SonixDAQ Software V6.X

SonixDAQ software has new interface with the new SDK 6.x.

Main Window
The SonixDAQ software is separated from the Exam software. This section will only focus on the DAQ software which is used to:
 * Initialize the DAQ.
 * Adjust the DAQ parameters from Side Menu.
 * Selecting the buffer size.
 * Adjusting the gain and TGC curve.

The following figure shows the main user interface of the SonixDAQ software:



Note: If you program the DAQ with one bitstream e.g. 40MHz and want to switch to the other bitstream i.e. 80MHz you need to turn off the DAQ and turn it back on. If you skip this step, the DAQ will always respond as already being initialized and will not load the new bitstream.

Sequence Control
After pressing the "initialized" button, the DAQ software will program the DAQ hardware. Once the DAQ is programmed, the right side menu allows the user to adjust the parameters for data acquisition, start/stop the sequencing, and download/transfer the captured data to PC.



Note: If you program the DAQ with one bitstream e.g. 40MHz and want to switch to the other bitstream i.e. 80MHz you need to stop the DAQ and re-initialized it with the new sample rate. If you skip this step, the DAQ will always respond as already being initialized and will not load the new bitstream.



The flowchart of the supported sequence control is depicted in a figure below and will be explained in detail in the following sections.



Adjust the TGC Curve
The user can obtain the desired TGC curve in the top section of the window. Both adjustable TGC (as a function of depth) and fixed TGC can be programmed.



Imaging Parameters
This window allows the user to adjust the imaging parameters such as The effects of these parameters on data acquisition are depicted in a figure below. Further explanations are provided in the next subsections.
 * Number of Samples: number of samples that will be acquired regardless of the sampling frequency,
 * Receive Delay: the delay (in micro seconds) after the sync signal and before start of data collection,
 * Line Duration: duration of each acquisition in micro seconds,
 * Gain Delay, delay after the transmit before the TGC is applied in micro seconds,
 * Gain Offset, shifts the TGC curve up based on the Gain offset value, the value is in micro volts and it ranges from 0 to 1600 (1.6 Volt maximum gain),



Clock Configuration
The DAQ has its own internal clock that runs at 40MHz. This clock is different from the Sonix clock. In this section you set the DAQ to use its own internal clock or to use the external clock provided to the DAQ through a BNC cable. This will make sure that both the DAQ and the Sonix system are using the same clock. It is important to note that this clock always has to be 40MHz regardless of the sampling frequency. The DAQ uses this 40MHz clock to generate the sampling frequency (i.e. 40MHz or 80MHz).

For general imaging it is not necessary to use the external clock. Small differences between the two clocks will not introduce any problem. But for tracking applications (e.g. tissue tracking or blood flow imaging) you should always use the external clock to make sure your data are all synced. Otherwise, you will notice small drifts over time in your channel data samples.

Note: This option is only available on the Sonix systems with the new PCI card (i.e. SonixTouch, SonixMDP, and modified SonixRP). On the old SonixRP system only the internal clock should be used.

Start Configuration
In this section you select synchronization pulse source: internal or external. The synchronization pulse is a pulse which indicates the beginning of each acquisition. The user can choose the source of this pulse based on the purpose of the data collection. If the purpose is to test the DAQ, it is not required to connect the synchronization BNC to the Sonix system’s BNC. The DAQ is capable of generating this pulse internally.

In this scenario, the source of the synchronization pulse must be selected as internal. Also, it is not required to connect the DAQ to the probe slot. Instead, the DAQ's probe connector can be connected to a signal generator, which generates a wave form with a frequency less than 20MHz and amplitude less than 50mV.

However,

Channel Mapping
There are four separate boards inside the DAQ. Each board acquires data from 32 channel.

Active channels can be any combination of channels from 1 to 128. Next figure shows the active channel selection window.