Anritsu Corporation

Kazunori Kitagawa

Takeshi Kobayashi

Masaki Hizume

To prevent the complete omission of a log due to log information which is destroyed since it cannot be transmitted, when the communication log information of a plurality of layers is transmitted and a log is displayed at a transmission destination. A test deviceincludes a log header generating unitthat generates a log header including layer identification information and time information, a log data generating unitthat generates log data including communication data, a test-device-side transmitting unitthat transmits the log header and the log data to a display device, and a priority control unitthat performs control such that the log header is transmitted prior to the log data. A display control unitof the display devicedisplays a log such that the log header is associated with the log data.

Test system, test method, and test device

Four (=M) transmission information signals are output from transmission information generating unit to linear transform unit, where they are transformed into synthesis signals by linear transform expressed by multiplication by a 2&#xd7;4 matrix having complex numbers as elements. Signal processors perform signal processing corresponding to the modulation technique of test target on synthesis signals. On the resultant signals, 2&#xd7;2 channel processing unit performs 2&#xd7;2 pseudo channel processing, thereby forming equivalent M&#xd7;N channels. Parameter setting unit sets information necessary to acquire desired M&#xd7;N channel characteristics as the synthesis characteristics of linear transform unit and N&#xd7;N channel processing unit.

Growing community of inventors

Kanagawa, Japan

Kazunori Kitagawa