Multiplex HFMG3 M-LINK Notice D'utilisation page 10

Good data security / Transmission security:
The enormous bandwidth available on 2.4 GHz makes it pos-
sible to transmit much greater quantities of data than is possible,
for example on the 35 MHz band (bandwidth on 2.4 GHz =
83.5 MHz; on 35 MHz = 1 MHz). Digital modulation in conjunction
with sophisticated error-checking in the receiver guarantee out-
standing data quality.
Good resistance to interference:
Typical interference sources in the model, such as electric
motors, and electronic devices such as speed controllers, petrol
engine ignition systems etc., have an interference spectrum
whose maximum frequency is significantly below the 2.4 GHz
range. It is virtually impossible for 2.4 GHz systems to suffer
interference from such sources, and this provides a further im-
provement in security.
Fast, accurate transmission:
MULTIPLEX M-LINK is a digital transmission system offering a
maximum of sixteen servo channels with a resolution of 12 bits
(3872 steps). Background noise has no effect on servo signal
accuracy right up to the limits of range. Resolution, centring
precision and with it general accuracy of control are at a con-
stant high level up to the effective limits of range. M-LINK's
digital encoding allows both HOLD and FAIL-SAFE to operate
very accurately. The servo pulse rate of 21 ms can be reduced to
14 ms (12-channel mode - Fast Response).
Feedback capability / Telemetry:
The 2.4 GHz ISM band offers the possibility of transmitting data
from the model back to the transmitter. If you use a telemetry-
capable receiver, the transmitter emits an audible signal to warn
you when the receiver battery is almost flat.
If you also install the MULTIPLEX Telemetry-Display (# 4 5182),
the screen shows you the connection quality (LQI = Link Quality
Indication) in addition to the actual voltage of the receiver power
supply.
The Telemetry-Display can also output additional telemetry data,
such as current, voltage, altitude or speed values - depending
on the sensors connected to the system.
The Telemetry-Display is capable of displaying a maximum of
sixteen telemetry values.
Visual and audible warnings are generated via the Telemetry-
Display; the warning sounds are produced either by an integral
loudspeaker with volume control, or by an earpiece, which is an
optional accessory. The same applies to the Vario sound output.
Short transmitter aerial:
The short 2.4 GHz transmitter aerial is robust, easy to handle,
and does not impinge on the pilot's field of vision.
Operating Instructions
HFMG3 M-LINK 2.4 GHz RF Module
7.
! Note: the following section describes the method of
installing the 2.4 GHz HFMG3 M-LINK RF module in a
Graupner mx-24s transmitter.
If you wish to use the RF module in a Graupner mx-22,
mx-22s or mx-24 transmitter, or in an RF module compa-
tible JR transmitter, you can still follow the same basic
procedure.
7.1. Remove the transmitter aerial (35, 40, ... MHz aerial)
1. Switch the transmitter OFF.
2. Unscrew the transmitter aerial.
3. Store the aerial in a safe place.
7.2. Removing the installed 35, 40, ... MHz RF module
1. Lay the transmitter face-down on a soft surface. Ensure that
2. The RF module is plugged into the rear face of the trans-
3. Store the removed RF module in a safe place.
7.3. Inserting the 2.4 GHz RF module
1. Set the aerial of the HFMG3 M-LINK 2.4 GHz RF module
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I HFMG3 M-LINK
NSTALLING THE
2.4 GH RF
Z MODULE
the sticks, switches etc. are not damaged.
mitter. Squeeze together the two retaining clips of the RF
module, then cautiously withdraw the RF module, pulling it
up and out of the recess.
! Tip: if the RF module is a tight fit in the RF module
recess, the best method of removing it is to slip your finger-
nails into the space between the retaining clips and the RF
module well, then squeeze the retaining clips together, and
finally push the RF module up and out.
! Tip:
If the RF module is an extremely tight fit in its mounting,
move the module gently and carefully to left and right whilst
you pull it out and up.
straight..
Slip the aerial of the HFMG3 M-LINK 2.4 GHz RF module
under the transmitter transport handle.
The 2.4 GHz RF module can now be inserted in the RF mo-
dule recess by pressing down on the top of the RF module,
working carefully and steadily.