Olympus OmniScan MX, User Manual

Page: 174 / 230

DMTA-20015-01EN [U8778402], Rev. M, February 2017
Appendix I 162
I.1 Acoustic Specifications
This section lists the acoustic specifications for the pulser, receiver, and beam
formation (see Table 52 on page 162).
Table 52 Acoustic specifications — OMNI-M-PA32128PR
Pulser
Voltage Low: 45 V
High: 90 V
Pulse width Adjustable from 30 ns to 500 ns; resolution
of 2.5 ns
Fall time <5 ns
Pulse shape Negative square pulse
Output impedance <30
Ω
Receiver
Gain range 0 dB to 74 dB in steps of 0.1 dB, maximum
input signal 1.3 Vp-p (pulse-echo channel)
and 0.9 Vp-p (pitch-catch channel)
Input impedance 50
Ω
(pulse-echo channel) and 150
Ω
(pitch-
catch channel)
System bandwidth 0.53 MHz to 21 MHz, ±10 % ( − 3 dB)
Beam formation
Scan type Sectorial and linear
Aperture 32 elements
Number of elements 128 elements
Number of focal laws 256
Delay range transmission 0 µs to 10 µs in 2.5 ns increments
Delay range reception 0 µs to 10 µs in 2.5 ns increments