1. A method for dynamically tuning a power line communication system comprising an inductive coupler, a tank circuit comprising a plurality of capacitors, a first transmitter, and a receiver, said method comprising:
installing said inductive coupler without a power outage;
passing a first selected carrier frequency signal generated by said first transmitter through said coupler;
receiving said first selected carrier frequency signal at said receiver;
measuring amplitude of said received first selected carrier frequency signal;
switching said capacitors in and out of said tank circuit until said measured amplitude of said received first selected carrier frequency signal is near a maximum;
passing a second selected carrier frequency signal generated by said first transmitter through said coupler;
receiving said second selected carrier frequency signal at said receiver;
measuring amplitude of said received second selected carrier frequency signal; and
switching said capacitors in and out of said tank circuit until said measured amplitude of said received second selected carrier frequency signal is near a maximum;
wherein said second selected carrier frequency signal is different from said first selected carrier frequency signal.
2. A method as in claim 1, further comprising switching to a second transmitter for data transmission.
3. A method as in claim 1, wherein said plurality of capacitors are switched by a relay controller receiving commands from a microprocessor.
4. A method as in claim 1, wherein said step of passing said second selected carrier frequency signal generated by said transmitter through said coupler is performed in response to one or more changes in power line conditions.
5. A method as in claim 1, wherein said step of passing said second selected carrier frequency signal generated by said transmitter through said coupler is performed in response to one or more changes in temperature.
6. A method as in claim 1, wherein said step of passing said second selected carrier frequency signal generated by said transmitter through said coupler is performed in response to one or more changes in frequency of said first selected carrier frequency signal.
7. A method as in claim 1, wherein said step of passing said second selected carrier frequency signal generated by said transmitter through said coupler is performed in response to one or more changes in signal-to-noise ratio on a power line.
8. A method as in claim 1, wherein said tank circuit is a parallel circuit in series with a power line.
9. A method as in claim 1, wherein said step of installing said coupler without a power outage comprises:
installing said inductive coupler on an insulated medium tension rated cable section;
installing said insulated medium tension rated cable section with inductive coupler installed in parallel with a section of distribution cable;
removing said section of distribution cable, thereby making a distribution cable line frequency current pass through said inductive coupler;
establishing communication between said inductive coupler and said transmitter and receiver;
establishing communication between said inductive coupler and a relay controller in communication with a microprocessor in communication with said plurality of capacitors; and
establishing communication between said inductive coupler and said plurality of capacitors in communication with said microprocessor.
10. A method of installing an inductive coupler, comprising:
installing said inductive coupler on an insulated medium tension rated cable section;
installing said insulated medium tension rated cable section with inductive coupler installed in parallel with a section of distribution cable;
removing said section of distribution cable, thereby making a distribution cable line frequency current pass through said inductive coupler;
establishing communication between said inductive coupler and a transmitter and receiver; and
establishing communication between said inductive coupler and a microprocessor in communication with a plurality of capacitors.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An image forming apparatus comprising:
a housing having an opening;
a cover portion that can be disposed so as to cover the opening;
a first connecting portion that connects the cover portion with the housing so that the cover portion is pivotable about a first pivotal axis and can switch between a closed state in which the opening is covered and an opened state in which the opening is exposed;
a decorative portion that is disposed to be aligned with the cover portion on a side to the first pivotal axis in the cover portion, and forms a predetermined outer face of the housing along with the cover portion in the closed state; and
a second connecting portion that connects the decorative portion with the housing so that the decorative portion is pivotable about a second pivotal axis, which is coaxial with or substantially parallel to the first pivotal axis, in a direction substantially the same as the cover portion.
2. The image forming apparatus according to claim 1,
wherein the first connecting portion has a connecting member that connects the first pivotal axis with the cover portion,
and wherein the connecting member
contacts a free end of the decorative portion, which is on an opposite side of the second pivotal axis, in a case where the cover portion is at a predetermined pivoted position in the opened state and
pivotally moves the decorative portion about the second pivotal axis in a case where the cover portion pivotally moves to exceed the predetermined pivoted position.
3. The image forming apparatus according to claim 1, further comprising a biasing portion that biases the decorative portion so as to maintain a state forming the predetermined outer face of the housing.
4. The image forming apparatus according to claim 1, wherein, in a state where the decorative portion is pivotally moved from a state forming the predetermined outer face of the housing,
the cover portion is pivotally moved so as to make a pivot angle thereof greater than 90 degrees with reference to a pivot angle thereof in the closed state.
5. The image forming apparatus according to claim 2, wherein the connecting member is formed in a U-shape when viewed from a direction of the first pivotal axis.
6. The image forming apparatus according to claim 1, wherein the free end of the decorative portion is disposed in the vicinity of the cover portion in a case where the cover portion is in the closed state.