Datasheet

Timing Relationship of Driver Card (D1) Data Pattern (Ch1) and Driver Card (D1) Group 1 GTLP Data Out (Ch2)
7–357
Waveform Measurement and Interpretation
4.2 Timing Relationship of Driver Card (D1) Data Pattern (Ch1) and
Driver Card (D1) Group 1 GTLP Data Out (Ch2)
Figure 4–2 shows the probe hookup and O-Scope output for Case 2. The
LVTTL data goes into the SN74GTLPH1655 driving device A-port input, and
the GTLP data comes out of the B-port output. The driver-card GTLP data
output comes out after the rising edge of the clock, in addition to the CLK-to-B
propagation delay. This is why the signals look 180 degrees out of phase.
Figure 4–2. Case 2: D1 Data Pattern (Ch1) and D1 Group 1 GTLP Data Out (Ch2)
LVTTL
Data
Input
GTLP
Data
Output