Olympus EPOCH 1000 Series, Руководство пользователя

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910-269-EN, Rev. B, June 2011
98 Chapter 4
• 1.5 MHz to 8.5 MHz
• 5.0 MHz to 15.0 MHz
• 8.0 MHz to 26.5 MHz (high-pass)
4.5.2.2 Advanced Filter Set
The EPOCH 1000 Series Advanced filter set takes advantage of the instrument’s
unique digital receiver design and allows unprecedented filtering flexibility. There are
several distinct performance advantages that result from this filter set. Specific
performance improvements include:
• Performance improvement with low frequency probes that are commonly used
for inspection of composites and plastics. Greater sensitivity and reduced
distortion are easily observed.
• Improved initial pulse (main bang) recovery with new DC coupled setups
compared to the standard lower frequency band-pass filter settings (0.2 MHz to
10 MHz, 1.5 MHz to 8.5 MHz, etc.).
• Optimized broadband response from medium-to-high frequency transducers.
• Use of very low frequency transducers (50 kHz to 100 kHz range) for specialized
applications.
The Advanced filter set contains the following 30 filters. These filters are not tested to
the EN12668-1 code requirements.
• A DC - 1.2 MHz
• A DC - 4.0 MHz
• A DC - 8.5 MHz
• A DC - 10.0 MHz
• A DC - 15.0 MHz
• A DC - 26.5 MHz
• A BYPASS - This setting turns off all digital filtering.
• A BYP_EXT - Same as above. Used at extended ranges.
• A 0.2 - 4.0 MHz
• A 0.2 - 8.5 MHz
• A 0.2 - 15.0 MHz
• A 0.2 - 26.5 MHz
• A 0.2 MHz - BYP
• A 0.5 - 8.5 MHz
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