2-52
IM 701210-05E
Difference between Normal Computed Waveforms (Math1 to Math8) and DSP
Channels (DSP1 to DSP6)
Normal Computed Waveforms (Math1 to Math8)
• Since the computation is performed after acquiring the waveform, the interval of
continuous measurements is long.
• Computation is not possible during roll mode display.
• Since the computed result is stored in the main memory of the main CPU, there is
a limitation on the record length.
• Triggers cannot be activated on the computed result.
• Various computing equations are supported, because a general-purpose CPU is
used.
Main
CPU
AD
Analog
16CH
Module
16CH
Module Bus
FF
Result
of Math
ACQ Memory
Giga Zoom Engine
DSP Channels (DSP1 to DSP6)
• Realtime computation can be performed while waveforms are being acquired.
• Computed results can be monitored even during roll mode display.
• There is no limitation on the record length. The record length can be set to the
same length as normal analog input channels.
Example
The record length of CH1 of the analog input channel is 10 MW and
the record length of the DSP channel is 10 MW.
The selectable DSP channel on DSP channel 2 is DSP channel 1; the selectable
DSP channels on DSP channel 3 are DSP channels 1 and 2.)
• Triggers can be activated on the computed result.
• Computation rate is 100 kS/s.
• Addition, subtraction, multiplication, and division (with or without coefficients),
filtering, differentiation, integration, and knocking filtering can be performed.
• Can be used in all acquisition modes (including the dual capture function).
• Acquisition rate is fast, because there is no processing after waveform acquisition.
ACQ Memory
AD
Analog
16CH
Module
16CH
Giga Zoom Engine
Module Bus
FF
DSP
6CH
DSP-CH 6CH
Trigger
FF
DSP
Trigger
System
2.6 Waveform Computation