Tektronix, Inc.

Tektronix International Sales Gmbh

Koichi Sega

Kyle L Bernard

Yoneo Akita

Hideaki Ogata

Katsushi Ogata

In order to easily understand the relationship between communication signals of a plurality of channels, a signal analyzer provides a display showing a stacked bar graphthat stacks powers of the plurality of channels in every time slot with the horizontal axis representing time. A markeris displayed on the graphand parameter information in the time slot corresponding to the display position of the markeris also displayed in a table. If the display position of the markermay change and the parameter information for the time slot is not displayed in the table, the display range of the parameters in the tableis changed in synchronism with the displayed marker position. Additionally, power related information of each channel in the time slot corresponding to the display position of the markermay also be displayed in a display column

Power display for communication signal and signal analyzer

The present invention is directed to a display for easily understanding time changes of communication conditions of channels using a plurality of sub-carriers. Layers corresponding to the plurality of channels are displayed along the time base in such a manner that width of each layer is determined in accordance with the number of sub-carriers used for each channel at any given time. Additionally, colors or patterns of each layer may be modified in accordance with modulation types or power levels of the corresponding layer. The relationship between colors or patterns of the layer and modulation types or power levels is displayed.

Measurement apparatus, displays and methods for indicating channel status

An RF/IF signature trigger for acquiring received RF signal data is generated by correlating the received RF signal data in the form of a time domain RF/IF signal, a detected RF/IF signal and/or a frequency domain RF/IF signal with a reference signal defined by a signal signature record representing desired/undesired RF/IF signal patterns, detected RF pulse shapes, special RF markers used specifically for triggering signal acquisitions, particular signal patterns of interest and the like. The resulting correlation factor continuously calculated in real time is compared with a variable correlation threshold such that when the correlation factor reaches the variable correlation threshold, either positive or negative, the RF/IF signature trigger is generated to acquire the received RF signal data for analysis.

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Saitama, Japan

Koichi Sega