Retekess TD021 User Manual page 2

Abstract
A repeater is a wireless device for transmitting and receiving data. The
transferred signal must meet the following two requirements：
1. Same received frequency as the repeater.
2. Matching the oscillation resistance of the receiving part of the repeater.
Currently supported signal mode is PT2240/1.8M.
This repeater can cascade three Repeaters if the distance is not reached.
The repeater has a learning function and can store 100 transmitters, which
helps transfer some signals alternatively, to avoid interference from other
unrelated signals.
Product Parameter
Operating frequency: 433.92MHz
Operation voltage: DC12V
Quiescent current：30mA
Operating current：<255mA
Receiving sensitivity：-108dBm
Transmitted power：500mW (A launch range of about 1500m in the open field)
Marking instruction
Turning the switch up means ON
Turning the switch down means OFF
■The black part means the position of the handle
POWER indicator light: power light
SEND indicator light: Transit light. It will be on once it transits signals.
8 bit dialing switch: At the bottom of the shell, each dial code switch has two
states of ON and OFF. There is a mark on the dial code switch. Please
check the function of each dial code switch. As follows：
The first switch: In the ON position, the first one is represented when the
repeater is cascaded.
The second bit: In the ON position, the second one is represented when the
repeater is cascaded.
The third bit: In the ON position, the third one is represented when the repeater
is cascaded.
The fourth bit: When both the fourth bit and the sixth bit of the repeater are in
the ON position in the ON position, press the learned remote control.
The light will flash three times to clear the remote control of this way.
It is quite useful to clear one when it learned multiple remote controls.
The fifth bit: Control the transit interval，which is about 6 seconds when it is
in OFF state. (Suitable for 4-6 repeater cascades)
The sixth bit: In the ON position, only the learned emitter is transferred (this
position needs to be in the ON state when there are more than two
repeaters in the same place). When this position is in the OFF state,
No learning is required to relay the matching transmission signal.
The seventh bit: When learning, this position should be in ON state. In normal
operation, this position shall be placed in the OFF state.。
The eighth bit: Test bits. When the ON state is set, the relay continuously
transmits (PT2262 1.2m) signal. In normal operation, this position
shall be placed in the OFF state.
Operating instructions
1. Install the relay position：When relaying a signal, the relay should be placed
between the signal being relayed and the receiver, and it shall be positioned
according to the strength of the transferred signal. After the relay position is
adjusted, the receiver position should be adjusted again.
emitter receiver repeater
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2. Set the relay signal cascade mode：Connecting to DC12V POWER supply,
POWER indicator is on and the relay is in transit state. With only one
repeater, all three dial switches are OFF when the transit speed is faster. If
two or three Repeaters are needed, the no. 5 dial code switch is dialed to
the OFF end.After pressing the same button to transfer, it shall come to
effect after 6 seconds；If 4 to 6 Repeaters are needed, the no. 5 dial code
switch is dialed to the ON end. After pressing the same button to transfer, it
shall come to effect after 12 seconds. About the specific configuration, Refer
to the chart below:
(note: Among 1 ~ 3 bit dial code switch, which repeater to be set is subject
to the accumulated quantitative value. For example, The first is Dial 1 to
the ON end, then the fifth is 2 and 3 to the ON end. The rest can be done
in the same manner.)
when a repeater is
in use, Code switch
Settings are shown
in the right figure
When cascade the
first repeater, dial
code switch Settings
is shown in the right
figure
When cascade the
second repeater,
dial code switch
Settings is shown
in the right figure
When cascade the
third repeater, dial
code switch Settings
is shown in the right
figure
3. Learn about the relayed transmitter: Turn the code switch 6 and 7 to ON,
then trigger the emitter, SEND light flashing twice to show success. If
continue to learn, press the emitter that need to learn. The light flashes to
indicate success of learning. After learning, turn the 7 th dial code switch to
OFF state, at this time The repeater can only relay learned transmitters.
4. Delete all learned emitters：Before power on or within 15 seconds after
the restart, dial code switches 7 and 8 to ON and SEND light blinked three
times, indicating that all learned emitters have been removed.
5. Delete a single learned emitter: Dial the code switch 4 and 6 to the ON end
and Click on the learned remote control. The light flashes three times to
indicate clear success. Click the remote control to clear it if you want to
continue. When the clearance is completed, dial the code switch 4 to the
OFF end.
Announcement
1. When installing the repeater, the antenna should be kept up and away
from metal objects and walls.
2. This product is not waterproof, it should be placed indoors or do waterproof
treatment when installing.
3. If the receiver cannot receive the signal, we need to confirm whether the
relay can receive the transmitter's signal. If no signal is received, the relay
needs to be moved closer to the transmitter, until the relay can receive the
transmitter signal.
Adjust the receiver position again and move the receiver close to the relay.
4. Power supply requirement: DC12V output, output curren>300mA
5. Do not set the dial code switch 7 and 8 ON at the same time before
plugging in, otherwise it will delete all the learned emitter before.
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Warnings
This radio uses electromagnetic energy in the radio frequency (RF) spectrum
to provide communications between two or more users over a distance. RF
energy, which when used improperly, can cause biological damage.
All Retekess radios are designed, manufactured, and tested to ensure they
meet government-established RF exposure levels. In addition, manufacturers
also recommend specific operating instructions to users of the radios. These
instructions are important because they inform users about RF energy
When cascade the fourth exposure and provide simple procedures on how to control it.
repeater, dial code switch
Please refer to the following websites for more information on what RF energy
Settings is shown in the
exposure is and how to control your exposure to assure compliance with
right figure
established RF exposure limits: http://www.who.int/en/
When cascade the fifth
Local Government Regulations
repeater, dial code switch
When radios are used as a consequence of employment, the Local Govern-
Settings is shown in the
ment Regulations requires users to be fully aware of and able to control their
right Figure
exposure to meet occupational requirements. Exposure awareness can be
facilitated by the use of a product label directing users to specific user
awareness information. Your Retekess radio has a RF Exposure Product
When cascade the sixth
Label. Also, your Retekess user manual, or separate safety booklet includes
repeater, dial code switch
information and operating instructions required to control your RF exposure
Settings is shown in the
and to satisfy compliance requirements.
right figure
Radio License (if appropriate)
Governments keep the radios in classification, business radios operate on
radio frequencies that are regulated by the local radio management depart-
ments (FCC, ISED, OFCOM, ANFR, BFTK, Bundesnetzagentur...).To
transmit on these frequencies, you are required to have a license issued by
them. The detailed classification and the use of your radios, please contact
the local government radio management departments.
Use of this radio outside the country where it was intended to be distributed
is subject to government regulations and may be prohibited.
Unauthorized modification and adjustment
Changes or modifications not expressly approved by the party responsible
for compliance may void the user's authority granted by the local government
radio management departments to operate this radio and should not be made.
To comply with the corresponding requirements, transmitter adjustments
should be made only by or under the supervision of a person certified as
technically qualified to perform transmitter maintenance and repairs in the
private land mobile and fixed services as certified by an organization
representative of the user of those services.
Replacement of any transmitter component (crystal, semiconductor, etc.)
not authorized by the local government radio management departments
equipment authorization for this radio could violate the rules.
FCC Requirements:
• This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions:
(1) This device may not cause harmful interference, and
(2) this device must accept any interference received, including interference
that may cause undesired operation.
• 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 har-
mful interference to radio communications. However, there is no guarantee
that interference will not occur in a particular installation. If this equipment
Before using this radio, read this guide which contains
important operating instructions for safe usage and RF
energy awareness and control for compliance with
applicable standards and regulations.
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