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RF notch filter design (help)
Does anybody knows any video signal UHF encoder/decoder chips? If there was a chip doing this then there may be an encoder after the antenna amplifier converting the channels...
Friday, 23 November 2007 - 09:59
RF notch filter design (help)
Neil, I would like to know the way how to do this: A group of receivers connected to the same antenna amplifier output, programmable via dip switches for viewing (or not) channels...
Friday, 23 November 2007 - 07:39
RF notch filter design (help)
I have another idea. I think that if there would be an amplifier for each channel image carrier frequency and an amplifier for each channel voice carrier frequency, then the TV...
Thursday, 22 November 2007 - 22:20
RF notch filter design (help)
Yhat seems good. Please, could you be more analytical, because I don't have enough experience on this kind of issues? Thank you.
Wednesday, 21 November 2007 - 08:01
RF notch filter design (help)
Ok, But if I would like to have more than one TVs connected on the same amplyfier output, but with different configuration on the permissive for viewing channels, then this would...
Tuesday, 20 November 2007 - 21:46
RF notch filter design (help)
Of course Jim; I want to make a product using an ATMega48 micro and dip switches used for exclude one to eight channels (selectable) from UHF super band CATV 31-39. The product...
Tuesday, 20 November 2007 - 20:06
RF notch filter design (help)
Is there any other way to do this? I mean is there any other way (not notch filters) to exclude a TV channel without effecting its previous and its next one? My mind focuses on RF...
Tuesday, 20 November 2007 - 15:18
RF notch filter design (help)
Each channel usefull bandwidth is 5MHz +/-2,5MHz from each center frequency. So each channel abstain 1MHz from it's previous one and 1MHz from it's next one. In other words the...
Monday, 19 November 2007 - 12:06
RF notch filter design (help)
Thanks CountZero, I am waiting for your news.
Monday, 19 November 2007 - 10:32
car alarm alert outputs
jayjay1974, Do you know if the most of alarms or all have at least NO relay contact. You know I am trying to find a common characteristic that all car alarms have. Also if there...
Monday, 27 August 2007 - 17:24
Bootloader for ATMega88
Note that if you have changed the fuses RESET DISABLE, ISP ENABLE or DEBUG WIRE ENABLE, you cannot reprogram the micro via ISP programming mode. Also, if you have set the lock...
Wednesday, 20 June 2007 - 06:22
Bootloader for ATMega88
I have used the ISP programming a lot of times before even for the same microcontroller when updating the program and I had no problem. I think that it is more easier to solve...
Tuesday, 19 June 2007 - 14:12