The Design And Implementation Of Control Module For High Frequency Signal Source Based On ARM9

It can provide high efficiency and broadband local oscillator for high frequency signal source, I selected the chips for the AD9858of direct digital frequency synthesis (DDS) and the chips for ADF4106of phase lock loop (PLL) frequency synthesis. The DDS can export the frequency in the400MHz, and PLL can export the9GHz,11GHz and12.5GHz for the center of the high frequency, their union can make the output of the signal frequency become more range and more widely.At the same time, I selected the GUI interface as the man-machine, so it can control the output of the signal source commodiously. Besides I still choose the BC7281B chips as the external keyboard. External keyboard can enter the numbers, delete numbers and select the focus in the edit box, in addition it can trigger events to send control word to DDS or PLL,so that they can exports the signal.The control module of this paper is finished in Linux system. the user layer is based on GUI interface of QTE, the driver is based on character device driver to be finished. The DDS make true.the sweep frequency from the starting frequency to the upward frequency. It can use four button change four central frequency, it also realized the output of the high frequency for PLL.