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Genesis FM Transmitter Module
GT2
General Description
’Wireless Connector’
The Genesis GT2 ’wireless connector’ transmitter
module offers narrow band VHF modules for
operation in the various license exempt bands
allocated to narrow band application.
Utilising narrow band RF technology, the Genesis FM
transmitter is iniatially available on four separate
channels and offering 10mW RF output power.
Genesis narrow-band RF technology provides the
best possible achievable range and reliability of
operation.
Packaged in a miniature 32 x 10mm fully shielded
enclosure and operating from 3v or 5v supplies,
Genesis transmitters have retained the industry
standard footprints.
This means that coupled with the corresponding
receiver which has an intelligent data slicer, Genesis
modules can certainly be incorpoprated into both new
and existing designs where better performance or
competitive pricing is required.
Compatible Receiver Modules

GENESIS R2 (GR2)
Applications
 REMOTE CONTROL FOR CRANES ETC
 WIRELESS MONITORING
 DISPERSED ALARM APPLICATIONS
 DOMESTIC AND COMMERCIAL SECURITY
WIRELESS TELEMETRY
Features
 MINIATURE SIL PACKAGE
 10mW RF OUTPUT POWER
 DATA RATES UP TO 4800 BITS/S
 NARROW BAND CRYSTAL TECHNOLOGY
 COMMON GENESIS FOOTPRINT – CHOOSE




AVAILABLE ON 173.225 & 172.250, 152.650
and 151.30 MHz
OTHER CHANNELS AVAILABLE ON
REQUEST
SINGLE 3 & 5 VOLT SUPPLY
EN 300-220-1 compliant module
BETWEEN 100 TO 1000 MHz OPERATION
Version 1.0
Advancing radio solutions from 100 to 1000 MHz
We supply quality transmitters, receivers and transceivers
Page 1 of 5
Genesis FM Transmitter Module
GT2
Absolute Maximum Ratings: Transmitter
Operating temperature:
Storage temperature:
-10C to +55C
-40C to +100C
Supply Voltage (pin 3)
Data input (pin 5)
5.5V
5.5V
Electrical Characteristics: Parameters measured at 250C
DC LEVELS
Supply voltage
pin
min.
Typ.
max.
units
notes
3
4.5
5.0
5.5
Volts
10
mA
mA
mW
1
1
1
2
2
4
dBm
dBm
Hz
KHz
KHz
1
ms
Current & RF POWER
173.225 MHz (Applies to all channels)
Supply current @ VCC = 5V
Supply current @ Vcc = 3V (3v module)
RF power 5v module
RF power 3v module
3
3
2
2
RF & Data
2nd harmonic
Harmonics @ > 1GHz
Initial frequency accuracy
Frequency accuracy over full temp range
FM deviation of RF carrier
-40
-50
25
1.8
Power up time to full RF
Data rate
Data pulse width
Note 1:
2:
5
200
kbits/s
s
measured into a 50 impedance
the limit for the European spec EN 300 220 is –36dBm
Version 1.0
Advancing radio solutions from 100 to 1000 MHz
We supply quality transmitters, receivers and transceivers
Page 2 of 5
Genesis FM Transmitter Module
GT2
Connection Details
1
2
3
4
5
Figure 1: Genesis Transmitter
Pin Description:
RF GND (pin 1)
RF ground pin, internally connected to pin 4 (0V).
This pin should ideally be connected to the nearest
ground plane (e.g. coax braid, main PCB ground
plane etc.)
RF OUT (pin2)
50 RF antenna output. To achieve best results the
antenna impedance must match that of the module.
VCC (pin 3)
+Ve supply pin. The module will generate RF when
VCC is present.
GND (pin 4)
Supply and data ground connection, connected to pin
1.
Data IN (pin 5)
This input has an impedance of 47K and should
ideally be driven by a CMOS logic drive or
compatible.
Version 1.0
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We supply quality transmitters, receivers and transceivers
Page 3 of 5
Genesis FM Transmitter Module
GT2
Application Information
Application Circuit
Antenna Design
The application circuit shows how the Genesis
transmitter can easily be integrated into a system to form
a wireless link
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.
ANTENNA
+5V
+5V
1
1
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.
GT2
2
3
4
5
6
7
8
9
A0
VDD
A1
DOUT
A2
OSC1
A3
OSC2
A4
TE\
A5
AD11
A6
AD10
A7
AD9
VSS
AD8
2
3
4
5
18
17
16
ROSC
15
14
13
12
11
10
HT12E
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 receive 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 (43cm @
173 MHz). Further range may be achieved if the ¼
wave antenna is placed perpendicular in the middle
of a solid earth plane measuring at least 50cm radius.
In this case, the antenna should be connected to the
module via some 50 ohm characteristic impedance
coax
Figure 3: MK Transmitter Application Circuit
Evaluation Kit
An evaluation kit is available to rapidly asses the full
capabilities of these modules – see data sheet EVK1.
Helical Antenna
RF
110mm @ 173MHz
38 turns equally spaced
 = 8mm (inside)
Whip Antenna
RF
43cm @ 173MHz
Figure 2: Antenna Configurations To Be Used
With The Genesis Transmitter Modules
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Genesis FM Transmitter Module
GT2
Mechanical Dimensions
3mm
32mm
10.5mm
GT1
pin spacing 2.54mm
1
2
3
4
5
20.32mm
Figure 4: Genesis Transmitter
Ordering Information
Standard Product;
Part No
GT2 –XXX.XXX-5v
GT2 –XXX.XXX-3v
Description
5v Transmitter XXX.XXX MHz
3v Transmitter XXX.XXX MHz
XXX.XXX- specify frequency
Please consult our sales department for further information.
Distributed in Australia, Asia & South Pacific by:
M.K.Consultants (UK) Ltd
288a-290 Quenns Road
HALIFAX
West Yorkshire
HX1 4NS
England
Telelink Communications
P.O. Box 5457, North Rockhampton
Queensland 4702, Australia
Phone: 61 7 49340413
FAX: 61 7 49340311
Email: [email protected]
WEB: www.telelink.com.au
Tel +44 (0) 1422 321216
Fax +44 (0) 1422 353153
Email:
Web
[email protected]
www.mkconsultants.co.uk
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.
In addition, we do not imply warranty or fitness for any particular application especially life support applications.
Version 1.0
Advancing radio solutions from 100 to 1000 MHz
We supply quality transmitters, receivers and transceivers
Page 5 of 5