求大神解答，先来段英文
I have older Televisions, therefor i need to send Analog UHF PAL B/G signal to the cables. Please try to advice a cheap solution for that. I need to send the same singnal into analog televisions what i have in DVB-T modulator. I think i will need to scale down the resolution
  自己翻译的意思就是要传输模拟信号。然后这个系统里面已经有DVB-T的数字信号，这样做的话可以吗，然后可以应该怎么做