Continuous Modulated pattern

[masamasa]

Hi, 

I'm using nRF52811 & nRF52832.

I want the Countinous Modulated  10101010 and 11110000 patterns immediately after Power On, to evaluate the modulation stability in long time,

No problems with wrong length data, cos I want just to measure frequency deviation.

Is it possible to generate Countinous Modulated patterns, not burst patterns like BLE Test Spec ?

 

[ketiljo]

Sorry, that's not possible. Max packet length is 255 bytes before you have to re-start. Even if you fill the address field with the data you want, 0xaa or 0xf0 and turn off CRC, the preamble will be send in the start of the packet. The preamble is always 0x55 or 0xaa 

[masamasa]

Thanks your answer.

It's bad, I'll try evaluation on Transmit Test.

Best Regards.

[ketiljo]

Why is it bad? You can never send packets longer than 255 bytes, so it doesn't make sense to test the modulation on longer packets than this.

[masamasa]

I'll measure radio characteristic, and want to operate the DUT and measure  instrument asynchronously.

So I think it is easy to measure the endless Transmit frequency.