> For the complete documentation index, see [llms.txt](https://docs.flightsim-studio.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.flightsim-studio.com/e-jet-series/mcdu-guide/radio.md).

# RADIO

Press **RADIO**. This is the default page after power-up.

## RADIO 1

* **COM 1 / COM 2** — active and preset. Empty LSK on a COM line swaps active/preset or opens the COM detail page (squelch, 8.33 / 25 kHz, memory).
* **NAV 1 / NAV 2** — frequency and course. Detail page includes **DME HOLD** and **FMS AUTO** (autotune).
* **XPDR** — squawk, STBY / TA-RA, IDENT.

## RADIO 2

**PREV / NEXT** from RADIO 1. ADF / HF / COM-NAV 3 layout.

## TCAS / XPDR

From the transponder line, **TCAS/XPDR** pages set codes, flight ID, XPDR 1/2, ADS-B, and IDENT.

ILS autotune and preview (when an ILS is in the FMS arrival) are described in the [Procedure Guide](/e-jet-series/normal-procedures/procedure-guide.md).