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ADC12D1800RF: WaveVision 5 does not capture output spectrum of ADC12D1800RFRB on external clock mode

Takao_KIHARA
Prodigy 20 points
Part Number: ADC12D1800RF

Hello, 

WaveVision 5 does not capture the output spectrum of ADC12D1800RFRB on the external clock mode.

The software showed that the sampling rate was 0.064 MHz.

I measured the board with an external clock on May 2017, and successfully achieved the spectrum.

I checked that R180 was connected to A on the board and chose "External Clock" on WaveVision 5.

The LEDs on the board were lighted as follows: 

DCLK_LOCKED         OFF
OVER-RANGE_Q-CH        OFF
TRIGGER_ARMED        OFF
ADC_POWER        ON
ADC_CALIBRATION        OFF
OVER-RANGE_I-CH        OFF
FPGA_OPERATIONAL    ON
ECM_ENABLED        ON
RCOUT1/2_ENABLED    OFF

On the other hand, I got the output spectrum with an internal clock. 

I would appreciate it if you could tell me how to capture the output spectrum on the external mode.

Thank you in advance.

Best regards,

  • 0
    TI__Mastermind 44680 points
    Hi
    What is the frequency and output power of the signal generator connected to the external clock input?
    Can you try setting the generator to 1800 MHz and +6dBm output power and check the setup again?
    Best regards,
    Jim B
  • 0
    TI__Guru* 91947 points

    Takao,

    We are looking into this.

    Regards,

    Jim

  • 0 in reply to Jim Brinkhurst1
    Prodigy 20 points

    Hello Jim,

    Thank you for your comments.

    > What is the frequency and output power of the signal generator connected to the external clock input?

    Frequency: 300 MHz, Power: +0 dBm

    I'll measure the ADC by using a logic analyzer (Keysight 16902B+16950B), which can obtain 300-Mb/s data (max., full channel).

    > Can you try setting the generator to 1800 MHz and +6dBm output power and check the setup again?

    WaveVision 5 successfully have captured the output spectrum!

    I din't know the minimum frequency that the software could achieve the spectrum.

    Thank you.

    Best regards,

    Takao Kihara

  • 0 in reply to Takao_KIHARA
    TI__Mastermind 44680 points
    Hello
    That is good news.
    The FPGA firmware is capable of capturing data with a somewhat limited clock frequency range.
    It will probably work from 1800 MHz down to around 500 MHz. Clock frequencies below 500 MHz are not supported with this FPGA firmware.
    Best regards,
    Jim B