FrSky DHT (toggle switch) is a compact and versatile telemetry module designed for use with FrSky receivers. It enables two-way communication between your transmitter and receiver, providing real-time telemetry data such as voltage, current, altitude, and more. With its 11-bit resolution and 60mW output power, the DHT offers reliable and accurate data transmission. The toggle switch allows you to easily switch between different receiver modes, making it compatible with a wide range of FrSky receivers.
FrSky DHT (toggle switch) is a compact and versatile telemetry module designed for use with FrSky receivers. It enables two-way communication between your transmitter and receiver, providing real-time telemetry data such as voltage, current, altitude, and more. With its 11-bit resolution and 60mW output power, the DHT offers reliable and accurate data transmission. The toggle switch allows you to easily switch between different receiver modes, making it compatible with a wide range of FrSky receivers.
www.frsky-rc.com
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Instruction
Instruction
Instruction
Instruction Manual
Manual
Manual
Manual for
for
for
for DHT
DHT
DHT
DHT
1.
1.
1.
1. Introduction
Introduction
Introduction
Introduction
1.1
1.1
1.1
1.1 Description
Description
Description
Description &
&
&
& c
c
c
c ompatibility
ompatibility
ompatibility
ompatibility
1-WAY C ompatible with non-telemetry receiver s:
V8R4/V8R7-HV/V8R7-SP/V8FR-HV
2-WAY C ompatible with telemetry receiver s:
D4R/D4FR/D6FR/D8R/D8RSP
FW Firmware Upgrade
1.2
1.2
1.2
1.2 Specifications
Specifications
Specifications
Specifications
Dimension: 55*34*8 mm (2.17 ” L x 1.34 ” W x 0.32 ” T)
Operating Voltage Range: 6.0V-13.0V
Operating Current: 50mA
Output Power: 60mW
Resolution: 3072 (>11bit)
2.
2.
2.
2. Set
Set
Set
Set Up
Up
Up
Up
2.1
2.1
2.1
2.1 Installation
Installation
Installation
Installation process
process
process
process
1) Open the transmitter and find a clear position to locate the DHT module, the antenna connector, the small electronic
panel. The location of the antenna should be such that there is no metal touching the antenna after it is mounted.
2) Locate the battery power supply line, GND and PPM signal line. These are often a three-wire bundle or ribbon cable
connected to a separate transmitter circuit card. Use a voltmeter and/or oscilloscope to help identify the function of
each wire. (RED
(RED
(RED
(RED �
�
�
� V+;
V+;
V+;
V+; BLACK
BLACK
BLACK
BLACK �
�
�
� GND;
GND;
GND;
GND; YELLOW
YELLOW
YELLOW
YELLOW �
�
�
� PPM)
PPM)
PPM)
PPM)
3) D rill four holes on the transmitter as the picture guided, two holes on both sides are designed for screw installation,
others for green/red color LED and the button. （ see picture above ） ; then drill another hole for installing toggle switch in
a suitable place.
4) Attach the transmitter antenna to the RF connector. Turn the transmitter power on and check the power indicator LED
on the new DHT control panel. It is normally light RED.
2.2
2.2
2.2
2.2 Bind
Bind
Bind
Bind procedure
procedure
procedure
procedure
1) Ascertain that the transmitter is in the PPM mode. Turn the transmitter off.
2) Change toggle switch position to required mode to work with the receiver you are using. See the table above.
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3) Turn your transmitter on while holding the F/S button on the transmitter module . Release it in a few seconds. The RED
LED on the transmitter module will flash, indicating the transmitter is ready to bind to the receiver.
4) Connect the battery to the receiver while holding the F/S button on the receiver. The RED LED on the receiver will flash,
indicating the binding process is completed. Turn off both the transmitter and receiver.
5) Turn on the transmitter and re-connect the battery to the receiver. The RED SOLID LED on the receiver will indicate the
receiver is receiving commands from the transmitter. The receiver/transmitter binding will not have to be repeated
unless one of the two is replaced.
After the above steps are completed, both the transmitter and the receiver are ready to be used.
Warning
Warning
Warning
Warning :
:
:
: When
When
When
When working
working
working
working with
with
with
with two
two
two
two way
way
way
way telemetry
telemetry
telemetry
telemetry receivers
receivers
receivers
receivers (D8R
(D8R
(D8R
(D8R or
or
or
or D6FR),
D6FR),
D6FR),
D6FR), make
make
make
make sure
sure
sure
sure that
that
that
that the
the
the
the battery
battery
battery
battery and
and
and
and servos
servos
servos
servos
are
are
are
are plugged
plugged
plugged
plugged into
into
into
into CH1~CH8/CH1~CH6
CH1~CH8/CH1~CH6
CH1~CH8/CH1~CH6
CH1~CH8/CH1~CH6 rather
rather
rather
rather than
than
than
than side
side
side
side port
port
port
port (A2/Rx),
(A2/Rx),
(A2/Rx),
(A2/Rx), otherwise
otherwise
otherwise
otherwise damage
damage
damage
damage may
may
may
may occur
occur
occur
occur .
.
.
.
2.3
2.3
2.3
2.3 Range
Range
Range
Range check
check
check
check
A
pre-flight range check should be done before each flying session . Reflection s from nearby metal fences, concrete
buildings, or trees can cause loss of signal both during the range check and during flight.
The following steps are to be followed to perform the range check of the model before flight:
Place the model at least 60cm (two feet) above non-metal contaminated ground ( e.g. on a wooden bench).
1) The receiver antennas should be separated in the model, as described in the receiver manual, and not touching the
ground.
2) Place the antenna of the transmitter in a vertical position.
3) Turn on the transmitter and receiver, press the F/S button of the transmitter for 4 seconds to enter range check mode,
the RED LED of the transmitter module will be off, GREEN LED will flash rapidly, the BEEPER will sound. The
effective distance will be decreased to 1/30 of full range.
4) Walk away from the model while simultaneously operating the controls on the transmitter, confirming that all controls
operate normally to a distance of at least 30 meters (~30 yds).
5) Press the F/S button for 1S-4S to exit range check mode, the RED LED will be back on , indicating normal operation
is activated .
2.4
2.4
2.4
2.4 Signal
Signal
Signal
Signal loss
loss
loss
loss indicator
indicator
indicator
indicator and
and
and
and failsafe
failsafe
failsafe
failsafe setting
setting
setting
setting
In some special circumstances, such as strong interference, the signal may be lost. When signal is lost in a short
period, the receiver continues to try to search for the transmitter, at the same time it keeps the last command from the
transmitter, until a new command is received.
Failsafe is a useful feature in which all controls move to a preset position whenever the control signal is lost for a period
of time. FrSky receivers support failsafe function for all channels. F ollow the steps below to set failsafe:
1) Bind the receiver first and turn on both transmitter and receiver;
2) Move all controls to that desired as the failsafe position ;
3) Press briefly the F/S button of the receiver (less than 1 second) , the transmitter module will make a long “ beep ” (for
D8R only) or the GREEN LED of the receiver will flash twice, indicating the failsafe position has been set in the
receiver.
To
disable the failsafe function, re-bind the receiver.
Other
Other
Other
Other relevant
relevant
relevant
relevant documents
documents
documents
documents can
can
can
can be
be
be
be found
found
found
found on
on
on
on the
the
the
the FrSky
FrSky
FrSky
FrSky web
web
web
web page
page
page
page at
at
at
at these
these
these
these addresses:
addresses:
addresses:
addresses:
1) For V8 series: http://www.frsky-rc.com/download.asp?id=21
2) For Two Way series: http://www.frsky-rc.com/download.asp?id=22
www.frsky-rc.com
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FrSky DHT (toggle switch) Owner's manual
- Type
- Owner's manual
- This manual is also suitable for
FrSky DHT (toggle switch) is a compact and versatile telemetry module designed for use with FrSky receivers. It enables two-way communication between your transmitter and receiver, providing real-time telemetry data such as voltage, current, altitude, and more. With its 11-bit resolution and 60mW output power, the DHT offers reliable and accurate data transmission. The toggle switch allows you to easily switch between different receiver modes, making it compatible with a wide range of FrSky receivers.
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