Multiplex Channel-Check plus Manual De Instrucciones página 5

7. T C -C
HE HANNEL HECK FUNCTION
! Note: always extend the transmitter aerial fully before
you switch the transmitter on !
During the channel-checking procedure the transmitter aerial
acts as a receiver aerial. For this reason it must always be ex-
tended to its full length before you switch the transmitter on, oth-
erwise it could fail to detect a transmitter already operating in the
vicinity.
When you switch the transmitter on, the Channel-Check PLUS
module checks whether the set channel is free. During the
Channel-Check process no RF signal is transmitted (the blue RF
status LED glows constantly). If the set channel is in use, or is
suffering interference, no RF signal will be transmitted. This pre-
vents the danger of the transmitter affecting a model which is
already flying.
If the channel is in use, or if interference is detected, the trans-
mitter emits a quadruple warning sound.
A display similar to the following will appear on the screen:
Strength of the received
signal (display left and right)
The selected channel (74), operating on a frequency of 35.140
MHz, is in use or suffering interference. Both trim displays show
the strength of the unwanted signal:
no signal weak
measurable
You can now use the 3-D digi-adjustor to select a different
channel, and the module will display the signal strength on that
frequency.
If a weak signal is displayed:
If you are close to other modellers (< 10 m), mixed signals from
the other transmitters may generate an interference signal on
your channel, which the Channel-Check PLUS module in your
C SX detects as "channel in use or suffering interference".
OCKPIT
Radio control transmitters which are operating on an adjacent
channel (in our example channel 73 or 75) can also produce an
unwanted signal display (adjacent channel interference).
If this should happen, walk away from the other transmitters. If
the display now changes to "no signal measurable", the problem
is an ICM (inter-channel modulation) problem or adjacent chan-
nel interference.
Switch the transmitter on again at a little distance from the other
pilots. You will need to switch off, then on again, to do this.
! Caution:
The Channel-Check PLUS function does not remove the re-
quirement for you to carry out frequency control and / or
check with the other pilots!
If your radio installation in the model is inefficient, if it is used in-
correctly, or if a fault occurs, it is still possible that a transmitter
fitted with a Channel-Check Plus module will switch on when the
selected channel is already in use by another transmitter.
MULTIPLEX Modellsport GmbH & Co.KG • Westliche Gewerbestraße 1 • D-75015 Bretten (Gölshausen) • www.multiplex-rc.de
Operating instructions
Channel-Check PLUS for the COCKPIT SX
moderate strong very
strong
8. T
HE MANUAL SCAN FUNCTION
Note: during the scanning process the transmitter does not radi-
ate an RF signal. The RF status LED glows constantly.
Starting a manual scan
To switch a COCKPIT SX transmitter with Channel-Check PLUS
module to scan mode, hold the 3-D digi-adjustor pressed in
while you switch the transmitter on.
The screen displays the frequency (e.g. 35.140 MHz), to which
the Synthesizer of your COCKPIT SX is set. The associated
channel number (74) flashes in the line below this.
Three different displays are now possible:
a. no Channel- b. no signal
Check PLUS measurable
present
Manual scan
You can now use the 3-D digi-adjustor to select any of the chan-
nels available on your transmitter, and the module will display
the signal strength on that frequency.
Interpreting the screen displays
If no measurable signal is present on a particular channel (aerial
completely extended and held vertical) (see display b.), this
means the following: there is no radio control transmitter operat-
ing on this channel in a radius of around 300 m.
CAUTION !
The stated range of 300 m varies according to the terrain and
the geographical circumstances, and should only be viewed as
an approximation.
You can build up a "picture" of the actual conditions at your fly-
ing site by selecting the channel of a transmitter which is already
switched on, and walking to particular distinctive points within
the bounds of your field.
9. N
OTES REGARDING MANUAL SCAN MODE
Searching for channels / frequencies in use at a flying site
During the manual scan procedure keep about 10 m away from
other transmitters. This will avoid misleading displays caused by
interactions between transmitters in the immediate vicinity.
10. D
ISPOSAL
Electrical equipment marked with the crossed-out
waste bin must not be discarded in the normal do-
mestic waste. Such items must be taken to a suitable
specialist waste centre for proper disposal.
In EU countries (European Union) electrical devices
must not be discarded through the normal domestic
refuse system (WEEE - Waste of Electrical and Electronic
Equipment, directive 2002/96/EG). You can take your unwanted
items to a local authority collection centre or your nearest recy-
cling centre, where the personnel will dispose of your equipment
properly, and at no cost to you.
c. channel in use
or interference
(signal very
strong)
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