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Operating Instructions for RX-7-DR M-LINK /
RX-9-DR M-LINK 2.4 GHz receivers
MULTIPLEX Modellsport GmbH & Co.KG • Westliche Gewerbestraße 1 • D-75015 Bretten (Gölshausen) • www.multiplex-rc.de Page 5/6
Ins
tr
uc
tions
for
R
X
-7
/9-
D
R
M-
LIN
K
2.
4 G
H
z r
e
ce
iv
er
s # 985 531
9 (
10-
02-
24/M
IW
A
) •
E
rr
o
rs
and om
is
si
ons
ex
cepted! •
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MU
LT
IP
LE
X
11. MULTI
MATE AND
RX D
ATA
M
ANAGER
PC P
ROGRAM
All MULTIPLEX M-LINK receivers are based on modern micro-
controllers (FLASH technology). In the case of most M-LINK
receiver types (see the operating instructions supplied with your
receiver) it is also possible to connect the unit to the
MULTImate
(
# 8 2094
) and / or to a PC or notebook computer using the PC
connecting lead (
# 8 5149
); the PC program
RX DataManager
can then be used.
The PC program
RX DataManager
is available as a free down-
load from the MULTIPLEX website (www.multiplex-rc.de). This
program or
MULTImate
opens up the following possibilities:
x
Availability of expanded receiver options, such as freely
variable HOLD and FAIL-SAFE period, individual FAIL-SAFE
settings can be activated and adjusted channel by channel,
…
x
Error counter / error memory read-out
The error count can be read out separately for signal errors
and operating voltage errors.
x
Unrestricted sensor address assignment for the receiver
battery voltage and for connection quality (0 - 15).
x
Receiver name assignment (max. 12 characters).
The
RX DataManager
program also allows:
x
Firmware
update.
12. I
NSTALLATION
N
OTES
x
Protect your receiver from vibration, especially in models
powered by an internal-combustion engine (e.g. pack it loosely
in foam).
x
Locate the receiver at least 150 mm away from electric mo-
tors, petrol engine ignition systems and any other electronic
components such as speed controllers for electric motors and
drive batteries. Do not route the aerials close to these compo-
nents.
x
Install the receiver in the model in such a way that both
aerials are as far away as possible from electrically conduc-
tive materials, and are arranged at an included angle of 90°.
Locate the two aerial ends as far from each other as possible.
x
If the model’s fuselage contains conductive material (e.g.
carbon fibre), the aerials must be installed in such a way that
the active part of the aerial (approximately the last 30 mm) is
located outside the model.
x
Do not deploy the receiver aerials inside or on model com-
ponents which are laminated or reinforced with electrically
conductive materials (metal foil, carbon fibre, metallic paints
etc.), as they have a shielding effect.
x
Never shorten or extend the aerials or their feed cables.
Never attempt to exchange the aerials yourself!
x
Do not deploy the aerials parallel to servo leads, high-current
cables or electrically conductive parts (e.g. pushrods).
x
Keep to the recommended installed arrangements (
Î
18.
,
sketches A - D)!
x
High-current cables, e.g. those attached to the speed con-
troller, motor and flight battery, should be kept as short as
possible.
x
If you are using a diode-based battery backer, always install a
PeakFilter (
# 8 5180
).
x
Reception quality can be optimised by fitting a special ferrite
ring (
# 8 5146
) or suppressor filter lead (
# 8 5057
) in the speed
controller cable. It is also advisable to fit effective suppressors
to conventional (brushed) electric motors (not brushless types)
(e.g. use the suppressor set
# 8 5020
).
13. R
ANGE
C
HECKING
Regular range checks are very important - even when using a
2.4 GHz system - in order to ensure reliable operation of the
radio control system, and to enable you to detect sources of
interference in good time. This applies in particular:
x
Before the use of new or changed components, or existing
components in a new or modified arrangement.
x
Before re-using radio control system components which were
previously involved in a crash or a hard landing.
x
If you have encountered problems on a previous flight.
Important:
x
Always ask a second person to help you with your range
check, so that one of you can secure and observe the model.
x
If possible, carry out the range check when no other trans-
mitters are operating.
Carrying out the range check:
1. Select “range-check mode” on your transmitter (see the
operating instructions supplied with the transmitter or RF
module).
There must be visual contact between the transmitter and
receiver aerials (i.e. the model) during the range check.
Keep the transmitter and the model about one metre above
ground during the range check.
2. When checked with reduced transmitter power, the range of the
RX-7/9-DR M-LINK
receiver must be 100 metres. You have
reached the range limit when the servos start to move jerkily.
If your transmitter features an automatic servo test facility,
we recommend that you activate it for one control function
(e.g. rudder). This sets up a steady movement of the servo,
and enables you to detect the limit of range clearly.
Important:
Carry out the first range check with the motor switched off.
Turn the model into all attitudes, and attempt to optimise
reception by changing the position of the two aerials.
For the second range check, run the motor at varying speeds
and check that the effective range is not significantly reduced.
If there is a marked reduction, locate and eliminate the cause
of the interference (caused by the motor, the arrangement of
the receiving system and power supply, vibration, etc.).
14. E
XCHANGING THE
A
ERIALS
The standard aerial feed cables attached to
RX-7/9-DR M-LINK
receiver types are long enough for most applications.
If you require longer or shorter aerial feed cables, please contact
the MULTIPLEX Service Department or any MULTIPLEX Ser-
vice Centre, as they stock cables of different lengths, and will
gladly quote an individual price for modifying your receiver to
professional standards.
!
Caution: never attempt to exchange the aerials yourself!
Changing the aerials to a professional standard requires
special tools as well as appropriate expertise. Ignoring this
warning may have an adverse effect on the receiver’s
reception quality.
!
Caution: if the active part of the aerial (the final 30 mm)
should be damaged, the aerial must be replaced by the
MULTIPLEX Service Department or a MULTIPLEX Service
Centre; the same applies to damaged aerial feed cables.
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