Teledyne LeCroy Summit Z3-16 PCI Express Multi-lane Exerciser User Manual - Manual (Page 53)

Summit Z3‐16 PCI Express Multi‐Lane Exerciser User Manual 53
Generation Options Dialogs Overview Teledyne LeCroy
TABLE 4.3: Integrity Generation Option Parameters
Parameter Values Default Comment
ACK/NAK Policy
Disable automatic
ACK/NAK DLLP
generation
Always ACK received
TLP packets
Always NAK received
TLP packets
Automatic ACK/NAK
DLLP generation for
received TLP packets
(default)
Auto
Ack
Nak
Disable Auto Auto ‐ The Summit Z3‐16 will send Ack or
NAK according to the PCIe specification
Ack‐ The Summit Z3‐16 will Ack all incoming
TLP packets. Using this option will improve
ACK latency of the Summit Z3‐16, but does
not guarantee reliable data transmission.
NAK ‐ The Summit Z3‐16 will NAK all
incoming TLP.
Disable. The Summit Z3‐16 will not send any
Ack or NAK packets automatically. Ack and
NAK packets can still be generated using a
script.
TLP Policy
Automatically
generate TLP
sequence numbers Yes
No Yes If not set, overrides automatic generation of
the TLP sequence number and uses user‐
defined value of the field in the Packet=TLP
commands.
This option overrides any sequence
numbers specified in the script.
Automatically
generate TLP LCRC Yes
No Yes If not set, overrides automatic generation of
LCRC and uses user‐defined value of the
field in the Packet=TLP commands.
This option overrides any LCRC specified in
the script.
Automatically
retransmit TLPs that
were NAKed or on
replay timer
expiration In symbols
Off 3150 Timeout in TLP transmitter path that counts
time since last Ack or Nak DLLP is received.
If set, automatically retransmit TLPs that
were NAKed or on replay timer expiration.
User defined Replay
Timer In symbols
Off 3150 If set, enable the user to define the Replay
Timer.