Olympus OmniScan SX, Руководство пользователя

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DMTA-20043-01EN [U8778624], Rev. B, May 2013
56 Chapter 6
Table 8 on page 56 and Table 9 on page 56 detail the acoustic specifications of the
pulser, receiver, and beam formation, for both UT and PA modes.
When the UT channel is used in pulse-echo mode, pulses occur on both the
P
1 and
R
1
connectors. When pulse-echo mode is selected, Olympus recommends using only the
P
1 connector to connect the probe.
Table 8 Acoustic specifications — UT channel using UT connector
Pulser
Voltage 95 V, 175 V, and 340 V
Pulse width Adjustable from 30 ns to 1000 ns;
resolution of 2.5 ns
Fall time < 10 ns
Pulse shape Negative square pulse
Output impedance < 30
Ω
Receiver
Gain range 0 dB to 120 dB maximum input signal
34.5 Vp-p (full-screen height)
Input impedance 60
Ω
in pulse-echo mode
50
Ω in pulse-receive mode
System bandwidth 0.25 MHz to 28 MHz (–3 dB)
Table 9 Acoustic specifications — PA channel
Pulser
Voltage 40 V, 80 V, and 115 V
Pulse width Adjustable from 30 ns to 500 ns;
resolution of 2.5 ns
Fall time < 10 ns
Pulse shape Negative square pulse