AM Transmitter Module
MKT1-XXX
Features
MINIATURE TWO PIN PACKAGE
SAW RESONATOR 100% AM MODULATION
DATA RATES UP TO 2400 BITS/S
OPTIMAL RANGE 100m (433.92 MHz Version)
315 / 318 / 433.92 / 868.35 & 916.5 MHz
VERSIONS
CMOS/TTL COMPATIBLE INPUT
LOW CURRENT CONSUMPTION (typ. 5mA)
SINGLE SUPPLY VOLTAGE 1.5 – 13V
Applications
VEHICLE ALARM SYSTEMS
REMOTE GATE CONTROLS
GARAGE DOOR OPENERS
DOMESTIC AND COMMERCIAL SECURITY
Compatible Receiver Modules
MKR1-XXX (see data sheet MKR1)
MKR2AM-XXX (data sheet MKR2AM)
MKR5A-XXX (highest spec AM receiver)
General Description
The MKT1-XXX miniature transmitter UHF radio
module enables the implementation of a simple
telemetry link at data rates of up to 2400 bit/s when
used with one of the compatible MK receiver
modules.
Available for operation at all world frequencies these
modules are able to transmit at distances of up to
100m.
The MKT1-XXX module will suit one-to-one and
multi-node wireless links in applications including
building and car security and remote control
applications. Because of its small size and low
power requirements, the module is ideal for use in
portable battery powered wireless applications.
Version 3.0
AM or FM Low Power Radio Modules for 100 to 1000 MHz
Designers and Manufactueres of Quality Transmitters, Receivers and Transceivers
Page 1 of 4
AM Transmitter Module
MKT1-XXX
Absolute Maximum Ratings: Transmitter
Operating temperature:
Storage temperature:
Supply Voltage (pin 1)
Data input (pin 1)
-20 C to +55 C
-40 C to +85 C
15V
15V
Electrical Characteristics: Transmitter
pin
DC LEVELS
Supply voltage
Current & RF POWER
For supply 7 to 13 volts:-
Supply current @ Rd = 1.0K (data high)
RF power into 50 @ Rd = 1K
For supply 1.5 to 3.7 volts:-
Supply current @ Rd = 51 (data high)
RF power into 50 @ Rd = 51
Note, above values apply to all frequencies
RF & Data
Data rate @ rf<500 MHz
min.
1.5
typ.
5.0
max.
13
units
Volts
notes
6
2
8.2
4
9
6
mA
dBm
433MHz
4
-4
7
0
mA
dBm
433 Hz
100
2400
bits/s
Version 3.0
AM or FM Low Power Radio Modules for 100 to 1000 MHz
Designers and Manufactueres of Quality Transmitters, Receivers and Transceivers
Page 2 of 4
AM Transmitter Module
MKT1-XXX
Connection Details
Component
Side
Application Information
Antenna Design
The design and positioning of the antenna is as crucial
as the module performance itself in achieving a good
wireless system range. The following will assist the
designer in maximising system performance.
The antenna should be kept as far away from sources of
electrical interference as physically possible. If
necessary, additional power line decoupling capacitors
should be placed close to the module.
The antenna ‘hot end’ should be kept clear of any
objects, especially any metal as this can severely restrict
the efficiency of the antenna to transmit power. Any
earth planes restricting the radiation path to the antenna
will also have the same effect.
Best range is achieved with either a straight piece of
wire, rod or PCB track @ ¼ wavelength (15.5cm @
433.92MHz). Further range may be achieved if the ¼
wave antenna is placed perpendicular in the middle of a
solid earth plane measuring at least 16cm radius. In this
case, the antenna should be connected to the module via
some 50 ohm characteristic impedance coax.
Loop Antenna
MKT1
Transmitter
1
2
Figure 1: MKT1 Transmitter
Pin Description
Data
(pin 1)
CMOS/TTL compatible input. Must be driven with
appropriate current limiting resistor to provide the
module with 5mA.
GND
(pin2)
Ground connection, preferably connected to a solid
ground plane.
General Information
The MKT1-XXX requires a current limiting resistor
(Rd) to source the module with the correct drive
current. The following values of Rd can be used with
the module depending on the drive voltage:
Drive Voltage = 1.5 –3.7V then Rd = 51 to 300
Drive Voltage = 7 – 13 V then Rd = 1K0 typical
Loop Antenna Area
600mm
2
PIN 1
PIN 2
C1
ANTENNA
Signal From
Encoder
drive current
Rd
1
MKT1
C1 = 2.2pF @ 418MHz
C1 = 1pF @ 433MHz
2
drive
voltage
220pF
Whip Antenna
PIN 1
15.5cm @ 433MHz
Figure 2: Drive Circuit Required For MKT1
Transmitter Module
Figure 3: Antenna Configurations To Be Used With
The MKT1 Transmitter Module
Version 3.0
AM or FM Low Power Radio Modules for 100 to 1000 MHz
Designers and Manufactueres of Quality Transmitters, Receivers and Transceivers
Page 3 of 4
AM Transmitter Module
MKT1-XXX
Mechanical Dimensions
10mm
3.5mm
14mm
MKT1
Transmitter
1
2
5.08mm
Figure 4: MKT1 Transmitter
Ordering Information
Standard Product;
Part No
MKT1-434
MKT1-868
MKT1-916
Description
AM Two Pin Transmitter 433.92MHz
AM Two Pin Transmitter 868.35 MHz
AM Two Pin Transmitter 916.5 MHz
Please consult our sales department for further information.
M.K.Consultants (UK) Ltd
288a-290 Quenns Road
HALIFAX
West Yorkshire
HX1 4NS
England
Tel +44 (0) 1422 329002
Fax +44 (0) 1422 353153
Email:
Web
Disclaimer
MKConsultants have a policy to continually improve the reliability and performance of their products. We therefore reserve the right to
upgrade our products performance without notice.
Although the data contained herewidth is believed to be accurate, however we do not assume any responsibility whatsoever for errors
or omissions this document may contain.
admin@mkconsultants.eu
www.mkconsultants.eu
In addition, we do not imply warranty or fitness for any particular application especially life support
applications.
Version 3.0
AM or FM Low Power Radio Modules for 100 to 1000 MHz
Designers and Manufactueres of Quality Transmitters, Receivers and Transceivers
Page 4 of 4
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