Page Comparison

Product Links

Receiver: 

http://www.immersionrc.com/fpv-products/ezuhf-8-channel-diversity-receiver/

https://hobbyking.com/en_us/immersionrc-ezuhf-8-channel-diversity-receiver.html

JR Transmitter: 

http://www.immersionrc.com/fpv-products/ezuhf-jr-module/

https://hobbyking.com/en_us/ezuhf-433mhz-direct-fit-jr-module-for-the-9xr-and-taranis-uhf.html

Regular Transmitter: 

http://www.immersionrc.com/fpv-products/ezuhf-500mw-transmitter/

https://hobbyking.com/en_us/immersionrc-ezuhf-transmitter-600mw.html

Firmware

To configure both the TX and RX modules, hook them up via the usb cable to your computer. You'll need to use the ImmersionRCTools configuration utility, which also has the ability to flash the modules with the latest firmwares.

ImmersionRCToolsSetup_v1.42.5.zip

The currently loaded firmware on all the modules is v1.53. This can be downloaded below:

EzUHFFirmware_v1.53.zip

Binding Procedure

1. Connect suitable antennas to both the EzUHF Tx, and Rx and place them within 1m of each other
2. Connect the EzUHF Tx to the R/C Transmitter, switch to low power mode, hold down the pushbutton, and turn on the radio.
3. As soon as a periodic beeping starts, let go of the button.
4. Apply power to the receiver, and within 10 seconds, hold down the binding button on the receiver. After < 1 second the LED should extinguish, and shortly after, it should flash 3 times, indicating binding success. 
   • If instead, the LED flashes 6, or 10 times, quite quickly, then binding failed, and must be reattempted. 
   • NOTE: The Bind switch on the 8 channel ‘dual board’ receiver is accessed between the two boards, from the hole beside the servo connectors (it is not hidden under the ‘BIND’ text on the label).
5. Power down the Tx, and Rx. Binding is complete.

Fail-safe

The system DOES NOT SUPPORT disabling PPM and PWM outputs as a fail safe. This means the disconnect detection methods that the picpilot uses will not work when using this radio system. Therefore its not 

recommended to use it during flight tests, although it can be used for development purposes.

To set the failsafe:

1. With the plane on the ground, and servo positions neutral, throttle cut, hold down the transmitter’s bind/failsafe button until the transmitter beeps. This will set a reasonable default failsafe ready for the first flight
2. With the plane in flight, set the controls in a suitable position for the failsafe, and re-program the failsafe. In most cases, ‘suitable position’ means throttle cut, and a gentle turn radius, to let the plane circle gently until it lands, but of course every application is a little different.

Resources

PPM Oscilloscope Results:

Frequency: 45Hz

Sync Pulse: ~9.2ms

Channel Gap: 300us

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