6.1.4
PRF Control
A rotary switch that selects the frequency at which the pulser fires when internal trigger operation is
selected. The PRF values range from 100 Hz to 5 kHz.
6.1.5
Int / Ext Switch
A toggle switch that selects between internal trigger (PRF) and external trigger sources for the
pulser.
6.1.6
Echo / Through Switch
A toggle switch that connects the receiver input to the T/R BNC connector or Through BNC
connector for Pulse/Echo or Through mode operation respectively.
6.1.7
Rel. Gain Controls
These controls are a pair of rotary switches that set the receiver gain. The receiver gain will be the
value indicated by the switches minus 13 dB.
6.1.8
HP Filter Control
This control is a rotary switch that sets the receiver high-pass filter to the value indicated.
6.1.9
LP Filter Control
This control is a rotary switch that sets the receiver low-pass filter to the value indicated.
6.1.10
Pulse Amplitude Control
This control is a rotary switch that sets the amplitude of the excitation pulse generated by the pulser.
The amplitude is adjustable between 100V and 475V or 100V and 900V depending on the pulser
option installed.
6.1.11
Pulse Energy and Pulser Impedance Control
This control is a rotary switch that sets the energy of the excitation pulse generated by the pulser, and
the pulser impedance. This switch combines the pulser energy and pulser impedance functions. The
High Z impedance range provides for better transducer damping while the Low Z impedance range
provides for better signal strength.
6.1.12
Damping Control
This control is a rotary switch that adjusts the damping applied to the transducer.
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