Oh in any case it should amplify it from what the simulation indicates, yes voltage p-p is dropped by half at the output of the amplification if it goes to like 50mV amplitude, but the opamp (schmitt trigger) amplifies it back up to 6V.
From what I remember of last semester the receiver picked up anywhere between 50-200mv p-p at the most distant extremes. This was 2 metres from the transmitter. I also had 'noise' issues or maybe the ocmponents I choose were not right for the job where the received signal would just muffle or flicker spontaneously if you know what I mean on the oscilloscope. And sometimes it would reach saturation and not show anything at all - it would go just flat or as a vertical line on the display that won't respond to any distance change.
When those guys were assessing me last semester they thought it was noise and suggested I use a notch filter at the receiver. But from memory when I was simply testing the receiver by itself (that is, it connected to the oscilloscope directly. No circuitry) it always picked up a clean but weakened sine wave from the distance of around 2 metres from the transmitter. No noise, and people were talking in the background. I always tested in indoor conditions. It's an indoor product meant-to-be.
I'm not too sure why the previous receivers failed last time, they failed to simulate properly on multisim when I checked this time, so I hope this time it works. I'll need to check on a real oscilloscope on monday and see what happens.
From what I remember of last semester the receiver picked up anywhere between 50-200mv p-p at the most distant extremes. This was 2 metres from the transmitter. I also had 'noise' issues or maybe the ocmponents I choose were not right for the job where the received signal would just muffle or flicker spontaneously if you know what I mean on the oscilloscope. And sometimes it would reach saturation and not show anything at all - it would go just flat or as a vertical line on the display that won't respond to any distance change.
When those guys were assessing me last semester they thought it was noise and suggested I use a notch filter at the receiver. But from memory when I was simply testing the receiver by itself (that is, it connected to the oscilloscope directly. No circuitry) it always picked up a clean but weakened sine wave from the distance of around 2 metres from the transmitter. No noise, and people were talking in the background. I always tested in indoor conditions. It's an indoor product meant-to-be.
I'm not too sure why the previous receivers failed last time, they failed to simulate properly on multisim when I checked this time, so I hope this time it works. I'll need to check on a real oscilloscope on monday and see what happens.