|F1 push button:||channel 2|
|toggle switch:||channel 3|
|F2 push button:||channel 4|
|F3 bind button:||channel 5|
Tx20v2# uses a PP3 9V battery, preferably Alkaline or NiMH / Lithium rechargeable. The maximum working voltage of the internal electronics module is 10V and there is a protection diode wired in series with the battery lead. This allows the battery voltage to be up to 10.7V. If the battery voltage is above this value, the internal regulator will shut down and the transmitter will not operate.To replace the battery:
On / Off Push Button
Tx20v2 has an illuminated push-button latching on/off switch. The LED lights continuously when the transmitter is on and flashes when Tx20v2 is in bind mode (see below). It is best to switch the transmitter on before the receiver. If a receiver is switched on with Tx20v2 off, it is likely to enter bind mode with rapid flashing of the LED on the receiver board. If you did not intend to bind, switch the receiver off, then switch Tx20v2 on followed by the receiver.
Speed / Throttle Knob
Tx20v2 is available with a centre-off or low-off throttle control. The throttle type is actually implemented in the receiver, transmitter difference are the front-panel label and whether there is a centre-click on the throttle.
The 3-way toggle switch is used to select forward/reverse with receivers that have 'low off', full-range motor control. it can be used to control lights instead of direction with receivers that have 'centre off' motor control.
Note: holding the bind button for longer than 20 seconds will result in strange things happening (see Calibration).
If a receiver has not previously been bound, it has to be 'paired' with the transmitter. Binding is only required once per receiver.
The two auxiliary function push buttons F1 and F2 may be used to control lighting, couplers, sound cards, etc.
Tx20v2 can be used to program Deltang Rx4x and Rx6x receivers. You need to refer to the receiver's programming instructions for details of the available functions and the programming sequence to modify the functions.
All of these receivers have a common method of entering programming mode and modifying the programme data. Programming mode is entered by setting the transmitter channel 2 and channel 4 to maximum low or maximum high before applying power to the receiver and then setting both channels back to the middle. Program data is modified by pulsing channel 3 low and stored by pulsing channel 3 high. This corresponds to the following controls on Tx20v2.
|Enter programming mode:||Turn on Tx20 and hold down F1 and F2.
Apply power to the rx and the LED will start rapid flashing.
Release F1 and F2.
The rx LED will now show a 1-flash – this is a repeated single short flash followed by a longer pause. This first flash pattern is called the 'Menu' in the programming instructions.
|Modify programme sequence value:||Pulse the toggle switch down.
The rx LED will briefly show rapid flashing and then the next flash in the sequence – i.e. if it was showing 1-flash it will now show 2-flash. The flash sequence returns to 1-flash when advancing beyond the last value in a sequence. The number of the last value depends on the particular sequence being programmed.
|Store programme sequence value:||Pulse the toggle switch up.
The rx LED will briefly show rapid flashing and then show the currently programmed flash pattern for the next in the sequence.
Repeat the above for each program function that you wish to alter.
For example, to set the ESC output (the first if the receiver has multiple ESC) to respond to full range throttle on channel 1 and direction control on channel 3, the programme sequence is 1,1,2,1,3:
All ready-to-use transmitters are calibrated as the final manufacturing step. This sets the throttle control centre position and normally only needs to be done once. If you suspect that the throttle control is not operating correctly or you have replaced any of the internal components (e.g. throttle potentiometer), your transmitter may need calibration.
If the bind button has been inadvertently held down for longer than 20 seconds, the previously stored calibration data will have been overwritten and you could find that the throttle control behaves strangely.
To perform calibration: