Parameters; Pulse Power; Pulse Width / Cycles; Gain - US Ultratek USB-UT350T User Manual

4 Parameters

4.1

Pulse Power

Pulse power ranges from -40V to -300V peak to peak in 256 steps. The response echoes
are stronger when a higher voltage is used, however some transducers become saturated
and require lower voltage settings.
4.2

Pulse Width / Cycles

For the Standard Pulser:
The pulse width can be set to any value between 50ns and 500ns in increments of 20ns.
The pulse width has a close relationship with the frequency of the transducer which is
represented in the following formula:
Where W is the pulse width in ns and f
For example, if you have a 5MHz transducer, the appropriate pulse width would be
calculated as follows:
For the Tone Burst Pulser:
The number of cycles corresponds to how many oscillations the pulse will emit. This
number defines the half-cycles of the period. A value of 4 will result in two complete
cycles – positive, negative, positive, negative when the polarity is positive or the reverse
when the polarity is negative.
4.3

Gain

Gain is used to control the amplitude of the signal. It ranges from -20dB to 80 dB in
increments of 0.01dB. Adjust the gain until the signal fits in the display window without
any saturation.
4.4

Frequency (Tone Burst Pulser Only)

Sets the frequency of the tone burst pulser.
USB-UT350 User's Guide
Revision 1.77 – 09/30/2009
=
W 500 / f
is the transducer frequency in MHz.
t
= =
W 500 / f 500 5 /
t
t
=
100 ns
4-1