380 Keysight M8070A Programming Guide
5 SCPI Command Reference
This algorithm exits when the BER is measured below the measurement
threshold BER, or if the last amplitude measurement point was at the
minimum jitter value in the template.
The jitter tolerance result at each jitter modulation frequency is the highest
jitter amplitude at which the measurement was made below the threshold
BER. However, if the device is intolerant of even the minimum jitter value,
the result is not valid and is not plotted.
DLOGarithmic: The Down Logarithmic search algorithm starts at the
maximum jitter value determined by the template.
If a BER measurement has errors above the measurement threshold, the
jitter amplitude is adjusted lower by the coefficient calculated from the
logarithmic step size. For example, if the coefficient is 10%, then the next
amplitude equals the previous amplitude minus 10% of the previous
amplitude.
This algorithm exits when the BER is measured below the measurement
threshold BER, or if the last amplitude measurement point was at the
minimum jitter value in the template.
The jitter tolerance result at each jitter modulation frequency is the highest
jitter amplitude at which the measurement was made below the threshold
BER. However, if the device is intolerant of even the minimum jitter value,
the result is not valid and is not plotted.
ULINear: The Up Linear search algorithm starts at the minimum jitter value
determined by the template.
If a BER measurement has errors below the measurement threshold, the
jitter amplitude is adjusted higher by the linear step size.
This algorithm exits when BER is measured above the measurement
threshold BER, or if the last amplitude measurement point was at the max
jitter value in the template.
The jitter tolerance result at each jitter modulation frequency is the highest
jitter amplitude at which the measurement was made below the threshold
BER. However, if the device is intolerant of even the minimum jitter value,
the result is not valid and is not plotted.
ULOGarithmic: The Up Logarithmic search algorithm starts at the
minimum jitter value determined by the template.
If a BER measurement has errors below the measurement threshold, the
jitter amplitude is adjusted higher by the coefficient calculated from the
logarithmic step size. For example, if the coefficient is 10%, then the next
amplitude equals the previous amplitude plus 10% of the previous
amplitude.
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