Sekonic RT-GX User Manual

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Transmitter

This manual is specic for Godox

®

operation.

Please read the "Operating Manual" and "Safety Precaution" so that you will fully understand the

features and operation of this product.

Keep the operating manual in a safe place for future use.

RT-GX

Operating Manual

Table of Contents

Questions and Answers:

A
arroyodonnaJul 28, 2025
How to fix Sekonic Transmitter when flash cannot be triggered?
- N
  Nicole HallJul 29, 2025
  To ensure proper flash triggering in Radio Triggering Flash Mode with your Sekonic Transmitter, verify the following: * Confirm that the radio receiver in your flash is compatible with the meter’s transmitter and that no other non-compatible brands or manufacturers are in use. The transmitter installed on the meter and the receiver being used must utilize the same radio system. * Ensure that the meter transmitter and receiver are set to the same channel number and group. * Verify that the transmitter and receiver are configured with the same Wireless ID. If your receiver (flash) does not have a Wireless ID setting, make sure to select OFF.
L
Lindsey WagnerAug 11, 2025
What to do if Sekonic Transmitter displays “Radio transmitter installed cannot be used in this meter”?
- K
  Kristin HowardAug 11, 2025
  If your Sekonic Transmitter displays the message “Radio transmitter installed cannot be used in this meter,” it indicates that the meter's firmware may be outdated. To resolve this, update the meter to the latest firmware using the Data Transfer Software, which can be downloaded from the Sekonic website.

Sekonic RT-GX Specifications

General

Frequency	2.4 GHz
Compatibility	Godox X System
Channels	32
Groups	16
Power Source	2 x AAA batteries
Type	Radio Transmitter
Range	100 m (328 ft)

Summary

Safety Precautions

Symbol Explanations

Explains the meaning of WARNING, CAUTION, NOTICE, and NOTE symbols.

Product Features and Restrictions

Before Use: Installing the Transmitter

Godox Radio System Operations

System Overview

Setting Radio CH/Group

Instructions for setting radio channels and groups via Tool Box or Measuring screen.

Setting Wireless ID

Radio Triggering Flash Mode

Radio Triggering Multiple (Cumulative) Flash Mode

HSS Flash Radio Triggering Mode

Flash Duration Analysis Mode

Measuring flash duration time, waveform, and adjusting 't' value.

Product Information

Regulatory Compliance

Specifications

Troubleshooting Guide

Common Issues and Solutions

Addresses common operating problems and their suggested solutions.

After-sales Services

Warranty and Repair Information