基于计算机声卡的频谱分析仪屏幕采集程序，可以抓取非程控频谱分析仪的地屏幕显示-Screen capature program basing on PC sound card, enable screen capture for those spectrum analyzer with no GPIB port.

dephi 7 开发的8593频谱仪检测无线电信号用的（含有完整的代码的）-Dephi 7 development of the 8593 spectrum analyzer for the detection of radio signals (with complete code)

Cheap spectrum analyzer and signal generator.