Frequency hopping transmit [FIXED]

[KarlL]

@ricardas

quickest way to change would be by using NCO to upconvert or downconvert your frequency by changing SPI register 0x0240[4:1] bits, which allows up to 16 possible jump frequencies. Of course with NCO the available jump range would depend on your sampling rate.
LimeSDR-USB shows that SPI register write/read roundtrip is around 151.794 us, don’t know if there would be any additional delays at hardware level until it takes effect in RF.

Am i right in thinking that setFrequencyComponent with RF will set the radio while with BB it will change the NCO? If yes then what’s the difference with using the SPI registers?

@ricardas

use NCO to upconvert/downconvert your signal. It’s possible to have 16 frequency offests configured in 0x0241:0x0261 registers, and switch between them using 0x0240[4:1] bits.

Do you have more info (eg code sample) on how to use those registers exactly? I guess those are not accessible through Soapy, but only directly through the Lime API.

So I could put up to 16 frequency offsets, and then just switch between them. Now why would that be faster than just changing the value of one of those 16 registers? Is it because there’s some caching involved, and setting one of those 16 registers is time consuming, but then switching is really fast?