I've been working with TSOP IR receivers and emitters on robots since the past year. With multiple robots communication we have signal collision algorithms and such. We still faced a lot of interference from the fluorescent bulbs. We have tried covering the receiver from the top. I need a deeper understanding of the datasheet of Vishay TSOP 34156 receiver. This is the datasheet: https://www.pololu.com/file/0J19/TSOP34156.pdf
These are my questions :
What does transmission distance mean in terms of the receiver? As far as I know it doesn't transmit anything.
What is directivity? Angle of half transmission distance?
Figure 9 : max envelope duty cycle vs burst length?
"Burst length should be 6 cycles/burst or longer. After each burst which is between 6 cycles and 70 cycles a gap time of at least 10 cycles is necessary. For each burst which is longer than 1.8 ms a corresponding gap time is necessary at some time in the data stream. This gap time should have at least same length as the burst. Up to 2200 short bursts per second can be received continuously." What is burst length exactly?What exactly do you mean by a cycle? I have tried to find the information on cycles unsuccessfully. This is how my communication protocol looks like.
Legend for the image : signature bit(high) : 1200 uS interval(low) : 300uS zero (high) : 300uS one (high) : 600uS I transmit total of 32 bits consisting of 1s and 0s and intervals in between them excluding the signature wave.
In terms of cycles what does this mean? Where do I stand? within the limits or I have to send shorter bursts of data? Is the TSOP34156 good for a swarm robotic purpose or are there better IR receivers out there that I do not know of?