Ok, now it is clear and not so muddy. Good to know just what I am looking at instead of being confuddled by terms I know not.
clay On 23 Sep 2007, at 16:45, Craig McCluskey wrote: > On Sun, 23 Sep 2007 13:18:49 -0700 Redghost <[EMAIL PROTECTED]> > wrote: > >>> Redghost wrote: >>>> Motorola Spirit 1 >>>> model # P23KNC00A3AA >>>> >>>> >>>> F1 >>>> -T 154.600grn >>>> -R 154.600 grn >>>> >>>> handie talkie fm radio >> >> That about sums up most of the data. What else is there to know >> about a radio? IS it only FM or is it UHF/VHF? Where would this >> thing have been used? >> >> thanks for the data > > I see we have some confusion here. > > FM is a type of modulation: frequency modulation, where the > transmitter's > frequency is varied according to the voltage of the (audio) signal > to be > transmitted. > > Another type is AM, amplitude modulation, where the transmitter's > amplitude (power level) is varied according to the voltage of the > (audio) > signal to be transmitted. > > There are others, but these are the main two people run into. > > Either type may be used with any frequency of transmitter. > > The problem is that people assume that amplitude modulation has to > be used > at a frequency that corresponds to the AM broadcast band, about 1 > MHz, and > FM has to be used at a frequency that corresponds to the FM broadcast > band, about 100 MHz. They do not. FM is typically used at higher > frequencies because it takes more bandwidth -- the FM broadcast > channels > are 200 kHz apart while the AM broadcast channels are 10 kHz apart. > > The frequency bands are (very!) roughly (and subject to disagreement): > > 300 kHz - 3 MHz Long wave > 3 MHz - 30 MHz Short wave, high frequency (HF) > 30 MHz - 300 MHz very high frequency (VHF) > 300 MHz - 1000 MHz Ultra high frequency (UHF) > > So, your handie talkie radios are FM modulated VHF radios. > > > Craig > > _______________________________________ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
