Dear Treggers, I wonder if any of you happens to know of a source for recommendations for minimum longitudinal balance values as a function of range. SLIC manufacturers, such as AMD and Harris, sort their chips according to balance, and charge accordingly (chips with poorer balance cost less). Different line ranges call for different balance values. Clearly, for a very short line running several feet within a room, the lowest value can be used. However, when an application calls for a maximum range of, say, 200 meters or 1 kilometer, how should one decide on the appropriate minimum balance figure? As far as I can see, EIA/TIA-464B has nothing to say on this matter, and specifies balance requirements only for interconnections with the PSTN (which are also governed by FCC regulatory balance requirements).
The answer to this question seems to depend on the results of measurements made in a range of locations, and therefore, ought to be available from somewhere. Best regards, David Drori Novarex Enterprises Ltd., POB 2833, Luz Building, 5 Kiryat Hamada Street, Har Hotsvim, Jerusalem 91028, Israel. Tel: +972 2 586 4546 Fax: +972 2 586 5890 Mobile: +972 50 678686 E-mail: [email protected]
