FAST ComTec MCA4A, Руководство пользователя

Страница: 22 / 107

Installation procedure
2.5.4 Measuring a typical Pre-Amplifier Signal
We will now use the MCA4A's internal test pulser to produce pre-amplifier like input signals and setup the
pole zero filter and the trapezoidal shaper.
Since most pre-amplifier signals are typically negative we switch to the negative unipolar pulse polarity and
use the scope mode to see how the input signals look like. In the ADC Settings dialog select
Neg. unipolar,
set PHA to Maximum and Scope-Mode with Falling edge trigger. Then setup the Shaper with Software (ref.
Fig. 2.19).
When clicking into the Testpulser.. checkbox a Test pulser setup window opens. Setup the pulser with a fast
rise time of "2", a long fall time of "200", an amplitude setting of "50" and a period of "5" x 32.8µs as in Fig.
2.20.
22
F
ComTec GmbH
Fig. 2.19: Setup the internal Test Pulser