MNX10010 / Rev B
4/11/2008
8
HIGH FREQUENCY RESPONSE
The high frequency response of any piezoelectric system is determined by a
number of factors. These are:
1. The response characteristics of the sensor itself,
2. The length and type of cable between the sensor and the power unit,
3. The length and type of cable from the sensor to the readout, (in
unbuffered units such as the 4103B),
4. The amplitude of the sensor signal, and,
5. The level of drive current to the sensor.
With the PS03, the user has no choice of drive current settings since the sensor
drive current is fixed at approximately 2 mA.
This amount of current should be sufficient to drive most sensors (except for
some of the high frequency pressure sensors) to their full frequency range driving
100 ft. of combined input and output cable.
Experimentation is the only sure way to determine the effect of these various
parameters on the high frequency response of the measurement system.
Figure 4. PS03 Power Supply Diagram