. Each list is assigned a separate name and selected by means of this name. Access to the lists is made in the associated menus.
  • Page 60: Select And Generate - Select List

    ABFS List Editor SELECT LIST Opens a selection window in which a list can be selected from the existing lists or a new, empty list can be generated. In this line the active list is always displayed. DELETE LIST Opens a selection window in which the list to be deleted can be selected.
  • Page 61: Fig. 3-4 Select-List Selection Window

    List Editor ABFS Selection: SELECT LIST ILOSS A1 ILOSS A2 FSIM A-2CH/2IN/2OUT MODE AUTO SINGLE CREATE NEW LIST MODE FSIM MSEQ1 AWGN RESET SEQUENCE MSEQ2 CALIBRATE MSEQ3 CURRENT INDEX MSEQ4 MEM SEQ HOP CONTROL UTILITIES HELP SELECT LIST... DELETE LIST...
  • Page 62: Deletion Of Lists - Delete List

    ABFS List Editor Deletion of Lists - DELETE LIST DELETE LIST opens a selection window in which the list to be deleted can be selected. The lists are represented together with their name and their length. By pressing the [RETURN] key the selection window is exited without deleting a list.
  • Page 63: Edition Of Lists

    List Editor ABFS Edition of Lists Due to the selection of an edit mode on the OPERATION page the EDIT page is automatically activated. When the EDIT/VIEW function is selected, the largest possible section of the list is displayed (cf. Fig. 3-6). In the case of block functions FILL, INSERT and DELETE, an input window is additionally displayed (cf.
  • Page 64 ABFS List Editor À Mark the index associated to the parameter using the rotary knob or directly Select parameter enter the value of the index via the numeric keys. À Press [SELECT] key. Parameter MEMORY is marked. If the second parameter DWELL is to be marked, press the [SELECT] key again.
  • Page 65 List Editor ABFS FILL AT Setting the filling range. Lower limit (index) RANGE Number of the elements to be inserted PARAMETER Selection on which of the parameters the filling function is to have an effect. This menu option is eliminated if the list only includes elements with one parameter.
  • Page 66 ABFS List Editor Block function INSERT Function INSERT inserts desired number elements with constant linearly increasing/de-creasing values before the element with the given starting index. All elements which had been stored from the starting index are shifted to the end of the range to be inserted.
  • Page 67 List Editor ABFS Block function DELETE Function DELETE deletes the elements of the range indicated. This does not leave a gap in the list but the remaining elements move forward. If the given range exceeds the end of the list, deletion until the end of the list is effected.
  • Page 68: Save/Recall - Storing/Calling Of Instrument Settings

    ABFS SAVE/RECALL – Storing/Calling of Instrument Settings SAVE/RECALL – Storing/Calling of Instrument Settings 50 complete instrument settings can be stored in memory locations 1 to 50. Operating Steps Explanations DATA INPUT Store current instrument setting in memory location 12. SAVE...
  • Page 69: Menu Summary

    Menu Summary ABFS Menu Summary MODE GROUPA FSIM with OPTION ABFS-B2 FSIM GROUPB FSIM AWGN OPTION ABFS-B1, ABFS-B3 CALIBRATE MEM SEQ HOP CONTROL UTILITIES SYSTEM GPIB PROTECT RS232 LANGUAGE DIAG TEST CONFIG TRIGGER TPOINT PARAM BEEPER HELP 1114.8564.12 3.16...
  • Page 70: Device Functions

    FSIMA2 Fig. 4-1 Selection of operating modes in MODE submenu In its basic configuration, ABFS comprises two fading modules that form a group of 12 fading channels. The channels can be combined to form the following operating modes: 1CHANNEL/12PATH/ One fading channel with 12 paths.
  • Page 71: Fig. 4-2 Display Of Signal Paths In The Mode Submenu

    Fading Modes ABFS 2CHANNEL/6PATH/ Two fading channels with 6 paths each and a separate input and output per 2INPUT/2OUTPUT channel. IEC/IEEE-bus command :SOUR:FSIM:CONF DIDO Note: If option B49 is installed, this setting is not possible for the Moving Delay and Birth-Death operating modes !
  • Page 72: Fading With Option Abfs-B2

    MODE. The inputs and outputs are again shown graphically. Fig. 4-3 shows the MODE submenu of ABFS with built-in option ABFS-B2. The INSERTION LOSS for GROUP A is indicated on the left and the insertion loss for GROUP B on the right of the display.
  • Page 73: Fig. 4-4 Fsim Selection Menu With Option B49 (Option Abfs-B2 Not Installed)

    If option B49 is installed, 4 fading modes are available. These can be reached via the following selection menu: Fig. 4-4 FSIM selection menu with option B49 (option ABFS-B2 not installed) FSIM Choice of operating modes for the fading simulator.
  • Page 74: Fsim Menu (Without Option B49) /Standard Fad Menu (With Option B49)

    (with option ABFS-B2 installed). This menu is the same as the STANDARD FADING menu of option B49. Fig. 4-5 FSIM menu (without ABFS-B49 and without ABFS-B2) / STANDARD FAD menu (with ABFS-B49) STATE Activates the fading simulation by starting (RUN) the fading process.
  • Page 75 Fading Modes ABFS IGNORE RF When enabled, frequency changes less than 5 % are ignored. That permits CHANGES < 5% RF hopping faster than 3 ms. IEC/IEEE-bus command :SOUR:FSIM:IGN:RFCH ON STANDARD Opens a window for selecting a defined setting of fading paths The setting parameters correspond to the test regulations as stipulated in the mobile radio standards (eg GSM, CDMA, NADC).
  • Page 76 ABFS Fading Modes RF FREQUENCY Sets the RF frequency for selected channel. IEC/IEEE-bus command :SOUR:FSIM:CHAN1:RF 100MHz CHANNEL 1/ PATH Indicates the paths for subsequent parameters. These parameters can be CHANNEL 2/ PATH set individually for each path. STATE Switch-on/off of a path. If the cursor is placed onto a path, this path may be switched on or off by pressing one of the unit keys (toggle function).
  • Page 77: Fig. 4-6 Doppler Frequency Shift With Moving Receiver

    Fading Modes ABFS FREQ RATIO Entry value of ratio of actual Doppler frequency shift to the Doppler frequency set with RICE or pDOPP fading switched on. The actual Doppler frequency shift depends on the simulated angle of incidence of the discrete component.
  • Page 78 Switch-on or off (NONE) of a correlation with the selected path. The correlation of paths 1 to 6 with paths 7 to 12 can only be set in pairs. If option ABFS-B2 is fitted, correlation of paths is only possible within a group. IEC/IEEE-bus command :SOUR:FSIM:PATH6:CORR:PATH COEFF Entry value of the magnitude of the complex correlation coefficient.
  • Page 79: Fine Delay Menu

    Fading Modes ABFS FINE DELAY Menu With the FINE DELAY mode, a better time resolution for the time delay of the individual path can be achieved. Here, four paths are possible. Their system bandwidth is restricted to 4.6 MHz; this is sufficient for 3GPP with 3.84 Msymb/s.
  • Page 80 ABFS Fading Modes 3GPP_3.3.1_CASE5: SPEED: 50 km/h Path 1: DELAY 25 ns PATH LOSS 0 dB Path 2: DELAY 1001 ns PATH LOSS 10 dB IEC/IEEE-bus command :SOUR:FSIM:FDEL:STAN G3C1 Note: - The path delay corresponds delay 3GPP 25.104-320, Appendix B3. However, a basic delay of 25 ns for the fading simulator is taken into account.
  • Page 81: Moving Delay Menu

    Fading Modes ABFS MOVING DELAY Menu In MOVING DELAY mode, the fading simulator simulates dynamic propagation conditions in accordance with 3GPP test case 25.104-320, Appendix B3. Two paths are simulated; the delay of path 1 does not change, the delay of path 2 slowly moves back and forth in a sinusoidal manner.
  • Page 82 ABFS Fading Modes IGNORE RF When enabled, frequency changes less than 5 % are ignored. That permits CHANGES < 5% RF hopping faster than 3 ms. IEC/IEEE-bus command :SOUR:FSIM:IGN:RFCH ON STANDARD Currently the same as SET DEFAULT. SET DEFAULT Sets the default settings for the path parameters.
  • Page 83: Birth-Death Menu

    Fading Modes ABFS BIRTH-DEATH Menu In the BIRTH-DEATH mode, the fading simulator simulates dynamic propagation conditions according to 3GPP test case 25.104-320, Annex B4. Here, 2 paths are simulated, which alternately appear (BIRTH) or disappear (DEATH) at random positions. The time positions lie within the array of [-5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5] µs. After a presettable time (HOPPING DWELL), a path disappears from a position and simultaneously emerges at another randomly chosen position.
  • Page 84 ABFS Fading Modes INSERTION LOSS Selects the setting mode for the insertion loss of the fading simulator. SETTING MODE For an explanation, see STANDARD FADING. IEC/IEEE-bus command :SOUR:FSIM:BIRT:ILOS:MODE NORM :SOUR:FSIM:BIRT:ILOS:MODE LACP SET DEFAULT Sets the default path parameters. IEC/IEEE-bus command...
  • Page 85: Noise Generator

    ABFS Noise Generator In addition to the fading simulators it is also possible to equip ABFS with up to two noise generators (Option ABFS-B1 and ABFS-B3). The task of the noise generators is to add the noise to the ABFS output signal.
  • Page 86: Mode Menu With Built-In Noise Generators Option Abfs-B1 / Option Abfs-B3

    MODE menu (option ABFS-B1 installed) When a second noise source (option ABFS-B3) is fitted, it follows FSIMA2 in the signal path of the basic unit or FSIMB1 if a second fading group (option ABFS-B2) is fitted. See Fig. 4-13 and Fig. 4-14. 1114.8564.12...
  • Page 87: Fig. 4-13 Mode Menu (Options Abfs-B1 / Abfs-B2 Installed)

    Noise Generator ABFS Basic ABFS unit with built-in options ABFS-B1 and ABFS-B3 (two noise generators) NLEV A1 -17.0 dBfs ILOSS A1 ILOSS A2 NLEV B1 -17.0 dBfs AWGN A/B FSIM A-2CH/2IN/2OUT MODE FSIM 2CHANNEL/ 6PATH/2INPUT/2OUTPUT MODE FSIM GROUP A AWGN...
  • Page 88: Awgn Menu

    The system bandwidth is the RF bandwidth by which the noise power is calculated. ABFS can set the bandwidth of the generated noise only in steps. The noise bandwidth is always set. It corresponds to at least the 1.4-fold of the system bandwidth but max.
  • Page 89: Calibration

    ABFS Calibration The internal calibration of ABFS can be called up in the CALIBRATE menu. Moreover, an offset voltage can be entered for each input or output to compensate external DC offset voltages. The connection of the individual inputs and outputs is displayed in the CALIBRATE menu and depends on the relevant mode set.
  • Page 90: Memory Sequence

    ABFS Memory Sequence Memory Sequence In the memory sequence mode the unit automatically processes a list with stored device settings. Memory locations 1 to 50 are available. They are loaded with SAVE and their stored settings can either be called up individually using RECALL or automatically one after the other in the SEQUENCE mode.
  • Page 91: Modes (Mode)

    Memory Sequence ABFS Modes (MODE) The following modes are available: AUTO Run from beginning to end of list including an automatic restart at the beginning. If another mode is switched on prior to AUTO mode, the run is continued from the current index.
  • Page 92 ABFS Memory Sequence Menu selection:MEM SEQ ILOSS A1 ILOSS A2 FSIM A-2CH/2IN/2OUT MODE MODE AUTO SINGLE STEP EXT-SINGLE EXT_STEP FSIM AWGN RESET SEQUENCE CALIBRATE CURRENT INDEX MEM SEQ HOP CONTROL UTILITIES HELP SELECT LIST... CURRENT LIST: MSEQ2 DELETE LIST... FUNCTION...
  • Page 93: Fig. 4-18 Mem Seq Menu, Edit Page

    Memory Sequence ABFS The second page of the MEM SEQ menu, the EDIT page, is activated automatically if one of the editing functions is selected in the FUNCTION line. The list executed in the SELECT LIST line as CURRENT LIST is indicated.
  • Page 94: Hop Control

    HOP CONTROL HOP CONTROL With the HOP mode of ABFS it is possible to simulate frequency hopping. In this mode, a sequence of fixed frequency points is scrolled through. Since a list index (= channel number) is transmitted via the serial hop interface (HOP CONTROL 1 and HOP CONTROL 2), a new fading frequency for the fading channel is selected from the HOP frequency lists.
  • Page 95: Hop Control Without Trigger Control

    The fading process is interrupted during the calculation and setting of the new fading parameters. The output signal is switched to 0 V. This is indicated at ABFS by means of the BLANK line. See Fig. 4-19 for more information.
  • Page 96: Hop Control With Trigger Control

    After reception of the trigger signal ABFS implements a certain interval (approx. 100µs) during which the current fading profile can be processed. ABFS then activates the BLANK line (signal 2) and starts to calculate the new fading profile. The time required for the calculation and setting of the new fading parameters strongly depends on the number of paths activated and the fading profiles set.
  • Page 97: Hop Control Menu

    HOP CONTROL 1 Indication of fading channels set with the frequency of HOP CONTROL 1. With option ABFS-B2 fitted (second fading group), the assignment of fading channels can be switched under HOP CONTROL 2, for HOP CONTROL 1 from A1/A2 to A2.
  • Page 98 540MHz,1.2GHz,1.9GHz,... HOP CONTROL 2 Indication of fading channels set with the frequency of HOP CONTROL 2. With option ABFS-B2 fitted, the assignment of the channels of GROUP A and GROUP B can be switched over. HOP CONTROL 1 A1/A2 <-> A1 HOP CONTROL 2 B1/B2 <->...
  • Page 99: Fig. 4-22 Hop Control Menu, Edit Page

    HOP CONTROL ABFS The second page of the HOP CONTROL menu, the EDIT page, is activated automatically if one of the editing functions of the FUNCTION line is selected. The list executed in the SELECT LIST line as CURRENT is indicated.
  • Page 100: Utilities

    ABFS Utilities Utilities The UTILITIES menu comprises submenus for general functions that are not directly related to signal generation. IEC/IEEE-Bus Address (SYSTEM - GPIB) The SYSTEM – GPIB submenu provides access to the remote control address. The setting range is from 0 to 30.
  • Page 101: Parameter Of Rs-232-C Interface (System - Rs232)

    Utilities ABFS Parameter of RS-232-C Interface (SYSTEM - RS232) The SYSTEM-RS232 submenu provides access to the configuration of the RS-232-C interface and the hop interfaces. The pin assignment of the interfaces corresponds to that of a PC. Menu selection:UTILITIES - SYSTEM - RS232...
  • Page 102: Display Of Iec/Ieee-Bus Language

    ABFS Utilities HANDSHAKE Selection of handshake for the RS-232-C interface. RS232 no handshake IEC/IEEE-bus command :SYST:COMM:SER:PACE NONE :SYST:COMM:SER:CONT:RTS ON RTS/CTS hardware handshake via interface lines RTS and CTS. Use this setting instead of XON/XOFF setting if this is permitted by the host computer.
  • Page 103: Password Entry With Protected Functions (Protect)

    Utilities ABFS Password Entry With Protected Functions (PROTECT) Calibration and service functions are protected by a password. To undo the lock, enter the correct password, a 6-digit number, and then confirm the entry by pressing the [ENTER] key. The lock is automatically active after power-up of the unit.
  • Page 104: Display Of Module Versions (Diag-Config)

    ABFS Utilities Display of Module Versions (DIAG-CONFIG) The installed modules with their versions and modification indexes can be displayed for service purposes. The DIAG – CONFIG submenu provides access to the module display. IEC/IEEE-bus command :DIAG:INFO:MOD? Menu selection:UTILITIES - DIAG – CONFIG...
  • Page 105: Voltage Indication Of Testpoints (Diag-Tpoint)

    Utilities ABFS Voltage Indication of Testpoints (DIAG-TPOINT) The DIAG – TPOINT submenu provides access to internal testpoints. If a testpoint is switched on, a window with voltage indication is displayed in the header. For further information see service manual instrument.
  • Page 106: Indication Of Service Data (Diag - Param)

    ABFS Utilities Indication of Service Data (DIAG - PARAM) The DIAG – PARAM menu provides access to different parameters such as serial number, software version, counter of operating hours and attenuator switch cycles. Menu selection:UTILITIES - DIAG - PARAM ILOSS A1...
  • Page 107: Test (Test)

    ABFS Test (TEST) On power-up, ABFS initiates a selftest which runs continuously during operation. The RAM and ROM contents are checked upon power-up. If an error is detected, a corresponding error message is output. The battery voltage of the non-volatile RAM is also checked upon power-up (TEST POINT 0007 = RAM batteries).
  • Page 108: Set Trigger Inputs (Trigger)

    ABFS Utilities Set Trigger Inputs (TRIGGER) The UTILITIES – TRIGGER menu provides access to settings relating to the TRIGGER input and the BLANK output. For further information see Sections "HOP CONTROL" and "Memory Sequence". Menu selection:UTILITIES - TRIGGER ILOSS A1...
  • Page 109: Switch On/Off Of Beeper

    Utilities ABFS Switch On/Off of Beeper The beeper can be switched on/off via the UTILITIES – BEEPER menu. Note: Preset does not change the current state (ON or OFF). Menu selection:UTILITIES - BEEPER ILOSS A1 ILOSS A2 FSIM A-1CH/1IN/1OUT BEEPER...
  • Page 110: Help System

    Help System Help System ABFS has two help systems: one providing context-sensitive help that can be called up by the [HELP] key and provides information on the current menu. The other system can be accessed via the HELP menu and provides help texts that are displayed after the selection of a keyword. The keywords are listed in alphabetical order.
  • Page 111: Status

    The STATUS page is called up by pressing the [STATUS] key. A return to the previous menu is possible with the [RETURN] key. If ABFS is controlled via the IEC/IEEE bus, the menu too is replaced by the STATUS page.
  • Page 112: Remote Control - Basic Information

    ABFS Brief Instructions Remote Control - Basic Information This chapter provides basic information on remote control, for example on the IEC/IEEE-bus, RS-232-C- interface, interface and device messages, command processing, status reporting system, etc. The instrument is equipped with an IEC/IEEE-bus interface according to standard IEC 625.1/IEEE 488.1 and two RS-232-C interfaces.
  • Page 113: Rs-232-C Interface

    Brief Instructions ABFS RS-232-C Interface It is assumed that the configuration of the RS-232-C interface of the unit has not yet been changed. 1. Connect the unit and the controller using the null modem cable. 2. Enter the following command on the controller to configure the controller interface: mode com1: 9600, n, 8, 1 3.
  • Page 114: Switchover To Remote Control

    ABFS Switchover to Remote Control Switchover to Remote Control On power-up, the instrument is always in the manual control mode ("LOCAL" state) and can be operated via the front panel. The instrument is switched to remote control ("REMOTE" state) as follows: IEC/IEEE-bus: when it receives an addressed command from the controller.
  • Page 115: Return To Manual Operation

    Switchover to Remote Control ABFS Return to Manual Operation Return to manual operation can be made via the front panel or the IEC/IEEE bus. À Press [LOCAL] key. Manually: Note: – Before switchover, command processing must be completed as otherwise switchover to remote control is effected immediately.
  • Page 116: Messages

    ABFS Messages Messages The messages transferred via the data lines of the IEC/IEEE bus can be divided into two groups: – interfaces messages and – device messages No interface messages are defined for the RS-232-C interface. Interface Messages Interface messages are transferred on the data lines of the IEC/IEEE bus, the ATN control line being active.
  • Page 117: Structure And Syntax Of Device Messages

    Structure and Syntax of Device Messages ABFS Structure and Syntax of Device Messages Introduction to SCPI SCPI (Standard Commands for Programmable Instruments) describes a standard command set for programming instruments, irrespective of the type of instrument or manufacturer. The objective of the SCPI consortium is to standardize the device-specific commands to a large extent.
  • Page 118 ABFS Structure and Syntax of Device Messages SOURce FSIM AWGN SPEed ILOSs COUPle DEFault SPEed CORRelation Fig. 5-1 Tree structure of SCPI command systems using the SOURce system as an example Some key words occur at several levels within one command system.
  • Page 119 Structure and Syntax of Device Messages ABFS Parameter: A parameter must be separated from the header by a "white space". If a command includes several parameters, they are separated by a comma ",". Some queries permit the parameters MINimum, MAXimum and DEFault to be entered.
  • Page 120: Structure Of Command Lines

    ABFS Structure and Syntax of Device Messages Structure of Command Lines A command line may contain one or several commands. It is terminated by <New Line>, <New Line> with EOI or EOI together with the last data byte. QuickBASIC automatically produces EOI together with the last data byte.
  • Page 121: Parameters

    Structure and Syntax of Device Messages ABFS Parameters Most commands require a parameter to be specified. Parameters must be separated from the header by a "white space". Permissible parameters are numerical values, Boolean parameters, text, character strings and block data. The parameter type required for a given command and the permissible range of values are specified in the command description.
  • Page 122 ABFS Structure and Syntax of Device Messages Strings Strings must always be entered in inverted commas (’ or "). Example: SYSTem:LANGuage "SCPI" :SYSTem:LANGuage ’SCPI’ Block data Block data are a transmission format which is suitable for the transmission of large amounts of data. A command with a block data parameter has the...
  • Page 123: Overview Of Syntax Elements

    Structure and Syntax of Device Messages ABFS Overview of Syntax Elements Following is an overview of syntax elements. The colon separates the key words of a command. In a command line the separating semicolon marks the uppermost command level. The semicolon separates two commands of a command line.
  • Page 124: Instrument Model And Command Processing

    ABFS Instrument Model and Command Processing Instrument Model and Command Processing The instrument model shown in Fig. 5-2 was created with a view to the processing of IEC/IEEE-bus commands. The individual components work independently of each other and simultaneously. They communicate with each other by means of messages.
  • Page 125: Command Recognition

    Instrument Model and Command Processing ABFS Command Recognition The command recognition analyzes the data from the input unit in the order the data are received. Only DCL commands are serviced with priority, whereas GET commands (Group Execute Trigger), for example, are processed only after the previously received commands. Each recognized command is immediately transferred to the data set but without being executed there at once.
  • Page 126: Output Unit

    ABFS Instrument Model and Command Processing Output Unit The output unit collects the information requested by the controller and output by the data set management. The output unit processes the information in accordance with the SCPI rules and makes it available in the output buffer.
  • Page 127 Status Reporting System ABFS Status Reporting System The status reporting system (see Fig. 5-4) stores all information on the current operating state of the instrument, for example that the instrument is carrying out an AUTORANGE, and on any errors that have occurred.
  • Page 128: Status Reporting System

    ABFS Status Reporting System CONDition part The CONDition part is directly written to by the hardware or the sum bit of the next lower register. Its contents reflects the current instrument status. This register part can be read only but not written to or cleared. Reading does not affect it contents.
  • Page 129: Overview Of Status Registers

    Status Reporting System ABFS Overview of Status Registers -&- not used -&- va cant -&- va cant -&- va cant -&- va cant -&- va cant -&- M Sequ encing -&- not used -&- va cant -&- va cant -&- W aitin g for Trigger -&-...
  • Page 130: Description Of Status Registers

    ABFS Status Reporting System Description of Status Registers Status Byte (STB) and Service Request Enable Register (SRE) The STB is already defined in IEEE 488.2. It provides a rough overview of the instrument status by collecting the pieces of information of the lower registers. It can thus be compared with the CONDition part of an SCPI register and assumes the highest level within the SCPI hierarchy.
  • Page 131: Ist Flag And Parallel Poll Enable Register (Ppe)

    Status Reporting System ABFS IST Flag and Parallel Poll Enable Register (PPE) Analogously with the SRQ, the IST flag combines the entire status information in a single bit. It can be queried by means of a parallel poll (see section "Parallel Poll") or using the command *IST?.
  • Page 132: Status:operation Register

    ABFS Status Reporting System STATus:OPERation Register In the CONDition part, this register contains information on which actions the instrument is currently performing, and in the EVENt part information on what actions the instrument has performed since the register last read.
  • Page 133: Use Of Status Reporting System

    Status Reporting System ABFS Use of Status Reporting System To make effective use of the status reporting system, the information collected there must be transferred to the controller and further processed. There are several methods to this effect which are described in the following.
  • Page 134: Parallel Poll

    ABFS Status Reporting System Parallel Poll In a parallel poll, up to eight instruments are simultaneously requested by the controller by means of a single command to transmit 1 bit of information each on the data lines, ie to set the data line allocated to each instrument to logically "0"...
  • Page 135: Reset Values Of Status Reporting System

    Status Reporting System ABFS Reset Values of Status Reporting System Table 5-6 lists the commands and events that cause a reset of the status reporting system. Except for *RST and SYSTem:PRESet, none of the commands has an effect on the functional settings of the instrument.
  • Page 136: Interfaces

    ABFS Interfaces Interfaces IEC/IEEE-Bus Interface The instrument is equipped with an IEC/IEEE-bus interface as standard. The connector to IEEE 488 is provided at the rear of the instrument. A controller for remote control can be connected via the interface. Connection is made using a shielded cable.
  • Page 137: Interface Functions

    Interfaces ABFS 2. Control bus with 5 lines (Interface Clear): Active LOW resets the interfaces of the instruments connected to the default setting. (Attention): Active LOW signals the transmission of interface messages. Inactive HIGH signals the transmission of device messages.
  • Page 138: Interface Messages

    ABFS Interfaces Interface Messages Interface messages are transmitted to the instrument on the data lines, with the ATN (Attention) line being active LOW. These messages serve for communication between the controller and the instrument. Universal Commands Universal commands are in the code range 10 to 1F hex. They act on all instruments connected to the bus without addressing them before.
  • Page 139: Rs-232-C Interface

    Interfaces ABFS RS-232-C Interface Das Gerät ist serienmäßig mit einer RS-232-C-Schnittstelle ausgestattet. Der 9-polige Anschlußstecker befindet sich auf der Geräterückseite. Über die Schnittstelle kann ein Controller zur Fernsteuerung angeschlossen werden. Characteristics of Interface ì Serial data transmission in asynchronous mode ì...
  • Page 140: Transmission Parameters

    ABFS Interfaces Transmission Parameters To ensure error-free and correct data transmission, the transmission parameters on the instrument and the controller must have the same settings. The settings are made in the UTILITIES - SYSTEM - RS232 menu. Transmission rate Eight different baud rates can be set on the instrument: (baud rate) 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200.
  • Page 141: Handshake

    Interfaces ABFS Handshake Software handshake The software handshake with the XON/XOFF protocol controls data transmission. If the receiver (instrument) wishes to inhibit the input of data, it sends XOFF to the transmitter. The transmitter then interrupts data output until it receives XON from the receiver. The same function is also provided at the transmitter end (controller).
  • Page 142: Remote Control - Command Description

    ABFS Command Description – Notation Remote Control – Command Description In the following sections, all commands implemented in the unit are first listed in a table according to the command system and are then described in detail. The notation is largely in line with the SCPI standard.
  • Page 143 Command Description – Notation ABFS Upper/lower case Upper/lower-case characters are used to denote long and short form notation of command keywords. The instrument does not differentiate between upper-case and lower-case characters. Special characters A selection of keywords with the same effect exists for several commands.
  • Page 144: Common Commands

    ABFS Common Commands Common Commands The common commands are based on the IEEE 488.2 (IEC 625.2) standard. A specific command has the same effect in different instruments. The header of these commands consist of an asterisk "*" followed by three letters. Many common commands concern the status reporting system described in detail in chapter 5.
  • Page 145 FSIM ABFS-B3 second AWGN Example of a device response: ABFS-B1,ABFS-B3 *PRE 0 to 255 PARALLEL POLL REGISTER ENABLE sets the Parallel Poll Enable register to the defined value. Query *PRE? returns the contents of the Parallel Poll Enable register in decimal form.
  • Page 146 ABFS Common Commands *RCL 1 to 50 RECALL calls up the device status stored under the given number by means of the *SAV command. 50 device states (1 to 50) can be stored by means of *SAV. *RST RESET sets the device to a defined default state. The command corresponds to a an activation of the [PRESET] key.
  • Page 147: Abort System

    ABORt ABFS ABORt System The ABORt system comprises all the commands to abort triggered actions. After an abort the latter can immediately be retriggered. All commands trigger an event and have therefore no *RST value. Command Parameters Default Remark unit...
  • Page 148: Calibration System

    ABFS CALibration CALibration System The CALibration system contains the commands for calibrating the unit and for setting the offset voltages of the inputs and outputs. Command Parameters Default Remark unit :CALibration :FSIM [:MEASure]? Query only :NDSim Query only [:MEASure]? :OFFSet...
  • Page 149 CALibration ABFS :CALibration:OFFSet:Q:INPut<i> -10mV to 10mV A DC offset voltage to minimize the carrier residual, for example, can be set with this command. Suffix i = [1] or 2 is used to set group A (FSIM1) and i = 3 or 4 to set group B (FSIM2).
  • Page 150: Diagnostic System

    The DIAGnostic system comprises the commands for diagnostic test and service of the unit. SCPI does not define any DIAGnostic commands, the commands listed here are ABFS-specific. All DIAGnostic commands are queries which are not affected by *RST. Hence, no default values are given.
  • Page 151: Format System

    This system contains the commands determining the format of the data returned to the controller by ABFS. All queries returning a list of numeric data or block data are concerned. Whenever this is applicable, a reference is made in the description of the commands.
  • Page 152: Source:awgn Subsystem

    ABFS SOURce:AWGN SOURCe:AWGN Subsystem The AWGN subsystem comprises all commands for setting the noise generator for the fading signal (Additive White Gaussian Noise). The AWGN modules (options ABFS-B1 and ABFS-B3) are controlled by this command. Command Parameters Default Remark unit [:SOURce] :AWGN<i>...
  • Page 153 SOURce:AWGN ABFS [:SOURce]:AWGN<i>:LEVel? This command returns the absolute noise level in V. Example: :SOUR:AWGN:LEV? [:SOURce]:AWGN<i>:BANDwidth | BWIDth 10 kHz to 10 MHz This command sets the bandwidth of noise. Example: *RST value is 20 kHz :SOUR:AWGN:BAND 1.23 MHZ 1114.8564.12 6.12...
  • Page 154: Source:fsim Subsystem

    ABFS SOURce:FSIM SOURce:FSIM Subsystem The FSIM system contains the commands for the fading simulator. Command Parameters Default unit Remark [:SOURce] :FSIMulator<k> where <k>=[1] | 2 (Group [A] | B) :CONFigure SISO | DISO | SIDO | DIDO [:STATe] ON | OFF...
  • Page 155 SOURce:FSIM ABFS Command Parameters Default unit Remark [:SOURce] k = [1] | 2 :FSIMulator<k> Group [A] | B <i> = 1 to 6 (12) :PATH<i> 0 to 360 DEG :CPHase 0.005 to 27 777 MPS Depends on :SPEed :FSIM:SPE:UNIT: 0.1 to 1600.0 Hz...
  • Page 156 ABFS SOURce:FSIM Only with option ABFS-B49 Command Parameters Default Remark unit [:SOURce] :FSIMulator :FDELay Fine delay ON | OFF [:STATe] G3C1 | G3C2 | G3C3 | G3C4 | G3C5 :STANdard :SPEed MPS | KMPH | MPH :UNIT :DEFault (none) :PATH<i>...
  • Page 157 The following commands can be set separately for group A (k = 1 or without suffix) and group B (k = 2). The fading simulator group is selected with suffix <k>; group B (k = 2) is only available with option ABFS-B2. Example:...
  • Page 158 ABFS SOURce:FSIM RST value is OFF [:SOURce]:FSIMulator<k>:STANdard CDMA8 | CDMA30 | to .. This command selects the fading standard. All subsequent FSIM commands are set to a default value. Parameters having a '6' after the first letter are compulsory in the 6-path mode (this mode is switched on if :FSIM:CONF DISO, SIDO or DIDO has been selected).
  • Page 159 SOURce:FSIM ABFS [SOURce]:FSIMulator<k>:COUPle The commands for coupling the settings for all paths are under this node. If the following coupling commands are set to ON, the change of the value in a path (path<i>) is considered in all other paths. If OFF is set to ON for the first time, all paths are set to the value of path 1.
  • Page 160 The resulting insertion loss in dB of the selected channel is queried by this command. These values are also shown in the large ABFS display fields. Channel 2 (<l> = 2) is not available for :FSIM:CONF SISO. This command is a query and has therefore no *RST value.
  • Page 161 SOURce:FSIM ABFS [:SOURce]:FSIMulator<k>:PATH<i>:FRATio -1.0 to +1.0 This command sets the frequency ratio of the Doppler shift. The resolution is 0.1. Example: *RST value is 1 :SOUR:FSIM:PATH3:FRAT 0.5 [:SOURce]:FSIMulator<k>:PATH<i>:CPHase 0 to 360 DEG This command sets the phase for CPHAS fading.
  • Page 162 ABFS SOURce:FSIM [:SOURce]:FSIMulator<k>:PATH<i>:CORRelation:PHASe 0 to 359 DEG This command sets the phase of the complex correlation coefficient. The resolution is 1°. Example: *RST value is 0 :SOUR:FSIM:PATH3:CORR:PHAS 180 [:SOURce]:FSIMulator<k>:PATH<i>:LOGNormal The commands for setting Lognormal fading are under this node. [:SOURce]:FSIMulator<k>:PATH<i>:LOGNormal:STATe ON | OFF This command switches Lognormal fading on or off.
  • Page 163 SOURce:FSIM ABFS [:SOURce]:FSIMulator:FDELay:DEFault This command sets the default settings of the path parameters for fine delay simulation (as with *RST). The command triggers an event, and therefore has no *RST value and no query form. Example: :SOUR:FSIM:FDEL:DEF [:SOURce]:FSIMulator:FDELay:PATH<i> The following commands are separately settable for every path. The path is selected with the suffix <i>, which has a valid range of 1 to 4.
  • Page 164 ABFS SOURce:FSIM [:SOURce]:FSIMulator:FDELay:PATH<i>:DELay 25 ns to 1637 us This command specifies the signal delay in the path for fine delay simulation. Example: *RST value is 25 ns :SOUR:FSIM:FDEL:PATH3:DEL 123E-6 [:SOURce]:FSIMulator:MDELay[:STATe] ON | OFF This command switches moving delay simulation on or off.
  • Page 165 SOURce:FSIM ABFS [:SOURce]:FSIMulator:BIRThdeath[:STATe] ON | OFF This command switches birth-death simulation on or off. Example: *RST value is OFF :SOUR:FSIM:BIRT ON [:SOURce]:FSIMulator:BIRThdeath:SPEed:UNIT MPS | KMPH | MPH This command sets the speed unit for birth-death simulation. m/s, meters per second...
  • Page 166 ABFS SOURce:FSIM [:SOURce]:FSIMulator:BIRThdeath:PATH<i>:FDOPpler 0.1 Hz to 1600 Hz This command presets the Doppler frequency (linked with vehicle speed). The resolution is 0.1 Hz. The value may only be set in path 1 and is taken over for PATH2. Example: *RST value is 9.3 :SOUR:FSIM:BIRT:PATH:FDOP 100 [:SOURce]:FSIMulator:BIRThdeath:PATH<i>:LOSS 0 dB to 50.0 dB...
  • Page 167: Source:hop Subsystem

    SOURce:HOP ABFS SOURce:HOP Subsystem This subsystem comprises the commands for setting the frequency of the fading simulator via a list (see :SOUR:FSIM:CHAN:RF). Up to 10 lists can be created. The number of entries into the list must not exceed 2000 however.
  • Page 168 ABFS SOURce:HOP [:SOURce]:HOP<i>:CONTrol A2 | B The command sets the assignment of fading channels to the hop systems. For HOP1 this is only one query (response A1 or A1A2) since the assignment is defined by the HOP2:CONT command. A1A2 or B1B2 concerns both channels of the corresponding fading simulator.
  • Page 169: Status System

    STATus ABFS STATus System This system comprises the commands for the status reporting system (see chapter 5, Status Reporting System). *RST has no effect on the status registers. Default Command Parameters Remark unit :STATus :OPERation Query only [:EVENt]? Query only...
  • Page 170 ABFS STATus :STATus:OPERation:NTRansition 0 to 32767 The command (NegativeTRansition) sets the edge detectors of all bits of the STATus:OPERation register from 1 to 0 for the transitions of the CONDition bits. Example: :STAT:OPER:NTR 0 :STATus:OPERation:ENABle 0 to 32767 The command sets the bits of the EnNABle register. This register selectively enables the...
  • Page 171 STATus ABFS :STATus:QUEStionable:ENABle 0 to 32767 This commands sets the bits in the ENABle register of the STATus:QUEStionable register. This part selectively enables the individual events of the appropriate EVENt part for the sum bit in the status byte. Example:...
  • Page 172: System System

    ABFS SYSTem SYSTem System In this system, a number of commands for general functions, which are not immediately related to signal generation, are combined. Command Parameters Default Remark unit :SYSTem :BEEPer :STATe ON | OFF :COMMunicate :GPIB :LTERminator EOI | STANdard...
  • Page 173 SYSTem ABFS :SYSTem:COMMunicate The commands for setting the remote-control commands are under this node. :SYSTem:COMMunicate:GPIB The commands for checking the IEC/IEEE bus (GPIB = General Purpose Interface Bus) are under this node. :SYSTem:COMMunicate:GPIB:LTERminator EOI | STANdard The command sets the delimiter identification mode. EOI only identifies a character that is transmitted with the EOI circuit message.
  • Page 174 SCPI (see chapter 9). If the error queue is empty, 0 (No parity) is returned. The command is identical with STATus:QUEue:NEXT? Example: Response: 221, "Settings conflict" :SYST:ERR? :SYSTem:KLOCk ON | OFF The command (Keyboard LOCk) locks the ABFS keyboard including the [LOCAL] (ON) key or unlocks it again (OFF). Caution: keyboard cannot enabled, :SYSTem:SECurity :SYSTem:KLOCk OFF will not be accepted.
  • Page 175 SYSTem ABFS :SYSTem:MSEQuence This command path can manage several memory sequences each of which consists of a list of device state numbers and a time list. If :SYSTem:MODE is switched to MSEQuence, the device states stated in the selected list are set successively for the time stated in the time list. For further commands see Trigger System ( TRIGger:MSEQuence to ) and ABORt:MSEQ.
  • Page 176 ABFS SYSTem :SYSTem:MSEQuence[:RCL] 1 to 50 {,1 to 50} The command transmits the list of device states to be assumed successively. The list contains integers denoting the states stored by means of *SAV. The device states are set successively using a simulated *RCL (thus the name of the list). The length of the list is not limited. The values of the lists are between 1 and 50 (number of memory locations that can be called).
  • Page 177 SYSTem ABFS :SYSTem:SECurity[:STATe] ON | OFF The command switches the security state on or off. The following command cannot be executed: :SYSTem:KLOCk OFF In the transition from ON to OFF all data existing in the unit except for the calibration data are deleted, especially all status registers, device states and lists.
  • Page 178: Test System

    ABFS TEST TEST System This system comprises the commands to execute selftest routinesand to directy manipulate hardware modules (:TEST:DIRect). The selftests return a 0 if the test has been executed successfully, otherwise a value unequeal to 0. All commands of this system do not have a *RST value.
  • Page 179 TEST ABFS :TEST:DIRect:FSIM3M Subaddress, hex data string The command acts on the first module of FSIM2 (Group B). :TEST:DIRect:FSIM4M Subaddress, hex data string The command acts on the second module of FSIM2 (Group B). :TEST:DIRect:NDSIM1M Subaddress, hex data string The command acts on the first module of NDSIM (AWGN).
  • Page 180: Trigger System

    The TRIGger system contains the commands to select the trigger source and to configure the external trigger connector. The trigger system of ABFS is a simplified implementation of the SCPI trigger system. Compared to SCPI, the TRIGger system shows the following differences: •...
  • Page 181 The command defines the trigger mode. SCPI uses other designations for the parameters that are also accepted by the unit. These designations are to be preferred if compatibility is important. The following table gives an overview: ABFS designation SCPI designation Command for manual control...
  • Page 182: Command List

    ABFS Command List Command List Command Parameters SCPI Info Page :ABORt:MSEQuence not-SCPI :CALibration:FSIM[:MEASure]? not-SCPI :CALibration:NDSim[:MEASure]? not-SCPI :CALibration:OFFSet:I:INPut<i> -10mV...10mV not-SCPI :CALibration:OFFSet:I:OUTPut<i> -10mV...10mV not-SCPI :CALibration:OFFSet:Q:INPut<i> -10mV...10mV not-SCPI :CALibration:OFFSet:Q:OUTPut<i> -10mV...10mV not-SCPI :DIAGnostic:INFO:MODules? :DIAGnostic:INFO:OTIMe? :DIAGnostic:INFO:SDATe? :DIAGnostic[:MEASure]:POINt<i>? :FORMat[:DATA] ASCii | PACKed 6.10 :FORMat:BORDer NORMal | SWAPped 6.10...
  • Page 183 Command List ABFS Command Parameters SCPI Info Page [:SOURce]:FSIMulator<k>:PATH<i>:SPEed 0.005...27777 (in MPS; m/s) not-SCPI 6.20 [:SOURce]:FSIMulator<k>:PATH<i>:FDOPpler 0.1 ... 1600 Hz not-SCPI 6.20 [:SOURce]:FSIMulator<k>:PATH<i>:LOSS 0...50.0 dB not-SCPI 6.20 [:SOURce]:FSIMulator<k>:PATH<i>:DELay 0...1638.0 E-6S not-SCPI 6.20 [:SOURce]:FSIMulator<k>:PATH<i>:CORRelation:PATH 0 | 7...12 not SCPI 6.20 [:SOURce]:FSIMulator<k>:PATH<i>:CORRelation:COEFficent 0...1.0...
  • Page 184 ABFS Command List Command Parameters SCPI Info Page [:SOURce]:HOP<i>:FREQuency 1.0 MHz...99 GHz {, 1.0 MHz...99 GHz} | 6.27 Block data [:SOURce]:HOP<i>:FREQuency:POINts? 6.27 [:SOURce]:HOP<i>:SELect 'List name' not SCPI 6.27 :STATus:OPERation[:EVENt]? 6.28 :STATus:OPERation:CONDition? 6.28 :STATus:OPERation:PTRansition 0...32767 6.28 :STATus:OPERation:NTRansition 0...32767 6.29 :STATus:OPERation:ENABle 0...32767 6.29...
  • Page 185 Command List ABFS Command Parameters SCPI Info Page :TEST:DIRect:NDSIM2M Subaddress, hex data string 6.38 :TEST:DIRect:NDSIM3M Subaddress, hex data string 6.38 :TEST:FSIM 6.38 :TEST:NDSim 6.38 :TEST:RAM? 6.38 :TEST:ROM? 6.38 :TEST:BATTery[:RAM]? 6.38 :TRIGger:HOP:STATe ON | OFF not-SCPI 6.39 :TRIGger:HOP:SOURce SERial | EXTernal not-SCPI 6.39...
  • Page 186: Remote Control - Programming Examples

    CALL IBTMO(generator%, 11) ’Response time to 1 sec REM ************************************************************************ Initiate Instrument The IEC-bus status registers and instrument settings of the ABFS are brought into the default status. REM ------------ Initiate Instrument -------------- REM InitDevice CALL IBWRT(generator%, "*CLS") ’Reset status register CALL IBWRT(generator%, "*RST")
  • Page 187: Transmission Of Instrument Setting Commands

    Programming Examples ABFS Transmission of Instrument Setting Commands Frequency and Standard are set in this example, furthermore the function is started. REM -------- Instrument setting commands ------------- CALL IBWRT(generator%, "FSIM:CHANNEL:RF 250E6") ’RF frequency 250 MHz CALL IBWRT(generator%, "FSIM:STANDARD GTU3") ’Standard CALL IBWRT(generator%, "FSIM:SEQUENCE RUN")
  • Page 188: List Management

    ABFS Programming Examples List Management REM -------- Example of list management ----------- CALL IBWRT(generator%, "HOP:SELECT "+CHR$(34)+"LIST1"+CHR$(34)) ’Select list "LIST1", is generated if necessary CALL IBWRT(generator%,"HOP:FREQ 575MHz,235MHz,123MHz,456MHz,735MHz,333MHz") ’Fill frequency list with values CALL IBWRT(generator%, "HOP:STATE ON") ’Switch over instrument to list mode...
  • Page 189: Service Request

    Programming Examples ABFS Service Request The service request routine requires an extended initialization of the instrument in which the respective bits of the transition and enable registers are set. In order to be able to use the service request function in conjugation with a National Instruments GPIB driver, the setting "Disable Auto Serial Poll"...
  • Page 190 ABFS Programming Examples Reading out the status event registers, the output buffer and the error/event queue is effected in subroutines. REM -------- Subroutines for the individual STB bits ------ Outputqueue: ’Reading the output buffer Message$ = SPACE$(100) ’Make space for response CALL IBRD(generator%, Message$) PRINT "...
  • Page 192: Maintenance

    ABFS Maintenance Maintenance The present chapter describes the measures that are necessary for maintaining, storing and packing the instrument. The instrument does not need a periodic maintenance. What is necessary is essentially the cleaning of the outside of the instrument.
  • Page 194: Error Messages

    The present chapter contains the error messages (short-term and long-term messages) of the ABFS. The ABFS displays error and caution messages in a different manner, depending on how long, for a short period of time or permanently, the cause exists.
  • Page 195: List Of Error Messages

    Error Messages ABFS List of Error Messages The following list contains all SCPI- and device-specific error messages for errors occurring in the instrument. The meaning of negative error codes is defined in SCPI, positive error codes mark device- dependent errors.
  • Page 196 ABFS Error Messages Command Error, continued Error code Error text with queue poll Explanation of error Program mnemonic too long -112 The header contains more than 12 characters. Undefined header -113 The header is not defined for the instrument. Example: *XYZ is undefined for every instrument.
  • Page 197 Error Messages ABFS Execution Error – error in the execution of a command; sets bit 4 in the ESR register Error code Error text with queue poll Explanation of error Command protected -203 The desired command could not be executed as it is protected by a password.
  • Page 198 ABFS Error Messages Device Specific Error - sets bit 3 in the ESR register Error code Error text with queue poll Explanation of error System error -310 This error message suggests an error within the instrument. Please inform your R&S service center.
  • Page 199: Abfs- Specific Error Messages

    Error Messages ABFS ABFS- Specific Error Messages Device-dependent Error – device-specific error; sets bit 3 in the ESR register. Error code Error text in the case of queue poll Error explanation Calibration failed Calibration could not be executed. Calibration data missing Calibration data are missing in the device memory.
  • Page 200 Data set (IEC/IEEE bus)........... 5.14 CMOS-RAM................1.2 DCL.................. 5.13 test ................6.38 Decimal point ..............5.10 Colon ................5.12 Delay Combination of options with ABFS........4.17 signal (fading simulation)........4.9, 6.20 Comma ................5.12 Delete Command all stored data ............6.36 addressed commands ..........5.27 list ................3.9 common commands ........
  • Page 201 Index ABFS Device settings Laufzeitänderung ..........4.13, 6.23 load ................6.5 Moving Delay ............. 6.23 reset ..............6.5, 6.35 Profil ..........4.11, 4.15, 6.22, 6.24 store ................6.5 Signalverzögerung ......4.11, 4.13, 4.15, 6.23 Device-Dependent Error bit ..........5.20 Verweildauer ............. 4.15, 6.25 Digit cursor .................3.1 Front panel .................
  • Page 202 Laufzeitänderung MODE (with ABFS-B2)..........4.3 Fading Simulation..........4.13, 6.23 MODE (with option ABFS-B1) ........4.17 List MODE (with options ABFS-B1 and ABFS-B2).... 4.18 HOP CONTROL ............4.29 MODE (with options ABFS-B1, ABFS-B2 and ABFS- Memory sequence ............4.23 B3) ................4.18 List QUICK SELECT............
  • Page 203 Option ABFS-B3 Rayleigh fading (fading simulation)......4.7, 6.19 manual control............4.17 RCL liste MSEQ ............... 6.35 Options Rear panel................ 1.13 possible combinations with ABFS.......4.17 Remote control Output indications..............5.3 BLANK .............. 1.13, 4.39 switchover to remote control ........5.3 signal................1.13 Remote state..............
  • Page 204 ABFS Index transmission parameters ..........4.32 Synchronization (IEC/IEEE bus)........5.15 Syntax elements (IEC/IEEE bus)........5.12 System bandwidth........... 4.19, 6.12 Sample Settings ..............2.2 Save instrument settings .............3.15 Terminator................ 5.13 SCPI Terrain constant (fading simulation) ......... 6.21 introduction..............5.6 Test version................6.36 battery................ 4.38 Select mark ................3.1 CMOS-RAM ...............

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