Pulsar dBi-M, Инструкция по эксплуатации

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dBi-M INSTRUCTION MANUAL
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Main Screen
The main screen is used to display real time echo trace diagnostic
information from the dBi-M transducer connected or replay recorded echo
traces previously saved.
Echo traces
To request an echo trace from the dBi- M, select the Regular Echo ‘Off’
button, this will turn on and an echo will be presented on the main screen.
The X axis represents the distance in measurement units ( P104 ) defined by
the dBi-M transducer. The Y axis represents the signal strength in mV, on
the status display this is represented as a percentage (0mV = 0% and
1,000mV = 100%). Example of an echo trace is shown below:
Raw Echo
The Raw echo is shown in red. It shows signals (echoes) reflected from
objects as peaks in the trace.
The higher the peak of the echo, the stronger the echo is. The far-left
portion of the raw echo trace is known as the ringdown. It is a result of the
ceramic crystal still vibrating from the transmit pulse when the receiver is
switched on. The ringdown region is the reason for the near blanking dead
band. As a target moves further away from the transducer, the signal
strength of the returned echo will reduce.