System options, System options -77 – Altera JNEye User Manual

Page 83

Within the Aggressor Transmitter tab, there are eight aggressor types associated with the aggressor types

in the Channel Wizard’s Signal Source menu. Each aggressor can be configured as follows:
• Data Rate—Data rate of the selected aggressor transmitter in Gbps.

• Test Pattern—Aggressor transmitter’s test pattern. JNEye supports the following test patterns:

• Same as victim TX

• PRBS-7, PRBS-9, PRBS-11, PRBS-15, PRBS-23, PRBS-31

• VOD—Differential output voltage of the aggressor transmitter in volts.

• Transmitter Type—Aggressor transmitter can be one of the following transmitter types:

• Same as victim TX

• Stratix V GX

• Arria V GZ

• Stratix V GT

• Custom

• Pre-emphasis / FIR—Pre-emphasis or FIR setting of the aggressor transmitter. You can set it to be the

same as the victim TX or you can type in the setting.
Note: • In manual pre-emphasis/FIR input mode, the pre-emphasis/FIR setting must be in the same

format as used in the Transmitter tab. This does not mean that the aggressor transmitter

must be the same type as the victim transmitter, but that the pre-emphasis setting format

must be in the format as if it is a victim transmitter. For example, if the aggressor transmitter

type is Altera Stratix V GX, the pre-emphasis/FIR setting will be in a list of TX-FIR levels

such as -1, 0, 20, 3, where -1 is the pre-tap 1 value, 20 is the post-tap 1 value, and 3 is the

post-tap 2 value. The main tap can be any value, because JNEye determines the main tap's

value based on the values of other FIR taps.

• If the user input TX pre-emphasis /FIR is invalid for the selected transmitter type, pre-

emphasis/FIR will be disabled.

If the transmitter type is Custom, the following parameters are also used:
• Edge Rate—JNEye generates a transmitter output waveform with the specified edge rate. Edge rate is

in the format of ps/Volt.

• TX-FIR Length—Length of TX-FIR for custom aggressor transmitter.

• Main-Tap Location—Location of main tap of aggressor transmitter.
The example shown in

Figure 2-60

indicates an aggressor transmitter, which is a custom transmitter type,

running at 6.5 Gbps with the PRBS-23 test pattern and a VOD of 1.2 V. The TX FIR coefficients are [-0.1,

0.65, -0.25] with a TX-FIR length of 3 and the main tap is at 2nd tap. According to the link configuration

shown in

Figure 2-58

, this aggressor transmitter is associated with Crosstalk (FEXT) channel ID = 3.

System Options

Use the System Option windows to set the simulation setting.