PureView™ Pulser-Receiver Operator Manual
Page 18
Imaginant Inc.
The transducer excitation pulse (typically) occurs 160ns after the rising edge of the Trig / Sync signal. As can
be seen in the image above (with a horizontal timescale of 100ns/division), the pulser creates a small
disturbance in the receiver output waveform (blue trace) 160ns after the Trig / Sync signal’s rising edge (purple
trace). This is what appears as a small noise burst 160ns (blue trace) after the rising edge of the (purple) Trig
/ Sync signal.
As described above, the receiver protection circuit does not allow ultrasound signals to pass through the
receiver in the interval between the two short pulses. However, to more precisely determine the point in
time when the receiver begins passing ultrasound signals, a good indication is when the random noise level in
the output signal returns to the same amplitude as before the pulser fired. As an example, the image below
shows the output signal of a PureView unit with the receiver gain set to 70dB. The horizontal time scale is
500ns / major division. The action of the receiver-protection circuit can be seen during the interval when the
noise level in the receiver output signal is reduced. Shortly after the receiver protection ends, the random
noise in the receiver output signal returns to its normal amplitude. At this point in time the receiver is once
again able to pass signals from its input through to its output.
Using JSR .Net Control Panel Software
For installation of the JSR .Net Control software, refer to the ‘PC Setup’ section of this manual.
The JSR .Net Control Panel software enables a user to remotely control a PureView instrument from the user’s
computer running the Windows operating system. In addition to the JSR .Net Control Panel program, an SDK is
available for users that wish to develop custom instrument control software.
Instrument control is provided through commands sent to the PureView instrument via the USB interface. The
available control functions are given below.