Agilent Technologies J-BERT N4903B Instrukcja Użytkownika Pobierz pdf (Strona 8)

TX Measurement Challenges for PCIe 3.0

4.3.3.1.2. Measurement Setup for 8.0 GT/s Transmitters

 The PCIe electrical specification references all measurements to the

is not

generally accessible, and the closest accessible point is usually a

pair of microwave-type coaxial connectors separated from the DUT

pins by several inches of PCB trace, called the breakout channel.

DUT

Low jitter

clock source

TP1TP1

DUT

Breakout

Channel

Low jitter

clock source

TP3

TP2

Replica

Channel

Length 3 – 6”

External Generator. Can be a

pulse Generator (Agilent 81134A,

81150A) or sinusoidal source

(Agilent E8663D PSG or N5181A

MXG)

Specification Reference Point

is at the pin

Measurement point is

at TP1

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 67 68

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Agilent Technologies J-BERT N4903B Instrukcja Użytkownika Strona 8