Fluke 294-U User Manual

Fluke 294-U Manual

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  • Fluke 294-U | User Manual - Page 1
    ® 291, 292, 294 100 MS/s Arbitrary Waveform Generators Users Manual March 2006 © 2006 Fluke Corporation, All rights reserved. Printed in USA All product names are trademarks of their respective companies.
  • Fluke 294-U | User Manual - Page 2
    Fluke. Warranty support is available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price. Fluke Fluke authorized service center within the warranty period. To obtain warranty service, contact your nearest Fluke authorized service
  • Fluke 294-U | User Manual - Page 3
    has been tested in accordance with EN61010-1, CSA 22.2 No. 61010-104 and UL 61010A-1 and has been supplied in a safe condition. This instruction manual contains some information and warnings which have to be followed by the user to ensure safe operation and to retain the instrument in a safe
  • Fluke 294-U | User Manual - Page 4
    qualified recycler or hazardous materials handler. Contact your authorized Fluke Service Center for recycling information. Caution Do not wet the instrument The following symbols are used on the instrument and in this manual: Caution - refer to the accompanying documentation, incorrect operation may
  • Fluke 294-U | User Manual - Page 5
    EMC Compliance This instrument meets the requirements of the EMC Directive 89/336/EEC. Compliance was demonstrated by meeting the test limits of the following standards: Emissions EN61326 (1998) EMC product standard for Electrical Equipment for Measurement, Control and Laboratory Use. Test limits
  • Fluke 294-U | User Manual - Page 6
    all case screws are correctly refitted and tightened. c) In the event of part replacement becoming necessary, only use components of an identical type, see the Service Manual. iv
  • Fluke 294-U | User Manual - Page 7
    Table of Contents Chapter Title Page Safety...i EMC Compliance iii Emissions...iii Immunity ...iii 1 Introduction and Specifications 1-1 Introduction...1-2 Introduction...1-2 Specifications...1-4 Waveforms ...1-4 Standard Waveforms 1-4 Arbitrary Waveforms 1-5 Sequence 1-5 Output Filter
  • Fluke 294-U | User Manual - Page 8
    291, 292, 294 Users Manual Inter-Channel Modulation 1-9 Inter-Channel Analog Summing 1-10 Inter-Channel Synchronization 1-10 Inter-Channel Triggering 1-10 Interfaces ...1-11 General ...1-11 2 Installation 2-1 AC Supply Voltage 2-2 Fuse ...2-2
  • Fluke 294-U | User Manual - Page 9
    External Trigger Input 7-2 Adjacent Channel Trigger Output 7-3 Triggered Burst 7-3 Trigger Source 7-4 Trigger Edge 7-4 Burst Count...7-4 Start Phase ...7-5 Manual Initialization of Inter-Channel Triggering 7-5 Gated mode ...7-6 Gate Source 7-6 Gate Polarity 7-6 Start Phase ...7-6 Sync Out in
  • Fluke 294-U | User Manual - Page 10
    291, 292, 294 Users Manual Block Copy 9-8 Waveform Amplitude 9-9 Waveform Offset 9-10 Wave Invert 9-10 Position Markers 9-10 Arbitrary Waveform Sequence 9-11 Sequence Set-Up 9-12 Frequency and Amplitude Control
  • Fluke 294-U | User Manual - Page 11
    17-7 GPIB Parallel Poll 17-7 Status Reporting 17-8 Standard Event Status and Standard Event Status Enable Registers 17-8 Status Byte Register and Service Request Enable Register 17-9 Power-On Settings 17-10 Remote commands 17-10 RS232 Remote Command Formats 17-10 GPIB Remote Command Formats
  • Fluke 294-U | User Manual - Page 12
    291, 292, 294 Users Manual Modulation Commands 17-19 Synchronizing Commands 17-19 Status Commands Single Channel F-1 F-2. Inter-Channel Block Diagram F-2 G-1. Model 291 Front Panel G-1 G-2. Model 292 Front Panel G-2 G-3. Model 294 Front Panel G-2 G-4. Model 291 Rear Panel G-2 G-5. Model 294
  • Fluke 294-U | User Manual - Page 13
    Chapter 1 Introduction and Specifications Title Page Introduction...1-2 Specifications...1-4 Waveforms ...1-4 Standard Waveforms 1-4 Arbitrary Waveforms 1-5 Sequence 1-5 Output Filter 1-5 Noise ...1-5 Operating modes 1-6 Triggered Burst 1-6 Gated ...1-6 Sweep ...1-6 Tone Switching 1-7
  • Fluke 294-U | User Manual - Page 14
    291, 292, 294 Users Manual Introduction This range of synthesized programmable arbitrary waveform generators have the following features: • 1, 2 or 4 independent arb channels • Additional DC to 50MHz fixed amplitude sine and
  • Fluke 294-U | User Manual - Page 15
    are required. The generator parameters are clearly displayed on a backlit LCD with 4 rows of 20 characters. Soft-keys and sub menus are used to guide the user through even the most complex functions. All parameters can be entered directly from the numeric keypad. Alternatively most parameters can be
  • Fluke 294-U | User Manual - Page 16
    291, 292, 294 Users Manual Specifications Specifications apply at 18 to 28 ºC after 30 minutes warm-up, at maximum output into 50 Ω. Waveforms Standard Waveforms Sine, square, triangle, DC, positive
  • Fluke 294-U | User Manual - Page 17
    1 Introduction and Specifications Specifications Pulse and Pulse Train Output level: Rise and fall times: Period: range: resolution: accuracy: Delay: range: resolution: 2.5 mV to 10V p-p into 50 Ω
  • Fluke 294-U | User Manual - Page 18
    291, 292, 294 Users Manual Operating modes Triggered Burst Each active edge of the trigger ). Variable during sweep. The sweep may be free run or triggered from the following sources: manually from keyboard, externally from TRIG IN input or remote interface. Sweep can be held and restarted by the
  • Fluke 294-U | User Manual - Page 19
    1 Introduction and Specifications Specifications Multi channel sweep Any number of channels may be swept simultaneously with independent sweep parameters for each channel. Amplitude, Offset and Waveform can be set independently for each channel. Tone Switching Capability provided for both
  • Fluke 294-U | User Manual - Page 20
    291, 292, 294 Users Manual Resolution: 3 digits or 1 mV for both amplitude and dc offset. Sync Output - one for each channel Multifunction output user definable or automatically selected to be
  • Fluke 294-U | User Manual - Page 21
    1 Introduction and Specifications Specifications Input impedance: Typically 1 kΩ. Sum In Frequency range: Signal range: Input impedance: DC to 30 MHz (25 MHz on 2- and 4-channel instruments) Approximately 2 V p-p input for 20 V p-p output; maximum input ±10 V. Typically 1 kΩ. Hold Holds an
  • Fluke 294-U | User Manual - Page 22
    291, 292, 294 Users Manual Modulation source: Frequency range: Internal AM: depth: resolution: Carrier suppression (SCM): External modulation signal range: VCA: SCM: Internal from the previous channel; external from modulation
  • Fluke 294-U | User Manual - Page 23
    1 Introduction and Specifications Specifications The previous/next connections can be used to daisy chain a trigger signal from a start channel, through a number of channels in the chain to an end channel. Each channel receives the trigger out signal from the previous (or next) channel, and drives
  • Fluke 294-U | User Manual - Page 24
    291, 292, 294 Users Manual 1-12
  • Fluke 294-U | User Manual - Page 25
    Chapter 2 Installation Title Page AC Supply Voltage 2-2 Fuse ...2-2 AC Supply Cable 2-2 Mounting...2-2 Ventilation ...2-2 2-1
  • Fluke 294-U | User Manual - Page 26
    291, 292, 294 Users Manual AC Supply Voltage Check that the instrument operating voltage the set operating voltage. The correct mains fuse types are listed in Appendix A, together with instructions for fuse replacement. AC Supply Cable Warning To avoid the possibility of electric shock, this
  • Fluke 294-U | User Manual - Page 27
    Chapter 3 Connections Title Page Front panel connections 3-2 MAIN OUT 3-2 SYNC OUT 3-2 TRIG IN ...3-3 SUM IN ...3-3 MODULATION 3-3 Rear Panel Connections 3-3 REF CLOCK IN/OUT 3-3 HOLD IN...3-3 ARB CLOCK IN/OUT 3-4 MAIN OUT 3-4 RS232 ...3-4 GPIB (IEEE-488 3-5 USB ...3-5 MEMORY CARD 3-5
  • Fluke 294-U | User Manual - Page 28
    291, 292, 294 Users Manual Front panel connections MAIN OUT (1 per channel) MAIN OUT is the all other times. Trigger Provides a positive-going version of the actual trigger signal; internal, external, manual and remote all produce a trigger sync. Sweep sync Phase lock Goes high at the start of
  • Fluke 294-U | User Manual - Page 29
    3 Connections Rear Panel Connections TRIG IN This is the external input for trigger, gate, sweep and sequence operations. It is also the input used to synchronize the generator as a slave to another generator which is the master. Caution Do not apply an external voltage exceeding ±10 V. SUM IN
  • Fluke 294-U | User Manual - Page 30
    291, 292, 294 Users Manual Caution Do not apply an external voltage exceeding ±10 V. ARB CLOCK IN/OUT Set to an input, this is the input for a user-supplied ARB
  • Fluke 294-U | User Manual - Page 31
    3 Connections Rear Panel Connections GPIB (IEEE-488) The GPIB interface is not isolated; the GPIB signal grounds are connected to the instrument ground. The implemented subsets are: SH1, AH1, T6, TE0, L4, LE0, SR1, RL1, PP1, DC1, DT1, C0, E2. The GPIB address is set from the remote menu on the
  • Fluke 294-U | User Manual - Page 32
    291, 292, 294 Users Manual 3-6
  • Fluke 294-U | User Manual - Page 33
    Chapter 4 Initial Operation Title Page Introduction...4-2 Initial Operation 4-2 Switching On 4-2 Display Contrast 4-2 Keyboard ...4-2 Principles of Editing 4-3 Principles of Operation 4-5 Clock Synthesis Mode 4-5 DDS Mode...4-6 4-1
  • Fluke 294-U | User Manual - Page 34
    291, 292, 294 Users Manual Introduction This section is a general introduction to the organization . Detailed operation is covered in later sections starting with "Standard Waveform Operation". In this Users Manual front panel keys and sockets are shown in capitals, e.g. CREATE, SYNC OUT; all soft-
  • Fluke 294-U | User Manual - Page 35
    triggering (when TRIG IN is appropriately set) and for synchronizing two or more generators when suitably connected together. MAN HOLD is used to manually pause arbitrary waveform output and sweep; the output is held at the level it was at when MAN HOLD was pressed. • UTILITY gives access to
  • Fluke 294-U | User Manual - Page 36
    291, 292, 294 Users Manual Note On multi-channel instruments the channel to be edited must Repeated presses of the mode soft-key will toggle the mode between its two possible settings of auto and manual. Similarly, when type is selected, repeated presses of the type soft-key (or cursor keys or use
  • Fluke 294-U | User Manual - Page 37
    4 Initial Operation Principles of Operation Thus for STANDARD FREQUENCY set to 1.000000000 MHz rotating the control will change the frequency in 1 kHz steps. The display will autorange up or down as the frequency is changed, provided that autoranging permits the increment size to be maintained; this
  • Fluke 294-U | User Manual - Page 38
    291, 292, 294 Users Manual Arbitrary waveforms have a user defined length of 8 to 1,048,576 points. Square waves use a fixed length of 2 points and pulse and pulse train have their
  • Fluke 294-U | User Manual - Page 39
    Chapter 5 Standard Waveforms Title Page Introduction...5-2 Standard Waveform Operation 5-2 Setting Generator Parameters 5-2 Waveform Selection 5-2 Frequency ...5-2 Amplitude ...5-3 DC Offset ...5-4 Warning and Error Messages 5-5 Synchronization Output 5-6 5-1
  • Fluke 294-U | User Manual - Page 40
    291, 292, 294 Users Manual Introduction This section deals with the use of the instrument as a standard from the standard waveforms screen but are sufficiently different to justify their own section in this manual. Much of the following descriptions of amplitude and offset control, as well as of mode
  • Fluke 294-U | User Manual - Page 41
    5 Standard Waveforms Setting Generator Parameters entered as 12340, 12340·00, or 1·234 exp 4 etc. However, the display will always show the entry in the most appropriate engineering units, in this case 12·34000000 kHz. With period selected instead of freq the frequency can be set in terms of a
  • Fluke 294-U | User Manual - Page 42
    291, 292, 294 Users Manual DC Offset Pressing the OFFSET key gives the DC OFFSET screen: DC OFFSET: program +0.00 mVdc (actual +0.00 mVdc) load:hiZ The offset can be
  • Fluke 294-U | User Manual - Page 43
    5 Standard Waveforms Warning and Error Messages DC OFFSET: program +1.50 Vdc (actual +151 mVdc) load: hiZ The above display shows that the set dc offset is +1.50 V but the actual offset is +151 mV. Note The actual offset value also takes into account the true attenuation provided by the fixed
  • Fluke 294-U | User Manual - Page 44
    291, 292, 294 Users Manual 2. Entering an amplitude of 25 V p-p. The error message: Maximum output level on. Synchronization Output SYNC OUT is a multifunction CMOS/TTL level output that can be automatically or manually set to be any of the following: waveform sync: A square wave with 50 % duty
  • Fluke 294-U | User Manual - Page 45
    mentioned in each of the appropriate main waveform mode sections and a full table is given in the appendix. The automatic selection can still be changed manually by the src soft-key even when auto mode has been selected but the selection will immediately revert to the automatic choice as soon as
  • Fluke 294-U | User Manual - Page 46
    291, 292, 294 Users Manual 5-8
  • Fluke 294-U | User Manual - Page 47
    Chapter 6 Sweep Operation Title Page General...6-2 Principles of Sweep Operation 6-2 Connections for Sweep Operation 6-2 Setting sweep parameters 6-2 Sweep Range 6-3 Sweep Time 6-3 Sweep Type 6-4 Sweep Spacing 6-5 Sweep Marker 6-5 Sweep Hold 6-5 6-1
  • Fluke 294-U | User Manual - Page 48
    291, 292, 294 Users Manual General Principles of Sweep Operation All standard and arbitrary waveforms trigger signal may be provided by any of the possible trigger sources, i.e. internal, external, manual or remote. The generator does not provide a ramp output for use with X-Y displays or recorders
  • Fluke 294-U | User Manual - Page 49
    6 Sweep Operation Setting sweep parameters Menus for setting up the range, time (sweep rate), type (continuous, triggered, etc.) spacing (lin/log) and marker position are all accessed from this screen using the appropriate soft key. Sweep mode itself is turned on and off with alternate presses of
  • Fluke 294-U | User Manual - Page 50
    291, 292, 294 Users Manual Sweep Type Pressing the type... soft key calls the SWEEP TYPE screen. SWEEP TYPE: continuous direction: up sync: on waveform. For triggered sweeps a trigger signal may be provided by any of the possible trigger sources, i.e. internal, external, manual or remote. 6-4
  • Fluke 294-U | User Manual - Page 51
    6 Sweep Operation Setting sweep parameters Sweep Spacing Pressing the spacing... soft key on the SWEEP SETUP screen calls the SWEEP SPACING screen. SWEEP SPACING: logarithmic linear done With linear selected the sweep changes the frequency at a linear rate; with logarithmic selected the sweep spends
  • Fluke 294-U | User Manual - Page 52
    291, 292, 294 Users Manual 6-6
  • Fluke 294-U | User Manual - Page 53
    External Trigger Input 7-2 Adjacent Channel Trigger Output 7-3 Triggered Burst 7-3 Trigger Source 7-4 Trigger Edge 7-4 Burst Count...7-4 Start Phase ...7-5 Manual Initialization of Inter-Channel Triggering 7-5 Gated mode ...7-6 Gate Source 7-6 Gate Polarity 7-6 Start Phase ...7-6 Sync Out in
  • Fluke 294-U | User Manual - Page 54
    291, 292, 294 Users Manual General Triggered burst and gated modes are selected from the MODE screen, called by the MODE key, as alternatives to the default continuous mode. MODE:
  • Fluke 294-U | User Manual - Page 55
    it becomes seq sync. To set the trigger out to anything other than its default it is necessary to change the mode from auto to manual using the mode soft key. Trigger out is an internal signal but, as with the other trigger sources, a positive-edged version is available at the
  • Fluke 294-U | User Manual - Page 56
    291, 292, 294 Users Manual screen on which the burst count and start phase are set. The other trigger parameters are set on the TRIGGER IN set-up screen called
  • Fluke 294-U | User Manual - Page 57
    a stable condition where all channels are waiting for a trigger and the sequence of triggered bursts never starts. To overcome this problem any channel can be triggered manually and independently using the force soft-key on that channel's TRIGGER IN screen. Select the channel to start the sequence
  • Fluke 294-U | User Manual - Page 58
    291, 292, 294 Users Manual Gated mode Gated mode is turned on with the gated soft key on the MODE screen. The setup... soft key on this screen accesses the
  • Fluke 294-U | User Manual - Page 59
    7 Triggered Burst and Gate Sync Out in Triggered Burst and Gated Modes The phase can be set with a precision of 0·1 ° but the actual resolution is limited with some waveforms and at certain waveform frequencies as detailed below. To indicate when this is the case the actual phase is shown in
  • Fluke 294-U | User Manual - Page 60
    291, 292, 294 Users Manual 7-8
  • Fluke 294-U | User Manual - Page 61
    Chapter 8 Tone Mode Title Page Introduction...8-2 Tone Frequency 8-2 Tone Type...8-2 Tone Switching Source 8-3 DTMF Testing With Two Sources 8-3 8-1
  • Fluke 294-U | User Manual - Page 62
    291, 292, 294 Users Manual Introduction In tone mode the output is stepped through a user-defined list of up to 16 frequencies under the control of the signal set by
  • Fluke 294-U | User Manual - Page 63
    8 Tone Mode Introduction there can be an off period between successive frequencies whilst the gate signal is not true. With type set to fsk the frequency changes instantaneously (and phasecontinuously) at each occurrence of the signal edge specified in the source and slope fields on the TRIGGER IN
  • Fluke 294-U | User Manual - Page 64
    291, 292, 294 Users Manual It is also possible to set up DTMF testing using two single channel instruments triggered by a common external signal and summed using the external SUM capability. 8-4
  • Fluke 294-U | User Manual - Page 65
    Chapter 9 Arbitrary Waveform Generation Title Page Introduction...9-2 Arbitrary Waveform Terms 9-2 Principles of Arbitrary Waveform Creation and Modification 9-2 Selecting and Outputting Arbitrary Waveforms 9-3 Creating New Waveforms 9-4 Create Blank Waveform 9-4 Create Waveform Copy 9-4
  • Fluke 294-U | User Manual - Page 66
    291, 292, 294 Users Manual Introduction Arbitrary (arb) waveforms are generated by sequentially addressing the RAM containing the waveform data with the arbitrary clock. The frequency of the arb waveform
  • Fluke 294-U | User Manual - Page 67
    9 Arbitrary Waveform Generation Selecting and Outputting Arbitrary Waveforms These steps are fully described in the Creating New Waveforms and Modifying Arbitrary Waveforms sections which follow. Waveform creation using waveform design software also consists of two steps: 1. Creating the waveform
  • Fluke 294-U | User Manual - Page 68
    291, 292, 294 Users Manual Creating New Waveforms Pressing the CREATE key calls the CREATE NEW WAVEFORM screen. CREATE NEW WAVEFORM create blank... create from copy... Create Blank Waveform Pressing
  • Fluke 294-U | User Manual - Page 69
    9 Arbitrary Waveform Generation Selecting and Outputting Arbitrary Waveforms The horizontal size of the waveform being copied does not have to be the same as the waveform being created. When the waveform is copied, by pressing the create soft key, the software compresses or expands the source
  • Fluke 294-U | User Manual - Page 70
    291, 292, 294 Users Manual Rename Waveform Pressing the rename... soft key on the MODIFY screen calls the Rename screen: Rename: WFM1 as: "WFM2 " cancel rename The new name can
  • Fluke 294-U | User Manual - Page 71
    9 Arbitrary Waveform Generation Selecting and Outputting Arbitrary Waveforms Edit Waveform Pressing the edit wfm... soft key calls the EDIT FUNCTIONS menu: EDIT FUNCTIONS: point edit... line draw... wave insert... This menu provides functions which permit the waveform to be edited point-by-point (
  • Fluke 294-U | User Manual - Page 72
    291, 292, 294 Users Manual default frm address is the first point on the waveform or the point most recently edited if point edit has been used. Set the from
  • Fluke 294-U | User Manual - Page 73
    9 Arbitrary Waveform Generation Selecting and Outputting Arbitrary Waveforms Press copy to implement the copy. During the two stage block copy process the screen displays the message processing file - please wait and shows a progress bar. During the first stage the block to be copied is created as a
  • Fluke 294-U | User Manual - Page 74
    291, 292, 294 Users Manual Waveform Offset Pressing the wave offset soft key initiates the creation of a temporary copy of the waveform to be edited and calls the WAVE OFFSET
  • Fluke 294-U | User Manual - Page 75
    9 Arbitrary Waveform Generation Arbitrary Waveform Sequence POSITION MARKER EDIT adrs: 0000000 patterns... exit clear all Position markers are output from SYNC OUT when the source (src) is set to pos'n marker on the SYNC OUTPUT SETUP screen. Position markers can be set at any or all of the
  • Fluke 294-U | User Manual - Page 76
    291, 292, 294 Users Manual Pressing the SEQUENCE key calls the initial SEQUENCE screen: SEQUENCE segs= 1 sequence setup... stop run A previously-defined sequence can be run and stopped from this
  • Fluke 294-U | User Manual - Page 77
    9 Arbitrary Waveform Generation Frequency and Amplitude Control with Arbitrary Waveforms chapter 7, Triggered Burst and Gate. At each trigger the current waveform cycle plus one further whole cycle are completed before the waveform of the next segment is started. If trig level is selected the
  • Fluke 294-U | User Manual - Page 78
    291, 292, 294 Users Manual on a single channel instrument, or ARB FREQUENCY: ext source: ext arb clk freq: 10.0000000kHz on a multi-channel instrument. It is then possible to select
  • Fluke 294-U | User Manual - Page 79
    time restarts the waveform from that level. If the ARB HOLD INPUT screen is currently selected the status field will change from no hold to manual hold while the waveform is paused. 9-15
  • Fluke 294-U | User Manual - Page 80
    291, 292, 294 Users Manual Output Filter Setting The output filter type is automatically the software selects the most appropriate filter. With the setting on auto the type can be changed manually but the choice will revert to the automatic selection as soon as any relevant parameter is changed.
  • Fluke 294-U | User Manual - Page 81
    Chapter 10 Pulse and Pulse-trains Title Page Introduction...10-2 Pulse Set-Up ...10-2 Pulse-Train Set-Up 10-4 Waveform Hold in Pulse and Pulse-Train Modes 10-8 10-1
  • Fluke 294-U | User Manual - Page 82
    291, 292, 294 Users Manual Introduction Pulse and pulse-trains are both selected and set-up from independent menus on the STANDARD WAVEFORMS screen called by pressing the STD key.
  • Fluke 294-U | User Manual - Page 83
    10 Pulse and Pulse-trains Pulse Set-Up waveform sync. Pressing the done soft key on this screen returns the display to the STANDARD WAVEFORMS screen. The means by which pulse period is set-up in the hardware requires an understanding because it affects the setting resolution of both pulse width and
  • Fluke 294-U | User Manual - Page 84
    291, 292, 294 Users Manual ARB CLOCK IN/OUT socket, or to the system clock on multi-channel instruments. To select external clock mode press the PULSE PERIOD soft key
  • Fluke 294-U | User Manual - Page 85
    10 Pulse and Pulse-trains Pulse-Train Set-Up Pressing next on any screen calls the next set-up screen, finally returning the display to the STANDARD WAVEFORMS screen from which pulse-train can be turned on and off. Pressing done returns the display directly to the STANDARD WAVEFORMS screen from any
  • Fluke 294-U | User Manual - Page 86
    291, 292, 294 Users Manual The pulse level can be set on this screen between -5·0 V and +5·0 V by direct keyboard entries or by using the rotary control. As with the baseline
  • Fluke 294-U | User Manual - Page 87
    10 Pulse and Pulse-trains Pulse-Train Set-Up generator, the individual pulse widths and delays are adjusted proportionally to the period as the period is changed. Period can also be changed from the PULSE-TRN PERIOD screen called by pressing the FREQ key with pulse-train mode selected: PULS-TRN PER
  • Fluke 294-U | User Manual - Page 88
    291, 292, 294 Users Manual Note that the pulse-train waveform will continue to run from the level. If the ARB HOLD INPUT screen is currently selected the status field will change from no hold to manual hold while the waveform is paused. A logic low or switch closure at the rear panel HOLD IN socket
  • Fluke 294-U | User Manual - Page 89
    Chapter 11 Modulation Title Page Introduction...11-2 External VCA 11-2 External SCM 11-3 Internal Modulation 11-3 11-1
  • Fluke 294-U | User Manual - Page 90
    291, 292, 294 Users Manual Introduction Both internal and external modulation can be selected. External modulation can be applied to any or all channels. Internal modulation uses the previous channel
  • Fluke 294-U | User Manual - Page 91
    if the waveform is clipping. Note that it is not possible to give a simple guide as to where the range breakpoints are because the use of dc offset, for fixed by SCM. Internal Modulation Only the multi-channel instruments (models 292 and 294) can make use of internal modulation; the single-channel
  • Fluke 294-U | User Manual - Page 92
    291, 292, 294 Users Manual Warnings are given when either a modulation depth or output amplitude change has caused clipping; the new setting is accepted but it must either be changed
  • Fluke 294-U | User Manual - Page 93
    Chapter 12 Sum Title Page Introduction...12-2 External Sum...12-2 Internal Sum...12-3 12-1
  • Fluke 294-U | User Manual - Page 94
    291, 292, 294 Users Manual Introduction Both internal and external Sum can be selected; summing can be to make adjustments if the waveform is clipped. Note that it is not possible to give a simple guide as to where the range breakpoints are because the use of dc offset, for example, changes these
  • Fluke 294-U | User Manual - Page 95
    12 Sum Internal Sum mid-range then the SUM signal needed to force the output to range maximum is halved to approximately 1 V p-p. To facilitate the setting of appropriate sum and amplitude levels the output amplitude of the selected channel can also be changed from the SUM set-up screen. Press the
  • Fluke 294-U | User Manual - Page 96
    291, 292, 294 Users Manual 12-4
  • Fluke 294-U | User Manual - Page 97
    Chapter 13 Synchronizing Title Page Introduction...13-2 Inter-Channel Synchronization 13-2 Synchronizing Principles 13-2 Master-Slave Allocation 13-2 Phase-Setting Between Channels 13-4 Other Synchronizing Considerations 13-4 Synchronizing two generators 13-5 Connections for Synchronization
  • Fluke 294-U | User Manual - Page 98
    291, 292, 294 Users Manual Introduction Two or more channels in one multi-channel generator can be synchronized together and precise phase differences can be set between the channels. Two
  • Fluke 294-U | User Manual - Page 99
    13 Synchronizing Inter-Channel Synchronization The mode soft-key can be used to select between independent, master, master/freq and slave; the default mode is independent. Only one master can be set; more than one master can be selected but when synchronization is turned on with the status soft-key
  • Fluke 294-U | User Manual - Page 100
    291, 292, 294 Users Manual Phase-Setting Between Channels The inter-channel set-up screen also has a field for setting up the phase of the slaves with respect to the
  • Fluke 294-U | User Manual - Page 101
    13 Synchronizing Synchronizing two generators • Pulse and pulse train waveforms will synchronize to other pulse and pulse-train waveforms (and with each other) but should be built with equal periods. • Arb waveforms should be the same length (although this is not forced and does not create an error
  • Fluke 294-U | User Manual - Page 102
    291, 292, 294 Users Manual Connections for Synchronization The clock connection arrangement is for the rear panel REF CLOCK IN/OUT of the master (which will be set to master)
  • Fluke 294-U | User Manual - Page 103
    13 Synchronizing Synchronizing two generators Hardware delays become increasingly significant as frequency increases, causing additional phase delay between the master and slave. However, these delays can be largely nulled out by 'backing off' the phase settings of the slave. Typically these
  • Fluke 294-U | User Manual - Page 104
    291, 292, 294 Users Manual 13-8
  • Fluke 294-U | User Manual - Page 105
    Chapter 14 Memory Card Title Page Introduction...14-2 Card Sizes and Formats 14-2 Formatting...14-3 Saving Files to a Memory Card 14-3 Avoiding Long Filenames 14-3 Storing and Recalling Set-Ups 14-3 Sorting Files...14-5 14-1
  • Fluke 294-U | User Manual - Page 106
    291, 292, 294 Users Manual Introduction Pressing the UTILITY key calls a list of menus which give modified on the instrument may be transferred to the PC. To install the card reader/writer follow the instructions supplied with it. For Windows ME, 2000, XP and later simply plug the device in to a
  • Fluke 294-U | User Manual - Page 107
    as it is entered and, as 8.3 filenames do not allow lower case, any lower case letter in a filename will produce a long filename. To avoid the problem in the above example it is necessary to save the file as WAVE.WFM. The Waveform Manager application supplied will ensure that all filenames are
  • Fluke 294-U | User Manual - Page 108
    291, 292, 294 Users Manual Pressing STORE (or store...) calls the screen: Save to store: "SETUP22 " execute A unique store name must be entered using the left and right cursor keys
  • Fluke 294-U | User Manual - Page 109
    14 Memory Card Sorting Files Sorting Files To make it easier to find a particular set-up in a long list it is recommended that the setups on the card are first sorted into alphabetical order using the sort dir... soft key on the MEMORY CARD screen: DIRECTORY SORT sort waveforms sort setups cancel
  • Fluke 294-U | User Manual - Page 110
    291, 292, 294 Users Manual 14-6
  • Fluke 294-U | User Manual - Page 111
    Chapter 15 System Operations from the Utility Menu Title Page Introduction...15-2 Channel Waveform Information 15-2 Warnings and Error Messages 15-2 Remote Interface Set-Up 15-2 SYS/REF Clock In/Out and System Clock Setting 15-2 Power On Setting 15-3 System Information 15-3 Calibration ...
  • Fluke 294-U | User Manual - Page 112
    291, 292, 294 Users Manual Introduction Pressing the UTILITY key calls a list of menus which points for further waveforms. This is useful when constructing a large sequence of many waveforms as a guide to the spare memory remaining. Warnings and Error Messages The default set-up is for all warning
  • Fluke 294-U | User Manual - Page 113
    15 System Operations from the Utility Menu Power On Setting The ARB CLOCK IN/OUT socket is set to input by setting sys clk to off and to an output by setting it to on. When sys clk is on (set to output) it is also used as the external clock when a channel is set to use an external arb clock. The
  • Fluke 294-U | User Manual - Page 114
    291, 292, 294 Users Manual Calibration Pressing calibration calls the calibration routine, as described in chapter 16, Calibration. Copying Channel Set-Ups An easy way of copying complete channel set-
  • Fluke 294-U | User Manual - Page 115
    Chapter 16 Calibration Title Page Introduction...16-2 Equipment Required 16-2 Calibration Procedure 16-2 Setting the Password 16-2 Password Access to Calibration 16-3 Changing the Password 16-3 Calibration Routine 16-3 Remote Calibration 16-6 16-1
  • Fluke 294-U | User Manual - Page 116
    291, 292, 294 Users Manual Introduction All parameters can be calibrated without opening the instrument case; the generator offers 'closed-box' calibration. All adjustments are made digitally with calibration constants
  • Fluke 294-U | User Manual - Page 117
    . Pressing tests... calls a menu of basic hardware checks used at production test; these are largely self-explanatory but details can be found in the Service Manual if required. At each step the display changes to prompt the user to adjust the rotary control or cursor keys, until the reading on the
  • Fluke 294-U | User Manual - Page 118
    291, 292, 294 Users Manual 16-4 The full procedure (for the 4-channel instrument) is as follows: CAL 03 CAL 04 CAL 05 CAL 06 CAL 07 CAL 08 CAL 09
  • Fluke 294-U | User Manual - Page 119
    16 Calibration Calibration Routine CAL 56 CAL 57 CAL 58 CAL 59 CAL 60 CAL 61 CAL 62 CAL 63 CAL 64 CAL 65 CAL 66 CAL 67 CAL 68 CAL 69 CAL 70 CAL 71 CAL 72 CAL 73 CAL 74 CAL 75 CAL 76 CAL 77 CAL 78 CAL 79 CAL 80 CAL 81 CAL 82 CAL 83 CAL 84 CAL 85 CAL 86 CAL 87 CAL 88 CAL 89 CAL 90 CAL 91 CAL 92 CAL
  • Fluke 294-U | User Manual - Page 120
    291, 292, 294 Users Manual CAL 111 CAL 112 CAL 113 CAL 114 CAL 115 CH4 Level a calibration program unique to this instrument. The remote calibration commands allow a simplified version of manual calibration to be performed by issuing commands from the controller. The controller must send the CALADJ
  • Fluke 294-U | User Manual - Page 121
    17-7 GPIB Parallel Poll 17-7 Status Reporting 17-8 Standard Event Status and Standard Event Status Enable Registers 17-8 Status Byte Register and Service Request Enable Register 17-9 Power-On Settings 17-10 Remote commands 17-10 RS232 Remote Command Formats 17-10 GPIB Remote Command Formats
  • Fluke 294-U | User Manual - Page 122
    291, 292, 294 Users Manual Introduction The instrument can be remotely controlled via its RS232, USB or GPIB interfaces. When using RS232 it can either be the only instrument connected
  • Fluke 294-U | User Manual - Page 123
    17 Remote Operation RS232 interface RS232 interface The 9-way D-type serial interface connector is located on the instrument rear panel. The pin connections are as shown in chapter 3, Connections. Single Instrument RS232 Connections For single instrument remote control only pins 2, 3 and 5 are
  • Fluke 294-U | User Manual - Page 124
    291, 292, 294 Users Manual 9-WAY D FEMALE DCD 1 9-WAY D MALE 1 RX 2 2 TX TX 3 3 RX DTR 4 4 GND 5 5 GND below 20H (space) are reserved for addressable RS232 interface control. In this manual 20H, etc. means 20 in hexadecimal Addressable RS232 Interface Control Codes All
  • Fluke 294-U | User Manual - Page 125
    suspend the output of a talker. The listener must send 11H (XON) before the talker will resume sending. This is the only form of handshake control supported by the addressable RS232 mode. 17-5
  • Fluke 294-U | User Manual - Page 126
    291, 292, 294 Users Manual Full List of Addressable RS232 Interface Control Codes 02H Set Addressable versions of Windows, including Win98 and 2000. Any driver updates are available via the Fluke web site, http://www.fluke.com. The CD-ROM also contains a .pdf file with information and details of
  • Fluke 294-U | User Manual - Page 127
    GPIB Subsets This instrument contains the following IEEE 488.1 subsets: Source Handshake SH1 Acceptor Handshake AH1 Talker T6 Listener L4 Service Request SR1 Remote Local RL1 Parallel Poll PP1 Device Clear DC1 Device Trigger DT1 Controller C0 Electrical Interface E2 GPIB IEEE
  • Fluke 294-U | User Manual - Page 128
    291, 292, 294 Users Manual The bits in the PPE command are as follows: bit 7 = bit 6 = bit 5 = bit 4 = bit 3 = bit 2 = bit 1 = bit 0 = x 1 1 0 sense ? ? ? don't care parallel poll enable sense of
  • Fluke 294-U | User Manual - Page 129
    > command and read by the *SRE? command. Bit 7 Not used. Bit 6 RQS/MSS. This bit, as defined by IEEE Std. 488.2, contains both the Requesting Service message and the Master Status Summary message. RQS is returned in response to a Serial Poll and MSS is returned in response to the *STB? command
  • Fluke 294-U | User Manual - Page 130
    291, 292, 294 Users Manual 17-10 Power-On Settings The following instrument status values are set at power-on: Status Byte Register = 0 Service Request Enable Register † = 0 Standard Event Status Register = 128 (pon bit set) Standard Event Status Enable Register † = 0 Execution Error
  • Fluke 294-U | User Manual - Page 131
    17 Remote Operation Remote commands The commands are not case-sensitive. GPIB Remote Command Formats GPIB input to the instrument is buffered in a 256 byte input queue which is filled, under interrupt, in a manner transparent to all other instrument operations. The queue contains raw (un-parsed)
  • Fluke 294-U | User Manual - Page 132
    291, 292, 294 Users Manual : a short mnemonic or string such as ON or OFF. A number in any format. For example, 12,
  • Fluke 294-U | User Manual - Page 133
    17 Remote Operation Remote commands Waveform Selection WAVE PULSPER PULSWID PULSDLY PULTRNLEN PULTRNPER PULTRNBASE PULTRNLEV , PULTRNWID , PULTRNDLY , PULTRNMAKE ARB ARBLIST? CF? CFSIZE? CFLABEL? Select the output
  • Fluke 294-U | User Manual - Page 134
    291, 292, 294 Users Manual ARBCLR ARBCREATE , ARBDEFCSV ,, ARBDEF ,, Delete the arb from channel memory. The
  • Fluke 294-U | User Manual - Page 135
    17 Remote Operation Remote commands Arbitrary Waveform Editing Care should be take to ensure that all channels in the instrument are running in CONTINUOUS mode before using commands from this section. Failure to observe this restriction may give unexpected results. ARBEDLMTS , Set the
  • Fluke 294-U | User Manual - Page 136
    291, 292, 294 Users Manual ARBDATACSV? ARBDATA? ARBRESIZE , ARBRENAME , ARBPOINT ,, ARBLINE ,, ,, ARBINSSTD ,, ,
  • Fluke 294-U | User Manual - Page 137
    17 Remote Operation Remote commands ARBCOPY ,, , ARBAMPL ,, , ARBOFFSET ,, , ARBINVERT ,, ARBLEN? POSNMKRCLR POSNMKRSET , POSNMKRRES , POSNMKRPAT ,,,
  • Fluke 294-U | User Manual - Page 138
    291, 292, 294 Users Manual Mode Commands MODE BSTCNT PHASE TONEEND TONEFREQ ,, SWPSTARTFRQ SWPSTOPFRQ SWPCENTFRQ SWPSPAN SWPTIME SWPTYPE <
  • Fluke 294-U | User Manual - Page 139
    Commands *CLS *ESE *ESE? *ESR? 17 Remote Operation Remote commands Force a trigger to the selected channel. Will function with any trigger source except MANUAL specified. Set the modulation source to , or . Set the modulation type to or . Set the depth for amplitude
  • Fluke 294-U | User Manual - Page 140
    291, 292, 294 Users Manual *IDN? *IST? *OPC *OPC? *PRE *PRE? *SRE *SRE? *STB? numeric format. The syntax of the response is . Set the Service Request Enable Register to . Returns the value of the Service Request Enable Register in numeric format. The Syntax of the
  • Fluke 294-U | User Manual - Page 141
    Miscellaneous Commands *LRN? LRN *RST *RCL *SAV *TRG COPYCHAN HOLD FILTER SYSCLKFRQ SYSCLKSRC BEEPMODE BEEP 17 Remote Operation Remote commands Returns the complete set up of the instrument as a hexadecimal character data block. To re
  • Fluke 294-U | User Manual - Page 142
    291, 292, 294 Users Manual 17-22 LOCAL Returns the instrument to local operation and unlocks instrument set up to the setup file named . Set the Service Request Enable Register to . Returns the value of the Service Request Enable Register in numeric format. Returns the value of
  • Fluke 294-U | User Manual - Page 143
    17 Remote Operation Remote Command Summary *TST? *WAI ABORT AMDEPTH AMPL AMPUNIT ARB ARBAMPL ,, , ARBCOPY ,, , ARBCREATE , ARBDATA , ARBDATA? ARBDATACSV , ARBDATACSV?
  • Fluke 294-U | User Manual - Page 144
    291, 292, 294 Users Manual 17-24 ARBINSSTD ,, , ARBINVERT ,, ARBLEN? ARBLINE ,, ,, ARBLIST? ARBOFFSET ,, ,
  • Fluke 294-U | User Manual - Page 145
    17 Remote Operation Remote Command Summary FORCETRG HOLD LOCKMODE LOCKSTAT LOCAL LRN MOD MODE MODTYPE OUTPUT PHASE POSNMKRCLR POSNMKRPAT , , POSNMKRRES , POSNMKRSET , PULSDLY
  • Fluke 294-U | User Manual - Page 146
    291, 292, 294 Users Manual PULTRNWID , QER? REFCLK SCMLEVEL SETUPCH SEQCNT , SEQSEG , SEQSTEP , SEQWFM , SUM SUMRATIO <
  • Fluke 294-U | User Manual - Page 147
    TONEFREQ ,, TRIGIN TRIGLEV TRIGOUT TRIGPER USBID? VCAIN WAVE WAVFREQ WAVPER WFMCLKSRC ZLOAD 17 Remote Operation Remote Command Summary Set tone frequency number to Hz. The third parameter sets the tone type
  • Fluke 294-U | User Manual - Page 148
    291, 292, 294 Users Manual 17-28
  • Fluke 294-U | User Manual - Page 149
    Chapter 18 Maintenance Introduction...18-2 Cleaning ...18-2 18-1
  • Fluke 294-U | User Manual - Page 150
    291, 292, 294 Users Manual Introduction The manufacturers or their agents overseas will provide a repair service for any unit developing a fault. Where owners wish to undertake their own maintenance work, this should only be done by skilled personnel in conjunction with the service manual. Cleaning
  • Fluke 294-U | User Manual - Page 151
    Appendices Appendix Title Page A AC Supply Voltage A-1 B Warning and Error Messages B-1 C SYNC OUT Automatic Settings C-1 D Factory System Defaults D-1 E Waveform Manager Plus E-1 F Block Diagrams F-1 G Front and Rear Panel Drawings G-1
  • Fluke 294-U | User Manual - Page 152
    291, 292, 294 Users Manual -2
  • Fluke 294-U | User Manual - Page 153
    Appendix A AC Supply Voltage Introduction Before connecting the instrument to an ac outlet, check that the instrument operating voltage marked on the rear panel is correct for the local supply. Warning To avoid the possibility of electric shock, always ensure the instrument is disconnected from the
  • Fluke 294-U | User Manual - Page 154
    291, 292, 294 Users Manual Figure 1-1. Mains transformer connections shc0003f.gif 5. To comply . 6. Change the fuse to one of the correct rating; see below. 2- and 4-channel instruments models 292 and 294 These instruments have a universal input range and will operate from a nominal 100 V, 115 V
  • Fluke 294-U | User Manual - Page 155
    Appendix B Warning and Error Messages Introduction Warning messages are given when a setting may not give the expected result, e.g. dc offset attenuated by the output attenuator when a small amplitude is set; the setting is, however, implemented. Error messages are given when an illegal setting is
  • Fluke 294-U | User Manual - Page 156
    291, 292, 294 Users Manual Error Messages 101 Frequency out of range for the selected waveform 102 Sample clock frequency required exceeds 100 MHz 103 Sample clock frequency required is
  • Fluke 294-U | User Manual - Page 157
    B Appendices Warning and Error Messages 182 Waveform is too long for the available channel memory 184 Sum or modulation conflict 186 Inter channel lock not possible. Lock status is off. This error may occur for several reasons. In each case there is a conflict of the synchronization settings. In
  • Fluke 294-U | User Manual - Page 158
    291, 292, 294 Users Manual 190 Memory card missing. Waveform not loaded 191 Set-up file CRITICAL STOP! Stack Overflow. 206 CRITICAL STOP! Stack Underflow. 207 CRITICAL STOP! Illegal instruction. 208 CRITICAL STOP! Illegal NMI. 209 CRITICAL STOP! Heap overflow. possible hardware failure
  • Fluke 294-U | User Manual - Page 159
    Appendix C SYNC OUT Automatic Settings Introduction The following automatic source (src) settings are made when auto mode is selected on the SYNC OUT screen. Waveform Position MODE WAVEFORM Sync Marker Standard 9 Continuous Arbitrary 9 Sequence Gate/Trig All Sweep All Tone All Ext.
  • Fluke 294-U | User Manual - Page 160
    291, 292, 294 Users Manual C-2
  • Fluke 294-U | User Manual - Page 161
    Appendix D Factory System Defaults Introduction The factory system defaults are listed in full below. They can be recalled by pressing RECALL followed by set defaults or by the remote command *RST. All channels will receive the same set-up. All channels default to the same settings. Main
  • Fluke 294-U | User Manual - Page 162
    291, 292, 294 Users Manual Sweep Parameters: Begin frequency: End frequency: Marker frequency: Direction: Spacing: Sweep time: Type: Filter Sync out Sequence Status: Wfm: Step on Count: Arbitrary 100 kHz
  • Fluke 294-U | User Manual - Page 163
    into other programs. Waveforms are displayed in fully scaleable windows and may be manipulated graphically. Any number of waveforms in any of the supported types may be displayed simultaneously. On-line help is available in three ways. 1. The help menu contains a contents option from which you can
  • Fluke 294-U | User Manual - Page 164
    291, 292, 294 Users Manual 2. Some dialog boxes have a Help button which, when clicked, will open the on-line help file at the section containing the description of that dialog
  • Fluke 294-U | User Manual - Page 165
    from Ch(n -1) Trigger out from Ch(n+1) Waveform end Trig in TRIGGERING Position marker Sequence end Burst done Trigger out to Ch(n-1) and Ch(n+1) Manual / remote trigger Internal lock in from this instrument Modulation in front panel BNC Sum in front panel BNC Mod/sum out from Ch(n-1) Ext
  • Fluke 294-U | User Manual - Page 166
    291, 292, 294 Users Manual Internal lock in Manual/remote trigger Internal trigger gen TRIG IN BNC SUM IN BNC MODULATION IN BNC Master clock EXT ARB CLOCK IN/OUT II IIII II IIII
  • Fluke 294-U | User Manual - Page 167
    Appendix G Front and Rear Panel Drawings Figure G-1. Model 291 Front Panel shc0014f.gif G-1
  • Fluke 294-U | User Manual - Page 168
    291, 292, 294 Users Manual Figure G-2. Model 292 Front Panel shc0015f.gif Figure G-3. Model 294 Front Panel shc0016f.gif G-2 Figure G-4. Model 291 Rear Panel shc0017f.gif
  • Fluke 294-U | User Manual - Page 169
    G Appendices Front and Rear Panel Drawings Figure G-5. Model 294 Rear Panel shc0018f.gif G-3
  • Fluke 294-U | User Manual - Page 170
    291, 292, 294 Users Manual G-4
  • Fluke 294-U | User Manual - Page 171
    -A- AC supply, 2-2 adding waveforms, 12-2 address, remote, 17-2 addressable RS232, 17-3, 17-4 adjacent channel trigger, 7-3 amplitude modulation, 1-9 arb clock in, 1-9, 3-4 arb clock out, 1-9 arb waveforms, 9-2 amplitude, 9-9, 9-15 block copy, 9-8 copying, 9-4, 9-8 creating, 9-4 editing, 9-7
  • Fluke 294-U | User Manual - Page 172
    -7 interface, 17-6 parallel poll, 17-7 remote commands, 17-11 status reporting, 17-8 -H- hold, 10-8 arb waveforms, 9-15 manual, 10-8 hold in, 1-9, 3-3 2 -I- IEEE-488, 1-11, 3-5 initial operation, 4-2 input arb clock, 1-9, 3-4 hold, 1-9, 3-3 modulation, 1-8, 3-3 ref clock, 1-9, 3-3 sum, 1-9, 3-3, 12
  • Fluke 294-U | User Manual - Page 173
    manual hold, 10-8 marker patterns, 9-11 master-slave, 13-2 memory card, 9-3 directories, out, 3-4 ref clock in/out, 1-9, 3-3 remote command summary, 17-22 remote/local operation, 17-2 repair service, 18-2 resolution pulse, 10-3 RS232, 1-11, 17-3 connector, 3-4 remote commands, 17-10 -S- screen
  • Fluke 294-U | User Manual - Page 174
    status model, 17-9 step on criterion, 9-12 sum, 12-2 sum in, 1-9, 3-3 supply cable, 2-2 supply voltage, 2-2 suppressed carrier modulation, 1-9 sweep connections, 6-2 duration, 6-4 marker, 6-5 mode, 1-6 principles, 6-2 spacing, 6-5 span, 6-3 sync, 3-2, 5-6 time, 6-3 type, 6-4 sync out, 3-2 arb
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®
291, 292, 294
100 MS/s Arbitrary Waveform Generators
Users Manual
March 2006
© 2006 Fluke Corporation, All rights reserved. Printed in USA
All product names are trademarks of their respective companies.