Carrier 38TXA Guide Podręcznik Użytkownika Strona 126

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126 Chapter 3
S:\agilent\83217\OPT001\BOOK\CHAPTERS\passfail.fm
Pass/Fail Limit (Specification) Descriptions
18. TXA DTMF Frequency Error (%)
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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