RADIO SETUP setting items explanation

This section describes the setting items on the RADIO SETUP screen of OpenTX / EdgeTX radio. The screen design differs between the monochrome display model and the color display model, but the items that can be set are almost the same.
The value in "Initial value" column is initial value for Jumper T12 Pro (OpenTX Version 2.3.4 2019-12-27 17:12:20).

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Date / time / battery voltage range

Date / time / battery voltage range
menu	function	Initial value
Date	Set today's date. This information is used when collecting logs. Log collection settings are made in "SD Logs" action in Special Functions/Global Functions .	2000-05-26
Time	Set the current time. This information is used when collecting logs. Log collection settings are made in "SD Logs" action in Special Functions/Global Functions .	00:00:00
Batt.range (Battery meter range)	Set the battery voltage range. Set the minimum and maximum battery voltage. This information is used to display the battery level on the main screen. For 2s LiPo battery or two 18650 / 18350 type batteries, 6.6-8.4 is fine. For color display models, this item is located on [HARDWARE] screen.	6.0-8.0

Sound menu

Sound menu
menu	function	Initial value
Mode	Specifies how to play sound. [All]: Play all sounds. [NoKey]: Play with all but key operations. [Alarm]: Only play warning sound. [Quiet]: No sound.	NoKey
Volume	Specify master volume. Specifies maximum volume of Beep, Wav, and Bg sound specified below.	(center)
Beep Volume	Specifies volume of beep sound.	(center)
Beep Length	Specifies beep ringing time.	(center)
Beep Pitch	Specifies pitch of beep. Specify by adding frequency to the base value. It can be specified in 15Hz units and can be set in the range of 0 to + 300Hz.	+0Hz
Wav Volume	Specifies volume of Wav sound (talking voice). Wav sound play settings are made in "Play Track" action in Special Functions/Global Functions .	(about 90%)
Bg Volume (Background Volume)	Specify volume of BGM. BGM play settings are made in "Background Music" action in Special Functions/Global Functions .	(about 75%)

Variometer menu

Here, specify how to play warning sound when aircraft has a Variometer that detects its ascent and descent. Variometers are used in radio-controlled gliders mainly.

Variometer menu
menu	function	Initial value
Volume	Specifies volume of Variometer alert sound.	(center)
Pitch zero	Pitch (Hz) of beep that is played when vertical velocity is between Sink Min and Climb Min (Center) defined on TELEMETRY screen . It can be set in the range of 300Hz to 1100Hz.	700Hz
Pitch max	Pitch at maximum vertical velocity defined by Climb Max (Range Max) on TELEMETRY screen . It can be set in the range of 700Hz to 2900Hz. As the rate of increase increases, the beep frequency increases linearly from the value specified in [Pitch zero] to the maximum value specified here. This maximum value must be greater than value specified by [Pitch zero].	1700Hz
Repeat zero	Specifies beep ringing interval in milliseconds. It can be specified in the range of 200 (5 beeps / sec) to 1000 (1 beep / sec).	500ms

Haptic menu

Haptic menu
menu	function	Initial value
Mode	Specify how to vibrate radio. [All]: Vibrates when all sounds are played. [NoKey]: Vibrates with everything except key operation. [Alarm]: Only warning sound vibrates. [Quiet]: Does not vibrate.	NoKey
Length	Specifies length of vibration.	(center)
Strength	Specifies strength of vibration.	(center)

Contrast menu

Contrast menu
menu	function	Initial value
Contrast	Specifies screen contrast. Specify in the range of 10 to 30.	20

Alarms menu

Alarms menu
menu	function	Initial value
Battery Low	Specifies alarm sound when battery of radio is low. Alarm sounds when voltage drops to the value specified here.	6.5V
Inactivity	Specifies an alarm when radio is not operated for a long time. If you do not operate for the time (in minutes) specified here, the alarm will sound. If you specify zero, alarm will not sound.	10 minutes
Memory Low	Specifies whether to sound an alarm when memory becomes insufficient when using LUA script.	ON
Sound Off	Specifies whether or not to sound an alarm when all sounds are set to off (Mode is Quiet in the Sound menu) when turning on the radio power.	OFF
RSSI Shutdown (Check RSSI on shutdown)	Specifies whether to sound an alarm when receiving RSSI (Receiver Signal Strength Indicator) from the aircraft when turning off the radio power.	ON

Backlight settings

Backlight settings
menu	function	Initial value
Mode	Specify conditions for turning on backlight. [OFF]: Always turns off. [Keys]: Lights when you push any of screen operation keys. [Ctrl]: Lights when sticks or switches is operated. [Both]: Lights when screen operation key, sticks or switches is operated. [ON]: Always lit.	Both
Duration	Specify lighting time of backlight in "seconds".	10 seconds
Brightness	Specify brightness of backlight in the range of 0 to 100.	100
ON Brightness	Specify brightness in the range of 0 to 100 when the backlight is on.	100
OFF Brightness	Specify brightness in the range of 0 to 100 when the backlight is off.	100
Alarm	Specifies whether to turn on backlight when an alarm occurs.	OFF

Power saving setting

If you set radio backlight to a darker setting than usual, you can prevent power consumption. To do so, set the "Mode" field to "Both", the "Duration" field to "10s", the "ON brightness" field to about 10%, and the "OFF brightness" field to about 1%.

Various time settings

Various time settings
menu	function	Initial value
Splash Screen	Specify time to display startup screen (OpenTX/EdgeTX logo screen in Initial value) in "seconds".	4 seconds
Pwr On delay	Specifies long press time of power button required to turn on power of radio. It can be specified in 0 to 3 seconds. If you specify 0 seconds, it will start instantly when you push power button.	2 seconds
Pwr Off delay	Specifies long press time of power button required to turn off power of radio. It can be specified in 0 to 3 seconds. If you specify 0 seconds, it will stop instantly when you push power button.	2 seconds

GPS settings

GPS settings
menu	function	Initial value
Time zone	For radios equipped with GPS receivers, specify time zone required to use GPS by difference (integer from -12 to 12) from UTC (Coordinated Universal Time).	0
Adjust RTC	For radios equipped with GPS receivers, specify whether to correct clock of radio with information received from GPS satellites.	OFF
GPS Coords	For radios equipped with GPS receivers, specify GPS coordinate display format. [DMS]: Displayed in Degree Minutes Second. [NMEA]: Displayed in minutes by degrees and decimal points (NMEA: National Marine Electronics Association format)	DMS

Various environment settings

Various environment settings
menu	function	Initial value
Owner ID	Custom registration ID required when using FrSky ACCESS ISRM(internal RF) modules.	99KRVP-
Country code	Select region where you want to use the radio from US (USA), JP (Japan), and EU (Europe). This information is used to make built-in transmitter module comply with local radio regulations.	US
Voice language	Select language of audio to play with alarms, etc. Specify which folder to use under "SOUNDS" folder on microSD card.	English
Units	Select unit used for telemetry display from Metric or Imperial.	Metric
Play delay (sw. mid pos)	Specifies time, in milliseconds, before playing audio assigned to center of three-position switch. If this is too short, the audio in center position will also be played when three position switch is switched from end to end.	150msec
USB Mode	Specify the behavior when the radio is turned on and connected to a computer with a USB cable. [Joystick]: Operates as a "USB joystick (HID device)". [Storage]: Acts as a "USB storage device". From PC, you can access microSD card built into radio and EEPROM that stores model information. [Serial]: Connect with VCP (virtual COM port). Connect with the radio's CPU (STM32 microprocessor) via COM port. [Ask]: Screen will give you a choice of which mode to work with.	Ask
Rotary Encoder Mode	Specifies the direction of scroll wheel rotation. Normally, select [Normal], and select [Inverted] when you want to invert.	Normal

Various channel settings

Various channel settings
menu	function	Initial value
RX channel ord (Default channel order)	When creating a new model, specify order in which Aileron, Elevator, Throttle, and Rudder are assigned to virtual channels 1 to 4 on INPUTS screen . You don't have to worry too much about this setting as you can freely change assignment to physical channel on MIXES screen . Also, changing this will not affect models that have already been created.	AETR
Mode	Select stick assignment, from 1 to 4. It seems that mode 2 is often used by drone pilots and RC users in the United States, and mode 1 is often used by RC users in Europe and Japan. Drone products and instructions are based on Mode 2. If you are just starting out, we recommend practicing in mode 2. When switching here, it is also necessary to change setting or swap the left and right sticks (gimbals).	1 or 2 (Select at the time of purchase)