Datasheet

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Figure 9: WaveVision 5 main window command buttons

• Sampling Rate - When the signal source panel is selected, the clock frequency is

displayed. This is initially the internal clock. In this example, 1800 MHz is generated by

the LMX2531 on the reference board. The sampling rate is determined by the FPGA

when the board is powered up. The calculation is accurate to better than 1%. If an

external source is in use, confirm that this number corresponds to the clock reference

that is applied. If it is not correct, subsequent data captures and display will not be

correct.

• Resolution – This will always be set to the ADC12D1X00RF resolution which is 12 bits.

• Acquisition Size - This setting displays and selects the number of samples captured in

each acquisition. 4K samples is the default, with settings up to 32K samples. A larger

sample size increases the equivalent FFT bandwidth resolution, but at the expense of

more memory and slower acquisition time.

• Data Format - The default data format is offset binary for the ADC12D1X00RF.

• FFT buffers to average - The last option is the FFT averaging function. Using this

feature, subsequent samples can be averaged to obtain improved signal to noise.

However, this is at the expense of time.