Hi,
I was doing a simple wireless communication - using transmitter(sku: WRL-08946) and receiver(sku: WRL-08949) form sparkfun.
I need the delay between transmit and receive in (if possible) in nano-second.
Right now I am getting my delay in 90-110 micro second, some time in 50 micro second.
ALso if there any other transmitter or receiver I should use to get Nano-second delay please let me know.
Please let me know, i need it very urgently.
Thanks
Where are you measuring this delay?
Remember, the radio waves travel at about a foot per nanosecond. If your range is longer than 1 foot, you have already lost.
A 1 nanosecond square wave has a frequency of 1 GHz. If you want your computer to send something to the transmitter which transmits it through the air to the receiver to another computer all within a nanosecond, you are going to need some serious engineering.
(You are using a 434 MHz RF tranceiver. Only one half of an RF cycle is transmitted in 1 ns!)
RF travels about 1 foot in 1 nanosecond
nanosecond measurements and hardware at that speed is impractical for the casual hobbyist or student.
Hi thanks for reply… but I don’t need in 1 Nano-second. I am having transmission in micro-second as i said, which is i think by default.
For measurement I am using oscilloscope, channel 1 → dataIN and channel 2 → dataOUT. then difference between channel 1 and 2.
The thing is that if i can get delay even in 900 nano second or even 10 or 20 micro-second that would be perfect too.
I have another question the transmitter/receiver is rated for optimal output at 5V, but when i put 3.94V with around 10Hz bandwidth only then I get 30-45 microsecond range. But if anything changes even a little bit signal distorts. but with optimal setting i am getting 110 micro second delay. which means this is the stable and accepted situation. But Can you give any idea why i am getting a range of 30-45 microsecond??? although both case i am getting perfect output.
Thanks for clearing up the 1 nS thing.
Even still, it appears that the tranceiver pair you have chosen aren’t fast enough-though I doubt that any cheap, hobbyist style radio would be fast enough anyway… I would suspect the delay in the SAW filter. I don’t know why it works better at low voltages.
Ok so do you know any good transmitter/receiver or simple transceiver (which i dont need to set config using program) that I can use to get my expected delay.
Or I am not too sure but if needed i can also build using component … but i am not too sure about the design.
Can you or Anyone else give me name of some good and fast transmitter/receiver or transceiver??? It will be very helpful for me.
Thanks in advance…