The worlds most innovative manufacturer of ultra fast counting systems

printed at  25.07.2008
www.fastcomtec.com

BNC Model PB-5, Programmable Precision Pulse Generator, Sliding Pulser

FEATURES

  • Count Rate 2 Hz - 500 kHz
  • Full digital Controllability
  • Built-in Ramp Generator
  • Rise Time 50 ns - 10 ms
  • Decay Time Constant 0.5
  • ms - 1000 ms
  • Output Voltage Range 0 - 10 V, 0 - 5 V into 50 ohms
  • Flat-top or Tail Pulse
  • Output Polarity Positive or Negative
  • Integral non-linearity: +/- 15 ppm
  • Temperature Stability: +/- 5 ppm / oC

DESCRIPTION

The PB-5 sets a new standard for precision pulse generators. It offers full digital controllability with a built-in ramp generator for linearity Testing. It provides tail and flat top pulses with outstanding 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 spectroscopy circuits and instrumentation. It is the successor to the industry standard, PB-4, and to the 9010.
The 4x16 LCD display, keypad, and a spinner knob provide a user interface that is easy to use. RS232 interface is also standard along with memory that will store and recall nine complete pulse setups.

The Model PB-5 provides unprecedented performance in a precision pulse generator. It includes a full-featured, highly flexible ramp generator and programmability. As a precision pulse generator, the PB-5 surpasses or equals all existing designs in the important performance areas of resolution, linearity and stability. The pulse repetition rates, which are variable over a broad range, go up to 0.5 MHz. The higher rates are required when testing for MCA and PHA linearity because of the high number of data points required for a statistically valid test.

The built-in ramp generator allows you to control ramp duration, the number of ramps and the ramp limits. Now you can test the entire range of your system or just a portion of that range. This ramp generator and precision pulse generator combination allows you to tackle the most demanding applications. The new user interface is intuitive and easy-to-use. Parameters can be selected and changed by spinner knob and/or keypad pushbuttons. Example of parameters displayed are shown below.

Ramp Settings

Pulse Settings

Trigger Settings

Start
Stop
Ramp Time

# of Cycles
V/KeV

Amplitude
Rate
Width
Delay
Clamp

Risetime
Falltime
Polarity
Attenuation

External Trigger
External Gate
Internal Clock

One Pulse
Threshold

 SPECIFICATIONS

INPUTS and OUTPUTS

External Trigger:
0 to 500 kHz, +100 mV to +10 V.
Threshold adjustable +3.5 V in 0.1 V steps.

Amplitude:
0.0 to 10.0 V (0 to 5 V into 50 ohms)
Scaleable in energy units (keV)
Resolution 155 mV

Trigger Out:
+5 V unterminated; +2.2 V into 50 ohms,
width 200ns.

GENERAL

Amplitude Characteristics:
Jitter: +/- 10 ppm
Integral non-linearity: +/- 15 ppm
Temperature stability: +/- 5 ppm/oC from 20 oC to 45oC.

Power Requirements:
+24 V at 170 mA,
-24 V at 150 mA,
+12 V at 450mA,
-12 V at 5 mA

PHYSICAL

Size:
Triple-width AEC NIM module 4.05" wide x 8,70" high in accordance with TID-20893 (Rev. 3).

Weight:
3.5 lbs. net; 6lbs. Shipping.

SETTINGS

Attenuation:
0, 2, 5, 10, 20, 50, 100, 200, 500, 1000

Rep Rate:
2 Hz to 500 kHz

Rise Time (10-90%):
50 ns to 10 ms, in 8 steps.

Decay Time Constant (100-37%):
0.5 to 1.0 ms in 11 steps.

Pulse Type:
Flat-top or Tail Pulse
In flat-top mode, both rise time and decay time are adjustable. In tail pulse mode, rise time is a fixed 50 ns, decay time is adjustable.

Polarity:
Positive or Negative.

Width:
100 ns to 10 ms

Delay:
250 ns to 10 ms

Modes:
Single pulse via a front panel pushbutton
Internal Rep Rate
External Trigger
External Gate (same pulse requirements as Ext Trig)
Clamped baseline option to bring the baseline to zero prior to the next pulse

Internal Ramp:
adjustable start and stop points;
adjustable ramp period 90-900 s;
selectable number of ramp cycles;
ramp in keV or volts

Stored Settings:
Up to 9 parameter configurations with recall, stores parameters in use at shutdown for atuomatic recall when powered on

Remote:
RS232 at 9600 baud

Overview Nuclear Pulse-Generators