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Testing for Designed Board. 1.1 Customer Concept. sampling frequency : 138.24MHz / Interpolation : 4x Enable Digital Mixer fs /2 Disable NCO. FPGA 138.24MSPS DATA. ADC. DAC3484. 241.92MHz. 241.92MHz. 1.2 Test Result. [DAC3484 Register]. 1.3 Question. -- Why signal is break ?

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Presentation Transcript
slide1

Testing for

Designed Board

slide2

1.1 Customer Concept

  • sampling frequency : 138.24MHz / Interpolation : 4x
  • EnableDigital Mixer fs/2
  • Disable NCO

FPGA

138.24MSPS

DATA

ADC

DAC3484

241.92MHz

241.92MHz

slide3

1.2 Test Result

[DAC3484 Register]

1.3 Question

-- Why signal is break ?

-- Center Freq is not 241.92MHz. Why?

slide4

Testing for

TSW1400 + DAC3484 EVM

slide5

1. Test Configuration

Signal Generator

Spectrum

TSW1400

DAC34H84EVM

PC

slide6

3. Test Result

- Signal source file: single tone

- F sampling frequency : 307.2MHz / Interpolation : 4x

[TSW1400]

[DAC3484]

[DAC34H84 Register]

[Spectrum]

Test Result : Normal

slide7

3. Test Result

- Signal source file: WCDMA_TM1_complexIF30MHz_Fdata307.2MHz_1000

- F sampling frequency : 307.2MHz / Interpolation : 4x

[TSW1400]

[DAC3484]

[DAC34H84 Register]

[Spectrum]

Test Result : Normal

slide8

3. Test Result

- Signal source file: WCDMA_TM1_complexIF30MHz_Fdata307.2MHz_1000

- F sampling frequency : 307.2MHz / Interpolation : 2x

[TSW1400]

[DAC3484]

[DAC34H84 Register]

[Spectrum]

Test Result : Normal

slide9

3. Test Result

- Signal source file: single tone

- F sampling frequency : 138.24MHz / Interpolation : 4x

[TSW1400]

[DAC3484] PLL unlock

[DAC34H84 Register]

[Spectrum]

Test Result : Abnormal

Signal unstable

Center Freq mismatch

slide10

3. Test Result

- Signal source file: single tone

- F sampling frequency : 138.24MHz / Interpolation : 2x

[TSW1400]

[DAC3484] PLL unlock

[DAC34H84 Register]

[Spectrum]

Test Result : Abnormal

Signal unstable

Center Freq mismatch