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Knowledge Base > Discontinued Products > TI-101 Telephone Interface

How do I adjust the null on the TI-101 Telephone Interface?

Place an outside call to someone. Once on the line, have them put the telephone handset down in a quiet place. Connect pink noise, white noise or simply music to the HOST INPUT. Listen, or meter, the CALLER OUTPUT and adjust the COARSE NULL for a minimum of the noise or music in the caller output. Repeat the adjustment for both the LF (low frequency) and HF (high frequency) nulls.

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