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Summary of Contents for BNC PB-5
- Page 1 Instruction Manual - Rev. 3 Model PB-5 Precision Pulse Generator Berkeley Nucleonics Corporation 2955 Kerner Blvd., San Rafael, CA 94901 Phone: 415-453-9955, Fax: 415-453-9956, Email: info@berkeleynucleonics.com, Web: www.berkeleynucleonics.com...
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Page 2: Table Of Contents
TABLE OF CONTENTS SECTION 1. OPERATIONS Page 1.1 Introduction 1.2 Principles of Operation 1.3 Function of Controls and Connectors 1.4 Menu Selections 1.5 Optimum Performance 1.6 Testing a Preamplifier 1.7 Measuring Differential Linearity of a MCA SECTION 2. RS-232 COMMANDS SECTION 3. -
Page 3: Section 1. Operations
OPERATIONS 1.1 INTRODUCTION The PB-5 sets a new standard for nuclear pulse generators. It offers full digital controlla- bility with a built-in ramp generator. It provides tail and flat top pulses with excellent integral linearity and extremely low amplitude change with temperature. The PB-5 is capable of testing the stability, linearity and resolution of the most demanding spec- troscopy circuits and instrumentation. - Page 4 Attenuator 0, x2, x5, x10, x10 (range = 1 to 1000) FIGURE 1. Block Diagram of Model PB-5 Precision Pulse Generator The Trigger Out Generator provides a pulse synchronized with the beginning of the rep- rate generator or the External Pulse Input. This provides synchronization with the target instrument.
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Page 5: Function Of Controls And Connectors
3.0 µs (see Section 1.5.4). Three BNC connectors are located on the front panel. The PULSE OUT is reverse termi- nated in 50 ohms and provides 0-10 volts out (0-5 volts into 50 ohms). The EXT TRIG is used in conjunction with the menu to trigger the pulser at a given threshold and fre- quency up to 500 kHz. -
Page 6: Menu Selections
None 1.4 MENU SELECTIONS Figure 2. shows the two level menu employed by the PB-5. The menu is selected by using the up/down keys on the keypad and pressing enter or by using the spinner/switch knob. Operating solely by the spinner is most convenient since rotating and depressing the push switch, all in one motion, makes the menu selection easy. -
Page 7: Optimum Performance
Clamp [ON, OFF] FIGURE 2. Model PB-5 Menu 1.5 OPTIMUM PERFORMANCE To achieve optimum performance of the model PB-5 several factors should be considered as follows: 1.5.1 NIM Power Supply It is important that the NIM power supply meet all regulation, long term stability, and rip- ple specified by the manufacturer. -
Page 8: Testing A Preamplifier
These conditions are fulfilled by the Model PB-5 which provides a rise time of 50 ns com- pared with the usual preamplifier decay time-constant of 50 µs or more. - Page 9 or more channels with respect to the average width of all the channels. DNL can be deter- mined by manually setting a pulse amplitude to both edges of each channel and calculat- ing the width of each channel individually. This method is subject to error since it is dif- ficult to accurately find the edges of each channel particularly due to system noise.
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Page 10: Section 2. Rs-232 Commands
Nx is generally taken as the worst case deviation from the average. Occasionally there is a "dropped" channel or an odd-even effect. This type of analyzer defect is easily observed with the PB-5 DNL test but this type of anomaly should not be used for the calculation of DNL. -
Page 11: Section 3. Specifications
set ramp time 100 set ramp cycles 10 exrcute ramp recall factory defaults help Values given for time in the above examples are in nanoseconds SECTION 3 SPECIFICATIONS Rep Rate: 2.0 Hz to 500 kHz Width: 100 ns to 1 ms, continuously variable Delay: 250 ns to 10 ms Rise Time:... - Page 12 450 mA - 12 V Mechanical: Triple-width AEC NIM module 4.05" wide x 8.70" high in accordance with TID-20893 (Rev 3.) Weight: 3 lbs. Net, 6 lbs. Shipping Portable Power Supply Available: See BNC Model AP-3 Portable NIM Power Supply...
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