多通道输出可调的PCM信号源设计

The design of PCM signal source of multi-channel output adjustable

针对遥测PCM模拟源输出信号单一及参数不可调的问题,提出了一种多通道波形输出可调的PCM信号源的设计。设计中以FPGA作为逻辑控制芯片,充分利用其灵活性、内部资源与特点。在对信号源设计方案和硬件电路简要描述的基础上,重点介绍了其通信协议和软件实现方法,最后对信号源进行了试验。试验结果表明,该信号源能够实现1 024以内任意通道输出波形可调的功能,并支持8位和16位字长可选。

Aiming at the problem of PCM telemetry analog source for single output signal and non- adjustable parameters, this paper proposes a PCM signal source design of multi- channel waveform output adjustable. This design takes FPGA as the logic control chip, and makes full use of its flexibility, internal resources and features. On the basis of a brief description of the signal source design solutions and the hardware circuit, it mainly introduced the communication protocol and software implementation method. Finally, the signal source is tested in many aspects. The test results show that the signal source can achieve the function of 1 024 arbitrary channel output waveform adjustable, and supports 8 bit and 16 bit word length.