Digital Keypad Transmitter
The MDTK digital keypad is one of Linearís MegaC ode
series of wireless radio controls designed for use with automatic garage door
and gate operators. The MegaCode radio format provides unparalleled security
with more than a million different codes.
operation, the user enters their unique code on the unitís keypad (1 to 6 digits
long) and presses the START/STOP button to activate the door operator. For up to
30 seconds after the last activation, the MDTK can be re-triggered by simply
pressing the START/STOP button again. This allows the user to stop or reverse
the opener quickly, without having to re-enter their code.
MDTK has built-in keypad lighting for use at night or in dark areas. By pressing
the START/STOP button first (or twice), before entering their code, the user can
light up the keypad. The clear silicone keys are backlit with a pleasing green
keypad lockout timer will disable the keypad after 10 activations. The keypad
must remain idle for 30 seconds before new attempts. Mega Code receivers are
programmed by sending a signal from the userís transmitters. This stores the
transmitterís code into the receiverís memory. The receiver will retain its
memory even without power and will only activate from these ďmemorizedĒ
transmitters. Each MDTK keypad code can be considered a different transmitter.
Each MegaCode receiver can remember a maximum of 10 transmitters (40 for gate
receivers). Any combination of portable transmitters and keypad codes up to the
maximum number can be entered.
STEP 1 Verify Receiver Installation. Be
sure the receiver is connected to the garage door operator as described in the
receiverís Installation Instructions. Apply power to the operator before
Program button and LED Location. Locate the program button and LED on the side
of this receiver case.
Program button and LED Location. Locate the program button and LED on the back
of the receiver case.
3 Program Receiver.
Enter a code (1-6 digits) on the keypad and momentarily press the receiverís
program button (channel one or two). The red programming LED will light if
thereís room in the receiverís memory for another transmitter or keypad code.
Press the START/STOP button to program the receiver. A transmitter must be
entered while the receiver LED is on. The LED stays on for about 5 seconds.
The LED will flicker when the receiver has accepted the transmitter.
NOTE: Be sure
to press the receiver program button for less than 2 seconds.
Door operator will not activate when the receiver is being programmed from the
transmitter, but the door operator will activate the next time the transmitter
is activated after programming.
programming LED also monitors radio signals entering the receiver. It is common
to see an occasional blink from the LED. The LED will also light when any
transmitter tuned to the receiverís frequency (programmed into the receiver or
not) is activated.
4 Add additional keypad codes.
Repeat Step 3 for each
keypad code required. Be sure to press the receiverís program button each
time a new code is entered. If the LED doesnít come on when the receiverís
program button is pressed, the receiverís memory is full. If required, use the
erase function (see INFO 2) to remove transmitters from the receiverís memory.
5 Review Memory.
Press and hold the
receiverís program button (channel one or two) until the LED begins to lash
(about 5 seconds) and then release the button. Count the number of flashes. The
number of flashes equals the number of transmitters and keypad codes programmed
into that channel of the receiver.
hold down the programming button longer than 5 seconds, the receiverís memory
for that channel will be erased.
6 Test receiver.
Be sure door area is clear.
Try each keypad code. The operator should activate when the START/STOP button is
pressed after entering a valid keypad code.
7 Mount Keypad.
Use the two screws and screw anchors provided to mount the keypad to the wall.
Be sure the keypad is at least five feet above the ground. After mounting the
keypad, cover the screw heads using the two plugs supplied.
INFO-1A Opening battery compartment.
The MDTK battery should last
up to 5 years with normal use. To remove the battery door to replace the
battery, remove the battery door retaining screws and slide the battery door
INFO-1B Replacing battery.
Remove the low battery and
replace it with a fresh 9-volt alkaline or lithium battery. Replace the battery
door and retaining screws.
INFO-2 Erasing receiver memory.
Transmitters may be erased from the receiverís memory by pressing and holding
the receiverís program button (channel one or two) for 5 seconds or more. After
the LED blinks (count of transmitters and keypad codes programmed) it will blink
one more time for channel one and twice for channel 2 as the receiverís memory
for that channel is erased. All transmitters for each receiver channel are
erased at the same time.
3 Operation keystrokes.
See the illustration for
examples of daytime and nighttime operation.
This product is warranted to the consumer against defects
in material and workmanship for one year from the date of purchase. This
warranty applies to first retail buyers of new devices. Warrantor will repair,
or at itís option, replace, any device it finds that requires service under this
warranty, and will return the repaired or replaced device to the consumer at the
warrantorís cost. For warranty service and shipping instructions contact
warrantor at the address shown below. Devices must be sent to warrantor for
service at ownerís expense. The remedies provided by this warranty are
exclusive. Implied warranties under state law are to the one-year period of this
written warranty. Some states do not allow limitations on how long an implied
warranty lasts, so the above limitation may not apply to you. In order to be
protected by this warranty, save your proof of purchase and send copy with
equipment should repair be required. This warranty gives you specific legal
rights, and you may also have other rights which vary from state to state.
All products returned for warranty service require a
Return Product Authorization Number (RPA#). Contact Linear Technical Services at
1-800-421-1587 for an RPA# and other important details.
Linear radio controls provide a reliable communications
link and fill an important need in portable wireless signaling. However there
are some limitations which must be observed.
For U.S. installations only: The radios are required to comply
with FCC Rules and Regulations as Part 15 devices. As such, they have limited
transmitter power and therefore limited range.
A receiver cannot respond to more than one transmitted signal at a
time and may be blocked by radio signals that occur on or near their operating
frequencies regardless of code settings.
Changes or modifications to the device may void FCC compliance.
Infrequently used radio links should be tested regularly to
protect against undetected interference or fault.
A general knowledge of radio and its vagaries should be gained
prior to acting as a wholesale distributor or dealer, and these facts should be
communicated to the ultimate users.