JPH0418370U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a block diagram showing an embodiment of this invention.
Figure 2 is a block diagram showing a conventional digital spectrum analyzer, and Figure 3 is a digital zoom circuit 1.
FIG. 4 is a block diagram showing a specific example of No. 4;

Claims (1)

[Claims for Utility Model Registration] An AD converter that converts an input analog signal into a parallel digital signal, and a means for inputting the parallel digital signal from the AD converter, converting it into a serial digital signal, and outputting it. , means for converting the serial digital signal from the digital zoom circuit into a parallel digital signal, and an interface circuit for selecting either the converted parallel digital signal or the input parallel digital signal and outputting the selected one to the data bus. , a central processing unit connected to the data bus; a memory connected to the data bus and storing data on the data bus; and a memory connected to the data bus and performing fast Fourier transformation on the data stored in the memory. A parallel-to-serial conversion circuit connected to the data bus and converting parallel digital signals on the data bus into serial digital signals; A digital spectrum analyzer comprising: a multiplexer for selecting one of the converted serial digital signals; and the digital zoom circuit to which the serial digital signal selected by the multiplexer is supplied.