RFID frequency

[Jane]

As far as I know, RFID can use a different frequencies. Is there any way how I can check what frequency my RFID uses ?

Thank you.

[Xenon Photon]

Spectrum analyzer on a powered device.
Btw, this is the general chat form!

[digsys]

There are 3 main frequencies, which are usually standard, but some manufacturers do have a slight propritary version.
The type of tag can give it away - clothing, vehicle, animal. Plus if it is short / long range ie 10cm ... 4M
What is it used for? That's a starting point. More info needed.

[Halcyon]

Btw, this is the general chat form!

It should still be kept electronics/technology related for the most part. The OP's post is fine here.

[albert22]

For the low frequencies ( 125 or 134 kHz ) I have used a small coil near the reader and checked the frequency on an oscilloscope. Probably the method will work for 13.56 MHz too.
Take into account that the reader will send  bursts and not a continuous waveform.
If you only have the tags and not the reader, it gets more complicated- Perhaps a Grid Dip meter could be used
https://en.wikipedia.org/wiki/Grid_dip_oscillator

[Mad ID]

For the low frequencies ( 125 or 134 kHz ) I have used a small coil near the reader and checked the frequency on an oscilloscope. Probably the method will work for 13.56 MHz too.
Take into account that the reader will send  bursts and not a continuous waveform.
If you only have the tags and not the reader, it gets more complicated- Perhaps a Grid Dip meter could be used
https://en.wikipedia.org/wiki/Grid_dip_oscillator

Or simply connect long ground lead which comes with probes to the tip and that loop is just fine to check the frequency.