How many channels can I use at once with the RF-24G

Wireless & IoT
1

I have a project where I need 16 RF-24G’s sending data to a base unit with 8 of the RF-24G’s so I can have 16 receive channels I see in the data sheet that the channels must be 8 mhz apart so that would need channels 1 - 121 is there any problems with using all of those channels in the US, I don’t want to get into any trouble with the FCC. Also can that many units work together without interfering with each other they will all be within 50 feet of each other.

Thank you

Craig

2

WeirdScience:
I have a project where I need 16 RF-24G’s sending data to a base unit with 8 of the RF-24G’s so I can have 16 receive channels I see in the data sheet that the channels must be 8 mhz apart so that would need channels 1 - 121 is there any problems with using all of those channels in the US, I don’t want to get into any trouble with the FCC. Also can that many units work together without interfering with each other they will all be within 50 feet of each other.

Thank you

Craig

I thought that no 2 channels on the same RF24G could be within 8MHz, so you can use 1 and 8 on one unit, 2 and 9 on the next etc etc

3

I know that for 2-channel RX, the second channel is automatically 8 above the first (they don’t give you a choice). But you could stagger each unit, like #1 is on 1 and 8, #2 is on 2 and 9, etc. If you’re TX’ing at 250K I don’t think they’ll interfere, but they sure will at 1Meg.

And the FCC won’t bother you as long as you’re not taking your clothes off on TV. :wink:

4

Pete-O:
I know that for 2-channel RX, the second channel is automatically 8 above the first (they don’t give you a choice). But you could stagger each unit, like #1 is on 1 and 8, #2 is on 2 and 9, etc. If you’re TX’ing at 250K I don’t think they’ll interfere, but they sure will at 1Meg.

And the FCC won’t bother you as long as you’re not taking your clothes off on TV. :wink:

OK,I’ll give it a try I thought it had to be 8 apart to keep from interfering. I have 2 of the Spark Fun units so I’ll just order one of the 2 channel recieve units and start testing.

Thank You both for the info.

Craig

5

Pete-O:
I know that for 2-channel RX, the second channel is automatically 8 above the first (they don’t give you a choice). But you could stagger each unit, like #1 is on 1 and 8, #2 is on 2 and 9, etc. If you’re TX’ing at 250K I don’t think they’ll interfere, but they sure will at 1Meg.

According to the Nordic data sheet , adjacent channel selectivity is not

too good, -20 dB at 1 MHz, but this increases to -43 dB at 3 MHz.

I would use channels 4 MHz apart. In other words, one receiver handles

2.402 GHz and 2.410 GHz and another handles 2.406 GHz and

2.414 GHz, etc.