DOP3000 series
Model 3000
Technical specifications

Emission
Emitting frequency

Without package "Variable frequency"
Fixed, defined at purchase between 0.5, 1, 2, 4, 8 and 10 MHz

with "Variable frequency" package installed
variable between 0.45 MHz and 10.5 MHz, with a resolution of 1 kHz
Emitting power 3 levels. Approximative instantaneous maximum power for setting: low = 0.5 W, medium= 5 W, high= 35 W
Number of emitted cycles

Without package "Extended resolution"
Fixed, 4 cycles

With "Extended resolution" installed
2, 4 or 8 cycles
Pulse repetition frequency

Without package "Extended resolution"
selectable values between 10'000 ms and 64 ms, step of 1 ms

With "Extended resolution" installed
selectable values between 100'000 ms and 64 ms, step of 1 ms

Reception

Number of gates

Without package "Extended number of gates"
variable between 100 and 10, not user's selectable

With "Extended number of gates" installed
variable between 1000 and 4, step of 1 gate
Position of the first gate

Without package "Extended number of gates"
fixed. Echo sampled after the end of the emitted burst

With "Extended number of gates" installed
movable by step of 1 mm but not earlier than the end of the emitted burst
Amplification (TGC)

amplification range from -40 to 40 dB

Without package "variable TGC"
Uniform or automatic computation

With "variable TGC" installed"
Uniform
slope mode
exponential amplification between two defined depth values. Custom mode User's defined values between -40dB and +40dB in cells; variable number (from 1 to 1024), size and position of the cells.
Automatic computation
Sensitivity >-100 dBm

Sampling volume

lateral size defined by the acoustical characteristics of the transducer.
longitudinal size

without package "Extended resolution"
defined by the burst length but not smaller than 1.1 mm. Not user's selectable

with "Extended resolution" installed
defined by the burst length or a user's selectable internal filter. available values: 3.9, 2.9, 1.3, 1.1, 0.8, 0.7 mm
(c=1500 m/s ,defined at 50% of the received signal)
Display resolution:

without package "Extended resolution" 2 values as mentionned in the table below

time between gates in ms
Frequency (MHz)
0.5
1
2
4
8
10
Corse
20
10
10
5
3
2
Fine
5
3
2
1
1
0.5

with "Extended resolution" installed distance between the center of each sampling volume selectable between 0.166 and 20 ms, step of 0.166 ms.

 
Velocity resolution 1 LSB, Doppler frequency given in a signed byte format. Depends on velocity scale and emitting frequency

Ultrasonic Processor

Doppler frequency

computation based on a correlation algorithm
Wall filter stationary echoes removed by IIR high-pass filter 2nd order
Emissions per profile

without package "additional compute mode"
automatically adjusted as a function of desired quality factor

with package "additional compute mode" installed
between 1024 and 8, any values
Detection level 5 levels of the received Doppler energy may disable the computation
Acquisition time per profile minimum: about 2-3 ms
filters on profiles

without package "additional compute mode"
none

with package "additional compute mode" installed
moving average: based on 2 to 32000 profiles zero values included or rejected median, based on 3 to 32 profiles
Velocity scale

without package "additional compute mode"
Bi -directionnal velocity scale (equal range)

with package "additional compute mode" installed
variable positive and negative velocity range
Maximum velocity
Frequency (MHz)
 
0.5
 11.72 m/s
 
1
 5.86 m/s
 
2
 2.93 m/s
 
4
 1.46 m/s
 
8
 0.73 m/s
 
10
 0.59 m/s
Compute and display

without package "additional compute mode"
velocity profile
echo profile
velocity profile with echo profile

with package "additional compute mode" installed
velocity profile
Doppler energy
echo profile
velocity profile with echo profile or Doppler energy
velocity profile with velocity versus time of one selected gate velocity profile with flow rate versus time
(circular section assumed)
velocity profile with real time histogram
echo modulus with real time histogram
Doppler energy with real time histogram
velovity profile with turbulence profile
power spectrum of one selected gated
histogram profile
turbulence profile
Cursor

without package "additional compute mode"
None

with package "additional compute mode" installed
4 available cursors in tracking mode (follow the displayed curve). Statistical values available (Mean, standard deviation, minimum, maximum)
External Trigger

without package "advanced Trigger"
None

wth package "advanced Trigger" installed
by external signal, change in the logic state (TTL/CMOS level) automatic record capability Trigger delay from 0 ms to 32s, step of 1 ms
Velocity component automatic computation of the projected velocity component along the flow axis
Replay mode replays a recorded measure from the disk
saving modes save the past, record the future (manual trigger)

Memory/Files

Internal memory size

without package "advanced Record"
1000 profiles

with package "advanced Record" installed
32'000 profiles
Configuration parameters

without package "advanced Record"
1 saved configuration

with package "advanced Record" installed
9 saved configurations with description
Data file Binary
ASCII
ASCII statistical data

Environment

Power supply 110 - 220 VAC, 50 - 60 Hz
Host PC Operating system Windows® XP
Communication

via USB full speed, Connector type B
US interface US probe In/Out, BNC Echo, (max 0.7 Vp), output impedance of 50 ohm PRF, TTL low level pulse of 100 ns at each emission
External trigger input

TTL level, pull up 330 ohm
Temperature 5 - 35 °C
Size (WxHxD) 235x98x347 mm
Weight 3 Kg

 

All values computed with a sound velocity of 1500 m/s (water),in the direction of the ultrasonic beam

 

Download DOP3000 specifications in pdf format