User guide

Transmitter Pre-Emphasis Settings
The programable pre-emphasis block in the transmit buffer amplifies the high frequencies in the transmit
data to compensate for attenuation in the transmission media.
XCVR_A10_TX_PRE_EMP_SIGN_PRE_TAP_1T
Pin planner or Assignment Editor Name
Transmitter Pre-Emphasis First Pre-Tap Polarity
Description
Controls the polarity of the first pre-tap for pre-emphasis. The default value is FIR_PRE_1T_NEG.
Table 8-17: Available Options
Value Description
FIR_PRE_1T_POS Positive pre-tap 1
FIR_PRE_1T_NEG Negative pre-tap 1
Assign To
TX serial data.
Syntax
set_instance_assignment -name XCVR_A10_TX_PRE_EMP_SIGN_PRE_TAP_1T <value> -to
<tx_serial_data pin name>
XCVR_A10_TX_PRE_EMP_SIGN_PRE_TAP_2T
Pin Planner or Assignment Editor Name
Transmitter Pre-Emphasis Second Pre-Tap Polarity
Description
Controls the polarity of the second pre-tap for pre-emphasis. The default value is FIR_PRE_2T_NEG.
Table 8-18: Available Options
Value Description
FIR_PRE_2T_POS Positive pre-tap 2
FIR_PRE_2T_NEG Negative pre-tap 2
UG-01143
2015.05.11
Transmitter Pre-Emphasis Settings
8-15
Analog Parameter Settings
Altera Corporation
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