SF2000 User Manual
Contents
1. 20 PulseWave Pattern File ForMat oooonnccnnnoncccnnoncnnonanancnononcnonnnrn cnn nano nan nn 20 Programming Examples 20 Example Basic Pattern and Pulse 20 Theory of Opera cias 22 Programming Interface db 22 SCPI Conformance 22 User developed Prograrmming cccccsecceceseeeeeeeeeeeeeeseneeenseneeeeeseaeeneseeeeensaenenseseeeesesenseeneneaeeneeees 22 CALIBRATION 2 anida caida decada 24 Calibration Interval occcnnccocccccnncccnnoonoccnnnnnonnnononnnnnnnonnnnnnnnnnnnnnnnnnnonnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnos 24 ii aii 24 GENERAL SAFETY AND WARRANTY 25 To Avoid Fire or Personal Injury ein ee 25 tect disci pa ii 25 SOFTWARE UPDATE 26 PRODUCT EINE ie 27 OW T 27 Buy Online oca as a2. dete 27 Purchase Orders ici aaa 28 e tie so 28 Table of Figures FIGURE 1 FRONT PANEL FIGURE 2 REAR PANEL Table of Tables TABLE L SPECIFICATIONS 9 TABLE 2 GLOBAL PARAMETERS oct a 17 TABLE PER CHANNEL PARAMETERS cccsecsssscecececeecsssesesceceseceecsesceceeeeuseececeseceeganescecesseeeeuageseeceees 18 TABLE 4 SIGNAL FORGE PRODUCT LINE ssesescecececeesesssseececeseaeessseececceeuesecceceseceeneneececesseeeaueneeeeeeees 27 SF2000 USER MANUAL Introduction The Signal Forge 2000 Pattern and Pulse Generator is a high voltage signal source with optional battery operation for field use The pattern based pulse mode featured on the SF2000 is much more capable than common pulse generators which only generate simple pulse bursts The SF2000 may be controlled from the front panel or from a PC with the PulseWave software supplied with the unit a USB cable connects the SF2000 to the PC SCPI Standard Commands for Programmable Instruments command support allows for easy integration into most test environments PulseWave runs on Windows 7 Vista XP and 2000 USB drivers are available for Windows 7 XP CE 2000 Vista 98 and Mac OS X PulseWave is not available for OSX Applications The SF2000 s high voltage and high power capability make it ideal for numerous applications such as Sensor testing and sensor simulation Low data rate comm
3. Small portable package 8 83in x 7 83in x 2 85 in Note Future models will provide 1ns pulse width resolution and up to 9 channels PulseWave Software Features PulseWave is a Microsoft Windows compatible program supplied with the SF2000 It provides simple intuitive control of the SF2000 PulseWave features include Support for all SF2000 operations Save or restore patterns to from files Save and restore settings from SF2000 flash Edit patterns in many modes binary hex ON OFF count Update firmware Force an output high low Arm and trigger channel s simultaneously from your PC View channel status armed triggered running done Multiple channel parameter editing and viewing Saves SCPI command history which may be copied to a text file for review or use in a user developed test program SF2000 USER MANUAL Specifications All parameters are programmable in 10ns increments using the internal master clock MCLK 100 MHz unless otherwise specified Table 1 Specifications Parameter Description Ambient Temperature 00 to 400 32 to 104F Pulse width range 10ns to 42 9 seconds 32 bit MCLK counter 100mhz Pulse width resolution 10ns Amplitude Range 3 3V to 20V into high impedance 1 65 to 10V into 50 Ohms Amplitude Accuracy 0 2V Amplitude Resolution 0 05V Output power maximum 150mA per channel Rise fall times 3ns 5V 1 MHz into 50 ohm
4. When an output voltage is set the voltage is dynamically sampled just before the output transistor driver The voltage drop through the diode 0 65 0 85V is calibrated using a small load If your application has a large load then the output voltage may be lower and need to be compensated by programming a higher e g 0 2V voltage depending on the desired accuracy Calibration Interval Calibration should be checked yearly Procedure Calibration should take place in an environment in which the temperature is the same as the temperature at which the unit will be used 1 Power up the SF2000 for 30 minutes prior to calibration to allow for temperature soak 2 Start up PulseWave and navigate to the Calibration window 3 Follow the instructions on the screen 4 In order to ensure the new values are correct power the SF2000 off and on and verify the new calibration settings by setting up an appropriate output condition for each calibration 24 SF2000 USER MANUAL General Safety and Warranty Information Review the following safety precantions to avoid injury and prevent damage to this product or any products connected to it To avoid potential hazards use this product only as specified Only qualified service personnel should perform service procedures To Avoid Fire or Personal Injury Use Proper Power Adapter Use only the power module provided with this product Connect and Disconnect Properly Do not connect or
5. and allow 5 seconds for it to boot Start PulseWave The first time you run PulseWave you need to select the USB COM port Navigate to the gt 05 COM Port menu and select the SF2000 COM port The COM port number will be saved so you do not have to select it the next time the program runs Note If the SF2000 is not powered on when PulseWave starts you will receive a message that the COM port could not be found Either exit and restart PulseWave or re select the COM port Pressing the Identify button causes PulseWave to display SF2000 configuration information If PulseWave is started before the SF2000 finishes booting you will get an error message when you press the dentify button Changes made using PulseWave are immediately programmed on the SF2000 If you modify a channel related parameter the channel output is set low while the channel is programmed The output will not go high until the channel is armed and triggered if the output is programmed as active high it causes the output to be high the whole time instead of low The SCPI command history window displays the commands and responses to from the SF2000 This is useful if you are developing your own control program Custom Programming The SF2000 may be operated using a third party application or user developed software which supports the SCPI standard IEEE 488 1990 0 with a few minor differences For complete programming information refer to the SCPI Programmer s Ma
6. any timing so long as the second button is pressed before releasing the first A channel stop message is momentarily displayed when the action is performed Any combination of channels may be armed triggered or stopped using these buttons but all channels are enabled by default Arm Button This button reprograms then arms channels making them ready to trigger If a channel is still running from a previous trigger it is immediately stopped when reprogramming begins By default all channels are enabled to respond to the button arm operation Arming occurs simultaneously on the same MCLK edge for all channels The Arm LED indicates arming status as follows e LED is ON Any channel armed by the button is armed The LED will go OFF when all of the channels armed by the button have been triggered Trigger Button This button triggers armed channels By default all channels are enabled to respond to the button trigger even if another trigger source is enabled The Trigger LED goes ON when any channel triggers and goes OFF when no channels have triggered in the last half second Stop Pressing the arm and trigger buttons together re programs enabled channels The channels are then ready to be armed By default all channels are enabled to respond to the stop operation Operation Using the Front Panel 1 Plug in AC adapter 2 Turn on the SF2000 3 Press any key to bring up the menu a The X key is used to go up one level in the me
7. be purchased directly from the Signal Forge web site at www signalforge com PulseWave EZ Wave and EZ Terminal software may be downloaded for free from the Products page of the Signal Forge web site If you have a problem downloading the software send a request to sales signalforge com anda copy of the requested software will be sent to you via email 27 SF2000 USER MANUAL Purchase Orders Purchase Orders may be submitted via email to sales signalforge com or fax to 512 275 3735 Quotes If you require a quote please send a request for quote to Signal Forge sales at sales signalforge com or call 512 275 3733 ext 1 For a complete description pricing and ordering information visit the Product page of the Signal Forge web site www signalforge com 28 29 30 31 SIGNAL FORGE LLC SF2000 User Manual v1 0 2115 Saratoga Drive Austin TX 78733 Phone 512 275 3733 Fax 512 275 3735 www signalforge com 2009 2012 Signal Forge LLC Signal Forge SF2000 SF1010 Sf1000 SF1020 Battery Powered Signal Generator are Trademarks of Signal Forge LLC All rights reserved All other trademarks are the property of their respective owners
8. driver Two drivers will be installed a USB driver and a VCP virtual COM port driver Installation is usually automatic if the PC is connected to the internet Windows 7 uses the internet to connect to the Windows Update website and install any drivers not already on your computer If Windows does not recognize the SF2000 re boot your PC while the SF2000 is connected and turned on Com Port Identification When the UBS Virtual COM Port driver is installed make a note of which COM port number is assigned to the USB port You can find this information under Control Panel gt Hardware and Sound gt Devices and Printers and look for FT232R USB UART Double click to open the properties window then select the Hardware tab You should see something like 14 SF2000 USER MANUAL USB serial port COM5 In this case COM5 is the SF2000 and COMS is the port you need to select when running PulseWave or your own program The SF2000 can communicate with any computer that supports a virtual COM port for the FTDI RT232R USB chip PulseWave Software Installation The PulseWave program is installed by simply copying it to your desktop or any directory you choose If more than one SF2000 is connected to a computer you need to install one instance of PulseWave for each unit Each copy of PulseWave must reside in a separate directory System Requirements Microsoft Windows 7 Vista XP 2000 Using PulseWave Software 1 Turn on the SF2000
9. for every pattern bit What happens is this Arm the channel The first trigger causes the programmed trigger delay before the first pattern bit or pulse is output The next trigger outputs the second pattern bit or pulse A pattern length of N requires N 1 triggers to complete the normal sequence For example a 3 bit deep pattern gets triggered 3 times The last pattern bit is being output Channel status is still running The next trigger completes the pattern sequence channel status is done and the output is inactive the pattern has completed The channel can now be armed again for a new sequence Pulse mode works as usual when a pattern bit is 1 a pulse occurs In single step mode the lt MCLKs pattern bit period gt parameter is not used The bit period is strictly defined by the distance between triggers Channel skew can be used to delay outputs in relation to each other Trigger Delay and Skew The trigger delay parameter specifies how many MCLKs to delay the channel output from the trigger The skew parameter specifies an additional delay to the output uses programmable delay line Trigger delay moves the start of a pattern in relation to the trigger This is commonly used to move the output of one channel in relation to another channel For example programming trigger delay 0 for channel 0 and trigger delay 1 for channel 1 when the channels are triggered the pattern or pulses from channe
10. AVE SOFTWARE AAA PP AAA 14 14 ee 14 USB Driver 14 Com Port 14 PulseWave Software InstallatiOM oonnocinninninnnnnnnnnnnonnccnnncccnnrcnnrccnnrn nn rra 15 System Requirements Microsoft Windows 7 Vista 2000 15 Using PulseWave Software uunsaunnnsnnnnnnnnonnnnnnannonnnnnnnnnnnnnnnnnnnonnnnnnnnnnennennnnnnnnnnnnnnnrnnennnnnnnnn 15 Custom Programming ee ehe rt 15 OPERATING THE SF2000 2 42 422 242234 244442254000000044 nai 16 First Set The Output Voltage 16 Power Up and Reset eee 16 Stopping and Starting a 8 16 Operation iodo ser 17 Programmable Parameters sic ned 17 Channel Status vicio 19 E A E 19 o E E T 19 Single Step 19 Trigger Delay and SkeW conicinccinocinncccnncconoconnncnnnncon roce 19 EEE
11. SIGNAL FORGE SIGNAL FORGE 2000 HIGH VOLTAGE PULSE AND PATTERN GENERATOR User Manual Technical Support Email Support signalforge com Phone 512 275 3733 option 2 Contact Information Web www signalforge com Customer Service and Sales Email Sales signalforge com Phone 512 275 3733 option 1 Fax 512 275 3735 Address Signal Forge LLC 2115 Saratoga Drive Austin TX 78733 Table of Contents AAA 7 7 SF2000 ESQtULES laa 7 PulseWave Software Features ocoococncccincccconnconnncnnncnnnn conc nnnnn cnn nr nr 8 SPECIFICATIONS AAA 9 FRONT AND REAR 11 Front Panel Diagram Make 11 Front Panel Cone 11 Indicator 11 12 AN 12 Tigger BUON ee AL a A Sareta 12 12 Operation Using the Front Panel eccceecceeeseeceneeeeneeeeneeseaeeseaeeseaeeseaeeseaeeseaeeseaeeseaeeseaeeseeeseaeeseaees 12 AO 12 Edit innen 13 Rear Panel da cba 19 Rear Panel Connectors cococonccccoccconccononcnonanonnn corno ccoo rra 13 PULSEW
12. apability For a given measurement function such as frequency or voltage SCPI defines the specific command set that is available for that function SCPI Conformance Information Unless otherwise specified commands and queries are performed as described by the SCPI standard For complete programming information refer to the SCPI Programmer s Manual which may be downloaded from the Support page of the Signal Forge Web site To obtain a hardcopy of the manual send a request to sales signalforge com User developed Programming The USB port appears in Microsoft Windows as a virtual COM port Programming of a virtual COM port is the same as a physical COM port using the COM port interface that Windows includes with its programming languages such as Basic C and C It is also supported by programs such as LabViewO LabWindows CVI and HP VEE 22 SF2000 USER MANUAL The command interface uses SCPI Standard Commands for Programmable Instruments which is a common programming interface for lab devices SCPI is a set of ASCII commands sent to the SF2000 over the USB connection COM port The SCPI API is described in a separate SCPI Programmers Manual available for download from the Support page of the Signal Forge web site www signalforge com 23 SF2000 USER MANUAL Calibration and Accuracy The SF2000 factory calibrated but may also be calibrated by the end user Calibration is done for the output voltage and channel to channel skew
13. cations section Indicator Lights There are 4 LEDs to the left of the LCD screen e Status OFF means no fatal or questionable conditions Orange means there may be minor problems with the output the output is usable but not fully accurate usually due to a calibration error Red means a fatal condition exists probably hardware failure and the output is not usable The cause can be found using the front panel menu or by running PulseWave e Battery low only ON red during a low battery condition e Charging only ON green when the battery is charging e momentary ON green when any of the outputs toggle Note that the battery related LEDs are only operational on battery powered models Programmers note The Status LED is directly related to SCPI status Orange means only questionable conditions as reported by the Questionable Condition register are present the output is usable but not fully accurate Red means one or more fatal conditions output is unusable Only fatal conditions are reported in response to SCPI commands used to program channel operation 11 SF2000 USER MANUAL Buttons The LCD buttons are used for menu operation The two panel buttons Arm and Trigger perform three operations Arm Trigger and Channel Stop These actions occur upon button release For the channel stop action the buttons can be pressed and released with
14. disconnect external header pin leads while they are connected to a voltage source turn the SF2000 and external control logic simultaneously Observe All Terminal Ratings Consult the product manual for ratings information before making connections to the product Do Not Operate Without Cover Do not operate this product with the cover removed Do Not Operate With Suspected Failures If you suspect there is damage to this product have it inspected by qualified service personnel Operate Within Operating Range No not operate this product outside the operating ranges specified on the manual Do not operate in Wet Damp Conditions Do Not Operate in Explosive Atmosphere Keep Product Surfaces Clean and Dry Warranty Signal Forge warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for a period of one 1 year from the date of shipment If a product proves defective within the respective period Signal Forge will repair or replacement the product without charge EXCEPT AS PROVIDED HEREIN SIGNAL FORGE MAKES NO WARRANTY OF ANY KIND EXPRESS OR IMPLIED INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IN NO EVENT SHALL SIGNAL FORGE BE LIABLE FOR INDIRECT SPECIAL OR CONSEQUENTIAL DAMAGES 25 Appendix Software Update Procedure The embedded firmware may be updated by the user as new revisions become available by follow
15. e data CHO 17 255 The pattern length must be specified using patternDepth lt channel name gt lt length gt Example patternDepth CH1 13 The file must define at least as much data as the specified pattern depth When a file is loaded to the SF2000 channels that do not specify any data will issue a warning message and no data for that channel will be loaded Channels with specified data will always be loaded Programming Examples Note All operations are based on patterns Set defaults is used in the examples to put the instrument into a known state This will set the output high voltage to the default lowest value Example Basic Pattern and Pulse Operation This example describes how to use pattern mode and how that pattern is used to output a series of pulses To output a pattern of 1011 on channel 0 using PulseWave do the following Click on Set Defaults Pattern mode is set by default Set the output voltage using the Output Voltage window or leave at default 20 SF2000 USER MANUAL Open the Channel Pattern window Set the mode to binary Inthe CHO row of data click on the first button and enter a value of 4 This will be the pattern depth as indicated by the tool tip text that shows up when your mouse hovers over the button Click on the data buttons to enter the 1011 pattern Click on Write to transfer the pattern to the SF2000 Open the Cha
16. e when low Normally the gate function is active when IN1 is high This enables gating when IN1 is low The per channel parameters are listed in Table 3 Per Channel Parameters 17 SF2000 USER MANUAL Table 3 Per Channel Parameters Parameter Description Output voltage The voltage on the output when high Output control Active high active low force high force low Active high means the output follows the pattern bit 1 means output is high Active low inverts the output Force sets the output to a specific value ignores pattern Trigger delay MCLK cycles from trigger to start of pattern This can be used to offset pattern bits pulses from one channel to the next Pattern bit period MCLK cycles to output each pattern bit Pattern depth How many pattern bits to output Pattern data The bit values that define the pattern Pulse mode enable When disabled the output follows the data pattern When enabled a pulse is output for each 1 bit of the data pattern Pulse width MCLK cycles that every pulse is high pulse mode Continuous mode enable When ON the pattern will repeat forever after the first trigger Single step mode enable When ON a trigger is required for every bit of the pattern Hardware trigger source INO signal IN1 signal rate generator or none Triggering can always use trigger button or software SCPI c
17. h is programmable must be less than the pattern bit period For example if the SF2000 is programmed for bit period 100 1us using the pattern 1011 and not using pulse mode the output would go high for 1us low 1us high 2us then back low until the next trigger If pulse mode was enabled the output would be a pulse at Ous Zus and Available triggers are input signals INO and IN1 plus a global rate generator Triggering can also be done by the front panel trigger button or under software control All channels using the same trigger source including software trigger are triggered synchronously Programming Interface The programming interface complies with the IEEE488 2 and SCPI 1999 0 standards IEEE488 2 2004 Standard Digital Interface for Programmable Instrumentation describes how to send commands to instruments and how to send responses to controllers It defines some frequently used housekeeping commands explicitly but each instrument manufacturer was left with the task of naming any other types of command and defining their effect SCPI 1999 0 Standard Commands for Programmable Instruments SCPI is the new instrument command language for controlling instruments that goes beyond IEEE 488 2 to address a wide variety of instrument functions in a standard manner SCPI promotes consistency from the remote programming standpoint between instruments of the same class and between instruments with the same functional c
18. ing order 1 Set the global operating parameters 2 Setthe per channel output voltage 3 Setthe per channel operating parameters including pattern data 4 Arm 5 Trigger must be armed first then triggered Once this is done you normally just modify desired parameters e g pattern data or pulse width then arm and trigger When most channel related parameters are changed e g pulse width the channel is reprogrammed channel must be armed Some parameters do not require reprogramming the channel e g enabling the gate feature and do not change the current channel status e g running To check the channel state after changing a parameter open the Control Window and do one of the following Click Arm to re program and arm the channel Click Stop to re program the channel requires arming a Click Update Status to display the current channel status Programmable Parameters The globally programmable parameters are listed in Table 2 Global Parameters Table 2 Global Parameters Parameter Description INO trigger use Rising falling edge or level sensitive high low IN1 trigger use Rising falling edge or level sensitive high low Interval counter MCLK cycles for use as trigger source IN1 drives MCLK Enabled means MCLK is derived from the signal on user input IN1 The signal is multiplied by 10 to become MCLK and has frequency requirements as stated in the specifications Gat
19. ing the procedure below Note that all output activity will be suspended while the software update is in process Software updates are posted to the Support page of the Signal Forge web site Procedure 1 Download the latest revision The filename format is SF2000_dwn_X_Y where X is the version and Y the revision 2 Start PulseWave and select Misc then Download Firmware 3 Select the file you received from Signal Forge and the download will begin Downloading normally takes about 30 seconds 26 SF2000 USER MANUAL Product Line Table 4 Signal Forge Product Line Model Description SF2000 Pattern and Pulse Generator SF1010 Portable Signal Generator with SCPI interface SF1020 Battery Powered Signal Generator 1800M RF Expansion Module 950 MHz to 1 8 GHz for SF1010 2500M RF Expansion Module 1 5 GHz to 2 6 GHz for SF1010 SF BRK 1U Rack Mount Bracket Holds 3 SF1010 1000 and attaches to a standard 19 chassis USB 6 Standard USB to type B cable Cable 6 Serial Cable DB9 Male to DB9 Female 6Ft Use with USB adapter for SF1010 USB Adapter USB 2 0 to DB9 Serial converter with 2 5ft cable Use with cable 6 for SF1010 Plug and play USB Type A male to D 9 male Note The SF1010 supersedes the SF1000 and is recommended for all new applications However the SF1000 is still available How to Buy Buy Online Products may
20. ken into account when driving higher voltages into a 50 Ohm load Note 2 Chanel skew is implemented using a programmable delay line with 250ps steps Total output delay adds the digital trigger delay parameter in combination with the channel skew parameter The skew delay is most accurate near Ons 32ns and 64ns Integral non linearity is the deviation from a straight line response drawn between the measured step zero delay tDO and the measured step 255 delay tD255 with respect to the step 0 delay Note 3 The fixed trigger delay is composed of two parts the digitally sampled trigger and an analog delay line may be removed from the path The digital portion runs from MCLK usually 100 MHz so it has a range of 10ns e g 50 60ns The delay line inserts a 17 23ns delay that depends on the calibrated value for that delay line Note 4 Frequency tolerance is the deviation from the specified nominal frequency at ambient room temperature Frequency stability is the deviation over a temperature range 10 SF2000 USER MANUAL Front and Rear Panels Front Panel SIGNAL FORGE SF2000 status BATT Low q BATT CHG 9 aa Figure 1 Front Panel Front Panel Connectors BNC input INO can be used as a trigger signal BNC input IN1 can be used as a trigger or gate signal and it may be used to drive the master clock MCLK When used to drive MCLK the signal is multiplied by 10 and has speed requirements defined in the specifi
21. l 1 will happen 10ns after channel 0 19 SF2000 USER MANUAL The skew parameter specifies an additional delay to the output Skew is implemented using a programmable delay line that is programmed in 250ps increments For example a 1ns delay programs the device with value 4 plus the calibrated Value Gate The IN1 signal can be used to gate the trigger and or output of any channel Gate is normally active high i e when high the trigger or output is gated Once a channel is triggered the pattern runs to completion Gating the output immediately sets the output to the inactive level even if the pattern is running it only affects the final output PulseWave Pattern File Format PulseWave can use files to save and load patterns The file extension is usually sfd The format and rules are described here The first line must be OSignalForge second line must be SF2000data Any line whose first character is not is discarded considered a comment 200 chars per line Max 32 data bytes per line Data is always a byte size decimal 0 255 Data can be specified in any channel order interspersed lt channel name gt CHO CH8 f more than one pattern depth is specified the last one is used Pattern depth is the number of bits to use same as the SF2000 parameter Data for a channel is specified as data lt channel name gt lt byte gt lt byte gt Exampl
22. nnel Setup window Open the Channel Control window Click on Arm and you should see the LED light up on the Arm button Click on Trigger to run the pattern once and you should see the Arm button LED go off The time that each bit of the pattern is output depends on the bit period parameter A value of 100 MCLKs would be 1000ns per bit To output pulses instead of the pattern Change the Pulse Mode button in the Channel Setup window to ON this enables pulse mode Arm and trigger the channel The output will be three pulses bit period 0 2 and You can use the Channel Setup window to change the bit period pulse period pulse width and other parameters 21 SF2000 USER MANUAL Theory of Operation All operations are synchronous using the master clock MCLK except the analog pulse option described elsewhere MCLK is 100 MHz unless driven by an outside source This gives a 10ns resolution for each programmable parameter e g bit period pulse period pulse width The underlying operation is always a 16k deep per channel pattern generator driven by MCLK The pattern rate is a multiple of MCLK Patterns may be run per trigger continuously looped or stepped bit by bit trigger per bit When pulse mode is enabled the pattern itself is not output but instead each 1 bit of the pattern determines where a pulse will occur A 0 bit keeps the output inactive The pulse widt
23. ntil armed and triggered To reset the system e Use the front panel menu Reset Reset Instrument e Use PulseWave to issue a Reset Instrument The default settings may be viewed using the front panel menu or the PulseWave program They are also listed in the SCPI Programmers Manual Stopping and Starting a Channel In order to run a channel must be armed then triggered The following methods are used to re program and arm channels Press the front panel Arm button Inthe PulseWave Channel Control window click the Arm button 16 SF2000 USER MANUAL A channel may be stopped and re programmed but not armed in these ways Press the front panel Arm and Trigger buttons at the same time to create the Stop condition Use the front panel menu Reset Stop channel Inthe PulseWave Channel Control window click the Stop button When a channel is re programmed the output will be low unless you set the output to active low until the channel is armed and triggered Operation This section describes how to use either the PulseWave software or the front panel to control the SF2000 Emphasis is placed on PulseWave The front panel menu system supports the same functions You may also write your own program to control the SF2000 Refer to the SCPI Programmer s Manual for a description of the programming interface Operating the SF2000 generally proceeds in the follow
24. nu or to abort editing The V key is used like OK or ENTER or SELECT When the panel LCD says something like press OK it means press the V key The front panel supports all SF2000 functions However pattern editing is limited due to the available character space There are two modes menu and edit When you are not editing a value you are in menu mode Menu Mode In menu mode the upper right of the screen shows CHx where x is the current channel number When a channel specific parameter is displayed or edited it belongs to channel x 12 SF2000 USER MANUAL Up down arrows are used to scroll the current menu level Right left arrows change the current channel number This is handy for quickly scrolling through the channels when you have a parameter selected X backs up one menu level at the beginning of a line indicates that there is a submenu below the current selection press lt check gt to go to the next level H at the beginning of a line indicates that a parameter is being viewed The last line displays the current parameter value lt check gt to modify the value on off values may be changed entering edit mode Edit Mode There are several edit windows Left right arrows move from digit to digit Up down changes the value of the digit Y accepts the value X aborts the edit with no changes made Note If you change parameters using the front panel while the PulseWave soft
25. nual for the SF2000 which may be downloaded from the Support page of Signal Forge web site 15 SF2000 USER MANUAL Operating the SF2000 First Set The Output Voltage Level When the SF2000 programs the output voltage it forces the output high for a short period of time lt 100ms while the voltage is moved from the minimum setting to the target voltage This is done even if the lt output control gt parameter is set as disabled low Once the voltage level has been set the output is placed at the level determined by the lt output control gt parameter usually OV The voltage is programmed at these times Power up max voltage output is 3 3V unless user setting is loaded When instrument reset is performed max voltage output is 3 3V The output voltage level parameter is changed If you work with devices that can be damaged by high voltage we suggest you do the following Unplug your cables before setting a new voltage level in case you enter a damaging voltage value by mistake Unplug your cables before loading a new setting Save settings with the voltage set to the minimum Modify the voltage after loading the setting Power Up and Reset When the SF2000 powers up it either loads the default instrument settings or a user defined setting System reset forces all parameters to their default value and reprograms the instrument The output is set for minimum voltage level Channel outputs are low u
26. ommand Auto arm enable When enabled the channel is automatically armed after it runs each sequence Channel must be armed once Gate trigger enable Enabled means IN1 signal gates disables the trigger Gate output enable Enabled means IN1 signal gates the output forces inactive The lt output control gt parameter has priority i e forcing a specific output value ignores gating Skew ns Delay the output with 250ps resolution Skew must be enabled next parameter Skew disable note 1 When TRUE the skew delay chip normally in the output path is removed Skew should be disabled whenever the output signal will be less than 40ns i e shorter pulse or bit period is less than 40ns Arm button enable When enabled pressing the front panel Arm button reprograms and arms this channel Default is enabled Trigger button enable When enabled pressing the front panel Trigger button triggers this channel if armed Default is enabled Stop button enable When enabled pressing the front panel Arm and Trigger buttons at the same time re programs this channel The output will be inactive and ready to be armed Default is enabled Note 1 An analog delay line is normally used in the output data path used to implement skew This delay line cannot accurately pass pulses of less than 40ns Therefore when the output will be programmed to create high or low signal
27. s 7ns 20V 1 5 pulse into 50 ohms Pulse period pattern bit period 20ns to 42 9 seconds 32 bit MCLK counter 100mhz Pattern depth per channel 16k bits Channel skew Added delay 0 to 50ns in 250ps increments Must be disabled when output high or low time is less than 40ns Fixed trigger delay 50 80ns Delay is 20 30ns less if skew is disabled Trigger jitter from INO or IN1 10ns Programmable trigger delay Ons 167 7ms 16 bit MCLK counter 100 MHz This delay is in addition to the fixed trigger delay Internal trigger interval Min 8 MCLK cycles 80ns to 42 9s 10ns resolution Skew accuracy skew 0 50ns 1 0ns 25C 2 5ns over OC 400 Skew integral non linearity 2 5ns 25C Skew step size 0 75 to 1ns typ 0 25ns 25C Inputs INO and IN1 3 3V 5V Tolerant diode protected INO IN1 trigger high low time Min 3 times MCLK plus 5ns typically 35ns IN1 used as gate signal No minimum high low time SF2000 USER MANUAL Multiplied by 10 to become MCLK User driven clock IN1 rate must be 500khz 10mhz Frequency tolerance 70ppm 4 oscilator Frequency stability 15ppm over 0 35 C ambient Input 100 240VAC 50 60 Hz Wal outst power Supply Output of 24 VDC and 1 5A USB power used none Note 1 The output capability of 150 mA per channel must be ta
28. times less than 40ns then skew should be disabled 18 SF2000 USER MANUAL Channel Status The PulseWave Channel Control window displays status for every channel Armed ready for trigger output is at inactive level Running pattern is driving the output Done pattern completed a run output is at inactive level Triggered a trigger occurred since the last press of the Update button Output is live high low level of output signal The front panel menu can also be used to display status When a channel is initially programmed or reprogrammed all the status will be false not armed not running not done and not triggered Once a channel is armed it will always be either armed running or done Once set the triggered status is only cleared by a channel reprogramming or by querying the triggered status e g the PulseWave status Update button Pattern Mode Pattern mode is used to drive the output directly from pattern memory Each pattern bit is output for a time specified by the lt bit period gt parameter Pulse Mode Pulse mode works like pattern mode except that a pulse is output for each 1 bit of the pattern The lt bit period gt parameter is the time between pulses Unlike other pulse generators the SF2000 allows you to specify a different bit period for each channel Single step Mode Single step mode generally works as normal except that a trigger is required
29. unications Digital stimulus testing Portable bench top and ATE system applications SF2000 Features The SF2000 provides the following features Voltage range 3 3V to 20 V into high impedance 100mA per channel Outputs balanced to drive 50 ohm Pattern and pulse modes Pattern bit period 20 to 42s with 10ns resolution 16k deep per channel Pattern based pulse generation pulse location determined by pattern memory Pulse width 10ns to 42s with 10ns resolution channels in base model expandable to 9 Front panel controls and LCD for stand alone operation PC control using PulseWave software provided or your test program Independent channel operation e g pulse period width trigger source etc SF2000 USER MANUAL Adjustable channel skew up to 16 77ms in 250ps steps INO and IN1 usable for trigger IN1 can be gate or master clock input Trigger on edge or level any polarity internal interval software or manually using button on front panel Trigger runs pattern once or looped Single step mode triggers per pattern bit including pulse mode Gate signal can mask trigger and or output Save load nine user defined settings Auto Start loads any one of nine user defined settings at power up SCPI programming interface for integration with LabView or other test environments Battery powered models are available Optional TCXO for high master clock accuracy and stability
30. ware is running you must refresh the application window in order for those changes to appear on your computer display Rear Panel Diagram SIGNAL FORGE SF2000 www signalforge com CH 0 OUT CH 1 OUT CH 2 OUT ON OFF 0 Figure 2 Rear Panel Rear Panel Connectors BNC connectors for output channels CHO CH1 and CH2 USB Type B USB connector Power Accepts the power plug from the wall power module On Off Power switch 13 SF2000 USER MANUAL PulseWave Software Installation PulseWave is a Windows based application which provides easy control of the SF2000 without the need for custom programming It is compatible with Windows 7 Vista XP 2000 and Server 2003 Windows 95 and NT are not supported The installation and setup procedure is as follows 1 Before you install the software and drivers a Plug in AC adapter b Connect the SF2000 to a USB port on your computer Turn on the SF2000 allow 5 secs for the SF2000 to boot before starting PulseWave 2 Install USB drivers 3 Install PulseWave software 4 Start PulseWave The first time Configure COM port AC Adapter Use only the power adapter that came with your SF2000 because adapters have different voltage outputs and power capability USB Driver Installation To install the USB drivers on your Microsoft Windows computer 1 Connect the SF2000 to your computer and turn it on Windows will find the new hardware and ask to install the
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