Signal analyzer having partially scrolling function for display

Details Signal analyzer having partially scrolling function for display Signal analyzer having partially scrolling function for display

1988-03-02

1989-12-26

Brigance, Gerald

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340726, 324 77B, G09G 100

Patent

active

048900990

ABSTRACT:
An input processing section outputs a digital signal corresponding to a frequency sweep range of an input signal. A memory stores the digital signal. A display displays the digital signal stored in the memory as an image which is developed along a frequency axis. A scroll command section provides a command for shifting the image. A controller supplies, prior to the command, control signals to the input processing section, for causing the input processing section to process the input signal in a first frequency sweep range and supplies, and to the memory, for causing the memory to store the digital signal. When the command is received, the controller supplies control signals to the input processing section for causing the input signal to be processed in a second frequency sweep range in accordance with a content of the command, and to the memory for causing an address range of the memory to shift and the memory to store the obtained digital signal. The display displays an image of the second frequency sweep range continuously with the image of the first frequency sweep range which is shifted in accordance with the command.

REFERENCES:
patent: 4244024 (1981-01-01), Marzalek et al.
patent: 4257104 (1981-03-01), Martin et al.
patent: 4611164 (1986-09-01), Mitsuyoshi et al.
Control and Instrumentation; vol. 13, No. 4, Apr. 1981; pp. 50-51.
Toute L'Electronique, No. 493; Apr. 1984; pp. 21-26.
Elektronik, vol. 29, No. 2, 24th Jan. 1980; pp. 31-38.

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