Hi,
My issue is related to the drift of DSP C5402 timer.
details:
- I'm using a TCXO as an external source clock X2/CLKIN: link here.
- View the accuracy/stability of my TCXO 0.5ppm, the drift should be within 2ms/hour.
- in some boards, I did not notice the drift. in others the drift is importants (could reach 120ms/hour).
Question:
1- I think one of the possible cause could be the TCXO output level, however, I have some boards with TCXO working well (no drift).
Based on the DSP datasheet, Page 35/72, the high/low level of the X2/CLKIN are defined as: highLevelVoltage=1.35V, LowLevelVoltage=0.6V.
however, my TCXO output is 0.8Vpp, offset of 0.6V.
Question: What do you think about that? is the choised TCXO answers to DSP specs ?
2- Have I missed something ?
Thank you.
