Emerson Daniel 3415

Signal Analyzer - update rate, stack size, filter and emission rateFigure 4-3:
Terminology
• Sequence - a complete cycle of firing all enabled transducers in a single round of
transducer operation.
• Stacking - the process of modifying a sequence so that each individual transducer is
fired "x" times (where x equals the stack size) before the next transducer in the
sequence is fired.
• Stack size - the multiple of times each transducer is fired before the next transducer
within the sequence is fired (When stacking is absent or disabled, the stack size is
actually 1, because each enabled transducer is fired once during the sequence.
When stacking is applied or enabled, it is applied increments of 2, 4, 8, and 16 and
are the only stack size choices, so that each enabled transducer is fired 2, 4, 8, or 16
times before the next transducer in the sequence is fired.)
• Emission rate - the time elapsed before the next transducer in a sequence is fired,
regardless of stack size (minimum emission rate is 2 milliseconds with the Filter ON
or OFF). We recommend the default Filter setting, which is the OFF position.
• Stack emission rate - the time elapsed before a single transducer is re-fired when
stacking is enabled (minimum stack emission rate is 2 milliseconds with the Filter
OFF.)
• Chords inactive or active - the exclusion or inclusion of a chord-forming pair of
transducers in the sequence of transducer operation.
• Update time - the time elapsed, in seconds, between each processing, or
recalculation of data that is collected from sequences of transducer firings
• Batch period, or batch cycle - synonymous with Update time, as defined above.
• Sample - refers to one point on the waveform as in samples per cycle. The data that
is collected from one Sequence of transducer operation (This term is displayed in the
Daniel MeterLink
™
Signal Analyzer screen, and is nearly synonymous with Sequence,
as defined above. That is, Samples/update, as displayed in the Daniel MeterLink
™
Signal Analyzer Wizard, could be interpreted as Sequences/update.) This shows the
average number of new samples collected during an update period.
Measurement
Operations manual 17