Method of providing crosstalk compensation in a jack
The present disclosure relates to a telecommunications jack including a housing having a port for receiving a plug. The jack also includes a plurality of contact springs adapted to make electrical contact with the plug when the plug is inserted into the port of the housing, and a plurality of wire termination contacts for terminating wires to the jack. The jack further includes a circuit board that electrically connects the contact springs to the wire termination contacts. The circuit board includes a multi-zone crosstalk compensation arrangement for reducing crosstalk at the jack.
1. A method for providing crosstalk compensation in a jack, the crosstalk compensation being adapted to compensate for undesired crosstalk generated at a capacitive coupling located at a plug inserted within the jack, the method comprising:
providing a first capacitive coupling positioned a first time delay away from the capacitive coupling of the plug, the first capacitive coupling having a greater magnitude and an opposite polarity as compared to the capacitive coupling of the plug;
providing a second capacitive coupling positioned a second time delay away from the first capacitive coupling, the second capacitive coupling having generally the same magnitude but an opposite polarity as compared to the first capacitive coupling;
providing a third capacitive coupling positioned a third time delay away from the second capacitive coupling, the third capacitive coupling having the same polarity and generally the same magnitude as the capacitive coupling of the plug;
positioning the first, second and third capacitive couplings such that the first and second time delays are generally equal and the second time delay is different from the first and third time delays.
2. The method of claim 1 , wherein if the magnitude of the first capacitive coupling is less than three times the magnitude of the capacitive coupling of the plug, then the second capacitive coupling is positioned such that the second time delay is greater than the time delays of the first and third capacitive couplings.
3. The method of claim 1 , wherein if the magnitude of the first capacitive coupling is generally equal to three times the magnitude of the capacitive coupling of the plug, then the second capacitive coupling is positioned such that the second time delay is less than the time delays of the first and third capacitive couplings.
4. The method of claim 1 , wherein the second capacitive coupling is positioned such that the second time delay is less than the first and third time delays.
5. The method of claim 1 , wherein the second capacitive coupling is positioned such that the second time delay is greater than the first and third time delays.
6. A method for determining the positions of first, second and third zones of crosstalk compensation in a jack, the first, second and third zones of crosstalk compensation being adapted to compensate for undesired crosstalk caused by an undesired capacitive coupling located at a plug inserted within the jack, the first zone of crosstalk compensation including a first capacitive coupling positioned a first time delay away from the undesired capacitive coupling of the plug, the first capacitive coupling having a greater magnitude and an opposite polarity as compared to the undesired capacitive coupling of the plug, the second zone of crosstalk compensation including a second capacitive coupling positioned a second time delay away from the first capacitive coupling, the second capacitive coupling having generally the same magnitude but an opposite polarity as compared to the first capacitive coupling, the third zone of crosstalk compensation including a third capacitive coupling positioned a third time delay away from the second capacitive coupling, the third capacitive coupling having an opposite polarity and generally the same magnitude as the undesired capacitive coupling of the plug, the method comprising:
positioning the first, second and third capacitive couplings in initial positions in which the first, second and third time delays are generally equal to one another; and
adjusting the position of the second capacitive coupling from the initial position to provide improved crosstalk compensation.