HELI 91
The Fail-Safe/Hold Function is available only when you use the
XP8103 transmitter in either of the PCM modulations — S-PCM
or Z-PCM. This function is designed to help minimize damage to
your airplane during a loss of signal to the receiver. The servos
either assume the fail-safe presets or hold the last good signal
position.
Note: In the PCM modulations, the Fail-Safe/Hold Function
cannot be totally disabled so that the servos will react to
interference in the same way as they do in a PPM system. This is
only possible with the use of a PPM receiver and the transmitter
in the PPM modulation.
Note: Since the actual screen appearance varies, depending on
the modulation of your radio, refer to the appropriate
modulation section which follows (Z-PCM, S-PCM).
As noted earlier, if you are in the PPM modulation, the Fail-
Safe/Hold Function is not applicable. Therefore, the Fail-
Safe/Hold Function will not appear on your LCD in the PPM
mode.
Refer to the Modulation Selection Section for more information
pertaining to the broadcast signal of your XP8103 transmitter.
Accessing the Fail-Safe/Hold Function in Z-PCM Modulation
Hold (Z-PCM)
The Hold Function is automatically activated when the radio is
turned ON and is in the Z-PCM modulation.
This function stops (or holds) the servos in the positions they were
in just prior to the interference. Therefore, your airplane
maintains the position held immediately before the interference
was experienced. When a clear signal is restored, the Hold
Function releases, and control of the airplane returns to you.
1. Place the transmitter power switch in the ON (upper)
position.
2. While the power switch is in the ON position, press the UP
and DN keys simultaneously to access the Function Mode.
3. Press either the UP or DN key until Fail-Safe appears in the
left portion of your LCD.
Note: If Fail-Safe does not appear on your LCD, it is because
you are transmitting in PPM. Fail-Safe is not applicable in the
PPM mode. Refer to the Modulation Mode Selection Section for
more information.
Rate Adjustment
The Rate Adjustment Function found in the Programmable Mix
#3 Function allows you to increase or decrease the amount of
mixing (servo travel) given to the slave channel in either the
high/low, or left/right positions. Adjustment of this value will
only affect the mixing value (output) of the slave channel, and it
has no effect on the servo output value of the master channel.
To adjust the mixing rate, press the SEL key until the cursor is in
line with the “Rate:” as indicated on the LCD display. The arrow
shown to the right of the “Rate:” indicates the position to be
adjusted. This arrow is manipulated only by the control
stick/switch of the selected master channel. Move the control
stick to bring the arrow to the desired point of adjustment.
Note: The arrow will not be displayed on the screen unless the
operational switch selected is in the proper position to activate
the Programmable Mixing Function.
To adjust the rate value, press either the + or - key until the
desired value has been achieved.
Programmable Mixing Offset
Any position of the master channel can be determined as the
basic point (center) of mixing. The basic point is the position of
the master channel stick, control switch, or knob where you set
the mix value and the direction of mixing. To set the basic point
of mixing, press the SEL key until the cursor is in line with the
“offset” as displayed on the LCD screen. Next, move the master
channel control stick to the desired position and press the CLR
(store) key once to store the offset value. The stored offset value
will now be displayed at the bottom of the LCD display.
This offset value is the amount of offset value as determined from
neutral. However, the mixing value at the determined position
will indicate zero.
4.13 Programmable Mixing 1-3 (Function Mode), cont.
4.14 Fail-Safe/Hold
