Sorry, here's the location for 3.13. In this case it's a log2 number again,
so 8 means 256 words deep, 9 means 512 words deep, etc.

https://github.com/EttusResearch/fpga/blob/UHD-3.13/usrp3/lib/radio/noc_block_radio_core.v#L60

Wade


On Tue, Jun 7, 2022 at 10:28 AM Marcus D. Leech <patchvonbr...@gmail.com>
wrote:

> On 2022-06-07 11:24, ri28...@mit.edu wrote:
>
> Wade Fife wrote:
>
> I'm not very familiar with how those tune commands get translated into
> register transactions, but one thought I had is that it may also be issuing
> timed commands to the radio. If so, you also might need to make the radio's
> control FIFO deeper by updating the "512" number to the depth you need. It
> should be a power of 2, so I would try 1024 or 2048, etc. It needs to be
> updated in two places to the same value:
>
>
> https://github.com/EttusResearch/uhd/blob/5333d3d12ffc21229ec4203a9ea1c7f68d82e57f/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_radio/noc_shell_radio.v#L148
>
>
> https://github.com/EttusResearch/uhd/blob/5333d3d12ffc21229ec4203a9ea1c7f68d82e57f/fpga/usrp3/lib/rfnoc/blocks/rfnoc_block_radio/noc_shell_radio.v#L195
>
> Wade
>
> I’m using UHD 3.13 because I work in an airgapped environment and I
> haven’t had time to upgrade. It appears noc_shell_radio.v was added around
> UHD 4.0, is there a 3.0 equivalent?
>
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>
> The other thing to consider is that once the RF synthesizer is on
> frequency, if you set the rf_freq_policy to NONE, that will prevent it from
> touching the synthesizer tuning at all.
>
>
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