How do I change the transmitter slew rate of a transceiver in Stratix IV GX devices?

Description

You can change the transmitter slew rate of a transceiver in Stratix® IV GX devices by adding a QSF assignment to the PMA instance using the example below.

set_instance_assignment -name TXPMA_SLEW_RATE MEDIUM -to "gxb:gigabit_tx|gxb_alt4gxb:gxb_alt4gxb_component|transmit_pma0"

The possible settings for slew rate are OFF, LOW, MEDIUM and HIGH.