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Oscillations, Waves, and Interactions - GWDG

Oscillations, Waves, and Interactions - GWDG

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Multistep association of cations <strong>and</strong> anions 341<br />

Figure 6. Block diagram of the semi-automatic comparator set-up for absolute ultrasonic<br />

absorption coefficient measurements between 1 MHz <strong>and</strong> 5 GHz [53,54]: 1, signal generator;<br />

2, modulator; 3, broadb<strong>and</strong> power amplifier; 4, pulse generator; 5, change-over switch; 6,<br />

variable attenuator; 7, impedance transformer; 8, specimen cell with 9, transmitter unit<br />

prepared for parallel adjustment to 10, receiver unit; 11, digital distance meter with 12,<br />

control unit; 13, stepping motor drive or piezo-translator with 14, control unit; 15, fixed<br />

coaxial attenuator for impedance matching; 16, high-precision adjustable piston attenuator;<br />

17, superheterodyne receiver; 18, boxcar integrator; 19, switch driver <strong>and</strong> control; 20, trigger<br />

<strong>and</strong> control-pulse generator; 21, frequency counter; 22, process control computer.

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