7 To use the Matek 1G3SE with IRC Tramp. You will need to enter the CLI command `set vtx_frequency_group = FREQUENCYGROUP_1G3`. You must also make sure that the initial VTx settings in the configuration tab are in a valid range. They are:
9 - `vtx_channel` between 1 and 8
11 Note: The frequencies required by the US version of the VTx are on `vtx_band` 2 (BAND B) only.
13 ### Team BlackSheep SmartAudio
15 If you have problems getting SmartAudio working. There are a couple of CLI parameters you can try changing to see if they help.
17 - There is a workaround for early AKK VTx modules. This is enabled by default. You could try disabling this setting [`vtx_smartaudio_early_akk_workaround`](https://github.com/iNavFlight/inav/blob/master/docs/Settings.md#vtx_smartaudio_early_akk_workaround) to OFF.
19 - If you are using softserial, you can try using the alternate method by setting [`vtx_smartaudio_alternate_softserial_method`](https://github.com/iNavFlight/inav/blob/master/docs/Settings.md#vtx_smartaudio_alternate_softserial_method) to OFF.
21 - If you are using TBS Sixty9 VTX you may consider to set count of stop bits to 1, using [`set vtx_smartaudio_stopbits = 1`](https://github.com/iNavFlight/inav/blob/master/docs/Settings.md#vtx_smartaudio_stopbits)