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Aim-TTI TG2511A, Инструкция по эксплуатации

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  26 

Pulse Generator 

General 

The pulse generator can produce a wide range of pulses with adjustable period, width, delay and 
edge speed. It may also be set in Gated or Burst mode, or modulated using PWM; for more 
information see the sections on Modulation and Burst. 

Each channel of a two channel instrument has an independent pulse generator. These may be set 
to any combination of period, width, delay and modulation or burst.  However, when the channels 
are linked by one of the dual-channel functions there are some restrictions between the parameters 
of the two channels; see the Dual-Channel Operations section of the Specification for details. 

Pressing the PULSE carrier waveform key will switch to the pulse waveform. The screen below 
shows the effect of pressing the PULSE key. 

 

 

 

 

 

 

 

 

The  

PlsFrq 

 soft-key allows setting of the pulse frequency. Pressing the key while it is 

highlighted will change it to  

PlsPrd

  and the pulse period may be entered. The pulse frequency 

may be changed in either of the ways detailed in General: Numeric Editing. The pulse generator 
uses its own value for pulse frequency/pulse period. Changing it will not affect the frequency/period 
value of the other carrier waveforms. 

Amplitude and dc offset are adjusted in the same way as for sinewaves and they may also be set in 
terms of high level and low level. These parameters may be changed in either of the ways detailed 
in General: Numeric Editing. 

Pressing the 

Params 

soft-key allows the pulse width, delay and edge times to be set as shown 

below. 

Pulse Width 

Pressing the  

Width

  soft-key shows the Width parameter in the Edit Box and the Graph Box 

changes to show that width is being edited. 

 

 

 

 

 

 

The Width may be changed in either of the ways detailed in General: Numeric Editing.  Pressing the 

Width 

 soft-key while it is highlighted will change it to  

Duty

  and the duty cycle may be changed 

in terms of the percentage of the pulse period. 

Содержание TG2511A

Страница 1: ...TG5011A TG2511A TG5012A TG2512A Function Arbitrary Generators INSTRUCTION MANUAL ...

Страница 2: ...70 Help Operations 78 Editing Arbitrary Waveforms 79 Synchronising Two Generators 83 Calibration 85 Remote Interface Operation 90 Remote Commands 97 Remote Commands Summary 105 Appendix 1 Information Warning and Error Messages 110 Appendix 2 Factory Default Settings 120 Appendix 3 Waveform Manager Plus V 4 Arbitrary Waveform Creation and Management Software 122 Maintenance 123 Note The latest revi...

Страница 3: ...can be accessed with a single key or two The knob or numeric keypad can be used to adjust frequency amplitude offset and other parameters Voltage values can be entered directly in Vpp Vrms dBm or as high and low levels Timing parameters can be entered in Hertz Hz or seconds Internal AM FM PM FSK BPSK SUM and PWM modulation make it easy to modulate waveforms without the need for a separate modulati...

Страница 4: ...supplied on CD Sine Frequency Range 1µHz to 50MHz 1µHz to 25MHz Frequency Resolution 1µHz 14 digits Output Level 10mVp p to 10Vp p into 50Ω Amplitude Flatness Relative to 1kHz 100kHz 0 1dB 5MHz 0 15dB 25MHz 0 3dB 50MHz 0 5dB Harmonic Distortion 1 Vp p 1Vp p DC to 20kHz 65dBc 65dBc 20kHz to 100kHz 60dBc 60dBc 100kHz to 1MHz 45dBc 45dBc 1MHz to 25MHz 40dBc 35dBc 25MHz to 50MHz 40dBc 28dBc Non Harmon...

Страница 5: ...400s 2µs min for period 400s Width Resolution 10ns for period 40s 100ns for period 40s and 400s 1µs for period 400s Delay Range 0ns to 2000s Delay Resolution 10ns for period 40s 100ns for period 40s and 400s 1µs for period 400s Arbitrary In built arbitrary waveforms Sinc Exponential Rise Logarithmic Rise and DC Up to 4 user defined waveforms may be stored in non volatile memory Waveforms can be de...

Страница 6: ...eference Initial Setting Error 2ppm Oscillator Ageing Rate 1ppm first year Temperature Stability 1ppm over the specified temperature range Modulation AM Carrier Waveforms Sine Square Ramp Arb PRBS Modulation Source Internal External Internal Modulating Waveforms Sine Square Up Ramp Down Ramp Triangle Noise DC Sinc Exponential Rise Logarithmic Rise and User Defined Arbs PRBS PN7 PN9 PN11 PN15 PN20 ...

Страница 7: ...ternal Modulating Waveforms Sine Square Up Ramp Down Ramp Triangle Noise DC Sinc Exponential Rise Logarithmic Rise and User Defined Arbs PRBS PN7 PN9 PN11 PN15 PN20 PN23 Internal Modulating Frequency 1µHz to 1MHz 1µHz resolution Pulse Width Deviation 0 to 100 of pulse width resolution same as of pulse width FSK Carrier Waveforms Sine Square Ramp Arb PRBS Source Internal External via TRIG IN Intern...

Страница 8: ... external Gate Signal Source Internal from keyboard trigger generator or other channel External from TRIG IN or remote interface Gate Start Stop Phase 360 0 to 360 0 degrees 0 1 degree resolution subject to carrier waveform Sweep Frequency sweep capability is provided for both standard and arbitrary waveforms Carrier Waveforms All standard and arbitrary except pulse Sweep Mode Linear or logarithmi...

Страница 9: ...coupled Changing the amplitude and offset on one channel changes the amplitude and offset of both channels Output coupling Output On Off can be coupled Switching the output On Off on one channel switches the output On Off of both channels Characteristics Relative phase 360 to 360 degrees 0 1 degree resolution Phase offset cannot be set for Pulse Noise and PRBS waveforms Channel to channel Skew typ...

Страница 10: ...TL high when the first point of the waveform is output Noise No sync associated with noise PRBS A positive pulse which is 1 PRBS bit rate wide at the beginning of the PRBS sequence Modulation Sync AM FM PM PWM SUM A square wave with 50 duty cycle referenced to the internal modulation waveform when modulation source is internal or a square wave referenced to the carrier waveform when modulation sou...

Страница 11: ...ing edge or low falling edge Input Impedance 10kΩ External Modulation Input for AM FM PM PWM Voltage Range 5V full scale Input Impedance 5kΩ typical Bandwidth DC to 20kHz Ref Clock Input Input for an external 10MHz reference clock Voltage Range 1Vpp 5Vpp Maximum Voltage 5V Minimum Voltage 1V Phase Synchronising Two Generators Two generators can be synchronised together to provide outputs at the sa...

Страница 12: ... by rotary control Stored Settings Up to 9 complete instrument set ups may be stored and recalled from non volatile memory Size Bench Top TG2511A TG5011A 97mm H x 250mm W x 270mm L TG2512A TG5012A 97mm H x 250mm W x 295mm L Rack mount TG2511A TG5011A 86 5mm 2U x 213 5mm rack width x 244mm L TG2512A TG5012A 86 5mm 2U x 213 5mm rack width x 269mm L Weight TG2511A TG5011A 2 55kg TG2512A TG5012A 2 7kg...

Страница 13: ... and opening the covers or removal of parts except those to which access can be gained by hand is likely to expose live parts The apparatus shall be disconnected from all voltage sources before it is opened for any adjustment replacement maintenance or repair Any adjustment maintenance and repair of the opened instrument under voltage shall be avoided as far as possible and if inevitable shall be ...

Страница 14: ...ument is suitable both for bench use and rack mounting It is delivered with soft protective front and rear bezels which have integral moulded feet this is the most suitable configuration for bench use For rack mounting the protective bezels and handle stand can be removed such that the instrument can be fitted beside any other standard 2U half rack instrument in a 19 rack A suitable 2U 19 rack kit...

Страница 15: ... Sync AM FM PM PWM SUM A square wave with 50 duty cycle referenced to the internal modulation waveform when modulation source is internal or a square wave referenced to the carrier waveform when modulation source is external No sync is associated with noise as the modulation source FSK A square wave referenced to the trigger rate The sync is a TTL high when hop frequency is the output frequency an...

Страница 16: ...which is the master Do not apply an external voltage exceeding 10V LAN The LAN interface is designed to meet LXI Lan eXtensions for Instrumentation Core 2011 Remote control using the LAN interface is possible using the TCP IP Socket protocol The instrument also contains a basic Web server which provides information on the unit and allows it to be configured Since it is possible to misconfigure the...

Страница 17: ... how to change the power up settings to either those at power down or to the defaults Change the basic generator parameters as described in the Continuous Carrier Waveform Operation section and switch the output on with the OUTPUT key the key will glow green to show that the output is on Keyboard The front panel contains the liquid crystal display LCD and the keyboard which are used together to co...

Страница 18: ...6 x 112 pixel backlit liquid crystal display LCD The most common type of display layout is shown below The Status Line indicates the status of the instrument as follows The field is blank on a single channel instrument On a dual channel instrument it indicates which channel is currently selected for editing As shown above channel 1 is selected If the channels are Tracking the field will change to ...

Страница 19: ...x may also appear to provide error or warning messages or to give other information to the user See Appendix 1 Information Warning and Error Messages for a full list of messages Editing Principles The instrument parameters are edited using the keyboard in conjunction with the Soft key Labels and the Edit Box Generally the required parameter is selected by pressing waveform keys modulation keys or ...

Страница 20: ...meter will be displayed with an inverse edit cursor over one of the digits The left and right cursor keys may be used to move the edit cursor to any digit in the value Values are always shown with enough digits to the right of the decimal point to show the best resolution for the parameter For example the right most digit in a frequency value will be µHz Depending on the actual value one or more d...

Страница 21: ...r if the output is on indicated by the OUTPUT key glowing green If the output is not on press the OUTPUT key twice followed by the RAMP key The screen below shows the effect of pressing the RAMP key The RAMP key now glows green the FCN field in the Parameters Box shows Ramp and the Graph Box has changed to show the ramp waveform Frequency The frequency may be changed in either of the ways detailed...

Страница 22: ...shows the dc offset parameter in the Edit Box and the Graph Box changes to show that offset is being edited The offset may be changed in either of the ways detailed in General Numeric Editing During a new offset entry the key can be used at any time to set a negative offset alternate presses toggle the sign between and High Level and Low Level The instrument allows the amplitude and offset paramet...

Страница 23: ...lected waveform pressing the Duty soft key shows the duty cycle parameter in the Edit Box and the Graph Box changes to show that duty cycle is being edited The duty cycle may be changed in either of the ways detailed in General Numeric Editing Ramp Symmetry With ramp as the selected waveform pressing the Symm soft key shows the symmetry parameter in the Edit Box and the Graph Box changes to show t...

Страница 24: ...the Params soft key switches to the Arb Params menu Press the Load soft key to enter tha Arb Load menu This shows the name of the selected arb in the Edit Box and the Graph Box shows the arb waveform The soft keys allow access to all the arbitrary waveforms in the instrument BuiltIn1 and BuiltIn2 allow access to seven fixed waveforms which are built into the instrument and may be used like any oth...

Страница 25: ... arb being edited The original waveform will be output on exit from the edit menu It is not possible to enter edit mode if modulation sweep or burst are selected The selected waveform is edited by pressing the Edit soft key For a full description of the editing capabilities see the Editing Arbitrary Waveforms section Sync Output SYNC OUT is a multifunction LVTTL level output that can be automatica...

Страница 26: ...parameter setting is left unchanged Examples are 1 Entering a frequency of 2MHz for a ramp waveform The error message Frequency invalid Upper limit 1MHz is shown 2 Entering a sinewave amplitude of 25Vpp The error message Amplitude invalid Upper limit 10 000 Vpp is shown 3 Entering a DC offset of 20V on a sinewave with an amplitude of 1 000 Vpp The error message Offset invalid Upper limit 4 500 Vdc...

Страница 27: ...key while it is highlighted will change it to PlsPrd and the pulse period may be entered The pulse frequency may be changed in either of the ways detailed in General Numeric Editing The pulse generator uses its own value for pulse frequency pulse period Changing it will not affect the frequency period value of the other carrier waveforms Amplitude and dc offset are adjusted in the same way as for ...

Страница 28: ... for more details of Burst and Gate modes The delay also changes the relative timings of the pulses in dual channel modes Rise Time and Fall Time Pressing the Edge soft key shows the edge parameter in the Edit Box and the Graph Box changes to show that edge is being edited The soft keys also change to present more options for editing the edge times of the pulse The selected edge time may be change...

Страница 29: ...times must use the same range Choose the range by pressing the appropriate soft key When using the coupled option the range will change automatically as the edge times are edited Press the Execute soft key to set the selected range and return to the previous menu or press the soft key to return without changing the range ...

Страница 30: ...edited The amplitude or dc offset may be changed in either of the ways detailed in General Numeric Editing It is also possible to edit these parameters in terms of high level and low level Pressing the Type soft key shows the following and allows the PRBS function to be selected See the PRBS section for more information on editing PRBS waveforms Noise Modulation Noise may be used as a modulation s...

Страница 31: ...ws NOISE in the top right corner and two extra soft key labels appear NseLvl and WfmLvl Pressing the NseLvl key allows the noise percentage to be set Pressing the WfmLvl key allows the Waveform percentage to be set These parameters may be changed in either of the ways detailed in General Numeric Editing Using the two parameters the ratio may be set anywhere in the range 50 waveform and 50 noise to...

Страница 32: ... PRBS Pressing the Noise PRBS key will switch to the Noise PRBS function and show the screen below Pressing the Type soft key shows the following and allows the PRBS function to be selected The soft key indicates that there are too many options to show all at once so press this key to show more In this case there is one more list of types which will show when the soft key is pressed One more press...

Страница 33: ...g Use the Ampl and Offset soft keys to set these parameters as for any other carrier wave The Edge soft key will allow the rise and fall time to be set Note that the edges are always coupled and will be adjusted together Modulation PRBS may be modulated or used as a modulation shape in the same way as sine or ramp etc See the Modulation section for more information ...

Страница 34: ...ssing the MOD key when Sine is the selected waveform and the selected modulation type is AM The Parameters Box now shows the current modulation parameters of MODFRQ DEPTH and SHAPE and AM is shown in the FCN field The Graph Box shows the modulating waveform below a representation of the modulated carrier waveform The Edit Box contains the selected parameter in this case modulation Source To change...

Страница 35: ... to the top level modulation menu To select the modulation source press the Source soft key The options are Internal or External Internal will use the waveform specified in the shape parameter and the Graph Box will show that shape as the modulating waveform External will use the signal present at the MOD IN connector and the Freq and Shape soft keys will disappear The Graph Box will always show a...

Страница 36: ...edited The frequency may be changed in either of the ways detailed in General Numeric Editing To set the modulation shape press the Shape soft key The currently selected shape will appear in the Edit Box and the soft keys will change to a list of shapes available The soft key indicates that there are too many options to show all at once so press this key to show more In this case there are four mo...

Страница 37: ...ent all of the modulation types which may be applied to the selected carrier waveform If FM is not already selected press the FM soft key followed by the Done key to return to the top level modulation menu To select the modulation source press the Source soft key The options are Internal or External Internal will use the waveform specified in the shape parameter and the Graph Box will show that sh...

Страница 38: ...ted The frequency may be changed in either of the ways detailed in General Numeric Editing To set the modulation shape press the Shape soft key The currently selected shape will appear in the Edit Box and the soft keys will change to a list of shapes available The soft key indicates that there are too many options to show all at once so press this key to show more In this case there are four more ...

Страница 39: ...ll the parameters for FM are now set PM To select PM press the MOD key to turn on modulation and then press the Type soft key to show the display below The soft key indicates that there are too many options to show all at once so press this key to show more In this case there is one more list of types which will show when the soft key is pressed One more press of the soft key will show the first l...

Страница 40: ...inewave as the modulating waveform if the source is set to External To set the phase deviation press the Deviatn soft key The deviation parameter will appear in the Edit Box and the modulating waveform in the Graph Box will show that deviation is being edited The deviation may be changed in either of the ways detailed in General Numeric Editing To set the modulation frequency press the Freq soft k...

Страница 41: ...sive presses of the soft key One more press of the soft key will show the first list again Select the modulation shape required by pressing the appropriate key then press the Done soft key to return to the top level modulation menu All the parameters for PM are now set SUM To select SUM press the MOD key to turn on modulation and then press the Type soft key to show the display below ...

Страница 42: ...he waveform specified in the shape parameter and the Graph Box will show that shape as the modulating waveform External will use the signal present at the MOD IN connector and the Freq and Shape soft keys will disappear The Graph Box will always show a sinewave as the modulating waveform if the source is set to External To set the modulation Level press the ModLvl soft key The parameter will appea...

Страница 43: ...able The soft key indicates that there are too many options to show all at once so press this key to show more In this case there are four more lists of shapes which will show with successive presses of the soft key One more press of the soft key will show the first list again Select the modulation shape required by pressing the appropriate key then press the Done soft key to return to the top lev...

Страница 44: ...l will use the signal present at the MOD IN connector and the Freq and Shape soft keys will disappear The Graph Box will always show a sinewave as the modulating waveform if the source is set to external To set the pulse width deviation press the Deviatn soft key The deviation parameter will appear in the Edit Box and the modulating waveform in the Graph Box will show that deviation is being edite...

Страница 45: ...able The soft key indicates that there are too many options to show all at once so press this key to show more In this case there are four more lists of shapes which will show with successive presses of the soft key One more press of the soft key will show the first list again Select the modulation shape required by pressing the appropriate key then press the Done soft key to return to the top lev...

Страница 46: ...to return to the top level modulation menu To select the modulation source press the Source soft key The options are Internal or External Internal will use an internally generated trigger signal external will use the signal present at the TRIG IN connector and the Rate soft key will disappear The Graph Box will show a switching carrier and a square wave as the modulating waveform irrespective of t...

Страница 47: ...eric Editing To set which level of the switching signal will output the hop frequency press the Slope soft key The currently selected slope will appear in the Edit Box The options are Positive or Negative Setting positive will cause FSK to generate the hop frequency while the switching signal is high and the carrier frequency while the switching signal is low Setting negative will cause FSK to gen...

Страница 48: ...s not already selected press the BPSK soft key followed by the Done key to return to the top level modulation menu To select the modulation source press the Source soft key Internal will use an internally generated trigger signal external will use the signal present at the TRIG IN connector and the Rate soft key will disappear The Graph Box will show a switching carrier and a square wave as the mo...

Страница 49: ...l Numeric Editing To set which level of the switching signal will output the BSPK phase press the Slope soft key The currently selected slope will appear in the Edit Box The options are Positive or Negative Setting positive will cause BSPK to generate the BSPK Phase while the switching signal is high and the carrier phase while the switching signal is low Setting negative will cause BPSK to genera...

Страница 50: ... FCN field The TIME field also shows the sweep type The Graph Box shows the sweep waveform type below a representation of the swept carrier waveform The Edit Box contains the selected parameter in this case start frequency To change the carrier waveform parameters press the highlighted carrier waveform key which will return the display to the carrier menu as shown below Notice that Swp still shows...

Страница 51: ...own sweeps With any of the Lin types selected the sweep changes the frequency at a linear rate with log types selected the sweep spends an equal time in each frequency decade The up arrows indicate a sweep from start frequency to stop frequency The down arrows indicate a sweep from stop frequency to start frequency Start and Stop Frequency To set the start or stop frequency press the Start or Stop...

Страница 52: ...e To set the sweep time press the Time soft key The time parameter will appear in the Edit Box and the Graph Box will show that sweep time is being edited The sweep time may be changed in either of the ways detailed in General Numeric Editing Frequency Marker The sweep frequency marker may be set to any frequency within the sweep range or it may be turned off The sweep marker and the sweep sync fo...

Страница 53: ...y To set the mode press the Mode soft key The mode parameter will appear in the Edit Box The default mode is Continuous Sweep In this mode the sweep will proceed to the end and immediately start again with no pause This is shown in the Graph Box by the sweep type waveform restarting immediately Pressing the mode soft key will select the trigger which is currently selected in the Trigger menu see t...

Страница 54: ...53 Pressing the Mode soft key again while it is highlighted will return to continuous mode All the parameters for sweep are now set ...

Страница 55: ...burst can be internal from the trigger generator the other channel external from the TRIG IN connector or manual by pressing the TRIGGER key Pressing the BURST key will apply the currently selected burst parameters to the currently selected carrier waveform and the BURST key will glow yellow The screen below shows the effect of pressing the BURST key when sine is the selected waveform The Paramete...

Страница 56: ... key The count may be changed in either of the ways detailed in Numeric Editing Principles The carrier waveform in the Graph Box will show a representation of the burst as the count is edited Burst Phase To set the carrier start phase press the Phase soft key The phase parameter will appear in the Edit Box The phase may be changed in either of the ways detailed in General Numeric Editing The carri...

Страница 57: ...e Dual Ch soft key the options accessed via the other soft keys are described in the Utility Menu section Pressing the Dual Ch soft key gives access to the dual channel capabilities of the instrument This menu is not available on a single channel instrument Display Presentation Pressing the Display soft key will cycle through the possible options These options present the instrument parameters in ...

Страница 58: ...arameters on one channel do not affect the other channel When Tracking is On any parameter change is applied to both channels It is not possible to switch between channels with the Ch1 2 key While tracking is selected or is shown in place of the normal Ch1 Ch2 indicator The channels can be set to track exactly by pressing the Equal soft key or Channel 2 may be inverted by pressing the Inverse soft...

Страница 59: ...Ratio CH2 Freq CH1 Freq Offset applies a fixed difference between the channels which is equal to Channel 2 frequency Channel 1 frequency Ratio sets the frequencies so that Ratio is equal to Channel 2 frequency divided by Channel 1 frequency The selected type of frequency coupling will show either an Offset soft key or a Ratio soft key to allow the respective value to be set These numeric values ma...

Страница 60: ...ger Outout Internal Trigger also has Slope and Period keys External Trigger and Channel 2 Trigger Output have only a Slope key and Manual Trigger has no additional keys The Slope key selects between Positive Slope and Negative Slope The trigger waveform in the Graph Box changes to show the edge in use Pressing the Period soft key allows the period of the internal trigger generator to be set The Ed...

Страница 61: ... current waveform type and modulation Carrier Referenced The carrier sync signal Modulation Referenced The modulating waveform sync signal Sweep Referenced The sweep sync signal also containing the marker information Burst Referenced The burst sync which is high during a burst Current Trigger The trigger input signal to the channel Off No signal is generated Press The Done soft key to exit the Tri...

Страница 62: ...he first list again The soft keys present all of the output parameters which may be edited for the selected output channel Output On Off Pressing the On Off soft key will turn the output on and off When the output is on the Output key will glow yellow Sync Output Pressing the Sync key shows the Sync Output menu which controls the signal at the SYNC OUT connector Pressing the Sync soft key alternat...

Страница 63: ...form Available for all waveforms except noise Modulation Sync A square wave at the same frequency as the internal modulation waveform with a duty of 50 Not available for external modulation Sweep Sync Outputs the sweep trigger and sweep marker signals Burst Sync A square wave coincident with a burst output Trigger A buffered version of the Trigger signal Output Type Pressing the Type soft key on t...

Страница 64: ...eld and the amplitude vernier range is no longer limited This can be useful in eliminating momentary disruptions in the output waveform in Auto mode caused by the switching of the attenuators while changing the amplitude around an attenuator change point However waveform quality will start to deteriorate when the optimium 10dB operating range of the amplitude vernier is exceeded With range set to ...

Страница 65: ...xtra soft key labels appear NseLvl and WfmLvl Pressing the NseLvl soft key allows the Noise percentage to be set Pressing the WfmLvl soft key allows the Waveform percentage to be set These parameters may be changed in either of the ways detailed in General Numeric Editing Using the two parameters the ratio may be set anywhere in the range 50 waveform and 50 noise to 99 waveform and 1 noise Press t...

Страница 66: ...lities of the instrument See the Dual Channel Operation section for full details of these capabilities This menu is not available on a single channel instrument System Pressing the System soft key gives control of some system level functions Power On State Pressing the PwrOn soft key will alternate between Power On Default and Power On Latest With Power On Default selected the instrument will powe...

Страница 67: ... the display contrast to be adjusted The parameter may be changed in either of the ways detailed in General Numeric Editing Pressing the Bright soft key allows the display backlight brightness to be adjusted The parameter may be changed in either of the ways detailed in General Numeric Editing Pressing the Invert soft key will alternately set the display between black on white the default and whit...

Страница 68: ...nged in groups of three with the groups separated by a space Pressing the No soft key will change to no format In no format digits after the decimal point are not grouped Press the soft key to return to the top level system menu or press the UTILITY key to exit the utility menus Reference Clock Control Pressing the RefClk soft key will show the reference clock selection menu Pressing the Source so...

Страница 69: ...will use it and pop up the message External clock detected Generator running on external clock If a noisy or otherwise out of specification signal is present at the 10MHz REF IN connector the instrument may alternate between the two messages Pressing the LokTyp soft key gives access to the multi instrument synchronising capabilities of the instrument See the Synchronising Two Generators section fo...

Страница 70: ...lled interfaces See the Remote Control section for full details of the use of the interfaces Help This soft key gives access to the Help menu which is explained in the Help Operations section The key is not available on a single channel instrument where help is accessed directly from the HELP key on the keyboard ...

Страница 71: ...t be tampered with as they are checked by the firmware during use and if corrupt could render the instrument non functional After a successful update it is safe to delete the files in this folder This option is offered by the boot loader code in the instrument The instrument is able to read and write flash drives formatted FAT16 or FAT32 The instrument does not generate or use long filenames A fil...

Страница 72: ...selection arrow is in the Disk Box the key will be labelled Local The file selection arrows are moved by first selecting the required box as above A file is then selected by turning the KNOB until the selection arrow is next to the required filename If there are more files than will fit on the screen the list will scroll when the arrow reaches the top or bottom of the box Operations on Set up File...

Страница 73: ...py soft key will then show the following The Copy from Box shows that the source is Local and shows the file to be copied The Copy to Box shows the file that will be written to Disk The Edit Box shows the name of the file that will be written and the soft key labels KNOB and cursor keys allow the name to be edited The DelChar key allows characters to be deleted from either end of the name but not ...

Страница 74: ...show the following The Copy from Box shows that the source is Disk and shows the file to be copied The Copy to Box shows the file that will be written to the Local store The Edit Box shows the name of the file that will be written and the soft key labels KNOB and cursor keys allow the name to be edited The DelChar key allows characters to be deleted from either end of the name but not from the cen...

Страница 75: ... Cancel key cancels the save operation and returns to the top level Stores menu The Execute soft key starts the save operation and returns to the top level Stores menu when complete The cursor keys will move the edit cursor through the name and turning the KNOB will cycle through all valid characters numbers and symbols Recall The recall operation allows the current instrument set up to be replace...

Страница 76: ...es as shown by the soft key labels Copy and Delete The copy operation will not be available if no USB flash drive is attached Copy The copy operation allows waveform files to be copied between local storage and an attached USB flash drive To copy a file from local to disk 1 Select the Local Box by pressing the Local soft key 2 Select the file to be copied 3 Press the Copy soft key 4 Optionally mod...

Страница 77: ... to the top level Stores menu when complete The cursor keys will move the edit cursor through the name and turning the KNOB will cycle through all valid characters numbers and symbols To copy a file from disk to local 1 Select the Local Box by pressing the Local soft key 2 Select the local store to receive the file from disk 3 Select the Disk Box by pressing the Disk soft key 4 Select the file to ...

Страница 78: ...t from the centre The Default soft key displays the name of the source file again The Cancel key cancels the copy operation and returns to the top level Stores menu The Execute soft key starts the copy operation and returns to the top level Stores menu when complete The cursor keys will move the edit cursor through the name and turning the KNOB will cycle through all valid characters numbers and s...

Страница 79: ...en from which help was initiated Press the soft key to exit from Help on a dual channel instrument The following sections discuss these two screen types Help menu Pressing the HELP key will display the Help menu The Help menu uses all the screen space between the Status Line and the Soft key Labels and contains a list of help topics To show a topic use the and soft keys to move the highlight back ...

Страница 80: ...le editing an arbitrary waveform it will be available at the MAIN OUT connector of the selected channel for display on an oscilloscope There is also a representation shown in the Graph Box and the FCN field in the Parameters Box shows Edit ARBNAME as a reminder that this waveform is temporarily selected for output Editing an Arbitrary waveform There are five editing options for arbitrary waveforms...

Страница 81: ...simply dropped to achieve the new length Pressing the Resize soft key will show the resize menu in the Edit Box and the soft keys will show the resize options The No Pts soft key allows the new size to be specified The number of points may be changed in either of the ways detailed in General Numeric Editing Press the Execute soft key to resize the waveform and return to the top level edit menu Pre...

Страница 82: ...g the Line soft key shows the line edit menu in the Edit Box The Line edit menu allows a line to be drawn between any two points in the waveform The end points of the line may be set to any vertical level value The PointA soft key selects setting of the first point number pressing the ValueA soft key then enables the value to be changed The PointB and ValueB soft keys are use to set the second poi...

Страница 83: ...ace soft key enters a space character at the cursor position The soft key cancels the operation and returns to the top level edit menu The Execute soft key changes the name and returns to the top level edit menu when complete The cursor keys will move the edit cursor through the name and turning the KNOB will cycle through all valid characters numbers and symbols ...

Страница 84: ...larly the synchronising connection is from the SYNC OUT of the master to the TRIG IN input of the slave It is also possible for the master instrument to have its 10MHz REF IN driven from a frequency reference during synchronisation Generator Set ups Each generator can have its main parameters set to any value and each generator can be set to any waveform except noise The master is set as follows P...

Страница 85: ... respect to the master and a negative setting delays the slave generator Phase changes on either generator will not cause a loss of synchronisation Hardware delays become increasingly significant as the 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 Resynchronising If the ...

Страница 86: ...th of at least 100MHz Calibration Procedure Pressing the UTILITY key followed by the Calib soft key shows the opening screen for instrument calibration The software provides for a 4 digit password in the range 0000 to 9999 to be used to access the calibration procedure If the password is left at the factory default of 0000 no messages are shown and calibration can proceed as described in the Calib...

Страница 87: ...ry but details can be found in the Service Manual if required At each calibration step the display changes to prompt the user to adjust the KNOB or cursor keys until the reading on the specified instrument is at the value given The cursor keys provide coarse adjustment and the KNOB fine adjustment Pressing increments the procedure to the next step pressing decrements back to the previous step Pres...

Страница 88: ...gh level Adjust for 10V 10mV STEP 29 CH1 Square wave low level Adjust for 10V 10mV STEP 30 CH1 Rise time 0 Adjust for 50ns STEP 31 CH1 Rise time 0 Adjust for 100ns STEP 32 CH1 Rise time 1 Adjust for 100ns STEP 33 CH1 Rise time 1 Adjust for 2us STEP 34 CH1 Rise time 2 Adjust for 2us STEP 35 CH1 Rise time 2 Adjust for 40us STEP 36 CH1 Fall time 0 Adjust for 50ns STEP 37 CH1 Fall time 0 Adjust for 10...

Страница 89: ... 15MHz Adjust for same reading STEP 66 CH2 Level 20MHz Adjust for same reading STEP 67 CH2 Level 25MHz Adjust for same reading STEP 68 CH2 Level 30MHz Adjust for same reading STEP 69 CH2 Level 35MHz Adjust for same reading STEP 70 CH2 Level 40MHz Adjust for same reading STEP 71 CH2 Level 43MHz Adjust for same reading STEP 72 CH2 Level 45MHz Adjust for same reading STEP 73 CH2 Level 47MHz Adjust fo...

Страница 90: ...d it is the controllers responsibility to ensure that everything progresses in an orderly way Only the following commands should be used during calibration WARNING Using any other commands while in calibration mode may give unpredictable results and could cause the instrument to lock up requiring the power to be cycled to regain control CALIBRATION cpd nr1 The calibration control command cpd can b...

Страница 91: ...e default is for all available interfaces to be enabled as shown The REM IF softkey may be used to select the interfaces required Pressing the REM IF key will cycle round the possibilities in this case Enabled TCP USB Enabled TCP only and Enabled USB Only TCP is used instead of LAN because the LAN itself is not disabled and could still be used to access the instrument web server Disabling TCP does...

Страница 92: ...ns in exactly the same way as a standard COM port except that the Baud rate setting of the virtual COM port is ignored The driver will remain installed on the PC so that the establishment of a virtual COM port is done automatically each time the instrument is connected to the PC via USB in the future Further virtual COM ports are created for each additional instrument connected to the PC via USB E...

Страница 93: ...et the password The password can be up to 15 characters long The password will however be reset to the default no password if the front panel is used to reset all the LAN parameters to their factory default The web pages also have an Identify function which allows the user to send an identifying command to the instrument which causes its display to flash until the command is cancelled ICMP Ping Se...

Страница 94: ...ion The LAN field in the Status Line can show multiple status indications When there is no LAN connection for example no cable connected the field will show While the system is attempting to connect the icon will flash When successfully connected with remote control enabled the field will show If connected but remote control is disabled it will show Finally an unsuccessful attempt to connect will ...

Страница 95: ...lue of ist is 0 otherwise the value of ist is 1 The instrument must also be configured so that the value of ist can be returned to the controller during a parallel poll operation The instrument is configured by the controller sending a Parallel Poll Configure command PPC followed by a Parallel Poll Enable command PPE The bits in the PPE command are shown below bit 7 X don t care bit 6 1 bit 5 1 Pa...

Страница 96: ...s register contains a number representing the last error encountered over the current interface The Execution Error Register is read and cleared using the EER command On power up this register is set to 0 for all interface instances Status Byte Register and Service Request Enable Register These two registers are implemented as required by the IEEE STD 488 2 Any bits set in the Status Byte Register...

Страница 97: ...to the GPIB section of the instrument and are of limited use via other interfaces The instrument will be in local state with the front panel controls active The instrument parameters at power on are always the same as at last switch off with the exception of the output status By default the output is always off at power on but the user may change this from the front panel to be the same at power o...

Страница 98: ... which is taken by the parser as required Commands and queries are executed in order and the parser will not start a new command until any previous command or query is complete There is no output queue which means that the response formatter will wait indefinitely if necessary until the instrument is addressed to talk and the complete response message has been sent before the parser is allowed to ...

Страница 99: ... will function when used on the other interfaces but some may be of little use The Operation Complete bit bit 0 in the Standard Event Status Register is only ever set by the OPC command The OPC or the OPC command can be used for device synchronisation due to the sequential nature of remote operations Channel Selection Most commands act on a particular channel of the generator The following command...

Страница 100: ...nrf sec Value zero sets to the minimum value allowed PULSRANGE cpd Set the pulse rise and fall range to 1 2 or 3 1 sets the range from 5ns to 99 9ns 2 sets the range from 100ns to 1 999us 3 sets the range from 2us to 40us PULSRISE nrf Set the pulse waveform positive edge to nrf sec PULSFALL nrf Set the pulse waveform negative edge to nrf sec PULSDLY nrf Set the pulse waveform delay to nrf sec Nois...

Страница 101: ...ts in a command error ARB2 bin See ARB1 description ARB3 bin See ARB1 description ARB4 bin See ARB1 description ARB1DEF Returns user specified waveform name waveform point interpolation state and waveform length of ARB1 ARB2DEF See ARB1DEF description ARB3DEF See ARB1DEF description ARB4DEF See ARB1DEF description ARB1 Returns the data from an existing arbitrary waveform location ARB1 The data con...

Страница 102: ...PMSRC cpd Set PM waveform source to INT or EXT MODPWMSRC cpd Set PWM waveform source to INT or EXT MODSUMSRC cpd Set SUM waveform source to INT or EXT MODAMFREQ nrf Set AM waveform frequency to nrf Hz MODFMFREQ nrf Set FM waveform frequency to nrf Hz MODPMFREQ nrf Set PM waveform frequency to nrf Hz MODPWMFREQ nrf Set PWM waveform frequency to nrf Hz MODSUMFREQ nrf Set SUM waveform frequency to nr...

Страница 103: ...ds TRGSRC cpd Set the trigger source to INT EXT CRC or MAN TRGPER nrf Set the trigger period to nrf sec TRGPOL cpd Set the trigger slope to POS or NEG TRGOUT cpd Set the trigger output of the current channel to AUTO CARRIER MODULATION SWEEP BURST TRIGGER or OFF The trigger output of a channel can be used by the other channel as trigger source for Sweep and Burst functions Clock and Synchronising C...

Страница 104: ... Register This will happen immediately the command is executed because of the sequential nature of all operations OPC Query Operation Complete status The response is always 1 rmt and will be available immediately the command is executed because all commands are sequential PRE nr1 Set the Parallel Poll Enable Register to the value nrf PRE Returns the value in the Parallel Poll Enable Register in nr...

Страница 105: ...d unlocks the keyboard Calibration Specific Commands See the calibration section for details of calibration specific commands Error Messages Each error message has a number only this number is reported via the remote control interfaces Error message numbers are placed in the Execution Error Register where they can be read via the remote interfaces Legacy Commands The single channel variant of this...

Страница 106: ...e service request enable register to nrf SRE returns the value of the service request enable register in nr1 numeric format STB returns the value of the status byte register in nr1 numeric format TRG this command is the same as pressing the TRIGGER key TST the generator has no self test capability and the response is always 0 rmt WAI waits for operation complete and executed before the next is sta...

Страница 107: ...AMPDN TRIANG SQUARE ARB1 ARB2 ARB3 ARB4 USRNAME1 USERNAME2 USERNAME3 or USERNAME4 ARBRESIZE cpd nrf changes the size of arbitrary waveform cpd to nrf BEEP sounds one beep BEEPMODE cpd sets beep mode to ON OFF WARN or ERROR BST cpd sets the burst to OFF NCYC GATED or INFINITE BSTCOUNT nrf sets the burst count to nrf cycles maximum 1048575 cycles BSTPER nrf sets the burst trigger period to nrf sec B...

Страница 108: ...SINE SQUARE RAMPUP RAMPDN TRIANG NOISE DC SINC EXPRISE LOGRISE ARB1 ARB2 ARB3 ARB4 PRBSPN7 PRBSPN9 PRBSPN11 PRBSPN15 PRBSPN20 or PRBSPN23 MODAMSRC cpd sets AM waveform source to INT or EXT MODBPSKPHASE nrf sets BPSK phase offset to nrf degree MODBPSKRATE nrf sets BPSK rate to nrf Hz MODBPSKSRC cpd sets BPSK waveform source to INT or EXT MODFMDEV nrf sets FM waveform deviation to nrf Hz MODFMFREQ n...

Страница 109: ...VE mode NOISADD cpd select ON to add the noise to the output waveform and OFF to remove the noise from the output waveform NOISLVL nrf sets the output noise level to nr1 OUTPUT cpd sets the output to ON OFF NORMAL or INVERT OUTPUTCPLNG cpd sets output coupling to ON or OFF PER nrf sets the waveform period to nrf sec PHASE nrf sets the waveform phase offset to nrf degree PLSFRQCPLOFS nrf sets pulse...

Страница 110: ... to nrf sec SWPTRGPOL cpd sets the sweep trigger slope to POS or NEG SWPTRGSRC cpd sets the sweep trigger source to INT EXT or MAN SWPTYPE cpd sets the sweep type to LINUP LINDN LINUPDN LINDNUP LOGUP LOGDN LOGUPDN or LOGDNUP SYNCOUT cpd sets the sync output to ON OFF SYNCTYPE cpd sets the sync type to AUTO CARRIER MODULATION SWEEP BURST or TRIGGER TRACKING cpd sets channel tracking to OFF EQUAL or...

Страница 111: ...invalid Frequency cannot be less than deviation 10 Frequency invalid Freq Dev upper limit VALUE or Bit Rate invalid Freq Dev upper limit VALUE or Period invalid Freq Dev upper limit VALUE 12 Carrier frequency cannot be edited when Sweep is on or Carrier period cannot be edited when Sweep is on 14 Frequency invalid Cannot exceed 10MHz for current Burst type or Bit Rate invalid Cannot exceed 10Mbps ...

Страница 112: ...r limit VALUE 49 High level invalid 20dB range held Lower limit VALUE 50 High level invalid 30dB range held Lower limit VALUE 51 High level invalid 40dB range held Lower limit VALUE 52 High level invalid 50dB range held Lower limit VALUE 53 Low level invalid Upper limit VALUE 54 Low level invalid 0dB range held Upper limit VALUE 55 Low level invalid 10dB range held Upper limit VALUE 56 Low level i...

Страница 113: ...upper limit VALUE 91 Frequency invalid for Arb Arb frequency upper limit VALUE or Period invalid for Arb Arb period lower limit VALUE 93 Frequency invalid for Arb Arb frequency lower limit VALUE or Period invalid for Arb Arb period upper limit VALUE 95 Cannot add Noise to Square Turn NoiseAdd off to output Square 96 Cannot add Noise to Pulse Turn NoiseAdd off to output Pulse 97 Cannot add Noise to...

Страница 114: ... than Delay Width MIN WIDTH VALUE 127 Width cannot exceed Period Delay Deviation MIN WIDTH VALUE or Width cannot exceed Period Delay MIN WIDTH VALUE 129 Width Deviation invalid Lower limit MIN WIDTH VALUE or Width time invalid Lower limit MIN WIDTH VALUE 131 Width cannot exceed Period Delay Deviation Rise Fall or Width cannot exceed Period Delay Rise Fall 133 Width cannot exceed Period Delay Devia...

Страница 115: ...eviation invalid Freq Dev upper limit VALUE 167 Frequency deviation invalid Lower limit VALUE 168 Frequency deviation cannot exceed carrier frequency or Frequency deviation cannot exceed carrier bit rate 169 Deviation cannot exceed Period Delay Width MIN WIDTH VALUE 171 Deviation cannot exceed Width MIN WIDTH VALUE 172 Deviation invalid Lower limit 0ns 173 Deviation cannot exceed Period Delay Widt...

Страница 116: ...r limit 8192 210 Point number invalid Last defined point VALUE 211 Point number invalid First defined point 1 212 Number of points invalid Upper limit VALUE 213 Number of points invalid Lower limit 1 214 Arbs cannot be edited if Mod Sweep or Burst is on 215 Please specify a filename in Short FileNameSFN format 216 Clock source cannot be changed when generator is set as Slave 217 Generator cannot b...

Страница 117: ...ss VALUE Data written VALUE Data read back VALUE 247 Modulation is not allowed for Noise 248 Only PWM is allowed for Pulse or PWM is allowed only for Pulse 249 Disconnect LAN USB GPIB cables and try again 250 PWM invalid for PRBS Turn Mod off to output PRBS 251 Cannot add Noise to PRBS Turn NoiseAdd off to output PRBS 252 PRBS bit rate invalid Limited by PRBS edge 253 PRBS edge invalid Upper limit...

Страница 118: ...are coupled 287 Tracking cannot be selected when frequencies are coupled 288 Tracking cannot be selected when generator is set as Master Slave 289 Frequency deviation invalid Limited by PRBS edge 290 FM dev invalid for desired waveform Turn Mod off to output waveform 291 Unable to edit selected ARB Currently in use 292 Number of points invalid Current upper limit 65536 Warning Messages 1 Carrier f...

Страница 119: ...as instructed 31 Generator is set as Master 32 Generator is set as Slave 33 Current Arb shape changed to default Exp to allow phase lock 34 Current Mod type changed to default AM to allow phase lock 35 Instrument is not calibrated 36 Calibration values cleared Please power cycle the instrument 37 USB Flash disk waveform files limited to 1260 38 USB Flash disk setup files limited to 1260 39 Please ...

Страница 120: ...ges 501 Key test successful 502 New password stored 503 Select a unit to enter value or press Cancel 504 Please reduce the files on USB Flash disk and try again 505 Test data has been written to RAM 506 RAM test successful ...

Страница 121: ...th 100 FM Deviation 5 kHz PM Deviation 180 degrees FSK Hop Frequency 100 kHz FSK Rate 1 kHz SUM Modulation Level 100 BPSK Hop Phase 180 degrees BPSK Rate 1 kHz PWM Width Deviation 1 µs Modulation State Off Sweep Factory Setting Start Stop Frequency 10 kHz 100 kHz Sweep Time 1 ms Sweep Mode Linear Sweep State Off Burst Factory Setting Burst Count 1 Cycle Burst Start Phase 0 degrees Burst State Off ...

Страница 122: ... Internal Trigger Period 1 ms Remote Interface Configuration Factory Setting GPIB Address 5 DHCP On Auto IP On IP Address 192 168 1 100 Subnet Mask 255 255 0 0 Default Gateway 0 0 0 0 DNS Server 0 0 0 0 Host Name none Domain Name none Calibration Factory Setting Calibration State Not protected ...

Страница 123: ...insertion into other programs Wveform data may also be read from files conforming to the CSV file format 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 go to any section of ...

Страница 124: ...obtained directly from the Manufacturers or their agents overseas Cleaning If the instrument requires cleaning use a cloth that is only lightly dampened with water or a mild detergent WARNING TO AVOID ELECTRIC SHOCK OR DAMAGE TO THE INSTRUMENT NEVER ALLOW WATER TO GET INSIDE THE CASE TO AVOID DAMAGE TO THE CASE NEVER CLEAN WITH SOLVENTS Web link For the latest version of this instruction manual IV...

Страница 125: ... Huntingdon Cambridgeshire PE29 7DR England United Kingdom Telephone 44 0 1480 412451 Fax 44 0 1480 450409 International web site www aimtti com UK web site www aimtti co uk Email info aimtti com Aim Instruments and Thurlby Thandar Instruments ...

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