ImmersionRC | EzUHF R/C Control System
5
As an example: Take the case of a R/C transmitter which uses a 2s LiPo pack. The EzUHF will emit slightly
less power than specified (approx. 25dBm on 8v, vs. around 29dBm on 11.1v) when powered this way.
In most cases this power difference is insignificant, for buzzing around the local flying field, this is a very
reasonable power level.
If full power is desired in this case, a 3s LiPo pack (or equivalent) can safely be connected to the DC
Power jack, providing both higher power, and redundancy (no power will be consumed from the R/C
transmitter’s battery until the external pack is either drained, or removed).
Binding
Each EzUHF Transmitter and receiver must be ‘bound’ together, before they may be used, as is the case
with just about all of the 2.4GHz systems on the market today.
The binding process teaches the receiver several pieces of information:
1)
The transmitter’s unique ID, and therefore its pseudo random hopping sequence
2)
The precise frequency difference between the transmitter and receiver (caused by crystal
tolerance)
3)
The precise frame-rate emitted by the R/C Tx
Note that point 3 does mean that rebinding is required if the EzUHF transmitter is switched between
different R/C transmitters, especially those with different frame rates.
For more advanced binding, see Appendix A: Binding multiple transmitters to a single receiver.
The binding procedure is as follows:
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 re-
attempted.
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.
NOTE: The 10 second limit on the receiver ensures that the receiver can never enter binding mode
accidentally during flight, if its button is accidentally pressed.
