I (hobbyist) was trying out the new (to me) oscope ( tek 2236 ) by trying a suggestion of looking at various waveforms from different equipment around the house , clock radio/oscilators/crystals/wall-wart etc.
i decided to crack open the $5 - 49.86 MHz remote control transmitter and sample the 49.86 MHz crystal and i was wondering what i should expect to see ?
it appears to be (in the best viewing case) a 49.86 MHz sine wave about 2.4 volts. i say 49.86 because the DMM displays that as frequency (as does crystal pkg)
however with diff oscope settings and adjustments there appears to be either a simultaneous super-imposed wave just slightly lower amplitude (.3v) and slightly less than sine like , maybe flatter and the peaks a little wider like a squashed sine wave ? then yet another setting i get what appears to be 3 or 4 of the sine waves super imposed all same magnitude with a slight horiz offset (1/10 of 1 graticule division) but they appear to be intertwined and kind of dancing in tight circle where it appears (3d'ish) the waves undulate toward/away (dimmer and brighter while moving appears to move toward ) very slight but perceptable to my eye fairly easily.
is there a typicle way that data is sent with simpl 4 button 49 MHz remote transmitter ? just wondering what i should expect to see when pressing a button.
thanks for any info robb