Difference between revisions of "SonixDAQ Hardware"

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== SonixDAQ I/O Connections ==
 
== SonixDAQ I/O Connections ==
 
The SonixDAQ has the following connections:
 
The SonixDAQ has the following connections:
 
+
* The probe connector
* The SonixDAQ input connections are as follows:
+
* The power supply connector
** The probe connector
+
* BNC connectors:
** The power supply connector
+
** External Trigger
** BNC connectors:
+
** External Clock
*** External Trigger
+
* The USB 2.0 connector
*** External Clock
 
* The SonixDAQ input/output connections are as follows:
 
** The USB 2.0 connector
 
* The SonixDAQ does not have any pure output connections.
 
  
 
The next section contains the figures for these connections and description of how they should be wired.
 
The next section contains the figures for these connections and description of how they should be wired.

Revision as of 17:39, 4 February 2014

Contents of the Box

The SonixDAQ box contains:

  • The SonixDAQ
  • One USB cable,
  • Two BNC cables, and
  • A power adapter.
SonixDAQ 1.1



SonixDAQ I/O Connections

The SonixDAQ has the following connections:

  • The probe connector
  • The power supply connector
  • BNC connectors:
    • External Trigger
    • External Clock
  • The USB 2.0 connector

The next section contains the figures for these connections and description of how they should be wired.

Connecting the SonixDAQ to the Sonix System

In order to capture the data, the SonixDAQ has to be connected to the Sonix ultrasound system. For this purpose, the SonixDAQ probe connector should be connected to the Sonix system's lowest probe slot. The other probe slot of the Sonix system is reserved for the actual probe that transmits and receives the ultrasound signal in a standard way.


SonixDAQ Probe Connector


SonixDAQ on SonixTouch


Note that for SonixMDP and Sonix RP systems, the two bumpers underneath the probe connectors on the DAQ need to be removed. This is shown in the figure below:

Removing Bumpers


Also on the SonixMDP system the plastic on the bottom needs to be removed. This is shown in the figure below:

SonixDAQ on SonixMDP


Connecting USB Cable

Connecting the USB cable is straight forward. Like other USB devices just connect one side of the USB cable to the DAQ and the other side of the USB cable to on of the USB port on the Sonix system. Note that USB connector is used both for programming the DAQ and transferring the data from DAQ to PC.

Connecting BNC Cable for Sync Signal

The next step is to connect the DAQ BNC Sync cable to the correct Sonix systems's BNC for proper synchronization. In the synchronous data acquisition mode, the DAQ waits for the sync signal before starting to acquire data. Thus, care should be taken to ensure that the DAQ's correct BNC connector (input sync) is connected to the Sonix system's correct BNC connector (output sync). The following figures show the correct connectors for both the DAQ and the Sonix systems.


SonixDAQ BNC Ports, the BNC port on the left is the Sync Signal and the BNC on the right is the clock Signal


Sonix RP BNC Ports


SonixTOUCH BNC Ports


After this step, the SonixDAQ is ready to be powered up. Once powered up, three green LEDs beside the power button should turn on.

Connecting BNC Cable for Clock Signal

The SonixDAQ has its own internal clock for data acquisition which is running at 40MHz. This clock may not be perfectly synchronized with the Sonix systems internal clock. This may introduce one sample shift in-between sequences of channel data. To resolve this issue, the second BNC can be used to provide external clock to the DAQ. In the external clock data acquisition mode, the DAQ will ignore its internal clock and will rely on the clock which is provided to it through the second BNC cable. For this mode to work properly, the Sonix system should be programmed to output its internal clock (@40MHz) to one of the BNC cable. This signal should then be connected to the DAQ through its second port using the other BNC cable.

Note: Regardless of the sampling frequency of the SonixDAQ, this clock always has to 40MHz. SonixDAQ generates the higher sampling frequency from this 40MHz clock.

Note: 40MHz clock on the second BNC cable is only available on the SonixTOUCH and the SonixMDP systems. SonixRP systems are not able to provide the system clock through the BNC cable.

Equipment Ratings

SonixDAQ Power Supply:

  • Input – 90V ~ 264VAC, 47Hz/63Hz, 4.0A @ 120VAC (Max.)
  • Output – 12V @ 0 ~ 21.67A

SonixDAQ:

  • Input – 12Vdc 20A

Hardware Block Diagram

Inside the DAQ there are four receive board each capturing 32 channel (128 channel total). There is also one main board that control the data acquisition process. Inside the DAQ is shown in a figure below:

Inside SonixDAQ


A high-level block diagram of the SonixDAQ is shown below. The orange circles show some of the parameters provided to the user for controlling the data acquisition. The details of these parameters are given in the SonixDAQ software.


SonixDAQ General Block Diagram


A block diagram of the SonixDAQ hardware that provides a detailed description of the signal processing chain and imaging parameters can be found below. The document shows individual components namely transmit/receive switch, LNA, PGA, AA filter, ... and the parameters which are used to adjust their performance.


Signal Chain
Signal Chain
Signal Chain
Signal Chain
Signal Chain
Signal Chain
Signal Chain