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ADIS16228 Evaluation Tutorials

Manual FFT, Multiple Sample Rates/Records, Alarms

January 23, 2014

INTRODUCTION

OBJECTIVE:Demonstrate the Spectral Alarm function and Multi-Sample

Rate/Record functions in the ADIS16228, using the Vibration Evaluation Program.

INITIAL CONDITIONSFactory-default register settings, unless specified otherwise

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EVALUATION TOOLS/PHYSICAL SETUP

SOFTWARE:Vibration Evaluation Program, v1.1.9 and v1.2.0

HARDWARE:

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EVAL-ADIS

ADIS16228/PCBZ

4” ribbon cable1mm, 16-pin

Vibration source

SUMMARY OF STEPS

Launch softwareSet Device = ‘ADIS16228’Select ‘Manual FFT Mode’ (Main Window)Configure registers (Register Access Window)Copy register settings to the ADIS16228’s flash memory

(Register Access Window)Configure & Enable AlarmsTrigger and display four different FFT results (Main Window)Change vertical scale settings to optimize use of the screen

area (Main Window)

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Launch software & Set Device = ADIS16228

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Select mode & Launch Register Access Window

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NOTES:

• Setting Mode Selection to Manual FFT is the equivalent of setting REC_CTRL1[1:0] = 00

Register Settings

For a tutorial on configuring register values, click on “Back” and then click on the “ADIS16228 Register Configuration Tutorial.”

Using these steps, establish the following register settings:REC_CTRL1 = 0x1F01Hanning Window, Enable SR0/1/2/3, Automatic FFT Mode

REC_CTRL2 = 0x00FFSet range on SR0/1/2/3 to 1g

REC_PRD = 0x00044 seconds between each trigger

AVG_CNT = 0x6420 only the last four bits matters for this exercise

ALM_CTRL = 0x0087The “7” enables alarms for all three axes

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Click on “Alarms>Alarm Settings”

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NOTES:

Click on “Read Default Values”

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NOTES:

• The Vibration Evaluation Program has a set of “default” alarm values, for the purpose of demonstration.

• These values are used to simplify this demonstration.

Click on “Write to DUT”

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NOTES:

• After seeing the values update for all of the sample rates and bands, write these values to the ADIS16228CMLZ.

• A yellow box will appear for a few moments, indicating that the communication of this data is ongoing. It will disappear when the communication process is complete.

• Exit this Window

Click on “Alarms>Alarm Status Form”

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NOTES:

• Drag the Alarm Status Window to a convenientplace for viewing, which does not impede clicking on the Start button.

• Click on Start to acquire a spectral record (FFT result).

Click on “Start”

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NOTES:

• Notice that all of the status flags are green.

• This indicates that all alarms are passing.

Right click in waveforms to adjust scale

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NOTES:

Right click in waveforms to adjust scale

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NOTES:

Click on Start

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NOTES:

• Notice that the frequency range has changed, since the ADIS is now cycling through each SRx setting

• This graphic shows SR1, which supports a sample rate of 5120 SPS and a Nyquist range of 2560 Hz, as the red arrow highlights.

Click on Start

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NOTES:

• Notice that the frequency range has changed, since the ADIS is now cycling through each SRx setting

• This graphic shows SR2, which supports a sample rate of 1280 SPS and a Nyquist range of 640 Hz, as the red arrow highlights.

Click on Start

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NOTES:

• Notice that the frequency range has changed, since the ADIS is now cycling through each SRx setting

• This graphic shows SR3, which supports a sample rate of 320 SPS and a Nyquist range of 160 Hz, as the red arrow highlights.

Click on Start

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NOTES:

• Notice that the frequency range has changed, since the ADIS is now cycling through each SRx setting

• This graphic shows SR0, which supports a sample rate of 20480 SPS and a Nyquist range of 10240 Hz, as the red arrow highlights.

Add Vibration, then cycle through each sample rate setting by clicking Start

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NOTES:

• SR0 Setting• Sample rate = 20480 SPS• Only one warning alarm

Add Vibration, then cycle through each sample rate setting by clicking Start

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NOTES:

• SR1 Setting• Sample rate = 5120 SPS• Vibration energy overlaps

with the first alarm band

Add Vibration, then cycle through each sample rate setting by clicking Start

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NOTES:

• SR2 Setting• Sample rate = 1280 SPS • Notice how the primary

vibration has moved into the first alarm band

Add Vibration, then cycle through each sample rate setting by clicking Start

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NOTES:

• SR3 Setting• Sample rate = 320 SPS• The vibration energy is

now in the second alarm band

Thank you!

We sincerely hope that this was helpful. Click on “Back” in your web browser to return to the Wiki

Guide. Good luck in your project!

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