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Receiver initialization
Preliminary remarks about the GR-32 DUAL receiver
Receiver system
mc-20
The
HoTT remote control set includes a type
GR-32 DUAL, 2.4 GHz bidirectional receiver for
connecting up to 16 servos.
After switching on this HoTT receiver, should "its"
transmitter not be within range or switched off, then
the receiver's red LED will illuminate continuously for
about 1 s then begin to blink slowly. This indicates the
receiver has not (yet) established a link to a Graupner
HoTT transmitter. If a link has been established, the
green LED will illuminate continuously and the red
LED will extinguish.
In order to establish a link to the transmitter, the
Graupner HoTT receiver must fi rst be "bound" to
"its" particular model memory in "its" Graupner
HoTT transmitter. This procedure is known as
"binding". This "binding" linkage is only necessary
once for each receiver/model memory combination.
Refer to pages 77 or 85. The "binding" procedure
has been done at the factory for model memory
1 of the units delivered together as a set so this
"binding" procedure will only be necessary to link
additional receivers or if a memory location change
becomes necessary (and – e.g. after a change of
transmitter – can be repeated anytime).
On-board voltage display
The current voltage of the receiver's power supply will
be shown in the right side of the transmitter's screen
if a telemetry link exists between the receiver and
transmitter.
Temperature warning
Should the receiver's temperature sink below an
adjustable threshold (default value -10 °C) or rise
above an adjustable threshold (default value +55 °C)
, an acoustic warning will be issued by the transmitter
in the form of a uniform beep of about 1 s duration.
The aforementioned threshold limits are stored and
adjusted in the receiver.
46
Receiver initialization
Servo connections and polarity
Graupner HoTT receiver servo connections are
numbered. The connectors used are keyed against
polarity reversal. Pay attention to the small side
chamfers when plugging in these connectors. Never
use force.
The four outer, vertical connectors, designated with
"B + -" are intended for battery connections.
Do not reverse the polarity of this connection.
Reversed polarity could destroy the receiver and
devices attached to it.
The supply voltage is bussed across (i.e. common
for) all numbered connections. The function of
every individual channel is determined by the
transmitter used, not by the receiver. It is not only
the throttle servo connection which is different for
every manufacturer and model type. For example, in
Graupner remote control systems the throttle servo is
on channel 1 for winged aircraft and on channel 6 for
helicopter models.
Concluding notices:
•
The signifi cantly greater servo resolution
characteristic of the HoTT system produces a
noticeably fi rmer response behavior in comparison
to previous technology. Please take the time to
familiarize yourself with this sensitive behavior.
•
If you have a speed controller with integrated
BEC* arranged in parallel with the receiver battery,
its positive pole (red cable) may to be removed
from the 3-pole connector. Be sure to look for
notices about this in the instructions for the speed
controller used.
With a small screwdriver, carefully lift up the the
connector's center latch (1) just a bit then pull out
the red lead (2) and tape it up
with insulation tape to prevent
possible short circuits (3).
* Battery Elimination Circuit
Follow the installation instructions on page 52 for the
receiver, the receiver antenna and for mounting the
servo.
Reset
To execute a reset of the receiver, press and hold the
SET
button on the receiver's top-side while switching
the power supply on.
If a receiver reset is done while the transmitter is
switched off or on a receiver which is not bound,
the receiver's LED will slowly blink red for about
2 or 3 seconds. Now release the button again. The
binding process can now be initiated right away on the
transmitter-side.
If reset is done on a bound receiver and the
corresponding model memory is active in the
powered on transmitter, the LED will illuminate in
green after 2 or 3 seconds as an indication that
the transmitter/receiver system is again ready for
operation. Now release the button again.
Please note the following:
A receiver RESET will cause ALL receiver
settings, except for binding information, to return
to their factory settings.
Therefore if a RESET is triggered unintentionally,
any custom settings that had been present in
the receiver before the reset will have to be
established again by way of the Telemetry menu.
A deliberate RESET is recommended, especially
if a receiver is to be "transferred" into another
model. This is a rather simple method to eliminate
settings which are no longer applicable.
rot
1
3
2
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