I used PIN silicon photodetector. About saturation, I had checked it
by connecting the oscilloscope, which displayed the obvious modulation
signal expect for noise and DC level up. I did not use very strong
flashlight to avoid too much photocurrent. Besides the lock-in didn't
show OLVD("overload") warning.
Re: Lock-in puzzle ... by connecting the oscilloscope,... signal expect for noise and DC level up. ... What's the chopping rate of the modulation and the response time of the PIN diode circuit your using. ... When you add the light from the flashlight does the modulation still show sharp rise and fall with square corners? ... (sci.optics)
Re: Demodulating AM pulse width coding (long post) ... three modulation options together. ... unmodulated signal while B1xx is AM of the PWM and B2xx is Manchester ... since each carrier cycle's maxima will always occur in the ... this would not be very robust in the presence of noise.... (comp.dsp)
Re: Demodulating AM pulse width coding (long post) ... three modulation options together. ... unmodulated signal while B1xx is AM of the PWM and B2xx is Manchester ... since each carrier cycle's maxima will always occur in the ... this would not be very robust in the presence of noise.... (comp.dsp)
Re: Event at a specific moment of a data acquisition ... the oscilloscope I was using was quite limited in the ... range that I could observe while zooming. ... the noise of my comparator signal was located in the falling edge (the ...rising edge noise at the output of the Schmitt trigger. ... (comp.lang.labview)
Re: Is there a program to display what modulation looks like? ... The best way to gain understanding in the different modulation techniques is ... to view active signal with both an oscilloscope and a spectrum... > in the General class book are better than the ones in the Technician... (rec.radio.amateur.misc)
