BNC PB-5 - Manual (Page 7)

6
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
ripple specified by the manufacturer. For high performance, the Berkeley Nucleonics
Portanim, Model AP-3, is recommended to power the PB-5.
1.5.2 Amplitude Settings
When the pulse amplitude is set near zero volts it is common to have switching
transients and clock pulse feed-through occur in the order of 10 mV. In order to
minimize these transient effects it is important to set the amplitude high (~ 10 V) and
switch in attenuation to obtain low-level pulses. It is common practice to use
attenuation to obtain low noise performance for low-level pulses. It is also preferable to
use attenuation to preserve pulse shape at low amplitudes. This is especially true when
preserving a minimum flat top width on low-amplitude tail pulses. If attenuation is not