Please suggest on TX_LPF issue

[ganeshpatel ece]

Hi sir,

 i am using LMS 6002d in my project.

1.LMS 6002d is configured by using SPARTEN-6 FPGA.

2.No issue was found reading and  writing to the SPI.

3.Auto calibration steps are performing at initial start up of LMS.( Steps are Copied from FAQ v1.0r12 (by lime))

4.Not Applying any input at the time of auto calibration(initial start up).

5.After writing the NINT and NFRAC - PLL successfully locked. 

6.Gain of VGA2 also observed at spectrum analyzer by increasing and decreasing the dB value of register.

7. The output wave form observed at spectrum analyzer and it was found at wanted LO frequency.

8. But after applying the 

        a) Base band NRZ signal as input at 5Mhz,       b) 2.5Mhz IQ selection clock     c) 5Mhz Clock as TX Clock 

 the spectrum is not changing , its still only the carrier.

we are debugging in so many ways but input we are not able to applying. 

no modification was done DAC enabling side, because in default position it was in "enabled". 

i have seen your answers in lime micro open forum.please suggest something to get succeeded.

Thanks & Regards 

Kasarla Ganesh