Fail-Safe/Hold
The Fail-Safe/Hold feature is available only when you use the
transmitter in either of the PCM modulations — SPCM or
ZPCM. These features are designed to help minimize the damage
to your airplane during a loss of signal to the receiver. The servos
either assume the fail-safe presets or hold their last good signal
position.
Accessing and Utilizing the Fail-Safe/Hold Feature
To access the Fail-Safe/Hold functions, enter Code 77 at the code
number access selection or use the direct mode method.
Note: Since the actual screen appearance varies, depending on
the modulation of your radio, refer to the appropriate modulation
section that follows.
PPM
As noted earlier, if you are in the PPM modulation, the Fail-
Safe/Hold functions are not applicable. The screen will appear as
follows:
ZPCM Fail-Safe/Hold
The initial screen will appear as follows:
Hold (Z PCM)
The Hold function is automatically activated when the radio is
turned on and is in the ZPCM modulation.
This feature stops (or holds) the servos in the positions they were
in just prior to the interference. Therefore, your airplane main-
tains 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.
Fail-Safe (Z PCM)
Note: Fail-safe should always be set when the airplane engine
is not running.
When the Fail-Safe function is activated (i.e., the signal is inter-
rupted), the receiver automatically moves each servo to a preset
position. The position that each servo assumes is determined by
you, as is the time length of the interference that must occur
before servos move to their preset position.
After the interference has ceased, control of the airplane returns
immediately to you.
There are three time delays to choose from: .25 sec, 0.5 sec, and
1.0 sec. These time delays are the amount of time it takes, starting
the moment the interference occurs, until the servos assume their
preset positions.
To select the preset servo positions and the time delay, access
Code 77, as instructed earlier. From the Hold screen, simply
touch the SEL key. The display will change to read as follows:
The first time delay that appears is the .25 second delay. If you
want to select the 0.5 second delay, simply touch the SEL key one
time. If you desire a 1.0 second delay before the servos assume
their preset positions, touch the SEL key one more time—i.e.,
two times from the .25 second display.
To enter the preset servo positions you want, simply hold the
sticks in the positions you want the servos to assume during sig-
nal loss conditions. You can determine fail-safe preset positions
for the other channels of your airplane by placing the potentiome-
ters and switch in the positions that you want them to assume
10X MANUAL Airplane
55
8.20
Code 77
Indicates program
being accessed
Indicates model
number for which
function is being
accessed
Indicates that the
FAIL-
SAFE/HOLD
feature is void
due to the
PPM
modulation
Touch
to exit program
Indicates program
being accessed
Indicates model
number for which
function is being
accessed
Touch to select
another delay time:
once for 0.5 sec.,
twice for 1.0 sec., or
three times to return
to hold
Touch to memorize preset servo positions
(NOTE: When is touched, an
audible “beep” will sound and “SET” will
flash momentarily above the key)
Touch
to exit program
Indicates program
being accessed
Indicates model
number for which
function is being
accessed
Indicates that, should
interference occur, the
servos would hold their last
position prior to the
interference
Touch to activate the
FAIL-SAFE
preset memories
