difference between tx carrier modulated and not

RE: difference between tx carrier modulated and not

FormerMember — Mon, 06 Feb 2017 10:28:20 GMT

In the post you refer to, Ketil does recommend to use the radio_test example for FCC/ETSI. For Bluetooth testing, he recommends to use the DTM example:

For FCC/ETSI testing, most will use the "radio test example" from the SDK and setup the radio to transmit a modulated packet.. .... When Bluetooth testing is required, DTM is the preferred way.

RE: difference between tx carrier modulated and not

annapalu — Fri, 03 Feb 2017 16:23:31 GMT

in this post seems that the dtm example it is useful for fcc test. devzone.nordicsemi.com/.../. Am i wrong?

RE: difference between tx carrier modulated and not

FormerMember — Mon, 30 Jan 2017 11:36:00 GMT

DTM is not made to be used for radio testing (FCC). DTM is specified in the Bluetooth Core Specification, and is intended to be used for BLE testing.

When qualifying for FCC, the radio itself is being tested, and the radio_test example is a lot better for that purpose.

RE: difference between tx carrier modulated and not

annapalu — Mon, 30 Jan 2017 09:16:16 GMT

Thank you for the answer. I'm a little confused, searching on the forum i find that DTM example can be used for the FCC test. What is the differents between DTM and radio_test? Thanks, Anna

RE: difference between tx carrier modulated and not

FormerMember — Thu, 26 Jan 2017 10:01:00 GMT

1) "Start TX carrier" means to start an unmodulated TX carrier, while "Start Modulated TX carrier" means to start a modulated TX carrier.

2) Time on each channel: using command 'd' will apply for RX mode as well. If pressing 'd' and then 'r', the radio will stay the given time in RX on each specified channel.

3) For nRF52832, the maximum output power is +4 dBm. You can set it with the command 'p'.