M61311SP/M61316SP

REJ03F0199-0201 Rev.2.01 Mar 31, 2008

Page 12 of 26

Measure the time needed for the input pulse to rise from 10% to 90% (Tr1) and for the output pulse to rise from 10% to

90% (Tr2) with an active probe.

Pulse characteristics Tr is calculated by the equations below:

Tr =

∆Tr Relative Pulse Characteristics1 (4 V

Relative characteristics

∆Tr is calculated by the equation below:

∆Tr = Tr (26) − Tr (28),

Tr (28)

− Tr (30),

Tr (30)

− Tr (26)

Measure the time needed for the input pulse to fall from 90% to 10% (Tf1) and for the output pulse to fall from 90% to

10% (Tf2) with an active probe.

Pulse characteristics Tf is calculated by the equations below:

Tf =

∆Tf Relative Pulse Characteristics2 (4 V

Relative characteristics

∆Tf is calculated by the equation below:

∆Tf = Tf (26) − Tf (28),

Tf (28)

− Tf (30),

Tf (30)

− Tf (26)

100%

90%

10%

0%

Tr1 or Tr2

Tf1 or Tf2

VthCP Clamp Pulse Threshold Voltage

pulse when the output pedestal voltage turn decrease with unstable. And increase the SG5 input level gradually from 0

The measured value is called VthCP.

WCP Clamp Pulse Minimum Width

Decrease the SG5 pulse width gradually from 0.5

µs, monitoring the output. Measure the SG5 pulse width when the

output pedestal voltage turn decrease with unstable. And increase the SG5 pulse width gradual from 0

µs. Measure the

SG5 pulse width when the output pedestal voltage turn increase with stable (a point of 2.0 V). The measured value is

called WCP.