Air Craft
DataSheet
BERG
TECHNOLOGY
DSP 6 SETUP
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Air Craft |
BERG |
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Setting Up your Berg 6*DSP GIII or Hyperion DSP*6-FS Receiver
Top
Pin: Signal White or Orange servo wire
Middle
Pin: (+) Positive Red servo wire
Bottom
Pin: (-) Negative Black or Brown servo wire
First
turn your transmitter
ON, and then turn on the switch for the receiver. For electric models using BEC speed
controller without switch, the receiver is ON when you connect the main power
pack to the speed controller. Make sure that the propeller is removed
from the motor during initial receiver set up.
These
are rather special receivers… As soon as powered ON, the receiver learns the
characteristics, or the ‘signature’ of your transmitter. For 72MHz radios (Berg 6 DSP) this includes
type of modulation (positive shift, JR, Airtronics, Multiplex) or negative
shift (Futaba, Hitec), and the receiver automatically adjusts to work with
either shift type. For 35/36MHz and 40MHz,
shift is not an issue, so this feature is not required in the Hyperion DSP*6
receivers.
Then,
it learns (and remembers) the number of channels, the keying pulse, and the
approximate frame rate of the transmitter.
After that process is completed (it takes all of a few seconds), the
receiver will only listen to that particular transmitter. This process which we call Transmitter
Signature Recognition, or TSR, gets ‘refreshed’ every time you turn the
receiver ON.
The receiver
then starts decoding your transmitter’s commands and passes these on to
the servos. Should the receiver
temporarily lose the signal from the transmitter then it will ‘fill in’ the
missing pulse or pulses. This condition is called HOLD. It does this indefinitely, but it will start
passing good pulses to the servos again as soon as the radio link is
restored. This process works much, much faster
than with PCM systems, and that is a very real advantage over PCM failsafe.
HOLD
is the default method the receiver uses.
You also have the option to pre-program all servo positions when signal is lost,
using Fail Safe Mode.
Should
you decide to turn ON the FailSafe (FS) mode, then be careful! You should
plan the way you program Fail Safe with forethought. When signal is lost in Fail Safe mode, there
is 2 seconds of HOLD, then all servos will revert to your
pre-programmed position.
If
you program the throttle FS position to FULL THROTTLE, for example, your system
will go to full throttle about 2 seconds after the radio link is lost. If you
taxi into the pits and forget to turn off the receiver switch before turning
off your transmitter the Fail Safe mode will start at whatever positions you
programmed. Obviously, then, you need to
carefully consider the Fail Safe programming - especially throttle position!
NEVER
TURN THE TRANSMITTER OFF BEFORE TURNING THE RECEIVER OFF.
TURNING ON: TRANSMITTER ON FIRST, THEN RECEIVER ON.
TURNING OFF: RECEIVER OFF FIRST, THEN TRANSMITTER OFF
But
you will find that this receiver has quite a bit of range, so you may never
experience the HOLD or FS mode entry in actual flight. In most cases of poor signal recovery occurs
well before fail safe mode is entered.
User Programmable:
*channel 5
output on channel 5 pins (factory default).
*channel 7
output on channel 5 pins.
*fail-safe mode
ON.
*fail-safe mode OFF (factory default)
Required for programming:
your transmitter, and two jumper “programmer” plugs (supplied).
Defaults: the receiver is shipped with
HOLD mode ON, Fail-Safe mode OFF, and channel 5 output
on #5 pin set.
Programming:
1. Place a jumper on channel 2 output
2. Install a servo on channel 1 output (the servo is your programming success indicator)
All
programming steps start with receiver OFF.
CAUTION: Don’t remove power
from the transmitter or the receiver during a programming cycle. If you do, you will not damage anything, but
you will have to start your entire programming cycle over.
To
select channel 7 output on channel 5 pins:
Put
second jumper on channel 4 output.
Transmitter
ON
Receiver
ON
Wait
for the servo on channel one to complete one cycle.
Turn
receiver OFF
To
select channel 5 output on channel 5 pins (default factory setting):
Put
second jumper on channel 3 output.
Transmitter
ON
Receiver
ON
Wait
for the servo on channel one to complete one cycle.
Turn
receiver OFF.
Turn
Fail-Safe mode ON:
Put
second jumper on channel 6 output. (put jumper on # 5
output to return to Fail Safe OFF again later)
Transmitter
ON
Receiver
ON
Wait
for the servo on channel one to complete one cycle.
Turn
receiver OFF.
When
done, remove jumpers and install receiver in aircraft.
Programming
Fail-Safe Servo positions
Caution:
with electric powered aircraft, REMOVE THE
PROPELLER !
Assuming
you have previously programmed FS ON, then you can proceed to this step.
The
default (factory preset) FS servo default “values” are:
Channels
1 and 3: 1 msec - with electronic speed controls
this is MOTOR OFF, for
safety.
All
other channels: 1.5 msec -
servo neutral for most
transmitters
With
the receiver in the aircraft and the aircraft on the bench, turn on transmitter
and receiver, operate the transmitter sticks and set all your servo directions,
trim, throws, mixing etc. to those positions you would like to have them in
should a complete loss of signal occur. Have
a helper hold your transmitter sticks in these positions. Be sure throttle is in OFF position, unless
you are SURE that you want it on.
Keep
transmitter ON.
Turn
receiver OFF
Put
a jumper plug on any open
receiver channels: the
aileron servo extension cable may be accessible, or the landing gear output, etc
Turn
receiver ON
Count
to 10
Remove
jumper plug from receiver.
Finished
Test
fail safe operation:
Transmitter
ON
Receiver
ON
Check
for control of all servos on the correct channels (sticks).
Put
all sticks in a random position and turn transmitter OFF.
All
servos should stay in their position for about two seconds of HOLD mode.
If
Fail-Safe is activated and properly programmed, all servos should move to their
previously programmed position after about 2 seconds.
If
they don’t, start the above procedure over.
note:
During the time the receiver is in HOLD
or Fail-Safe condition,as soon as the radio link is
re-established, then the servos will immediately respond to the transmitter
control inputs. HOWEVER, when a transmitter
is turned off and then on again, it may take up to eight seconds for the
transmitter to ‘boot up’ when you turn it back, so the control delay may be up
to eight seconds. So NEVER test your Fail
Safe Programming ‘in the air’ by turning your transmitter OFF and then ON
again, or this may be your last flight of the day!!
NOTE ON SPEED
CONTROLLERS AND BEC
When being used in electric airplanes, the receiver and
servos are frequently supplied their power via the throttle channel cable from
the Electronic Speed Control (ESC). Most ESCs are
equipped with a voltage regulator circuit, which acts as a Battery Eliminator
Circuit (BEC). BECs are specified to
supply a certain (maximum) current – should this current limit be exceeded then
the output voltage will be reduced. This means that your receiver and servos
could now be operating at voltage levels below their specified minimum. This
may cause servo slowdown, motor cut-out and, in worst case, failure of the
radio link. In most cases of reported
receiver failure, the root cause can be traced to an overloaded ESC BEC. Example: A typical 3-cell LiPo
battery produces about 12 Volts. The BEC
capacity of the ESC, when using only 2 miniature servos, is probably reached in
this case. With 3 servos, the limit may be exceeded at
short intervals; with 4 servos, failure is likely to occur. Suggestion:
Always check the maximum BEC current specified by the manufacturer of
the ESC and dimension your servo count accordingly to prevent BEC overload and
possible unexpected motor shut down and/or radio link failure.
Specifications: (that make the Berg Technology Receivers the Best in the World) |