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281, 282, 284
Users Manual
8-4
DTMF Testing with a Multi-Channel Generator
An important use of tone mode is DTMF (Dual Tone Multiple Frequency) testing in
which two channels are set up with equal length lists of different frequencies, triggered
from a common signal. The outputs are summed together using the internal sum facility
(see chapter 12, Sum). DTMF testing generally uses sine waves in the frequency range
600 Hz to 1.6 kHz.
It is also possible to set up DTMF testing using two single channel instruments triggered
by
a common external signal and summed using the external SUM capability.
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