Operating Instructions
HFMG3 M-LINK 2.4 GHz RF Module
Page 9
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!
These operating instructions form an integral
part of the product, and contain important infor-
mation and safety notes. Please store them in a
safe place, where you can find them at any time,
and pass them on to the new owner if you ever
dispose of the product.
1.
S
PECIFICATION
HFMG3 M-LINK 2.4 GHz RF module
Order No.
# 4 5616
Frequency range
2.4000 GHz … 2.4835 GHz
Restricted frequency range:
2.4000 GHz … 2.4540 GHz
Transmission type
2.4 GHz FHSS M-LINK system
Frequency Hopping Spread Spectrum
MULTIPLEX-LINK
Output power
100 mW EIRP
Current drain
approx. 50 mA
Temperature range
- 15°C … + 55°C
Dimensions, RF
module case
(L x W x H)
approx. 63.6 x 51.5 / 48.7 x 31.8 mm
(excl. 2.4 GHz aerial unit)
Weight
44 g
(RF module including
2.4 GHz aerial unit)
2.
S
AFETY NOTES
!
Please read the instructions before using the product.
!
Use the unit only for the intended applications (
Î
3.).
!
Do not make any modifications of a technical nature to
the RF module.
If any component should be damaged, always have it
checked by a MULTIPLEX Service Centre.
!
Do not touch any components on the RF module when
inserting or removing it.
!
When the RF module is not installed in a transmitter,
protect it from mechanical load (vibration, shock,
distortion, …) and damp.
3.
A
PPLICATION
/ C
OMPATIBILITY
The
2.4 GHz HFMG3 M-LINK RF module
is approved exclu-
sively for use in the following Graupner/JR transmitters:
x
Graupner mx-22
.
x
Graupner mx-22s
.
x
Graupner mx-24
.
x
Graupner mx-24s
.
x
RF module compatible JR transmitters
.
4.
S
PECIAL CHARACTERISTICS
x
Simple
installation:
The cased 2.4 GHz plug-in module with integral 2.4 GHz
aerial is inserted in the rear of the transmitter from the out-
side, in place of the previous xx MHz RF module.
x
Integral
buzzer:
If a telemetry-capable M-LINK receiver is used, the transmit-
ter emits an audible warning when the receiver battery voltage
falls to a dangerous level.
x
Extended
operating
time:
The current drain of the 2.4 GHz RF module is low.
x
SET / LED button on the outside of the RF module:
For status display, binding and range-checking; externally
accessible, on the module itself.
x
It is possible to switch between xx MHz and 2.4 GHz M-LINK
technology at any time in a matter of seconds when neces-
sary.
x
Prepared for use with the MULTIPLEX Telemetry-Display
(
# 4 5182
):
If the system includes a telemetry-capable receiver and
external sensors, up to sixteen telemetry values can be
generated and shown on the Telemetry-Display, including
visual and audible warnings.
x
Switchable between 14 ms servo frame rate (Fast Response)
and 21 ms; can also be switched between maximum and
restricted frequency range (France mode).
x
Update-capable:
The
2.4 GHz HFMG3 M-LINK RF module
can be updated at
any time using the MULTIPLEX Launcher PC program, and
is therefore future-proof. MULTIPLEX Launcher is available
as a free download from www.multiplex-rc.de. To carry out
an update you also require the UNI USB PC lead (
# 8 5149
).
5.
C
OUNTRY
-
SPECIFIC RESTRICTIONS
!
Legal note: transmitting apparatus must only be set up
and operated on frequencies / transmission channels which
are approved for the country in which it is to be used.
!
Important: in particular countries the module may only
be used within a restricted frequency range.
In certain countries the operation of 2.4 GHz RC systems with
an output power of 100 mW EIRP is only permitted within a
restricted frequency range. For this reason the
HFMG3 M-LINK
2.4 GHz RF module
offers the option of limiting the frequency
range (
Î
17.
).
You can find an overview of the countries affected by this
restriction in the separate sheet entitled “Operating the 2.4 GHz
M-LINK System with Restricted Frequency Range”.
6.
T
HE
M-LINK
TRANSMISSION SYSTEM
M-LINK is a transmission system designed by MULTIPLEX. It
operates on the 2.4 GHz ISM band, and exploits modern FHSS
technology (FHSS = Frequency Hopping Spread Spectrum).
Automatic RF channel management:
With this system it is no longer necessary for the operator to
select the RF channel manually (plug-in crystals, Synthesizer).
2.4 GHz Spread Spectrum systems automatically divide up the
frequency spectrum, and this eliminates the need for conven-
tional frequency monitoring. Same-channel interference (as is
possible on the 35, 40, … MHz band) is virtually impossible. The
first time the system is used you just have to carry out a simple
binding procedure to link the transmitter to the receiver. From
this moment on the receiver only responds to the signals from
your specific transmitter.
FHSS technology:
The transmitter and receiver jump from channel to channel every
few milliseconds, maintaining the same rhythm; the data is
transmitted during a fraction of this period. The resultant brief
period of channel occupation minimises signal conflicts, and
suppresses interference. Even if data packets are lost on par-
ticular channels, the constant high-speed hopping to the next
channel makes any interruptions unnoticeable to the pilot.
