PCIe Compliance Testing Reference
PRELIMINARY INFORMATION
Jetson AGX Orin Series Tuning and Compliance Guide DA-11040-001_v0.7 | 19
Vmax and Vmin
Bring CH1, CH2 to cross each other on the screen
Set No Persistence in Display Menu
Go to Measurements --> Measurement Setup -->Select CH1--> Amplitude --> Max, Min.
Repeat for CH2
Vcross Max, Min, Delta using Manual Approach
Bring CH1, CH2 to cross each other on the screen
Increase the vertical and the horizontal scale to the maximum
Set it to Infinite Persistence in Display Menu
Use two horizontal bars to measure the crossing
Note down in Vcross Max, Vcross Min and Vcross delta (difference between these two
values)
Save as XXX_S1.png file where XXX = PE0, PE1, PE2, depending on the slot that is being
characterized
Vcross Max, Min, Delta with Jitter Application Software
Use DPOJET or JIT3 (Jitter Advanced) software or equivalent.
Set Source 1 to REFCLK+ and set for rising and set Source 2 to REFCLK- and set for falling.
Record max, min, and delta over 80,000+ measurements.
See specification for: Vmin <Vcross<Vmax, Delta
Setup voltage max and min measurements and measure 1000+ measurement samples on
each single end.
Differential REFCLK AC Measurements
All other REFCLK AC measurement shall be executed with differential setup (high impedance
probes). Use probes with soldering pads to connect scope differential probe to REFCLK+ and
REFCLK-. When using breakout boards connect SMA cables from breakout board to probes.
Edge Rate Max and Min, Falling and Rising
Measured from -150 mV to +150 mV, centered at differential 0. Set scale to see a single
rising and falling edge depending on the measurement.
Use the rise time measurement for rising edge and fall time measurement for falling edge.
Set reference levels for the measurement to -150 mV and +150 mV for the range.
Take more than 1,000 measurements. 0.3/time = V/ns. Use the min and max times for max
and min edge rates respectively. See specification for edge rate.
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