Hi!
We are working on the development of a video converter where we have a fiber optic transceiver at the input and our board will convert to the SDI standard using the LMH0397.
I recently received access to download the LMH0397 programming manual and downloaded it.
Following this programming manual I noticed that there are some configurations that need to be done on the chip; we are using SPI communication.
I realized that before sending the configuration parameters it is necessary to access the records page to then send the configuration commands.
In terms of physical connections, we've linked the pins
transceiver data communication ports directly on the LMH0397 data input and output pins as below:
TD+ -> IN+
TD- -> IN-
RD+ -> OUT+
RD- -> OUT-
Thus, we believe that the already converted signals coming from the transceiver would be converted to SDI according to our parameterization.
This parameterization is being done via an ARM from ST, that is, we program the ARM with the necessary settings for the LMH0397 to work correctly and send these settings via SPI communication.
But we are having difficulties to know if the LMH0397 is operating correctly according to the parameterization made, or if the way we are doing the parameterization is in fact correct, for this reason we are sending this message requesting your help.
I noticed that in the LMH0397 programming guide there are tables that guide how the parameterization should be according to the desired configuration of the chip, I have been following these tables but I still haven't got a result, which leads me to think that I must be making some mistake that I still haven't been able to meet...
If you want to see some of the code I wrote, let me know and I'll forward it.
If you need any more information from me, please contact me, and I look forward to hearing from you. Thank you for your attention.
Obs: This case refers to the TX transceiver, we are also developing for the RX transceiver but I believe that the methodology should be the same since we are using the same Texas chip.
