Need Emissions Designator for nRF52832

[TomJ]

We are trying to determine the emission designator for the nRF52832, or at least to determine the necessary bandwidth so that we can create the emissions designator. Please advise. We need this to complete the product approvals.

Please advise.

[Andreas]

Hi,

 

The emission designator for NRF52832 is G1D. Channel bandwidth depends on how you're using the radio, but either 1 or 2 MHz for 1 Mbps and 2 Mbps, respectively.

 

Best regards,

Andreas

[AmbystomaLabs]

Actually, channel bandwidth comes from the 99% bandwidth test that the test house provided with the report. Whomever you are submitting to (eg, ISED formally Industry Canada) expect it to be the same as stated in the report.  Not all BLE devices with the same chipset will have the exact same 99% bandwidth and the resolution of the spec allows for a few different values with the same modulation. So, you can't just copy this number from someone else, you have to actually take it from the test data.

BLE uses FSK a form of FM modulation.  So, the emission classification should be F1D not G1D. G is for phase modulation such as DQPSK, BPSK, QPSK, etc.  So F is for frequency modulation, 1 is for quantized info ie, data, D is for data transmission.

It's an ITU standard but the ISED info on it is pretty easy to read: www.ic.gc.ca/.../sf00057.html

[Andreas]

Hi, 

 

You are correct, thank you for arresting me and clearing this up.

 

While BLE uses FSK as you say, using the PSK classification seems more prevalent for BLE possibly due to the connection with classic Bluetooth. Using G1D is however accepted, ref this.

 

NOTE: Whenever frequency modulation "F" is indicated, Phase modulation "G" is also acceptable.

 

In any case I stand corrected, F1D is the correct designator.

 

Best regards,

Andreas