Radio Transmitter & Receiver Modules
T6 / R6
Features
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Miniature SIL Package
Fully Shielded
Data Rates Up To 64kbits/S
Range upto 200 Metres
Single Supply Voltage
Industry Pin Compatible
QFMT6-XXX
Description
The QFMT6 AND QFMR6 miniature UHF radio
modules enable the implementation of a reliable
telemetry link at data rates of up to 64 Kbits/s.
The QFMT6 is based on a classical phase lock loop
using a crystal reference oscillator. This results in an
accurately controlled RF output in the frequency
domain. A significant advantage of this is that narrow
filtering can then be used in the receiver, which
results in high interference immunity.
In addition, the modules are fitted with an on-board
voltage regulator which enhances performance from
improved supply filtering and also ensures a constant
RF output level.
The QFMR6 is based on the single conversion
superhet principle utilising a crystal based phase lock
loop for accurate generation of the local oscillator.
This allows use of high Q bandpass filters resulting in
good adjacent channel selectivity and high
interference immunity.
The QFMT6 and QFMR6 modules will suit one-to-one
and multi-node wireless links in applications including
building and car security, remote industrial process
monitoring and computer networking.
Because of its small size and low power
requirements, these modules are ideal for use in
portable battery powered wireless applications.
These modules may be used within areas of high
interference, or ‘radio traffic’. Due to the design, they
provide a highly reliable radio link.
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Temp range –20°c + 55°c
European Versions;
868.4 MHz for 10% duty cycle band
869.85 MHz for 100% duty cycle band
American version;
915.0MHz
Bandwidth Efficient PLL technology
QFMR6-XXX
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Single conversion FM superheteodyne using RF
SAW and ceramic IF filtering at 10.7 MHz
Image rejection 60dB
Analogue, digital outputs
Signal strength output (RSSI)
Incorporates AGC for improved dynamic range
Dynamic range better than 120dB
Single 5V supply
Applications
Vehicle Alarm Systems
Remote Gate Controls
Garage Door Openers
Domestic And Commercial Security
DS306-3
May 03
2003
REG No 277 4001, England.
Page 1
Radio Transmitter & Receiver Modules
Connection Diagram / Dimensions QFMT6 Transmitter
3.4 mm
31.5 mm
T6 / R6
CE
10 mm
T6
(Pin spacings 2.54 mm)
19.57 mm
1
2
3
4
5
1.5mm
Pin Descriptions
RF GND
(pin 1)
RF Ground pin is internally connected to pin 4 (0V) This pin should ideally be connected to the nearest
ground plane (e.g. coax braid, main PCB ground plate etc.)
RF OUT
(pin 2)
50Ω RF antenna output. To achieve best results the antenna impedance must match that of the module.
V
CC
(pin 3)
+Ve supply pin (3.0 to 9.0 volts). The module will generate RF when V
CC
is present. It is strongly
recommended that a 100nF capacitor decouples the supply rail as close as possible to this pin.
GND
(pin 4)
Supply and data ground connection, connected to pin 1.
Data IN
(pin 5)
This input has an impedance of 47KΩ and should ideally be driven by a CMOS logic drive or compatible.
The drive circuitry should be supplied with the same supply voltage as the Tx module.
Ordering Information:
Part No
T6-8684-20
T6-8684-64
T6-86985
T6-915-20
T6-915-64
Description
SIL Transmitter 868.4MHz 20Kbps Data rate
SIL Transmitter 868.4MHz 64Kbps Data rate
SIL Transmitter 869.85 MHz
SIL Transmitter 915.0 MHz 20Kbps Data rate
SIL Transmitter 915.0 MHz 64Kbps Data rate
DS306-3
May 03
2003
REG No 277 4001, England.
Page 2
Radio Transmitter & Receiver Modules
Absolute Maximum Ratings: Transmitter QFMT6
Operating temperature: -20°C to +55°C
Storage temperature: -40°C to +100°C
Supply Voltage (pin 3)
Data input (pin 5)
10V
10V
T6 / R6
Electrical Characteristics: Transmitter QFMT6
Pin
Supply voltage
Current & RF POWER
Min.
2.3
typ.
5.0
Max.
10.0
units
Volts
notes
3
868.40 MHz
Supply current @ V
CC
= 5V
RF power
RF & Data
3
2
7
1
-50
-50
±10
35
10
100
15
64000
mA
mW
dBm
dBm
KHz
KHz
mS
bits/s
µs
1
1
2
2
2
nd
harmonic
Harmonics @ > 1GHz
Initial frequency accuracy
Modulation bandwidth @ -3dB
Power up time to full RF
Data rate
Data pulse width
Notes
1.
Measured into a 50Ω impedance a 10mW version is planned for production
2.
The limit for the European spec EN 300 220 is –36dBm
DS306-3
May 03
2003
REG No 277 4001, England.
Page 3
Radio Transmitter & Receiver Modules
Connection Diagram / Dimensions QFMR6 Receiver
T6 / R6
4.5 mm
49.05 mm
CE
17 mm
R6
(Pin spacings 2.54 mm)
1.5mm
31 mm
1
2
3 4
5 6
7
Pin Descriptions
RF IN (pin 1)
50Ω RF input from antenna, connect using shortest possible route. This input is isolated from the internal
circuit using the air gap of the front end SAW RF filter
RF GND (pin 2)
RF ground connection, preferable connected to a solid plane.
RSSI / Carrier Detect (pin 3)
The Received Signal Strength Indicator provides a DC output voltage proportional to the RF input signal. The
amplitude of the RSSI voltage increases with increasing RF signal strength. A simple transistor interface can
yield a carrier detect logic output.
GND (pin 4)
Connect to power supply ground.
V
CC
(pin 5)
+Ve supply pin. Operation from a 5V supply able to source6mA at less than V
p-p
ripple.
AF (pin 6)
Audio frequency output. (max 40uA source)
DATA OUT (pin 7)
CMOS compatible output. This may be used to drive external decoders. To reduce any noise on this output
add a 56pF cap from this pin to GND.
Ordering Information:
Part No
R6-8684-20
R6-8684-64
R6-86985
R6-915-20
R6-915-64
Description
SIL Receiver 868.40 MHz 20Kbps Data rate
SIL Receiver 868.40 MHz 64Kbps Data rate
SIL Receiver 869.85 MHz
SIL Receiver 915 MHz
20Kbps Data rate
SIL Receiver 915 MHz
64Kbps Data rate
DS306-3
May 03
2003
REG No 277 4001, England.
Page 4
Radio Transmitter & Receiver Modules
Absolute Maximum Ratings: Receiver QFMR6
Operating temperature: -10°C to +55°C
-40°C to 80°C option available
Storage temperature: -40°C to +100°C
Supply Voltage (pin 5)
RF Input (pin 1)
7V
+20dBm (100mw)
T6 / R6
Electrical Characteristics: Receiver QFMR6 (20 Kbits/s version)
min.
Supply voltage
Supply current
Supply ripple
Data output high
Data output low
RF
typ.
5.0
6
=>4.0
<=0.5
-103
230
±10
20
<60
<60
<60
60
Max.
5.5
10
units
V
MA
mV
p-p
V
V
dBm
KHz
KHz
dBm
dB
dBm
dBm
dB
notes
4.5
RF sensitivity
IF Bandwidth
Initial signal accuracy
Max. RF input
E.M.C
1
Spurious responses upto 1GHz
LO leakage, conducted
LO leakage, radiated
Image rejection
Dynamic Timings
Power up to stable data
(With RF signal present)
Signal to stable data
(With power supply already on)
Power up to valid RSSI
(With RF signal present)
Mark : space ratio
Bit rate
6
5
1
50
100
20000
mS
mS
mS
%
bps
2
2
2
Notes
1.
IF bandwidth available down to 27KHz.
2.
Timings are to be confirmed
DS306-3
May 03
2003
REG No 277 4001, England.
Page 5
FPGA/CPLD
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