Evaluation Board User Guide

UG-287

Rev. B | Page 9 of 12

Data Capture

Click Data Capture in the menu bar of the main window to

read and store a sequence of output data from the DUT. The

Data Capture window (see Figure 14) provides controls for the

data storage location, data file name, register selection, data

format, and data file header. Each data collection cycle starts

when the DUT’s data-ready signal pulses.

Data Register Selection

The Data Capture window contains a list of sensor data, which

are associated with the output registers, along with a

corresponding selection check box. Use the check box to

include an output register in each data collection cycle of the data

record. The ADIS1613x, ADIS1637x, and ADIS1648x products

currently provide lower word registers, that capture the bit growth

associated with integrated filtering operations. For example,

X_GRYO_LOW is a 16-bit register that captures this bit growth for

the x-axis gyroscope in these products. While this register provides

16 more bits (for a total of 32-bits), the ADIS1648x products rarely

need more than 24 bits to preserve the precision available in the

ADIS1648x products, so many of the least significant bits in these

registers are not significant.

Selecting the 16-bit option in the Data Capture menu includes

only the upper 16 bits of output data (for example, only

X_GRYO_OUT). Selecting the 32-bit option includes all 32 bits

in the data record (for example, X_GYRO_OUT and

X_GYRO_LOW). Selecting both 16-bit and 32-options result in

separate entries: one for the X_GYRO_OUT and another that

combines X_GYRO_OUT and X_GYRO_LOW data. For

maximum speed, select one or the other, but not both.

Data Record Options

Selecting the Add File Header check box controls the first line

of the data record file. Clearing this check box removes the header

line from the data record. Selecting the Use Scaled Data check

box causes the software to convert the digital output codes into

a decimal equivalent prior to storing them in the data record file.

place. For finer resolution, uncheck the Use Scale Data option

and convert the twos complement result using post-event signal

processing routines.

Sample Rate

The sample rate is dependent on the data-ready signal coming

from the IMU and is typically associated with a register setting,

such as DEC_RATE in the ADIS16488.