JR Direct Radio XP662 User Manual download pdf (Page 63)

When the Fail-Safe function is activated (i.e., when

the signal is interrupted), the transmitter automatically

moves each servo to a preset position. The position

that each servo assumes is determined by you, as is

the time length of interference that must occur

before servo movement.

After the interference has ceased, control of the

airplane returns immediately to you.

There are three time delays to choose from: 1/3 (0.3)

second, 1/2(0.5) second and 1.0 second. These time

delays are the amount of time it takes, starting the

moment the interference occurs, until the servos

assume their preset positions.

1. Press the SCROLL and INCREASE buttons

simultaneously and hold.

2. Turn on the transmitter to enter the System mode.

3. Press the SCROLL button until “FST” appears on

the screen.

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.

XP662 MANUAL Helicopter

FAIL-SAFE/HOLD FUNCTION IN Z-PCM MODULATION

6.9

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.

If you would prefer your control surfaces to move to

a chosen position during a loss of signal, please refer

to the time delay/memory section below.

Hold (Z-PCM)

Accessing Fail-Safe/Hold (Z-PCM)

The Fail-Safe/Hold function is available only when

you use the XP662 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 XP662 transmitter.

FAIL-SAFE/HOLD

6.8

CHAPTER 6: FUNCTIONS (SYSTEM MODE)

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Helicopter

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JR Direct Radio XP662 User Manual Page 63

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