# Frequency hopping transmit \[FIXED\]

**URL:** <https://discourse.myriadrf.org/t/frequency-hopping-transmit-fixed/3622>\
**Category:** LimeSDR\
**Created:** [8 November 2018 11:44 UTC](https://discourse.myriadrf.org/t/frequency-hopping-transmit-fixed/3622 "2018-11-08T11:44:41Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![KarlL](https://avatars.discourse-cdn.com/v4/letter/k/dfb087/32.png) [@KarlL](https://discourse.myriadrf.org/u/KarlL)\
**Post date:** [13 November 2018 04:35 UTC](https://discourse.myriadrf.org/t/frequency-hopping-transmit-fixed/3622/13 "2018-11-13T04:35:35Z")

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My mistake. It is indeed working well, **thanks a lot**!

For anyone interested I do something like this

```
// Use high level function to sets things right.
device->SetNCOFreq(tx, channel, index, freq);
...

lime::LMS7002M* lms = device->GetLMS();
uint16_t addr = tx ? 0x0240 : 0x0440;

// Use low level functions to directly set the NCO.
uint32_t fcw = uint32_t((otherFreq/ refClk_Hz) * 4294967296);
lms->SPI_write(addr + 2 + index * 2, (fcw>> 16)); // NCO MSB part.
lms->SPI_write(addr + 3 + index * 2, fcw); //NCO LSB part.

```

This allows skipping a lot of costly calls that in my case, **going from 4.4ms to 0.350ms**. That’s an awesome improvement!

I’m only using channel 0, but I would probably need to call something like `lms->Modify_SPI_Reg_bits(LMS7param(MAC), channel);` if I wanted to go from one channel to another.

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_[View the full topic](https://discourse.myriadrf.org/t/frequency-hopping-transmit-fixed/3622)._