Carrier 38TXA Guide Guia do Utilizador descarregar pdf (Página 126)

126 Chapter 3

S:\agilent\83217\OPT001\BOOK\CHAPTERS\passfail.fm

Pass/Fail Limit (Specification) Descriptions

18. TXA DTMF Frequency Error (%)

This sets the pass/fail limits for the amount of frequency error allowed

for the DTMF (Dual-Tone Multi-Frequency) signals. Upper and lower

limits must be entered in %.

Pass/fail limits are determined by using any applicable standard such

as:

• EIA/TIA Standard: Dual Tone Multifrequency (DTMF) Signaling,

Transmitted Pulse Characteristics

Example

If you desire that the seven tone frequencies in the high and low group

DTMF signals should be within

±1.5% of their nominal values, enter

−1.5 as the Lower Limit and 1.5 as the Upper Limit.

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Carrier 38TXA Guide Guia do Utilizador Página 126