Datasheet
7–68
Glossary
Incident-wave switching Voltage transition that is strong enough to switch the input of the receiver on the first edge of
the wave. This implies that subsequent reflections do not change the state of the receiver to its
previous state.
Noise margin Difference between the driver or receiver threshold voltage and the voltage on the bus. A noise
margin comparison for the GTL/GTL+ technologies is shown in Table 1. The increased noise
margin for GTL+ is preferred because it can result in better signal integrity.
Stub Path on the board between the driver/receiver card and the backplane. This includes the trace
on the board, the connectors, and the lumped capacitance of the driver or the receiver. The length
from the driver/receiver to the backplane is the stub length.
Throughput Data rate that is achieved on the bus or the backplane. It can be calculated on a parallel-bus
architecture as the product of the number of bits and the frequency of transmission.