MCXO LNB modification

Hello OMs,

has someone already tried a LNB mod with a MCXO like this one?

https://www.vectron.com/products/ocxo/mx-503.htm

Looks interesting, stable like a OCXO but current consumption likeTCXO.

vy73 DE DB8TF

Hi Dave,

what is your impression with this MCXO stabilisation?

Does it work so good like it sounds according to the datasheets?

I can't find any posts from you about that here in this forum.

Vy73 DB8TF

Dave could it be that the "Si Time 0.1ppm" are normal TCXOs?

https://www.mouser.de/datashee…7-datasheet_1-1371858.pdf

I see 0,1 / 0,25ppm on their datasheets.

The MCXOs are described with 0,02 / 0,03ppm stability.

Vy73 DB8TF

OK Dave,

but those SiTime MEMS TCXOs are not the same as the MCXOs i mean

even if the name M-CXO could be understood as MEMS TCXO.

You can see on the datasheet that the stability is much better.

So i guess till now nobody has tried a mod with a "real" MCXO.

VY73 DB8TF

see here: https://de.farnell.com/search?st=MCXO

About 50€ but unfortunately a suitable frequency (25/27) MHz is not in the list.

But the technical data looks very impressive.

VY73 DB8TF

Look at the first datasheet i posted.

±30ppB

So nobody has used a MCXO till now..