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.
18 ##### Matek 1G3SE frequency chart
20 | Band | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
21 |------|------|------|------|------|------|------|------|------|
22 | A | 1080 | 1120 | 1160 | 1200 | 1240 | 1280 | 1320 | 1360 |
23 | B | 1080 | 1120 | 1160 | 1200 | 1258 | 1280 | 1320 | 1360 |
25 ### Team BlackSheep SmartAudio
27 If you have problems getting SmartAudio working. There are a couple of CLI parameters you can try changing to see if they help.
29 - 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.
31 - 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.
33 - 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)