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signal and displays only the normal waveform of the
cable under test. When the NOISE FILTER automatically
engages, the message center will alternately display
POWERED CABLE and AUTO FILTER.
If noise or power is present at levels not sufficient to
automatically engage the noise filter, the filter can be
switched on manually.
If any key is touched while the noise filter is in use, the
filter is disengaged while that key function is performed.
The filter reengages after five display cycles. This allows
multiple keypad selections without waiting for the filter
to engage or disengage.
NOTE: It takes longer to generate a waveform
with the noise filter engaged. Therefore, the
waveform repetition rate is reduced.
NOTE: The filter will not protect the instrument
from damage caused by high voltage.
Multifunction Waveform Filtering (Optional)
This option provides a unique multilevel filtering system
for filtering various types of interference. Each touch of
the FILTER key engages a different type or level of filter.
Try each of the filters to determine which filter works
the best for each test.
TDRs are used in a variety of industries and applications.
With the various types of test surroundings, also
comes various types of signals which can affect the
performance of a TDR.
Signals such as power (50 to 400 Hz), audio (100 Hz
to 20,000 Hz), data (50 kHz to 10 MHz), and RF (500
kHz to 1 GHz) can all affect a TDR differently. Therefore,
a TDR with only one type of filtering system may work
well in one application but not in another.
Riser-Bond Instruments has addressed this problem
by engineering a unique multifunction/multilevel noise
filtering system into the Model 1205CXA which can
greatly improve test results under these types of con-
ditions.
By selecting FILTER from the menu and using either
icon key, you can manually step through various levels
and types of noise filters. Each touch of the ICON key
starts a new type and level of filtering, each of which will
be displayed in the message center. Every filter should
be tried in order to determine the best result.