Device having communication function, method for automatically adjusting transmitter, system and program

The automatic transmitter adjusting method of a transmitting device which has a pair of devices each having a transmitter and a receiver, in which a transmitter of a first device is connected to a receiver of a second device, and a transmitter of said second device is connected to a receiver of said first device for two-way transmission;

• said method comprising:
• a transmission processing step of transmitting sample data while changing the setting of an output amplitude and/or emphasis of the transmitter of said first device within a prescribed range;
• a receiving processing step of generating an eye diagram from the sample data received by the receiver of said second device, and detecting and transmitting phase-range data from said eye diagram;
• an optimization processing step of writing the phase-range data transmitted from said second device into a table in correspondence to said output amplitude and/or emphasis of which the setting has been changed, and determining optimum values of said output amplitude and emphasis from said table obtained at the end of setting change within said prescribed range for setting the optimum values in the transmitter of said first device;
• wherein:
• said transmission processing step initializes the maximum values of the output amplitude and emphasis, transmits sample data to the transmitter of said first device, and then, in a state in which said emphasis is fixed at the maximum value, transmits the sample data while changing the setting of said output amplitude within a prescribed range;
• said receiving processing step receives the sample data transmitted while changing the setting of said output amplitude within the prescribed range in a state in which said emphasis is fixed at the maximum value, generates an eye diagram, and detects and transmits receivable phase-range data from said eye diagram;
• and
• said optimization processing step writes the phase-range data transmitted from said second device into the table in correspondence to said output amplitude of which the setting has been changed and determines an optimum value of said output amplitude from said table obtained at the end of the setting change within said prescribed range;
• a transmission processing step of transmitting the sample data while changing the setting of the output amplitude and emphasis of the transmitter of said second device within a prescribed range;
• a receiving processing step of generating an eye diagram from the sample data received by the receiver of said first device, and detecting and transmitting receivable phase-range data from said eye diagram;
• and
• an optimization processing step of writing the phase-range data transmitted from said first device into a second table in correspondence to said output amplitude and emphasis of which the setting has been changed, and determining optimum values of said output amplitude and emphasis from said second table obtained at the end of setting change within said prescribed range for setting the optimum values in the transmitter of said second device;
• wherein:
• said transmission processing step initializes the maximum values of the output amplitude and emphasis, transmits sample data to the transmitter of said second device, and then, in a state in which said emphasis is fixed at the maximum value, transmits the sample data while changing the setting of said output amplitude within a prescribed range;
• said receiving processing step receives the sample data transmitted while changing the setting of said output amplitude within the prescribed range in a state in which said emphasis is fixed at the maximum value, generates an eye diagram, and detects and transmits receivable phase-range data from said eye diagram;
• and
• said optimization processing step writes the phase-range data transmitted from said second device into the table in correspondence to said output amplitude of which the setting has been changed and determines an optimum value of said output amplitude from said second table obtained at the end of the setting change within said prescribed range.

An automatic transmitter adjusting system which has a pair of devices each having a transmitter and a receiver, wherein two-way transmission is accomplished by connecting the transmitter of a first device to the receiver of another device, and the transmitter of the another device to the receiver of the first device;

• each of said devices comprising:
• a transmission processing unit which transmits sample data to the other device while changing a setting of an output amplitude and/or emphasis of own transmitter within a prescribed range;
• an optimization processing unit which writes the phase-range data transmitted from the other device into a table in correspondence to said output amplitude and emphasis of which the setting has been changed, determines an optimum values of said output amplitude and emphasis from said table obtained at the end of setting change within said prescribed range, and sets the optimum values for own transmitter;
• and
• a receiving processing unit which generates an eye diagram from the sample data from the other device, detects the receivable phase-range data from said eye diagram, and transmits the detected receivable phase-range data to the other device;
• wherein:
• the transmission processing unit of said first device transmits the sample data while changing the setting of the output amplitude and emphasis of the own transmitter within a prescribed range;
• the receiving processing unit of said other device generates an eye diagram from the sample data received by the own receiver, detects receivable phase-range data from said eye diagram, and transmits the phase-range data;
• and
• the optimization processing unit of said first device writes the phase-range data transmitted from said other device into the table in correspondence to said output amplitude and emphasis of which the setting has been changed, determines optimum values of said output amplitude and emphasis from said table obtained at the end of setting change within said prescribed range, and sets the optimum values for the own transmitter.

A computer-readable storage medium which store an automatic transmitter adjusting program causing a computer of each of a pair of devices each having a transmitter and a receiver, wherein two-way transmission is accomplished by connecting the transmitter of a first device to the receiver of the other device via a transmission line, and the transmitter of the other device to the receiver of the first device via another transmission line, to execute:

• a transmission processing step of transmitting sample data while changing a setting of an output amplitude and emphasis of the own transmitter within a prescribed range;
• an optimization processing step of writing a phase-range data transmitted from said other device in correspondence to said output amplitude and emphasis of which the setting has been changed, determining an optimum values of said output amplitude and emphasis from said table obtained at the end of setting change within said prescribed range, and setting the optimum values for the own transmitter;
• and
• a receiving processing step of generating an eye diagram from sample data received by the receiver of said other device, detecting the receivable phase-range data from said eye diagram, and transmitting the receivable phase-range data;
• wherein:
• said transmission processing step transmits sample data while changing the setting of said output amplitude within a prescribed range in a state in which said emphasis is fixed at a maximum value, after initializing the maximum values of the output amplitude and emphasis in the own transmitter and transmitting the sample data;
• and
• said optimization processing step writes phase-range data transmitted from the transmission destination device in correspondence to said output amplitude of which the setting has been changed, and determines an optimum value of said output amplitude from said table obtained at the end of setting change within said prescribed range.