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8信道GM300接口:8 channel unitspin 1 = int spkr megative (not gnd) pin 2 = mic audio, 80mv for 60%dev pin 3 = mic ptt pin 4 = not used pin 5 = flat tx audio, 150mv for 60%dev pin 6 = not used pin 7 = gnd pin 8 = cor active low ruindicator follows tone if used. pin 9 = not used pin 10 = ign control pin 11 = disc audio, 600mv controlled by ju551 pin 12 = not used pin 13 = sw a+ 1/2 amp max! pin 14 = remote hook sw pin 15 = int spkr pos pin 16 = ext spkr pos16信道GM300接口: same as above except: pin 4 = programmable output defaults to external alarm. pins 6,8,9,12,14 = programmable i/o (the options can be viewed with the rss)中继连线:based on the above information this is how the cross-connection between the radios should go!radio1 radio2pin 3 ptt ___________________ pin 8 corpin 8 cor ___________________ pin 3 pttpin 5 tx audio ___________________ pin 11 disc audiopin 11 disc audio ___________________ pin 5 tx audiopin 7 gnd ___________________ pin 7 gnd**** caution **** check to see the programable outputs of the 16 pin connector prior to hooking up. also, the 5 pin radios will not do this because you can't get cos and ptt outputs. 以上资料表明,16信道与8信道GM300的接口是有区别的,就是有些引脚功能是可以通过编程定义的,这些脚中,与中继有关的只有8脚。所以请检查是否8脚被定义为别的功能了。另外,我记忆中,GM300做中继使用,似乎需要短接话筒接口的2脚与6脚。下图左侧为16信道的GM300接口图,右侧为8信道的GM300接口图。
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请问maxtrac,后面针脚都是5针的,不知其定义如何?怎样搭接中继?
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已经通过另外的方法彻底解决了这个问题了!(通过改变中继连接线的制作)相关信息可以qq上联系!
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感觉楼主不厚道,楼上好多热心ham无私奉献资料帮助你,尽管可能没有帮上忙,但是你弄好了,却私下保密,汗颜啊!
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救命。我按照你们这样写一下gm300 350mhz的机器,死了,没显示,机器有电到面板照明灯亮,不能读写机器。