CORONA RP8D1 User manual

RP8D1 Manual
Receiver RP8D1
Thank you for purchasing the RP8D1 receiver – a small and light dual conversion 8 CH synthesizedreceiver!
With high performance using the latest receiver technology.
Why a Synthesized Receiver?
Synthesized receivers get rid of the inconvenience of using a crystal. Receivers with a crystal still use the
technology of the 1970’s where the user has to change the crystal to switch to a different frequency. Users
are either stuck to one frequency or have to bring more (expensive) crystals to the flying field. In addition,
every time the crystal is changed there is a chance of damaging the receiver. With a synthesized receiver, all
you need to do is push the button to switch to any channel you are transmitting at. With Corona’s technology
in developing and manufacturing of R/C products, the RP8D1 8 CH Dual Conversion receiver becomes the
smallest in the world. But do not only focus on its small size. Its high performance will also surprise you!
RP8D1’s Features
1. You can switch the frequency freely with the RP8D1 8 CH dual conversion synthesized receiver.
2. The 'one button' function makes it extremely easy to change frequency.
3. Despite the small size, the receiving range reaches as far as 1 mile!
4. The dual ceramic IF filters ensure ultra narrow selectivity, and can reject adjacent channel interference
effectively.
5. The RP8D1 can identify the shift polarity of the transmitter (FUTABA, JR) automatically.
6. DSP technology filters noise intelligently and eliminates glitches effectively.
7. Failsafe function to put servos in a predetermined position in case of lost signal reception.
Specifications
Size 1.8”x0.9”x0.5” (49x24x14mm)
Weight 0.32oz (9.2g)(with shrink wrap)
Sensitivity better than 2.0μV
Selectivity ±8kHz at 65dB down
Nr. of channels 8
RF technology Dual tuned RF circuitry
Analog filtering Dual 4 pole ceramic filter
Digital filtering DSP filtering with mild algorithm
Modulation FM/PPM
Shift polarity Positive or Negative (auto detect)
Case Shrink wrap
Operating Voltage 4.8V~6.0VDC
Operating Current 24mA.

Setting up the receiver
The setup procedure has 3 functions:
Mode I
- lock the receiver to the transmitter frequency
Mode II
- disable failsafe
Mode III
- enable failsafe
Failsafe ensures that the servos and/or ESC are set to a predetermined position within 0.5s after a loss of
reception. Without failsafe servos will respond erratically resulting in a loss of aircraft control in case
reception is lost.
Set up process
1. Turn on transmitter with the antenna extended
2. Power up the receiver. The receiver LED will flash 2 times quickly
3. Press the scan button on the receiver for 2 seconds
4. The LED will flash 3 times meaning the receiver is ready for the set up process (should it blink 2 times,
then press the button again for 2 seconds).
Keep a careful eye on the LED. The receiver will cycle through 3 modes successively.
It may be helpful to do the setup in a dark environment so you can better see the LED flashing.
Mode I
- Short lit followed by a short dark period, repeated 3 times
sequence will repeat 3 times. Pressing the button in this mode will start the frequency locking process. If the
button is not pressed, mode I will be entered.
Locking to the transmitter frequency
1. Turn on the transmitter with the antenna extended.
2. Turn on the receiver. The LED will blink 2 times. If the LED remains lit then the receiver is receiving
correct commands from a transmitter.
If the LED goes out then the receiver is not receiving any correct commands, in which case you should set
it up again...
3. To set it up, press the scan button for 2 seconds, then release it. The LED blinks 3 times now (should it
blink 2 times, then press the button again for 2 seconds). While in mode III , press the button shortly.
If the LED begins to blink quickly it means that the receiver is searching for a valid signal.
Wait for 2-3 seconds for the search to complete. Once the receiver is locked to the transmitter, the LED
will flash 2 times and then remain lit. If the LED goes out again, check the transmitter.
4. After the receiver has locked, if you don’t change frequency, the receiver will work whenever you
connect it to the power. No need to relock.
Caution: when locking your receiver, please ensure only your own transmitter is working and put your
receiver close enough to your transmitter.
Mode II
- Long lit followed by a long dark period, repeated 3 times
sequence will repeat 2 times. Pressing the button in this mode will disable the failsafe function. If the button
is not pressed, mode II will be entered.
Disabling the failsafe
1. Turn on the transmitter with the antenna extended.
2. Turn on the receiver. The LED will blink 2 times. If the LED remains lit then the receiver is receiving
correct commands from a transmitter.
3. To set it up, press the scan button for 2 seconds, then release it. The LED blinks 3 times now (should it
blink 2 times, then press the button again for 2 seconds). While in mode II, press the button shortly to start

the failsafe disabling process.
4. The LED will flash 2 times and then remain lit. The transmitter now does not control the receiver and the
failsafe has been disabled. You must now restart the receiver.
Mode III
- Short lit followed by a long dark period, repeated 3 times
sequence will repeat 2 times. Pressing the button in this mode will enable the failsafe function. If the button
is not pressed, mode III will be entered again.
If no button is pressed these 3 modes will repeat 10times, then end with 2 short LED flashes.
Enabling the failsafe
1. Turn on the transmitter with the antenna extended.
2. Turn on the receiver. The LED will blink 2 times. If the LED remains lit then the receiver is receiving
correct commands from a transmitter.
3. Adjust the sticks and switches on the transmitter to the position that you feel will best protect your aircraft
in the event of a loss of signal. Typically the throttle is decreased and a slight elevator input is required to
maintain a controlled glide slope. You should notice as you set the sticks and switches that the receiver is
responding indicating the transmitter and receiver are synchronized.
4. To set it up, press the scan button for 2 seconds, then release it. The LED blinks 3 times now (should it
blink 2 times, then press the button again for 2 seconds). While in mode III, press the button shortly to
start the failsafe enabling process.
5. The LED will flash 2 times and then remain lit. The transmitter now does not control the receiver and the
failsafe has been enabled. You must now restart the receiver.
During this setting step do not turn off the transmitter. Otherwise the receiver will not record the position
of sticks and switches and it will not retain a failsafe setting. Should this occur you will notice the LED
flashing twice and then going dark indicating that you will have to start the process over.
Caution:
1. Restart the receiver when the set up process of disabling or enabling the failsafe is completed.
2. While in Mode I, Mode II or Model III you can cut power to cancel the setting process. Do not cut power
in the process of locking receiver, disabling failsafe or enabling failsafe. Otherwise your receiver may be
damaged.
3. After enabling failsafe, please read just the transmitter settings of sticks and switches for the correct flight
conditions.
Installing the receiver
1. Plug in all the servos/ESC. Pay attention to the polarity of the connectors. Please consult the labels on the
case for the channel numbers and polarity.
Caution: If the polarity of the plugs is wrong, it can damage the servos/ESC.
2. If not using an ESC with a built in battery eliminator circuit (BEC), plug a 4.8V battery/switch harness
into any unused channel. If you are using all the channels for servos, use a Y harness to connect the
battery and servo to 1 channel.
3. Wrap the receiver in foam to isolate it from vibration and secure it in the aircraft with for instance a
rubber band.
4. Unwind the antenna fully. Do not coil or cut the antenna.
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