Digitized stratum echo signal simulator
An echo signal and simulator technology, applied in the field of signal simulators, can solve problems such as constant analog signal amplitude, no formation echo structure characteristics and time domain characteristics, and lack of universality
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Embodiment 1
[0026] Example 1 (simulator without remote control)
[0027] refer to Figure 7 , making a digital formation echo signal simulator, which includes:
[0028] A DDS integrated circuit uses the AD9834 chip, which has an output amplitude adjustment function. The direct digital synthesis (DDS) unit is used to generate a very precise frequency sinusoidal signal output, and its frequency accuracy can reach 1 / 228 of the maximum output frequency or Higher, and the distortion is very small; the waveform diagram of the signal output by the DDS integrated circuit chip is as follows Figure 4 shown;
[0029]One controller adopts ADUC812 chip. On the one hand, the microcontroller can set the frequency of the DDS integrated circuit output signal through the control line, and can also output an analog signal to control the amplitude of the sine wave output by the DDS, so that it can be used in the DDS A continuous sine wave signal with stable frequency and adjustable amplitude is obtained ...
Embodiment 2
[0040] Embodiment 2 (simulator with remote control)
[0041] Such as Figure 7 As shown, the simulator also includes an RS232 interface, the RS232 interface adopts a Max3232 chip, and is electrically connected to the controller for remote control of the simulator. All keyboard input parameters can be realized through the RS232 interface, through which automatic measurement can be realized. Other requirements are as described in Example 1.
Embodiment 3
[0042] Embodiment 3 (simulator with remote control)
[0043] Such as Figure 7 As shown, the simulator also includes a USB controller, the interface USB controller adopts a Cy7c68013 chip, and is electrically connected with the controller for remote control of the simulator. All keyboard input parameters can be realized through the USB controller, through which automatic measurement can be realized. Other requirements such as
[0044] Described in Example 1.
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