tony_lth
Advanced Member level 5
Hi, Gurus,
There is an issue confused me for a while.
Now the XO of the 470MHz LORA design is a 32MHz TCXO with about 1ppm error, so the RF freq error is also about 1ppm.
But I want to replace the 32MHz TCXO with a normal 32MHz crystal, which has about 20ppm freq error.
The issue is that the 470MHz LORA may be a node for the LORA netwrok, i.e., as a similiar base station to receive several hundreds sensors data in TX/RX mode.
So the node 470M LORA should have a sync function, and I think the sync function should be based on the baseband processing and doubt if it is related to RF freq error.
I don't know the protocols of LORA networks, so any Guru think it is possible to replace the 32MHz TCXO with a normal XO?
Attachments are the 32MHz TCXO datasheet and related LORA documents, for the reference.
Best,
Tony Liu
PS: The 32MHz TCXO is working for Smetech LORA 1268 RF IC.
There is another 8MHZ XO(20ppm) for the STM32 IC as the baseband crystal.
There is an issue confused me for a while.
Now the XO of the 470MHz LORA design is a 32MHz TCXO with about 1ppm error, so the RF freq error is also about 1ppm.
But I want to replace the 32MHz TCXO with a normal 32MHz crystal, which has about 20ppm freq error.
The issue is that the 470MHz LORA may be a node for the LORA netwrok, i.e., as a similiar base station to receive several hundreds sensors data in TX/RX mode.
So the node 470M LORA should have a sync function, and I think the sync function should be based on the baseband processing and doubt if it is related to RF freq error.
I don't know the protocols of LORA networks, so any Guru think it is possible to replace the 32MHz TCXO with a normal XO?
Attachments are the 32MHz TCXO datasheet and related LORA documents, for the reference.
Best,
Tony Liu
--- Updated ---
PS: The 32MHz TCXO is working for Smetech LORA 1268 RF IC.
There is another 8MHZ XO(20ppm) for the STM32 IC as the baseband crystal.