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国内已有单位从法国购进TRT(Telecommunications Radioelectriques etTelephoniques)公司的短波高速串行自适应调解器MDM12/24(PSK,传速600～2400b/s,内有-μc作自适应均衡),美国Harris也曾向国内某单位推销其HF单音modem 5254(PSK,传速75～4800b/s)。TRT的MDM12/24和Harris的5254A(5254
Some domestic units have already purchased the short-wave high-speed serial adaptive demodulator MDM12 / 24 (PSK, transmission speed 600 ~ 2400b / s, with -μc for adaptive equalization) from the French company TRT (Telecommunications Radioelectriques et Teleletions) Has also been to a domestic unit to sell its HF tone modem 5254 (PSK, speed 75 ~ 4800b / s). TRM’s MDM12 / 24 and Harris’s 5254A (5254)