MULTIPLEX SYNTH DS IPD RX-9, RX-12 receiver Operating Instructions

Operating Instructions
RX-9 / RX-12 SYNTH DS IPD receivers — Software V 1.00
! These operating instructions are an integral part of this
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product. They contain important information and safety notes,
and should therefore be kept in a safe place at all times. Be sure
to pass them on to the new owner if you ever dispose of the
product.
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1. SPECIFICATION
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RX-9 SYNTH
DS IPD
35MHz 35MHz
A-band B-band
40/411)
MHz
72MHz
Order No.
# 5 5890 # 5 5900
# 5 5891
# 5 5892 # 5 5898
RX-12 SYNTH
DS IPD
35MHz 35MHz
A-band B-band
40/411)
MHz
72MHz
Order No.
# 5 5893 # 5 5901
# 5 5894
# 5 5895 # 5 5899
Servo channel count
1)
1)
36MHz
36MHz
1)
5. QUICK START
1)
1. Switch transmitter on.
2. Connect the receiver battery to the receiver and switch on.
⇒ LED flashes (RF channel search):
1,6 sec
LED Code 2
The RF channel search is concluded when the LED glows constantly:
9 (RX-9 SYNTH), 12 (RX-12 SYNTH)
FM/PPM dual conversion
with IPD (Intelligent Pulse Decoding)
Reception system
approx. 2 µV
Sensitivity
Current drain
LED Code 1
3.5 … 7.5 V2)
excl. battery backer ⇒ 4 — 5 NiCd / NiMH cells
incl. battery backer ⇒ 2 x 5 NiCd / NiMH cells
LED ON
3. Move any transmitter stick four times steadily to one end-point.
⇒ the LED must switch OFF / ON in time with the stick movement.
4. The RF channel setting procedure is concluded; the LED flashes:
1,6 sec
approx. 30 mA (excl. servos)
Operating voltage
Dual conversion technology
for secure reception even under critical reception conditions.
Error counter
The RX-12 SYNTH DS IPD offers12 equal-value, equally fast channels.
Automatic switching to MULTIPLEX PPM12 (12 servo channel) mode
when used with MULTIPLEX PROFI mc 4000 and ROYAL evo 12.
Integral battery backer for enhanced security
LED Code 5
5. Switch the receiver OFF, then ON again.
⇒ The receiver is ready for use; the LED flashes:
1,6 sec
LED Code 3
max. permissible continuous current: 4 A
max. peak current: 16 A (1 sec.)
Battery backer
Permissible
operating
temperature range
Aerial length
900 mm
Dimensions L x B x H
Weight
1)
2)
- 15°C … +55°C
approx. 52 x 38 x 21 mm
approx. 38 g
36, 41 and 72 MHz for export only; prohibited in Germany
A low-voltage power-on guard prevents the receiver operating if
switched on with a voltage below 4.5 V. Once operating, the receiver
works without problem down to a voltage of 3.5 V.
RX-9/12-SYNTH DS IPD instructions # 82 5542 (04-03-22) Errors and omissions excepted  MULTIPLEX
2. SAFETY NOTES
! Read the instructions before using the receiver for the first time
! Use the receiver for its intended application only (Î 3.)
! Be sure to use a power supply of adequate capacity (Î 7.)
! Read and observe the installation notes (Î 19.)
! Carry out regular range checks (Î 20.)
! Keep strictly to the following sequence when switching
on and off:
First switch the transmitter ON, then switch the receiver ON
First switch the receiver OFF, then switch the transmitter OFF
3. INTENDED APPLICATION
RX-9 SYNTH DS IPD and RX-12 SYNTH DS IPD receivers are designed
exclusively for use as radio control receivers for model sport applications.
Their use in man-carrying aircraft or industrial apparatus is prohibited.
4. SPECIAL FEATURES
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PLL synthesizer receivers, requiring no plug-in crystals.
Quick, simple change of RF channel using automatic channel search,
with Lock-on security by confirmed channel acceptance from the
transmitter.
Use of standardised FM/PPM transmission format ensures
compatibility with other makes of equipment
IPD decoder (Intelligent Pulse Decoding) with HOLD and FAIL-SAFE
functions
6. RECEIVER CONNECTIONS
The RX-9 SYNTH DS IPD and RX-12 SYNTH DS IPD receivers are fitted
with universal UNI sockets which are compatible with the plugs used by
most radio control manufacturers (HiTEC, robbe/Futaba, Graupner/JR,
…).
! Check plug polarity carefully when connecting the receiver
battery, servos, speed controllers etc. Check the pin
configuration, especially with other brands of device (see “pin
assignment” symbol on receiver).
7. POWER SUPPLY
RX-9 SYNTH DS IPD and RX-12 SYNTH DS IPD receivers work without
problem over a broad voltage range of 3.5 — 7.5 V
(Æ 4—5 cell NiCd or NiMH receiver battery).
7.1
Using one receiver battery
The receiver battery should be connected as follows:
• RX-9 SYNTH DS IPD:
Æ Connect one 4-5 cell pack to socket “B”, or any vacant servo
socket “1” … “9”.
• RX-12 SYNTH DS IPD:
Æ Connect one 4-5 cell receiver battery to any vacant servo socket
“1” … “12”.
! Check the maximum permissible operating voltage of all devices
connected to the receiver (servos, etc.)!
For example, some servos are only approved for use with 4 cells (4.8 V).
7.2
Use of two receiver batteries (battery backer)
A battery backer enables the user to install a dual power supply for the
receiving system, which provides an extra margin of safety. In this case
two receiver batteries are used, de-coupled from each other by the
battery backer. The advantages of a dual power supply are as follows:
• If one battery or switch harness fails, the second battery continues to
supply power to the receiving system.
• The total current load of the model’s airborne receiving system is
shared by two batteries and two sets of connector contacts.
The RX-9 SYNTH DS IPD and RX-12 SYNTH DS IPD receivers are fitted
with integral battery backers. If you wish to use the integral backer,
connect one 5-cell pack to the socket marked “B1/D”, and the second one
to “B2/D”.
MULTIPLEX Modellsport GmbH & Co.KG • Neuer Weg 2 • D-75223 Niefern-Öschelbronn • www.multiplex-rc.de
Operating Instructions
RX-9 / RX-12 SYNTH DS IPD receivers — Software V 1.00
! If you use the internal battery backer then you must not connect
any additional batteries to any other sockets!
! The load current on the internal battery backer varies according
to the number and type of consumer units (servos) connected to
the system. The maximum value must not be exceeded (see
Specification)!
For large-scale models with many powerful servos and a correspondingly
high total current drain, in the interests of safety we recommend the use
of a high-quality professional power supply, as produced by a number of
specialist manufacturers. These power supplies generally feed energy
directly to the consumer units (servos) from the dual battery system, and
not via the receiver. The power supply usually delivers a stabilised
current to the receiver.
! Note
A power supply (battery system) in good condition and of adequate
capacity for the purpose is indispensable for the safe operation of any
model:
• Use only high-quality receiver batteries of adequate capacity. The
cells should be balanced, and the pack properly maintained and
charged.
• Cables should be of adequate conductor cross-section. Keep all leads
as short as possible, and avoid unnecessary connectors.
• Use high-quality switch harnesses exclusively.
• If the system voltage falls below 3.5 V the receiving system may fail
to work properly. Such voltage collapses may occur due to flat, poorquality or defective receiver batteries, or from overloading or faults
in the BEC system.
8. USING THE RECEIVER / LED INDICATORS
The RX-9 SYNTH DS IPD and RX-12 SYNTH DS IPD receivers are fitted
with one LED and one button. These are used as follows:
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To set the RF channel
To activate the FAIL-SAFE function and set the FAIL-SAFE positions
To switch off the IPD filter (e.g. for range checks)
To display the error count
To reset the receiver to the factory default settings (RESET)
The various operational states are indicated by the LED. The following
section describes the receiver settings and corresponding LED CODES.
RX-9/12-SYNTH DS IPD instructions # 82 5542 (04-03-22) Errors and omissions excepted  MULTIPLEX
9. SWITCHING ON
If you have already set the receiver to an RF channel, the LED flashes
after you switch it on:
1,6 sec
LED Code 3
(Æ IPD filter active Î 11. ). The receiver is ready for use.
If the receiver picks up an invalid signal, or no signal at all, when it is
switched on, the LED glows constantly until a valid signal is received:
LED Code 1
LED ON
If you have not yet set an RF channel (new receiver, or after a RESET), the
RF channel search commences automatically. The LED flashes during the
RF channel search:
1,6 sec
LED Code 2
(Æ Setting the RF channel Î 10. )
Note:
The receiver checks the operating voltage after the battery backer: the
value must be above 4.4 V immediately after it is switched on. If not, the
receiver will not work until the voltage rises to a value above 4.8 V. If this
should happen, the LED lights up briefly, then stays off until an operating
voltage of more than 4.8 V is present:
LED Code 0
LED OFF
10. SETTING THE RF CHANNEL
With the RX-9 SYNTH DS IPD and RX-12 SYNTH DS IPD receivers the RF
channel is set by means of an RF channel search, during which the
receiver searches for the most powerful transmitter on the band. For this
reason it is essential that your transmitter, set to the desired RF channel,
should be in the immediate vicinity of the model (receiver) during the RF
channel search. During the RF channel search keep the receiver a
reasonable distance (> approx. 3 m) from other transmitters which are
switched on.
Sequence
1. Switch on the transmitter, already set to the desired RF channel,
Hold the receiver button pressed in,
Switch the receiver on,
Release the button.
Æ The RF channel search commences; the LED flashes:
1,6 sec
LED Code 2
Note:
The RF channel search generally takes about 2 - 4 seconds. If the
process takes significantly longer, this indicates that no clear
transmitter signal is present. Check that your transmitter is switched
on, and that no other transmitter is in the immediate vicinity. Repeat
Step 1.
2. The LED glows continuously when a transmitter is located:
LED Code 1
LED ON
3. Now move one transmitter stick four times steadily to the same endpoint. The LED should go OFF in time with the stick movement. This
is your means of checking that the receiver has locked onto the
correct RF channel.
The process is complete when the LED flashes the confirmation
signal:
1,6 sec
LED Code 5
4. The receiver must now be switched off, then on again (Î 9. ); it will
now be operating on the set RF channel.
The receiver stores the set RF channel permanently until either you set a
new RF channel, or RESET the receiver to the factory default settings
(Î 14. ).
Note:
The signal output to the servo outputs remains switched off during the
RF channel search process, i.e. the servos do not move, and (modern)
electronic speed controllers stay OFF, because the signal is absent.
Nevertheless, it makes sense to secure the model and keep well clear of
hazardous parts.
11. IPD (INTELLIGENT PULSE DECODING)
The RX-9 SYNTH DS IPD and RX-12 SYNTH DS IPD receivers feature an
IPD decoder; the abbreviation IPD stands for Intelligent Pulse Decoding.
The “intelligence” takes the form of a micro-processor which analyses the
signals picked up from the transmitter, processes them (where
necessary) and then passes them on to the servos. The received signals
are not simply passed on directly to the servos, as with conventional
FM/PPM receivers, but are checked for interference and validity.
The advantages of IPD technology:
1. Only permissible signals “get through”
IPD checks the signals for limit values: pulse widths within the range
890 µsec and 2350 µsec are permissible. Most radio control
transmitters work within these limits, including other makes of
equipment.
2. “Invalid” signals are substituted (HOLD)
If an invalid signal is picked up, the receiver continues to pass on the
last received valid signal until a “good” signal is received again
(HOLD period). This suppresses interference, or at least reduces its
effects.
3. “Safety setting” in the case of total failure (FAIL-SAFE)
If no valid signal is picked up beyond the HOLD period (0.5 sec.) the
IPD receiver moves the servos to a freely programmable setting
(FAIL-SAFE positionÎ 12. ), e.g. motor to idle, control surfaces to
neutral.
MULTIPLEX Modellsport GmbH & Co.KG • Neuer Weg 2 • D-75223 Niefern-Öschelbronn • www.multiplex-rc.de
Operating Instructions
RX-9 / RX-12 SYNTH DS IPD receivers — Software V 1.00
4. IPD monitors reception quality
The signal analysis process is automatically adjusted to suit the
current reception quality (field strength). Powerful signals are passed
on to the servos unchanged, but weak received signals are
“processed”. The nominal servo positions are then calculated from
the last “good” signals. This greatly reduces the effect of
interference, but the pilot remains aware of the problem (unlike with
PCM). He receives a warning, and is able to react appropriately.
5. IPD is compatible
IPD works on the same basis as the current FM-PPM transmission
pro-cess. IPD receivers, with all their advantages, can therefore be
used with most RC systems. A further advantage of FM-PPM
transmission lies in the fast signal transmission of up to 12 servo
channels, all of equal speed and value.
13. SWITCHING OFF THE IPD FILTER
The IPD filter (Î 11. ) can be switched off if necessary. In this mode the
receiver operates like a conventional FM/PPM unit, i.e. the signals picked
up are passed directly to the servos (etc.). This can be useful, for example,
to locate sources of problems to the receiver caused by the power
system, or the arrangement of the receiving system components. The
filter should always be switched off for range-checking, so that it does
not filter out any interference (undesirable in this case). Changes can
then be made as required.
Sequence
1. Switch the transmitter on, then switch the receiver on. The LED
flashes:
1,6 sec
LED Code 3
12. ACTIVATING FAIL-SAFE
The effect of the FAIL-SAFE settings is that the servos (etc.) take up a predefined position, previously stored in the receiver, if interference occurs.
If FAIL-SAFE has not been activated (factory default state, or after a RESET
(Î 14. ), the signal is switched off after the HOLD period (0.5 sec.). This
means that the servos become “soft” and remain in their last
commanded position under no load (this may equate to full-throttle!)
until a valid signal is picked up again.
! Note:
In the interests of safety we recommend that FAIL-SAFE should always
be activated, and the FAIL-SAFE settings should be selected so as to
bring the model to a non-critical flight situation (e.g. motor idle / electric
motor OFF, control surfaces neutral, landing flaps extended, aero-tow
release open, …).
Sequence
1. Switch on the transmitter, then the receiver. The LED flashes:
1,6 sec
RX-9/12-SYNTH DS IPD instructions # 82 5542 (04-03-22) Errors and omissions excepted  MULTIPLEX
LED Code 3
2. Move all the transmitter sticks and other controls to the desired FAILSAFE positions (e.g. motor idle, control surfaces neutral).
3. Press the button briefly (approx. 0.5 seconds); the LED goes out.
⇒ FAIL-SAFE is now active, and the FAIL-SAFE settings are stored.
Note:
If you hold the button pressed in for too long (> 2 sec. - until the LED
comes on), the IPD filter is switched off (Î 13. ).
In this case FAIL-SAFE is not activated, and the FAIL-SAFE settings are
not stored!
4. Testing the FAIL-SAFE settings
Move the sticks to positions other than the FAIL-SAFE settings, then
switch off the transmitter. The servos should now move to the FAILSAFE settings previously stored, once the HOLD period (0.5 sec.) has
elapsed.
Notes:
• The FAIL-SAFE settings are only stored if the IPD filter is active, and if
no errors are displayed:
1,6 sec
LED Code 3
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If you change the transmission mode (e.g. PPM 7ÆPPM 9, PPM
9ÆPPM 12), you must re-set the FAIL-SAFE positions! (Î 18. )
The FAIL-SAFE settings must always be checked and brought up to
date if, for example, you install the receiver in a new model, or make
an accidental mistake in programming the receiver (Î 12.4 ).
The maximum FAIL-SAFE duration is limited to 15 seconds. After this
the servo signal is switched off ⇒ the servos become “soft”, an
electric motor speed controller switches off the motor in the absence
of a signal.
This eliminates the danger of jammed control surfaces stalling the
servos (e.g. after a crash), which would usually wreck them.
If FAIL-SAFE has not been activated, servos with their own HOLD or
FAIL-SAFE function (e.g. MULTIPLEX mc and mc/V2 series digital
servos) do not become “soft” after the HOLD period has elapsed.
2. Press the button (the LED goes out), and hold it pressed in until the
LED comes on again (after about 2 seconds.
The LED then flashes as follows:
1,6 sec
LED Code 4
Exception: RX-SYNTH set-up lead:
In this case the LED does not glow when the button is pressed in!
You can re-activate the IPD filter by either of the following methods:
• Switch the receiver off, then on again
• Hold the button pressed in again for >2 seconds (see above)
! Note:
In the interests of safety the IPD filter should only be switched off for
range checks or other experimental purposes. Normal operations (flying,
running the model) should always be carried out with the IPD filter
activated.
14. RECEIVER RESET
The receiver settings can be switched back to the factory default values.
All settings (RF channel, FAIL-SAFE settings) are lost when you do this,
and the receiver acts like a brand-new receiver, fresh from the factory.
Sequence
1. Switch the transmitter on, then switch the receiver on. The LED
flashes:
1,6 sec
LED Code 3
2. Press the button and hold it pressed in until the LED goes out - after
about 10 seconds.
The LED now flashes the confirmation signal:
1,6 sec
LED Code 5
The signal output is switched off after you carry out a RESET. The receiver
can only be used again after switching it off, then on again (Î 9. ).
A RESET can also be triggered without a transmitter signal. For this to
work an RF channel must have been set previously.
15. ERROR COUNT
The receiver features three internal error counters for the following
errors:
• Low voltage
• Reception blind spots (severe field strength fluctuations)
• Signal interference
The LED displays the sum of the errors in the three error counters as soon
as an error is detected:
1,6 sec
LED Code 6
1,6 sec
LED Code 7
1,6 sec
LED Code 8
MULTIPLEX Modellsport GmbH & Co.KG • Neuer Weg 2 • D-75223 Niefern-Öschelbronn • www.multiplex-rc.de
1 — 9 errors
10 - 29 errors
>30 errors
Operating Instructions
RX-9 / RX-12 SYNTH DS IPD receivers — Software V 1.00
In our experience the errors described here occur during most flights.
After a few flights, with subsequent analysis of the error count, you will
find the error counter helpful as an early method of detecting
irregularities in operating the model, in order to eliminate problems (e.g.
in the power supply circuit, interference caused by the power system,
etc.
15.1 Low voltage error count
The counter counts the seconds during which the voltage (after the
battery backer) falls below 4.4 V, either briefly or constantly.
If a serious voltage collapse occurs (below 3.0 V) the receiver’s processor
re-starts. In this case the values for all three error counters are lost.
15.2 Field strength fluctuations error count (reception blind spots)
The counter counts the seconds in which the field strength collapses.
Instances of constant low field strength (transmitter off) are not counted.
15.3 Signal interference error count
The counter counts the seconds in which the signal packet is not within
the prescribed format, e.g. too many, too short or too long servo signals.
If voltage falls (voltage collapse), reception blind spots and signal
interference are not counted. If a blind spot occurs, signal interference is
not counted.
Note: power-on delay
The error counters only start operating after a delay of 20 seconds after
the receiver is switched on.
Note: error counter when the IPD filter is OFF
If the IPD filter is switched off, the receiver does not count the signal
errors, and no errors are displayed. Errors are only displayed again when
the IPD filter is re-activated (Î 13. ).
RX-9/12-SYNTH DS IPD instructions # 82 5542 (04-03-22) Errors and omissions excepted  MULTIPLEX
16. DIAGNOSIS MODE
Diagnosis mode can be helpful when you need to carry out adjustments
on the model, but the transmitter is not to radiate an RF signal. The
transmitter (MULTIPLEX transmitter with multi-function socket) is
connected directly to the receiver using an MPX switch harness with
charge socket and a diagnosis lead, # 8 5105. The switch harness must
be connected to the socket marked “B1/D” or “B2/D” (D = Diagnosis)
When you switch the system on, the receiver detects that the diagnosis
lead is connected. The signal packet is received directly from the
transmitter via the diagnosis lead, and not via the RF link.
The RF signal is not restored automatically when you disconnect the
Diagnosis lead.
Note:
First switch the receiver OFF, then the transmitter OFF, then disconnect
the Diagnosis lead.
During Diagnosis operations the LED glows constantly. The error counter
does not operate during Diagnosis operations.
17. RX-SYNTH SET-UP LEAD # 8 5048
If the receiver is permanently installed in the model, and the button and
LED on the receiver are not accessible, the unit can be controlled using
the RX-SYNTH set-up lead which is available as an optional accessory.
Connect the lead to the socket marked “B2/D”, and install it in an easily
accessible location on the model. The RX-SYNTH set-up lead can be
extended if necessary using a standard UNI extension lead (e.g. # 8
5031).
Note:
When you press the button on the RX-SYNTH set-up lead, the LED on the
set-up lead does not light up!
18. AUTOMATIC SERVO CHANNEL COUNT DETECT /
12 CHANNEL OPERATION
During the first four seconds after switching on (Î 9. ) the receiver
detects the number of servo channels transmitted by the transmitter
(e.g. PPM 7, PPM 9, PPM 12) and stores this data. The number of servo
channels received from the transmitter is one criterion required by the
IPD filter in order to detect the transmission errors when the system is
operating.
! Note: every time you change the number of servo channels or the
transmitter’s operating mode (or when you use a different
transmitter), the receiver must be switched off, then on again. You
will also need to re-set the FAIL-SAFE settings (Î 12. ).
The servo channel count or the transmitter operating mode are changed
on the PROFI mc 4000 by switching the operating mode (e.g. PPM
7ÆPPM 9, PPM 9ÆPPM 12). On the ROYAL evo 9/12 the change is made
by altering the servo assignment, which necessarily involves a change in
transmission mode (PPM 6, 7, 8, 9 or 12).
12-channel mode
The receiver can be operated in 12-channel mode (PPM 12) in
conjunction with MULTIPLEX PROFI mc 4000 and ROYAL evo 12
transmitters. The receiver detects this mode from the first signals it picks
up when it is switched on, and automatically switches to the 12-channel
mode PPM 12.
19. INSTALLATION NOTES
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Receivers contain components which are sensitive to vibration. You
should therefore pack your receiver loosely in foam or similar
material to protect it from vibration - especially with internal
combustion motors.
Install the receiver at least 150 mm away from electric motors, petrol
engine ignition systems and other electronic components. The
receiver aerial should not run immediately adjacent to these
components.
Electric motors must be effectively suppressed (e.g. using our
suppressor set, # 8 5020). This does not apply to brushless motors.
If you have to use servo extension leads longer than 50 cm, you must
use a separation filter (e.g. # 8 5035) in each lead.
Do not alter the length of the aerial.
Route the aerial out of the model and extend it in as straight a line as
possible. Do not leave it coiled up.
For large-scale models we recommend the use of a whip aerial.
Avoid connectors in the receiver aerial if possible, but if inevitable
we recommend our aerial connector system: # 8 5233 (plug), # 8
5234 (socket).
Do not deploy the receiver aerial parallel to servo leads, high-current
cables or electrically conductive components (e.g. pushrods).
Do not deploy the aerial inside or over model components which are
skinned or reinforced with conductive materials (e.g. carbon fibre,
metallic paints etc.), as they have a shielding effect.
Keep to the recommended installation arrangement (sketches A - D).
20. CARRYING OUT A RANGE CHECK
It is very important to carry out regular range checks to ensure that the
radio control system works reliably. These checks also allow you to
detect problems and sources of interference in good time. This applies in
particular when:
• you are using new or altered components, or you have changed the
arrangement of components in the model;
• you are using radio control system components which were involved
in a previous hard landing or crash;
• irregularities or problems have arisen during previous flights.
Important:
• Always carry out the range check with the help of a friend who can
hold and watch the model (model aircraft 1 m above ground,
vehicles and boats on their running surface).
• For a range check install the telescopic transmitter aerial but leave it
completely collapsed. Don’t use a helical stub aerial for this!
• No other transmitters should be switched on during the range check.
The range of the RX-9 SYNTH DS IPD and RX-12 SYNTH DS IPD receivers
with transmitter aerial collapsed should be at least 80 m. You have
reached the range limit when the servos begin to move uncontrollably
and jitter, and no longer respond clearly to control commands. If your
transmitter has an automatic servo test program, use this for the range
check.
Important:
Carry out the initial range check with the motor or engine stopped.
Repeat the check with the power system operating (all throttle settings):
the range should not be significantly reduced. If it is much lower, seek
out and eliminate the cause of the problem (motor interference,
arrangement of the receiving system components and power supply,
vibration, etc.).
MULTIPLEX Modellsport GmbH & Co.KG • Neuer Weg 2 • D-75223 Niefern-Öschelbronn • www.multiplex-rc.de
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