Description
The bit position of the tx_out generated from the Cyclone® III device altlvds transmitter with regards to the rising edge of tx_outclock is deterministic. Perform timing simulation to determine the bit position of tx_out with regard to the rising edge of tx_outclock.
Functional simulation will not yield accurate results of the tx_out bit position with respect to the tx_outclock, you need to rely on timing simulation to have actual device behavior and bit position.