Where to Fly
We recommend that you fly at a recognized model airplane flying field. You can find model clubs and fields
by asking your nearest hobby dealer.
Always pay particular attention to the flying field’s rules,
as well as the presence and location of
spectators, the wind direction, and any obstacles on the field. Be very careful flying in areas near power lines,
tall buildings, or communication facilities as there may be radio interference in their vicinity.
At the flying field
To prevent possible damage to your radio gear, turn the power switches on and off in the proper sequence:
1. Pull throttle stick to idle position, or otherwise disarm your motor/engine.
2. Turn on the transmitter power and allow your transmitter to reach its home screen.
3. Confirm the proper model memory has been selected.
4. Turn on your receiver power.
5. Test all controls. If a servo operates abnormally, don’t attempt to fly until you determine the cause
of the problem. (For PCM systems only: Test to ensure that the Failsafe settings are correct by
waiting at least 2 minutes after adjusting then, turning the transmitter off and confirming the proper
surface/throttle movements. Turn the transmitter back on.)
6. Start your engine.
7. Complete a full range check.
8. After flying, bring the throttle stick to idle position, engage any kill switches or otherwise disarm
your motor/engine.
If you do not turn on your system on and off in this order, you may damage your servos or control surfaces,
flood your engine, or in the case of electric-powered or gasoline-powered models, the engine may unexpect
-
edly turn on and cause a severe injury.
Make sure your transmitter can’t tip it over.
If it is knocked over, the throttle stick may be accidentally
moved, causing the engine to speed up. Also, damage to your transmitter may occur.
In order to maintain complete control of your aircraft it is important that it remains visible at all times. Flying
behind large objects such as buildings, grain bins, etc. must be avoided. Doing so may interrupt the radio
frequency link to the model, resulting in loss of control.
Do not grasp the transmitter's antenna during flight. Doing so may degrade the quality of the radio frequency
transmission and could result in loss of control.
As with all radio frequency transmissions, the strongest area of signal transmission is from the sides of
the transmitter's antenna. As such, the antenna should not be pointed directly at the model. If your flying style
creates this situation, easily move the antenna to correct this situation
Before taxiing, be sure to extend the transmitter antenna to its full length.
A collapsed antenna will reduce your flying range and cause a loss of control. It is a good idea to avoid
pointing the transmitter antenna directly at the model, since the signal is weakest in that direction.
Don’t fly in the rain!
Water or moisture may enter the transmitter through the antenna or stick openings
and cause erratic operation or loss of control. If you must fly in wet weather during a contest, be sure to cover
your transmitter with a plastic bag or waterproof barrier. Never fly if lightning is expected.
FrSky Electronic Co., Ltd. www.frsky-rc.com Contact us: [email protected]
Add: F-4,Building C, Zhongxiu Technology Park, No.3 Yuanxi Road, Wuxi, 214125, Jiangsu, China Technical Support: [email protected]
Version
1.1
FrSky Horus X12S-ISRM Manual
FrSky Electronic Co., Ltd. www.frsky-rc.com Contact us: [email protected]
Add: F-4,Building C, Zhongxiu Technology Park, No.3 Yuanxi Road, Wuxi, 214125, Jiangsu, China Technical Support: [email protected]
Version
1.1
FrSky Horus X12S-ISRM Manual
FCC Statement
Changes or modifications not expressly approved by the party responsible for compliance could void the user's
authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation.
This equipment generates uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications.
Make sure you set the country code to your corresponding country to match the regulations.
However, there is no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
RF warning statement:
The device has been evaluated to meet general RF exposure requirement. The device can be used in portable
exposure condition without restriction.
FrSky Electronic Co., Ltd. www.frsky-rc.com Contact us: [email protected]
Add: F-4,Building C, Zhongxiu Technology Park, No.3 Yuanxi Road, Wuxi, 214125, Jiangsu, China Technical Support: [email protected]
Version
1.1
FrSky Horus X12S-ISRM Manual
CE
The product may be used freely in these countries: Germany, UK, France,Italy, Spain, Belgium, Netherlands,
Portugal, Greece, Ireland, Denmark, Luxembourg, Austria, Finland, Sweden, Norway and Iceland.
FLYING SAFETY
Warning
:
To ensure the safety of yourself and others, please observe the following precautions.
Have regular maintenance performed.
Although your Horus X12S-ISRM protects the model memories
with non-volatile EEPROM memory (which does not require periodic replacement) and of a battery, it still
should have regular check-ups for wear and tear. We recommend sending your system to your FrSky
Service Center annually during your non-flying-season for a complete check-up and service.
Battery
Charge the batteries!
Using the standard Horus battery and charger, always recharge the transmitter
and receiver batteries for at least 8 hours before each flying session. A low battery will soon die, causing
loss of control and a crash. When you begin your flying session, reset your transmitter’s built-in timer, and
during the session pay attention to the duration of usage. Also, if your model uses a separate receiver
battery, make sure it is fully charged before each flying session.
Stop flying long before your batteries become low on charge. Do not rely on your radio’s low
battery warning systems, intended only as a precaution, to tell you when to recharge. Always
check your transmitter and receiver batteries prior to each flight.
Nickel–metal hydride Battery Safety and Handling instructions
FrSky Electronic Co., Ltd. www.frsky-rc.com Contact us: [email protected]
Add: F-4,Building C, Zhongxiu Technology Park, No.3 Yuanxi Road, Wuxi, 214125, Jiangsu, China Technical Support: [email protected]
Version
1.1
FrSky Horus X12S-ISRM Manual
Updates
FrSky is continuously adding features and improvements to our radio systems. Updating (via the pre-installed
MicroSD card in Horus X12S-ISRM TF Card Slot) is easy and free. To get the most from your new transmitter,
please check the download section of the FrSky website www.frsky-rc.com, for the latest update firmware and
how-to guide.
Horus X12S-ISRM installed the FrSky FrTX operation system. Do not hesitate to contact FrSky if you have ideas
and suggestions for current and future radio systems, or if you are willing to join the FrSky developing union to be
part of the projects.
﹡
The currently pre-installed firmware of Horus X12S-ISRM is FrSky FrTX firmware, developed and well tested by
FrSky. The transmitter also support the open source firmware.
IMPORTANT!
The Nickel–Metal Hydride battery (NiMH) batteries included in the Horus X12S-ISRM transmitter
are not to be confused with Lithium-Polymer (LiPo) batteries, or any other type of rechargeable battery
(including NiCd and LiFe). NiMH batteries require special charging criteria different than other rechargeable
batteries. Use only the FrSky transmitter charger included with this set for, or other chargers approved by FrSky,
to charge the NiMH batteries in the HORUS X12S-ISRM transmitter.
It’s important to understand the operating characteristics of Nickel–Metal Hydride battery (NiMH). Read the
specificationsprinted on the label of your NiMH battery and charger prior to use. Failure to follow the these
precautions can quickly result in severe, permanent damage to the battery and its surroundings and possibly result
in a FIRE!
IMPORTANT PRECAUTIONS
Do not leave a NiMH battery unattended at any time while being charged or discharged.
Do not attempt to charge NiMH batteries with a charger that is NOT designed for NiMH batteries, as
permanent damage to the battery and charger could result.
Always charge NiMH batteries in a fireproof location. Do not charge or discharge NiMH batteries on
carpet, a cluttered workbench, near paper, plastic, vinyl, leather or wood, or inside an R/C model or
full-sized automobile! Monitor the charge area with a smoke or fire alarm.
Do not charge NiMH batteries at currents greater than the “1C” rating of the battery (“C” equals the rated
capacity of the battery).
Do not allow NiMH cells to overheat at any time! Cells which reach greater than 140 degrees Fahrenheit
(60°C) should be placed in a fireproof location.
NiMH cells will not charge fully when too cold or show full charge.
It is normal for the batteries to become warm during charging, but if the charger or battery becomes
excessively hot disconnect the battery from the charger immediately!! Always inspect for potential damage
any battery which has previously overheated for potential damage, and do not re-use if you suspect it has
been damaged in any way.
Do not use a NiMH battery if you suspect physical damage has occurred to the pack. Carefully inspect the
battery for even the smallest of dents, cracks, splits, punctures or damage to the wiring and connectors.
DO NOT allow the battery’s internal electrolyte to get into eyes or on skin—wash affected areas immedi-
ately if they come in.
Model Setup for TANDEM X20 External RF Module
The external RF module can be powered on or off by
software. The setup process is the same as that for the
internal RF. External modules should be closed when
not in use.
Step 6:
Set Failsafe mode
There are 3 failsafe modes when enable: No Pulse, Hold, Custom.
Then rotate the Encoder to set your failsafe for each channel and short press Encoder to finish the setting. Wait 9
seconds before the failsafe takes effect.
Notice:
● When failsafe is disabled on TANDEM X20 side, the failsafe set on receiver side will be used.
● SBUS port does not support the No Pulse failsafe mode and always outputs. Set “Hold” or “Custom” for SBUS
port.
●
No Pulse: on loss of signal the receiver produces no
pulses on any channel. To use this type, select it in the
menu and wait 9 seconds for the failsafe to take effect.
● Hold: the receiver continues to output the last
positions before signal was lost. To use this type, select
it in the menu and wait 9 seconds for the failsafe to take
effect.
● Custom: pre-set to required positions on lost signal.
Move the cursor to the failsafe mode of channel and
press
Encoder, then choose the Custom mode. Move the
cursor to the channel you want to set failsafe on, and
press Encoder.
Step 7:
Range
Range refers to TANDEM X20 range check mode. A pre-flight range check should be done before each flying
session. Move the cursor to “STATE”, scroll the Encoder to select “RANGE” mode and press Encoder. In range
check mode, the effective distance will be decreased to 1/30. Press the Encoder again, turn to normal state.
