Giga-tronics 8650A Series, Operation Manual

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Series 8650A Universal Power Meters
2-36 Manual 31470, Rev. E, April 2001
2.3.15 Burst Start Exclude, Burst End Exclude
When measuring burst signals, it is sometimes desirable to mask the beginning or the end of a burst so
that overshoot and other distortions do not affect the reading.
The Burst Start Exclude and Burst End Exclude features make it possible for BAP mode measurements
to exclude the beginning or the end of a burst in this way. Both features can be used simultaneously, but
this requires caution: if the excluded periods overlap, there is nothing left of the burst to be measured. If
the entire burst is excluded,
NoSync
will flash on the screen to the right of the sensor power units, and
the meter will revert to average measurement in the style of the MAP mode.
The start exclude time is selected from a series of discrete values (0.000 ms, 0.030 ms, 0.059 ms,
0.089 ms, and so on up to 45.548 ms). The end exclude time has the same discrete values available
except the maximum time value is limited to 31.949 ms.
Figure 2-20: Burst Start Exclude & Burst End Exclude
P
ower
Time
Burst Start Exclude
Burst End Exclude
Burst Width
Include Exclude
Exclude
Include
Burst Width
P
ower
Time