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Setting Pulse Gate Control ......................16 Setting the System Internal Rate Generator ................16 Setting System Mode of Operation ....................16 Enabling System Trigger or Gate ....................16 Power On Configuration .......................16 Setting Auto Start Mode .......................16 4 505 Menus..............17 505 Menu Structure ..................18 CHANNEL Menu ...........................18 MODE Menu ............................18 TRIG/GATE Menu .........................18...
Introduction This manual is a reference designed to familiarize you with the Berkeley Nucle- onics 505 pulse generator and is arranged so that you can easily find the infor- mation you’re looking for. Generally, each topic has its own section, and no section assumes that you’ve read anything else in the manual.
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.
Front Panel Overview BNC 505 Front Panels Display Layout and Indicators A 2 line x 16 character, backlit LCD display module displays all system param- eters and status information. The status information is located in the upper-right corner of the display. There are two enunciators: •...
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NEXT key, selecting the next parameter in the currently displayed menu. • Channel Outputs The pulse generator output is available from BNC con- nectors on the front panel. The output is adjustable from 2V to 20V into a high impedance load. The drive impedance is 50 ohm, so if the load is 50 ohm the out- put voltage will be one-half of the set voltage.
Pulse Concepts and Pulse Generator Operation Counter Architecture Overview Internal System Tim er Internal Gate and S ystem 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 External input in External trigger modes.
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).
Numeric Input Mode When the current item is numeric, the system enters the Numeric Input Mode. In this mode data may be edited in one of two ways. Using the arrow keypad, the Left and Right arrow keys are used to select a digit to edit. The selected digit blinks to identify itself as the active digit.
Configuration # The configuration # specifies the location to store the current system configura- tion. Numbers range from 1 to n, where "n" is the number of stored configura- tions. *NOTE: The number of storage locations is model dependent; see the specifi- cations for your model.
Enabling External Gate Control • EXTin Selects external input usage for controlling T : dis- abled, edge triggered or level gated. *NOTE: When the gate disables the System Timer, the timer is reset. The gate edge, to enable the timer, will restart the System Timer, which synchro- nizes the T pulse to the gate and minimizes jitter relative to the gate.
Setting Key and Knob Volume • Key Volume Sets the key click volume. • Knob Volume Sets the parameter adjustment knob click volume. Setting Pulse Timing Parameters Within the CHANNEL menu, set the delay until the start of a pulse and the pulsewidth: •...
This allows other channels to be run continuously without interruption while generating individual pulses or a burst of pulses on the single shot or burst mode channels. Setting Pulse Gate Control Enables the use of the external input to gate the channel output (within the CHANNEL menu): •...
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• AutoStart Disable or enable the autostart feature. Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
505 Menus 505 Menu Structure CHANNEL Menu Channel Disable/enable channel output. Sync Select sync source. Delay Sets delay from sync source until pulse is started. Width Sets width of active portion of pulse. Mode Selects the channel timer mode. #/Burst Sets the number of pulses in the burst mode.
SYSTEM Menu Baud Rate Selects the RS232 baud rate. Comm Echo Enables RS232 input echo. GPIB Addr Sets the GPIB address. Key Vol Sets the key beep volume, 0 is off. Key Rate Sets the key repeat rate. Knob Vol Sets the knob beep volume.
Operating the 505 Quick Start - Normal Internal Rate Generator Operation The 505 has a powerful set of functions providing a number of modes of opera- tion. Most of these functions can be ignored if all one wants to do is generate a simple continuous stream of pules.
Edge Press the NEXT key until the Edge parameter is dis- played. Set the instrument to trigger off the rising edge or falling edge as desired. Pulse Width, Delay Enter the CHANNEL menu by pressing the FUNCTION key and then the CHANNEL key. Enter the required pulse width and delay.
Pressing the RUN key will now generate a stream of “n” pulses, at a rate speci- fied by the period parameter. To Use Duty Cycle Mode To generate a stream of pulses which oscillates on for “n” pulses and off for “m” pulses - within the MODE menu set the following parameters: Mode Select Duty Cycle for the system mode.
To Use Channel Burst Mode Function The Burst mode generates a burst of pulses every time the RUN key is pressed. If the unit is in the active, (i.e. channels which are set to the Normal mode are producing pulses), pressing the RUN key will reset the Burst counters and gener- ate a new set of pulses in sync with the other channels running in the Normal mode.
To Generate a Pulse on Every Trigger Input To generate a pulse on every external trigger received, set the following param- eters: - within the Mode menu: Mode Select the Single Shot mode. - within the TRIG/GATE menu: EXTin Select Triggered mode. Level Set the trigger threshold level.
- within the TRIG/GATE menu: EXTin Select Triggered mode. Level Set the trigger threshold level. Edge Select which edge, rising or falling, to trigger on. Pressing the RUN key will arm the unit. Once the unit is armed, it will begin generating pulses after an external trigger is received.
Programming the 505 Talking to the Pulse Generator The 505 comes standard with an RS232 serial interface and an optional GPIB interface. 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 (SCPI).
Programming Command Types and Format The 505 Pulse Generators use two types of programming commands: IEEE 488.2 Common Commands and Standard Commands for Programmable Instruments (SCPI). The format is the same for both the RS232 interface and the optional IEEE 488 interface. Hyperterminal (in Windows) or any other generic terminal program may be used to interactively test the commands using the RS232 interface.
Any parameter may be queried by sending the command with a question mark appended. For example: :PULSE1:STATE? Will return: 1 <cr><lf> :PULSE1:WIDT? <cr><lf> Will return: 0.000120000 <cr><lf> :PULSE1:POL? <cr><lf> Will return: NORM <cr><lf> SCPI Keyword Separator A colon (:) must always separates one keyword from the next lower-level key- word.
<boolean value> Represents a single binary condition that is either true or false. True is represented by a 1 or ON; false is rep- resented by a 0 or OFF. Queries return 1 or 0. <identifier> Selects from a finite number of predefined strings. Error Codes The unit responds to all commands with either: ok <cr>...
To arm the instrument use either of the following commands: :PULSE0:STATE ON <cr> <lf> arms the instrument :INST:STATE ON <cr> <lf> alternate form A software generated external trigger can be generated by using the following command: *TRG <cr> <lf> generates a software external trigger 505 SCPI Command Summary <...
IEEE 488.2 Common Commands c i f c i f l l i o l l e l i < > d i l < > e l i d i l Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
Appendix A - Specifications 505 Specifications DELAYS CHANNELS 2, 4 or 8 independent outputs, with digitally con trolled delay and pulsewidth MODES Normal, Single, Shot, Burst, Duty Cycle DELAY 0 to 999.9999999 sec PULSEWIDTH 100 ns to 999.9999999 sec RESOLUTION 10 ns ACCURACY 10 ns + .0001 setpoint...
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COMPUTER INTERFACE RS232 4800, 9600, 19200, 38400 Baud. All instrument functions and settings may be con trolled over the interface bus. GENERAL STORAGE Storage for 6 complete configurations may be stored and recalled from the front panel or the computer interface. DIMENSIONS 7.5”...
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