Other Parts Discussed in Thread: LMK04826
First, I have replaced VCXO with 120MHz one with Crystek CVHD-950 VCXO from 122.88MHz mount and it worked very well showing ~130fsec at 192MHz output. Now, I have replaced VCXO again with Transko TV53A VCXO, 5x3.2mm sized (small foot print) to check my real application with small footprint but somehow it does not lock at all. I have used the same setup file for TicPro for all 120MHz configuration but one vendor worked but the other not. can you check what is going on? I will ultimately will use Transko's TSMV5 5x3.2mm VCXO but it takes time to be designed and delivered. So, in temporary I tried to use TV53A. I have found TV53A input impedance is very high 1Mohm while CVHD-950 has 51kohm. I wonder if this mattered.
1. OSCin: replaced 122.88MHz VCXO with 120MHz VCXO (Krystek CVHD-950) on EVB. working great.
2. OSCin: replaced Kystek 120MHz VCXO with Transko TV53A (5x.32mm foot print). no locking
3. OSCin: ultimately will use Transko TSMV5 (5x.32mm foot print) later once delivered.
3. CLKin1: Firefly-II OCXO was used for 10MHz for all time.
Please let me know any suggestions to try. I have attached PDF files for datasheets of all mentioned parts above.