BNC 575-2C Operating Manual

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Berkeley Nucleonics 575-2C

Digital Delay / Pulse Generator

A l l t r a d e m a r k s , b r a n d n a m e s , a n d b r a n d s a p p e a r i n g h e r e i n a r e t h e p r o p e r t y o f t h e i r r e s p e c t i v e o w n e r s .

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Summary of Contents for BNC 575-2C

Page 1 Berkeley Nucleonics 575-2C Digital Delay / Pulse Generator In Stock New From Surplus Stock Open Web Page https://www.artisantg.com/67892-1 A l l t r a d e m a r k s , b r a n d n a m e s , a n d b r a n d s a p p e a r i n g h e r e i n a r e t h e p r o p e r t y o f t h e i r r e s p e c t i v e o w n e r s .
Page 2 575 Series Pulse Generator Operating Manual Berkeley Nucleonics Corp. 2955 Kerner Blvd. San Rafael, CA 94901 (415) 453-9955 phone (415) 453-9956 fax www.berkeleynucleonics.com June 2007 Bootrom V 1.02 Firmware V 1.20 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
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Page 8 This manual is a reference designed to familiarize you with the Berkeley Nucle- onics 575 series pulse generator and is arranged so that you can easily find the information you re looking for. Generally, each topic has its own section and no section assumes that you ve read anything else in the manual.
Page 9 Safety Issues Normal use of test equipment presents a certain amount of danger from electri- cal shock because testing must be performed where exposed voltage is present. An electrical shock causing 10 milliamps of current to pass through the heart will stop most human heartbeats.
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Page 12 575 Front Panels Display Layout and Indicators A 4 line x 20 character vacuum fluorescent display module displays parameters and status information. The status information is located in the upper-left corner of the display, between the two brackets. There are three enunciators: Vertical Arrow Indicates there are additional pages to the current menu.
Page 13 select the first character, then use the right arrow to shift to the next position and enter the next letter. When data entry is complete the ENTER key must be pressed. Rotary Adjustment Knob An alternate to the Arrow Keypad, the Rotary Adjustment Knob may be used to adjust the current parameter.
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Page 16 Counter Architecture Overview Internal System Timer Internal Gate and System Mode To Pulse Start Generator Command External Input Start Output Output Gate Channel Timers and Channel Pulses Mode Generators *Start source is: RUN button in Internal Modes * Start source is: RUN button in Internal Modes External input in External trigger modes External input in External Trigger modes *TRG command via Serial/GPIB access...
Page 17 Channel Timer Functions The Channel Timer functions as a non-retriggerable, delayed, one shot pulse generator. This means that the timer will only generate one delayed pulse for every start pulse received. Once the channel timer has started counting, addi- tional start pulses will be ignored until the pulse has been completed (non- retriggerable).
Page 18 Menus may include a number of different pages. Each page containing up to four parameters. The status block in the upper-left corner of the display shows a vertical arrow if the current menu contains additional pages. To select the next page, press the channel button again or select the same menu pressing the FUNC key and the channel/menu key again.
Page 19 D E F d e f 3 G H I g h i 4 J K L j k l 5 M N O m n o 6 P Q R S p q r s 7 T U V t u v 8 W X Y Z w x y z 9 0 1 2 3 4 5 6 7 8 9 .
Page 20 Out: Selects between TTL/CMOS mode and Adjustable mode when both are available on a single output. Pol: Sets the voltage polarity of the pulse, active high or ac- tive low. Note: All outputs are positive - negative volt- ages are not supported. Ampl: In adjustable mode, it sets the unloaded output voltage.
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Page 22 575 Menu Structure System MODE Menus To Mode To Mode To Mode To Mode MOD E: MOD E: Single MOD E: D uty MOD E: Burst C ontinuous Shot C ycle # / On # / Burst # / Off CHANNEL Menus P u ls e P u ls e...
Page 23 RATE Menu Rate Source Reference Out Source Ref Out To Period TRIG Menu Trig Mode Trig Mode Trig D isabled Trig: <trig mode> Threshold E dge GATE Menu Gate Mo de Gate Mo de Gate D isabled Gate: E nabled Threshold P olarity SYSTEM Menus...
Page 24 System Mode Menu To M o d e To M o d e To M o d e To M o d e M O D E : M O D E : S ing le M O D E : D uty M O D E : B urst C o ntinuo us S ho t...
Page 25 Enabling Channel Output At the top of each of the channel menu pages is a parameter to enable or dis- able the channel. Each channel may be individually controlled. Setting the Channel Timing Parameters To define a pulse requires two parameters: the delay to the active edge and the width of the pulse.
Page 26 Mux: Enable/disable bitfield. Advanced Channel Menus Advanced Advanced Timing Timing Channel Gated Operation Channel Gated Operation Paramete- Parameters Channel Channel Channel Enable Channel Enable Enable Enable Sync SyncSource Gate Enable: Di sabled Gate Enable: <method> Source Gate Polari ty Setting the Sync Source Although each channel receives its start pulse from the internal T pulse, logically the start pulse can be assigned such that the delay entered is relative to the T...
Page 27 Enabling System Gate Enables the use of the GATE input as a trigger inhibit or output control for all channels simultaneously, or on a per channel basis. Mode: Selects between disabling the GATE inputs and method of output control Level: Sets the gating threshold.
Page 28 System Menu Comm. Comm. Comm. Keypad Misc. Parameters Parameters Parameters Parameters Parameters Interface: RS232 Interface: USB Interface: GPIB Key Repeat Rate Auto Start Baud Rate Address Key Volume Decimal Mark Echo Enable Knob Volume LCD Brightness Setting System Communication Parameters The 575 comes with a standard RS232 serial port and USB port.
Page 29 Store Menu S to re M e n u C o nfig ura tio n # N a m e H e lp L ine Storing a Configuration Use the following procedure to store a complete system configuration: Set all parameters to the desired value. Select a configuration number.
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Page 32 Quick Start - Normal Internal Rate Generator Operation The 575 has a powerful set of functions providing a number of modes of opera- tion for the internal or System rate generator (T ). Most of these functions can be ignored if a simple continuous stream of pules is required. Starting from the default settings, which can be recalled by recalling configuration 0, the following parameters need to be set: Pulse Width, Delay...
Page 33 Edge Press the NEXT key until the Edge parameter is high- lighted. Set the instrument to trigger off the rising edge or falling edge as desired. Pulse Width, Delay Enter the Channel menus by pressing the letter key. Enter the required pulse width and delay. Repeat for each output channel.
Page 34 To Use System Burst Mode Function The RUN/STOP button generates a stream of n T pulses, where n is speci- fied by the Burst parameter. The rate is specified in the Rate menu. Pressing the RUN/STOP button while the burst is in process will stop the output. After the burst has been completed, pressing the RUN/STOP button will generate an- other burst.
Page 35 Wid: Set the desired pulsewidth. Mode: Select the Normal mode. Pressing the RUN/STOP key will now generate a continuous stream of pulses. To Use Channel Single Shot Function The Single Shot mode generates a single pulse every time the RUN/STOP key is pressed.
Page 36 Note: Older Quantum Composers pulse generators had a divide-by-n func- tion. The duty cycle mode is a more general case. To reproduce the divide- by-n function, set the on cycle to 1 and set the off cycle to (n-1), where n is the divide-by-n factor.
Page 37 To Generate a Burst of Pulses on Every Trigger Input To generate a burst of pulses for every external trigger received set the following parameters: -within the Mode menu Mode: Select the Burst mode. Burst: Set the number of pulses to generate in each burst.- within the Rate menu Per: Set the period between pulses.
Page 38 To use the External Gate to Control the System The external gate may be used to control the output of the unit. To gate the system timer: - within the Gate menu Mode: Select Gate Menu Gate: Select active high or active low. Level: Set the threshold voltage for the external input.
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Page 40 Personal Computer to Pulse Generator Communication The 575 comes standard with RS232 and USB; Ethernet and GPIB interfaces are optional. All menu settings can be set and retrieved over the computer interface using a simple command language. The command set is structured to be consistent with the Standard Commands for Programmable Instruments.
Page 41 install the USB drivers, and make that COM port number available for typical RS232 communication to the pulse generator. Hyperterminal or other common software may be used. When communicating through the mapped COM port over USB, the baud rate for the communication port used by the USB chip must match the baud rate for the COM port on the pc.
Page 42 The Ethernet module used is a Digi Connect ME module supplied by Digi Connectware, Inc. There are several ways to successfully communicate with the pulse generator over Ethernet. The two most popular methods are raw TCP/IP (such as Labview or programming with VISA libraries) and by mapping a pc COM port using the Digi Connectware s Realport Drivers .
Page 43 The command string is parsed and executed after reading these characters. These characters are the carriage return and linefeed . They are ascii charac- ter set values 13 and 10 respectively (hex 0x0D and 0x0A). All command strings need to have these characters appended. When the pulse generator responds to a command, whether it is a query or a parameter change, it also appends its return strings with these characters.
Page 44 SCPI Command Format SCPI commands control and set instrument specific functions such as setting the pulsewidth, delay and period. SCPI commands have a hierarchical structure composed of functional elements that include a header or keywords separated with a colon, data parameters and terminators. For example: SCPI Format :PULSE1:STATE ON <cr>...
Page 45 After power-up or reset (*RST) The instrument default is channel #1. SCPI Parameter Types The following parameter types are used: <numeric value> Accepts all commonly used decimal representation of numbers including optional signs, decimal points and scientific notation: 123, 123e2, -123, -1.23e2, .123, 1.23e-2, 1.2300E-01.
Page 46 Example 2) 25 s pulsewidth, 0 delay, external trigger, one pulse for every trigger. :PULSE1:STATE ON <cr> <lf> enables channel A :PULSE1:POL NORM <cr> <lf> sets polarity to active high :PULSE:WIDT 0.000025 <cr> <lf> sets pulsewidth to 25 s :PULSE1:DELAY 0 <cr> <lf> sets delay to 0 :PULSE0:MODE SING <cr>...
Page 47 575 SCPI Command Summary Std/ Keyword Parameter Comments Subsystem. Contains commands to control the output pulse generation. Commands [:PULSe] [0] without suffix refer to the currently selected logical instrument. See INSTrument subsystem. Enables / Disables the output for all channels. :STATe <boolean value>...
Page 48 575 SCPI Command Summary S td / K e y w o r d P a r a m e te r C o m m e n ts N e w S u b s y s te m . C o n ta i n s c o m m a n d s to c o n tr o l th e o u tp u t p u ls e g e n e r a ti o n .
Page 49 575 SCPI Command Summary S td / K e yw o rd P a ra m e te r C o m m e nts N e w :S YS Te m S td Q ue ry o nly. R e turns the s ta te o f the m a c hine : re turns "...
Page 50 Std/ Keyword Parameter Comments Subsystem. Contains commands to control :DISPlay the display. Enables/Disables automatic display update. When true, front panel display is updated with :MODe <boolean value> New serial command parameter changes. Setting to false decreases response time. Query only. Forces update of display. Use :UPDate? when mode is false.
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Page 52 575 Specifications Pulse Generation RANGE DELAY 0 - 1000s WIDTH 10ns - 1000s RESOLUTION 250ps TIMEBASE 50MHz TIMEBASE ACCURACY 25PPM RMS JITTER 400ps PULSE INHIBIT DELAY 250ns OUTPUT INHIBIT DELAY 250ns INTERNAL RATE GENERATOR RATE 0.0002Hz to 20.000MHz RESOLUTION ACCURACY Same as timebase JITTER 200ps...
Page 53 EXTERNAL INPUTS TRIGGER INPUTS NUMBER 0, 2 or 4 RATE DC to 1/ (0.2us + longest delay) THRESHOLD 0.2 to 15VDC MAXIMUM INPUT VOLT. 60V Peak RESOLUTION 10mV IMPEDANCE 1000 ohm SLOPE Rising or Falling IMPEDANCE 1000 ohm JITTER 800ps RMS INSERTION DELAY 160ns MINIMUM PULSE WIDTH 2ns...
Page 54 STANDARD FEATURES/FUNCTIONS COMMUNICATIONS USB/RS232 GLOBAL GATES/TRIGGERS 2 Global Gate/Trigger Inputs CHANNEL GATES/TRIGGERS Optical/Electrical Available (5ns Jitter) EXTERNAL CLOCK IN 10MHz - 100MHz User selectable in descrete values V in - 3V min EXTERNAL CLOCK OUT 10MHz - 100MHz User selectable in descrete values COMMAND SET COMPATIBILITY Backwards Compatible...
Page 55 Safety Marking Symbols Technical specifications including electrical ratings and weight are included within the manual. See the Table of Contents to locate the specifications and other product information. The following classifications are standard across all QC products: Indoor use only Ordinary Protection: This product is NOT protected against the harmful ingress of moisture.
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Page 59 AT35V Output Module When the Adjustable Mode is enabled for this module, the outputs will provide an adjustable output from 5 volts to 35 volts. The pulse width can be set over the standard range of the unit, but the 35 volt output will self limit to approximately 4 s with some droop.
Page 60 DT15 Dual Trigger Module This module option This module option allows the Gate input to double as a second trigger input. For consistency, the enabling menu for this option is located under the Trigger menu structure. Once you have enabled the trigger functionality of the unit, both the Gate input and the Trig input can act as trigger inputs.
Page 61 575 SCPI Dual Trigger Command Summary S td / K e y w o r d P a r a m e te r C o m m e n ts N e w G e n e r a te s a s o ftw a r e tr i g g e r p u ls e fo r th e T R IG i n p u t * T T G N e w o n ly.
Page 62 TZ50 Impedance Matching Output Module This module option allows a user to have a 50 Ohm load on the output while maintaining an output amplitude of at least 4 Volts while in the TTL/CMOS mode. All other functionality of the module is the same as the AT20 modules, including output while using the AdjustableMode Function of the channels.
Page 63 Ethernet Interace Overview An Ethernet interface is optional on the 575. When this option is chosen, the USB port is replaced by the Ethernet port. The Ethernet module used is a Digi Connect ME module supplied by Digi Connectware, Inc. There are several ways to successfully communicate with the pulse generator over Ethernet.
Page 64 Programming Command Types and Format The 575 pulse generator uses two types of programming commands: IEEE 488.2 Common Commands and Standard Commands for Programmable Instruments (SCPI). The format is the same for all interfaces. Hyperterminal (in Windows) or any other generic terminal program may be used to interactively test the commands using the RS232 interface.
Page 65 IP Address and Raw TCP/IP Connection This document describes one of the most popular methods of setting up Ethernet communication for the Berkeley Nucleonics pulse generators. The method discussed is Raw TCP/IP communication. The Ethernet module used in Quantum Composers pulse generators is a Digi Connect ME device manufactured by Digi International, Inc.
Page 66 Figure 1: Digi Device Discovery utility displaying Digi module discovered on the LAN. From this point, a web interface can be opened, allowing access to configura- tion options for the Digi module. If you are required to enter a username and password, they are as follows: Username: root Password: dbps...
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