DOP2000
Model 2125
Technical specifications
| Emitting frequencies | from 0.45 MHz to 10.5 MHz, step of 1 kHz |
| Emitting power | 3 levels |
| Burst length | 2, 4 or 8 cycles |
| PRF | between 64 µs (48 mm) and 100’000 µs, step of 1 µs |
Reception
| Number of gates | between 3 and 1000, step of 1 gate |
| Position of the first gate | movable by step of 250 ns |
| Amplification (TGC) |
Uniform, Slope, Custom |
| Sensitivity | >-100 dBm |
Resolution
| Lateral resolution | defined by the transducer |
| Gate length(Longitudinal resolution) | minimum
value of 0.85 ms (0.64 mm) depends on spatial
filter and burst length. (approximate value, defined at 50% of the received signal) |
| Spatial filter | from 50 kHz (3.9 mm) to 300 kHz (0.7 mm) , step of 50 kHz |
| Display resolution | distance between the center of each sample volume selectable between 0.25 ms (0.187 mm) and 20 ms (15 mm), step of 0.25 ms |
| Velocity resolution | 1 LSB (maximum = 0.0007 mm/s; minimum = 91.5 mm/s), Doppler frequency given in a signed byte format |
Ultrasonic Processor
|
Doppler
frequency
|
computation based on a correlation algorithm |
| Wall filter | stationary echoes removed by IIR high-pass filter 2nd order |
| Number of emissions per profile | between 1024 and 8, any values |
| Detection level | 5-level selectable threshold to discard low SNR values |
| Acquisition time per profile | depends on PRF and number of emissions per profile, minimum around 2 to 3 ms |
| Filters on profiles | moving
average: based on 2 to 32000 profiles, zero values included or rejected median, based on 3 to 32 profiles |
| Maximum velocity | 11.72 m/s for bi-directional flow, 2 times more for unidirectional flow (at 0.5 MHz) |
| Velocity scale | variable positive and negative velocity range. |
Computation
|
Compute
and display
|
velocity profile Doppler energy echo modulus velocity profile with echo modulus 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 power spectrum of one selected gated real time turbulence |
| Statistics | mean, standard deviation, minimum, maximum |
| Velocity component | automatic computation of the projected velocity component |
| Replay mode | replays a recorded measure from the disk |
| Utility | freeze/run mode |
Advanced features
| measurement of the ultrasonic field | |
| acquisition of I and Q signals (8000 values can be recorded) | |
|
acquisition in real time of a complete 2D, 3D velocity field. Option |
emission and reception can be realized on separated connectors |
Trigger
| Input | external signal (TTL) or keyboard action |
| Configuration parameters | high, low level, internal pull-up 4 KW |
| Delay | between 1 and 10’000 ms, step of 1ms |
| Acquisition procedure | selectable number of blocks of profiles automatic record capability |
Memory/Files
| Internal memory | variable size, memorization from 2 to 32000 profiles |
| Configuration parameters | 10 saved configurations |
| Data file | Binary (include: ASCII short info blocks, comments, all parameters, all data profiles) ASCII(statistical information available) |
Environment(may be changed)
| Operating system* | Windows® XP |
| Processor* | VIA Eden 800MHz |
| RAM* | 128 MBytes (up to 512 Mbytes in option) |
| Storage devices* | Hard disk
40 GBytes 1’44 MBytes Floppy CD-ROM Read/Write (40x/12x/48x) |
| Screen | 12.4” TFT Color display (800x600) VGA |
| Communication |
2 serial ports |
| US interface |
Echo, (max 0.7 Vp), output impedance of 50 ohm, BNC TTL high level pulse of 100 ns at each emission, BNC Logic level trigger input, pull up by 330 ohm, BNC US probe In/Out, BNC US emission connector, BNC |
| Power supply | 220-110 VAC, selectable, 50 - 60 Hz |
| Humidity | =< 80% |
| Temperature | 5 - 35 °C |
| Size | 340x265x305 mm |
| Weight | 13 Kg |
Options
|
Multiplexer |
10 probes, internal
or external |
|
* may be adapted
to the market |