Olympus OmniScan MX2, Руководство пользователя

Страница: 201 / 228

DMTA-20015-01EN [U8778402], Rev. J, January 2014
OMNI-M2-PA1664/16128/32128/32128PR Module Specifications 189
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 one
probe on the
P
1 connector.
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 71 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
Output impedance For 32128PR model:
35
Ω in pulse-echo
30 Ω in pitch-catch
For other models:
25
Ω
Receiver
Gain range 0 dB to 80 dB maximum input signal 550 mVp-p (full-
screen height).
Input impedance For 32128PR model:
50
Ω in pulse-echo
90 Ω in pitch-catch
For other models:
65
Ω
System bandwidth 0.6 MHz to 18 MHz (–3 dB)
Table 70 Acoustic specifications — UT channel using UT connector (continued)