The Best Diversity Module for FatShark?…

We set out to create the best diversity module that the Fat Shark module bay would ever see. Early feedback hints that we might just have achieved that.

Not ‘just’ a diversity module, but a module that has intimate knowledge of analog video signals. A module that can repair the damage caused as the 5.8GHz analog signal bounces around the environment.

The rapidFIRE module fuses images together, predicts noise before it is visible, rebuilds analog signals to avoid tearing, rolling, and dropped DVR frames, all with zero added latency.

This is more than Analog, but not Digital, so we called it ‘Analog Plus’.

Maximum Goggle Compatibility…

Working closely with FatShark we have ensured maximum compatibility with a wide range of goggles, ranging from Attitudes, through the latest Dominator HDO.

The module senses supply voltage and automatically adapts to headsets which cannot supply enough power through the module bay.

For Attitudes, and the Dominator HDO, the bay provides enough power for the module, and is truly plug-and-play.

This Makes FPV Fun Again…

The exact words uttered by the owner of FatShark when trying the first prototype rapidFIRE module.

Flying around the factory used to be a multipathing maze, but with rapidFIRE the goggle image is on a different level.

For indoor flight, the rapidFIRE algorithms do their best to keep interference from your eyes. For long-range flight, the algorithm adapts to favor patch antennas with narrow beams.

Intuitive, Fluid User Interface…

A bright OLED display, coupled with a 5-position joystick, ensures a friendly, simple user experience.

The goggle channel buttons can be used to change channel as well, ensuring that the user interface is child’s play for anyone who has used any of the stock goggle modules.

The OLED is backed by an on-screen display which shows critical parameters.

Unique Favorites Mode with Tuner…

In addition to supporting the most popular FPV channel sets, the rapidFIRE module has an easy to use ‘favorites band’ (we call it ‘Band X’) with a unique tuning feature.

A narrow-band live spectrum shows the transmission from the transmitter, and allows the channels to be tuned with 1MHz resolution. For long range flight where subtle differences between Tx and Rx frequency can cost valuable range this is a must-have.

For race events, enter the channels used by the event and simply switch between them using the goggle channel buttons.

Single Rx Modes for High Gain Long Range…

When flying 10km out fusing together a high gain, directional antenna, with an omni-directional antenna doesn’t help much. rapidFIRE is ready for this, with power-saving single-receiver modes, easily selected on the user-interface.

These modes still have all of the ‘Analog Plus’ signal regeneration features enabled, but don’t waste power on a second receiver.

Want to put two high gain antennas on the receiver and take advantage of all rapidFIRE features while blasting down a mountain ravine; no problem. We support that also.

Band Scanner…

Quickly scan all common 5.8GHz bands for powered-up transmitters. A couple of clicks of the joystick and the channel is selected.

Click and hold the joystick from the main screen for quick access to the scanner without the need to traverse the menu.

Model Finder…

A dive down the wrong side of the island, an unexpected piece of scraggle in the basement of a bando, an over-excited buddy powering up on the same channel. Just some of the ways that FPV models are lost.

The rapidFIRE module includes a model finder that uses both visual, and audible feedback to help find lost models.

* v1.1.7 and later 


Essential Specs, User Manuals, Firmware & Downloads


Release Date: May 2018
Price: $149 USD for the module, $169 for the module with antenna bundle
Coolness Factor: Extreme!
Compatibility: All Dominator(tm) LCD goggles, including V1, V2, V3, SE, HD1, HD2, HD3, HDO. Plus Attitude V3, V4
Accessories Included: Module doors for Dominator and Attitude, Aux power PCB for Headtracker slot, and flat flex cable.
Sensitivity: Better than -96dBm
Power: 5V @ ~350mA
Alarms: Internal beeper to warn of marginal reception
Modes: rapidFIRE, Classic Diversity, or Upper/Lower Rx options (single Rx modes increase battery life)
The secret stuff… : Cool hidden feature to be announced



No downloads found.


Initial Release

Improve calibration accuracy

Work on low power issue, delay low power check code to skip startup voltage drops with certain battery packs.
Add rapidFIRE #2 mode to support cameras and other hardware that violates PAL/NTSC specs.

v1.1.0  + v1.0.2
More work on low power issue
Module calibration improvements

More work on low power issue, enable live voltage readout in the status menu

v1.1.3 + v1.0.4
Add PAL/NTSC osd mode to support events/leagues who need to know which mode a camera is in. Wider tolerance for cameras with unstable quartz oscillators

Improved joystick code

Add band scanner
Add RSSI Lite mode, with optional OSD readout position (incl. optimized HDO, HD2 modes)
Add basic model finder

Refine model finder, add audible feedback

Add in-goggle OSD with current band/channel, frequency, and RSSI during channel changes.

Fixed mismatch between actual frequency, and OSD frequency.
Add presets for favorites for IMD6, etc.

Slight tweak in sync timing.
Add support for SPI mode for integration of rapidFIRE into groundstations.

Mirror the OLED menu into in-goggle OSD.
Fix occasional video issues in upper-rx only mode.
Fixed in-OSD RSSI bar for lower-rx only mode.

Fix missing lock/unlock tones.
Add channel lock feature.
Add ability to change sync-lock time.

Added long range OSD mode and audible feedback for twin high gain antenna use.
Added ‘yaw stuff’ unique ID to OSD modes.

Very minor changes to the SPI interface for system integrators (ORQA, Groundstation Support, etc).
(no need to upgrade unless you are using the SPI interface).

Added HDO2 setting to the OSD position control to correctly align with the top of the display.
(credits to Lee Schofield for finding this)

Removed Sync Lock setting, defaults to short, eliminating rolling even with marginal systems

Support options for rapidFIRE are the following:

a) Self Help: Please refer to the following document which contains answers to frequently asked questions about the rapidFIRE modules.

rapidFIRE Frequently Asked Questions

b) Retailer Support: Each ImmersionRC reseller must provide first level support for our products. Please contact them first in the event of any issues with your product.

c) ImmersionRC Support Centers: As a last resort, please contact our support centers. Turnaround time is typically 48 hours.
For product repairs, we have physical repair centers in the USA, and UK (for EU customers).
An email to starts the process.

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