PureView™ Pulser-Receiver Operator Manual
Page 13
Imaginant Inc.
PureView Receiver Output, Trig/Sync, and USB Connectors
PureView employs the three connectors shown in the following image for interfacing with other
instrumentation. These three connectors are a Mini-B USB connector for instrument power and control, and
two SMA coaxial connectors labeled Output and Trig / Sync.
PureView receives its power via the USB interface connector and is controlled through this same interface.
The PureView Receiver’s output signal is available on the SMA coaxial connector labeled ‘Output’. The
Receiver circuitry amplifies signals from either the T/R or Through input connectors and presents the amplified
signals on the Output connector. A high-quality 50 Ω coaxial cable should be employed to make a connection
from the PureView Output connector to other instrumentation such as an oscilloscope or waveform digitizer.
This 50 Ω coaxial cable must be terminated with a 50 Ω load to properly terminate the coaxial cable. The
PureView Receiver can provide a linear output signal of +/- 500mV maximum into a 50 Ω load, and signals of
interest should not be amplified beyond these limits. Over-amplification of signals will lead to signal
distortion.
The Trig / Sync coaxial connector is used to synchronize the PureView unit with external hardware for External
Triggering and Internal Triggering.
External Triggering: When the PureView pulser is set to External Trigger mode, an external trigger signal
must be applied to the Trig / Sync SMA connector to cause the pulser to produce a transducer-excitation
pulse on the T/R connector. The trigger signal must be nominally at 0V (ground) and consist of a positive-
going pulse between 1V and 5V in amplitude. The pulser will then generate a negative-going transducer-
excitation spike-pulse on the T/R connector in response to each positive transition of the trigger signal.
Additional details of this mode of operation are contained in the Operation section.
Internal Triggering: When the PureView pulser is set to Internal Trigger mode, the pulser will generate a
negative-going transducer-excitation spike-pulse on the T/R connector at a rate defined by the Pulse