BNC 575 Series Especificações Página 1

1-1 575 Series Pulse Generator Operating Manual Version 5.6 Berkeley Nucleonics Corp. 2955 Kerner Blvd. San Rafael, CA 94901 (415) 453-995

5-10 5 Pulse Concepts and Pulse Generator Operations Counter Architecture Overview *Start source is: RUN/STOP key in Internal Modes External in

5-11 The T0 pulses are distributed to all of the start inputs of the Channel Timers and Mode Generators Channel Timer Functions The Channel Timer f

5-12 Navigating the 575 Front Panel Selecting Menus Parameters are grouped in menus, selectable using menu keys. To select the output channel para

5-13 (CW adjustment knob) enables the item and the DOWN arrow (CCW adjustment knob) disables the item. Alphanumeric Input Mode When the current ite

5-14 Setting Pulse Timing Parameters Pulses are defined by a delay, from their sync or start pulse to the active edge, and a width. Wid: Sets t

5-15 To set the system Internal Rate - press the yellow FUNC key, then press the RATE key, and then use the dial or number pad to specify the T0 Peri

6-16 6 575 Menu Structure System Mode Menus (FUNC + MODE key) MODE: Continuous MODE: Single Shot MODE: Burst MODE: Duty Cycle #/On #/Burst

6-17 Mode Menu Channel Enable Channel Enable Channel Enable Channel Enable Mode: Normal Mode: Single Shot Mode: Burst Mode: Duty Cycle #/On Pulse

6-18 On: Sets the number of pulses to generate before inhibiting output in Duty Cycle Mode. Off: Sets the number of pulses to inhibit before repe

6-19 Gate: Enables the GATE input for the channel by setting the method of output control used with the gating function. Logic: Sets the logic l

1-2 1 Table of Contents 1 Table of Contents ... 1-2 2 Introduc

6-20 Reference Out Menu Ref Out: T0 Pulse Ref Out: 100MHz Ref Out: 50MHz Ref Out: 33.33MHz Ref Out: 25MHz T0 Period T0 Period T0 Period

6-21 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 chan

6-22 User Options Menu 2 Auto Start Mode Decimal Mark LCD Brightness Setting the Auto Start Mode The unit may be configured to automatically start

6-23 Recall Menu (FUNC + RECALL key) Configuration # Name Help Line Recalling System Configurations Use the following procedure to recall a stored

7-24 7 Operating the 575 Quick Start - Normal Internal Rate Generator Operation The 575 has a powerful set of functions providing a number of mode

7-25 Pulse Width, Delay Enter the Channel menus by pressing the letter key. Enter the required pulse width and delay. Repeat for each output channe

7-26 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 butto

7-27 Mode: Select the Normal mode. Pressing the RUN/STOP key will now generate a continuous stream of pulses. To Use Channel Single Shot Functi

7-28 function, set the on cycle to 1 and set the off cycle to (n-1), where “n” is the divide-by-n factor. To Use the Channel Gating Function Each c

7-29 To Generate a Burst of Pulses on Every Trigger Input To generate a burst of pulses for every external trigger received set the following parame

1-3 Configuring the Channel Multiplexer ... 6-18 Channel Gate Menu ...

7-30 that occur after the pulses start are ignored. Pressing the RUN/STOP key a second time will disarm the unit. To use the External Gate to Contr

8-31 8 Programming the 575 Personal Computer to Pulse Generator Communication The 575 ships standard with an RS232 serial and USB interface. Ethe

8-32 USB Interface Overview The USB interface is standard on the 575. Before this type of communication can be used, the appropriate drivers must be

8-33 Programming Command Types and Format The 575 Pulse Generator uses two types of programming commands: IEEE 488.2 Common Commands and Standard C

8-34 *IDN?<cr><lf> SCPI Command Format SCPI Command Keywords The commands are shown as a mixture of upper and lower case letters. The

8-35 SCPI Optional Keywords Optional keywords and/or parameters appear in square brackets ( [ ] ) in the command syntax. Note that the brackets are

8-36 Programming Examples Example 1) 20 ms pulse width, 2.3 ms delay, 10 Hz, internal trigger, continuous operation. :PULSE1:STATE ON<cr>&l

8-37 575 INSTrument Commands (SCPI Command Summary) Keyword Parameter Comments :INSTrument Subsystem. Supports treating each channel as a logical i

8-38 575 System PULSe[0] Commands (SCPI Command Summary) Keyword Parameter Comments :PULSe[0] Subsystem. Contains commands to control the output pu

8-39 575 Channel PULSe[n] Commands (SCPI Command Summary) Keyword Parameter Comments :PULSe [1 / 2 / n] Subsystem. Contains commands to control the

1-4 External Input Overview ... 7-28 To Generate a Pulse on

8-40 575 SYSTem Commands (SCPI Command Summary) Keyword Parameter Comments :SYSTem :STATe? Query only. Returns the state of the machine: returns

8-41 575 DISPlay Commands (SCPI Command Summary) Keyword Parameter Comments :DISPlay Subsystem. Contains commands to control the display. :MODe

A-1 Appendix A - 575 Specifications INTERNAL RATE GENERATOR RATE (T0 period) 0.0002 Hz to 20.000 MHz RESOLUTION 10ns ACCURACY Same

A-2 SLOPE Rising or Falling GATE INPUT MODE Pulse inhibit or output inhibit POLARITY Active high/active low MODULE SPECIFIC

A-3 TRIGGER INPUT SLOPE Rising or Falling JITTER 800 ps RMS INSERTION DELAY <160 ns MINIMUM PULSE WIDTH 2 ns GATE INPUT POLAR

A-4 FUSE (Qty 2) 3.15A, 250 V Time-lag OUTPUT MODULES Standard AT20 Dual channel, TTL/CMOS & Adjustable output module Optional L8

B-5 Appendix B - Safety Symbols Safety Marking Symbols Technical specifications including electrical ratings and weight are included within the ma

B-6 IEC 417, No. 5017 Earth (ground) terminal - Primarily used for functional earth terminals which are generally associated with test and measurem

B-7 ISO 3864, No. B.3.6 Background colour - yellow; symbol and outline – black Caution, risk of electric shock - Generally used only for voltages in

C-8 Appendix C - COM Option COM Overview The COM Option for the 575 includes a GPIB and an Ethernet interface in addition to the RS232 and USB inter

1-5 System Options ... A-4 Safety Marking Symbols

C-9 Connect, Digi Device Discovery”. When the utility opens, it scans the LAN looking for Digi Ethernet modules. It may take a minute after plugging

D-10 Appendix D - DT15 (Dual Trigger Option) DT15 Overview This module option allows the “Gate” input to function as a second trigger input. For c

D-11 Threshold Level Threshold Level Trigger Edge Trigger Edge *Only enabled when TRIG mode is set to “Dual Trig”. Functions as Standard Gate Men

E-12 Appendix E - AT35 (35V Output Option) AT35 Description When the Adjustable Mode is enabled for this module, the outputs will provide an adjust

F-13 Appendix F - TZ50 (Impedance Matching Output Module) TZ50 Overview This module option allows a user to have a 50 Ohm load on the output while

G-14 Appendix G - Increment Modes Option Increment Overview The System Increment modes are a pair of special modes, which allow the delay and wid

G-15 Off: Sets the number of pulses to skip each during off cycle when in the Duty Cycle mode. Cycles: Sets the number o DC Increment Cycles to ge

G-16 Width Step Resolution 250 ps Width Incremented Range 10,000 s Delay Step Size -100 ms to 100 ms Delay Minimum Step 10 ns (-10 ns)

H-17 Appendix H - AT45 Option (45 Volt Output) AT45 Option Overview For channels with AT45 output option, the maximum frequency is limited to 100

H-18 AT45 SCPI Command Extension Summary Keyword Parameter Comments :PULSe [1 / 2 / n] Subsystem. Contains commands to control the output pulse g

2-6 2 Introduction This manual is a reference designed to familiarize you with the Berkeley Nucleonics 575 series pulse generator and is arranged so

H-19 Figure 1 (High Z 5V) Figure 2 (High Z 45V)

H-20 Figure 3 (Low Z 5V) Figure 4 (Low Z 45V)

H-21 Rise time and overshoot are tuned for best response at low impedance (low Z) Figure 5 (Rise Time versus Output Voltage) Figure 6 (Fall Tim

H-22 Figure 7 (Overshoot Versus Output Voltage)

3-7 3 Safety Issues Normal use of test equipment presents a certain amount of danger from electrical shock because testing must be performed where

4-8 4 Front Panel Overview 575 Front Panel Display Layout and Indicators A 4 line x 20 character vacuum fluorescent display module displays param

4-9 right (RIGHT) and left (LEFT) arrow keys moves the cursor to different positions within the current parameter. The NEXT key selects the next par