AUREL RX-8L50SA70SF User manual

RX-8L50SA70SF
Instruction Manual
The technical features are subject to change without notice. AUREL S.p.A. does not assume responsibilities for any damages caused by the device’s misuse
AUREL S.p.A. Via Foro dei Tigli, 4 -47015 Modigliana (FC) –ITALY Rev. A, February 1st 2002
Tel.: [phone] –Fax: [phone] Pag 1of 4
http://www.aurel.it -email: [email protected]
RX-8L50SA70SF Receiver
RF superheterodyne digital data receiver, OOK (On-Off Keying) modulated, operating at the 868,3MHz
frequency, with high sensitivity, selectivity and immunity to electromagnete interfering fields.
Pin-out
Connections
Pin 1 +V Preamp. Connection to the +5V ±5% supply positive pole
Pin 2-7-11 Ground GND Connections: Internally connected to a single ground plate
Pin 3 Antenna 50Ωimpedence antenna connection
Pin 13 Test Point Analog output of the demodulated signal. By connecting an oscillograph
the entity and quality of the received RF signal can be seen.
Pin 14 Data Out. Receiver digital output. Apply loads over 10 KΩ
Pin 15 +V Connection to the +5V ±5% supply positive pole
Technical features
Min Typical Max Unity Remarks
Working centre frequency 868.3 MHz
Voltage supply Vs 4.75 5 5.25 V
Absorbed current 79mA
RF sensitivity -98 -100 -104 dBm See note 1
RF passband at –3dB 600 KHz
IF passband at –3dB 300 KHz
Output square wave 3KHz
Output high logic level Vs-1.2 VSee note 4
Output high logic level Gnd VSee note 4
RF spurious emissions in antenna -80 dBm See note 2
Switch-on time 0.2 sSee note 3
Working temperature -20 +80 °CSee Fig.4
Dimensions 44.95 x 17.51 x 9.3 mm
Note1: Values have been obtained by applying the test system as per Fig. 1.
Note2: The RF emission measure has been obtained by connecting the spectrum analyser directly to RX Pin 3.
Note3: By switch-on time is meant the time required by the receiver to acquire the declared characteristics from the very moment the
power supply is applied.
Note4: Values obtained with 10KΩmaximum load applied.
The technical tests and reports have been carried out and obtained by the laboratories of :
Messrs PRIMA RICERCA & SVILUPPO –via Campagna, 58 –22020 Gaggino Faloppio (CO) -Italy
1
15
Lot (Week/Year)
Code

RX-8L50SA70SF
Instruction Manual
The technical features are subject to change without notice. AUREL S.p.A. does not assume responsibilities for any damages caused by the device’s misuse.
AUREL S.p.A. Via Foro dei Tigli, 4 -47015 Modigliana (FC) –ITALY Rev. A, February 1st 2002
Tel.: [phone] –Fax: [phone] Pag 2of 4
http://www.aurel.it -email: [email protected]
The declaired technical features have been verified by applying the following test system:
Device usage
In order to take advantage of the performances described in the technical specifications and to comply with
the operating conditions which characterize the Certification, the receiver has to be fitted on a printed
circuit, considering what follows:
5 V dc supply:
1. The receiver must be supplied by a very low voltage source, safety protected against short circuits.
2. Maximum voltage variations allowed: ± 0,25 V.
3. De-coupling, next to the receiver, by means of a minimum 100.000 pF. ceramic capacitor.
Ground:
1. It must surround at the best the welded area of the receiver. The circuit must be double layer, with
throughout vias to the ground planes, approximately each 15 mm.
2. It must be properly dimensioned, specially in the antenna connection area, in case a radiating whip
antenna is fitted in it (an area of approximately 50 mm radius is suggested.)
Fig.2 Suggested lay-out for the device correct
usage
Fig. 1
MC 145026
digital encoder
OOK [-2dB]
Modulator
-10dB
Dumper
RF Generator: 868.3 MHz frequency
–88dBm Out Level
8L50SA70SF
Rx
MC 145028
Decoder
Pin 3
Pin 14
Code
Validation

RX-8L50SA70SF
Instruction Manual
The technical features are subject to change without notice. AUREL S.p.A. does not assume responsibilities for any damages caused by the device’s misuse.
AUREL S.p.A. Via Foro dei Tigli, 4 -47015 Modigliana (FC) –ITALY Rev. A, February 1st 2002
Tel.: [phone] –Fax: [phone] Pag 3of 4
http://www.aurel.it -email: [email protected]
50 Ohm line:
1. It must be the shortest as possible.
2. 1,8 mm wide for 1 mm thick FR4 printed circuits and 2,9 mm wide for 1,6 mm thick FR4 printed circuits.
On the same side, it must be kept 2 mm away from the ground circuit.
3. On the opposite side a ground circuit area must be present.
Antenna connection:
1. It may be utilized as the direct connection point for the radiating whip antenna.
2. It can bear the connection of the central wire of a 50 Ωcoaxial cable. Be sure that the braid is welded to
the ground in a close point.
Antenna
1. A whip antenna, 8,5 mm long and approximately 1 mm dia, brass or copper wire made, must be
connected to the RF input of the receiver.
2. The antenna body must be keep straight as much as possible and it must be free from other circuits or
metal parts (5 cm minimum suggested distance.)
3. It can be utilized either vertical or horizontal, provided the connection point between antenna and
receiver input, is surrounded by a good ground plane.
Other components:
1. Keep the receiver separate from all other components of the circuit (more than 5 mm).
2. Keep particularly far away and shielded all microprocessors and their clock circuits.
3. Do not fit components around the 50 Ohm line. At least keep them at 5 mm distance.
4. If the Antenna Connection is directly used for a radiating whip antenna connection, keep at least a 5 cm
radius free area. In case of coaxial cable connection then 5 mm radius will suffice.
Reference Rules
The RX-8L50SA70SF receiver is EC certified and in particular it complies with the European Rules EN 300
220-3 for class 2, and EN 300 683 for class 1. The equipment has been tested according to rule EN
60950 and it can be utilized inside a special insulated housing that assures the compliance with the above
mentioned rule. The receiver must be supplied by a very low voltage safety source protected against short
circuits The use of the receiver module is foreseen inside housings that assure the overcoming of the rule
EN 61000-4-2not directly applicable to the module itself. In particular, it is at the user’ s care the
insulation of the external antenna connection, and of the antenna itself since the RF output of the receiver is
not built to directly bear the electrostatic charges foreseen by the a.m. rule.

RX-8L50SA70SF
Instruction Manual
The technical features are subject to change without notice. AUREL S.p.A. does not assume responsibilities for any damages caused by the device’s misuse.
AUREL S.p.A. Via Foro dei Tigli, 4 -47015 Modigliana (FC) –ITALY Rev. A, February 1st 2002
Tel.: [phone] –Fax: [phone] Pag 4of 4
http://www.aurel.it -email: [email protected]
Reference curves
Fig.4 Temperature-Work frequency variation curve
-2,5
-2
-1,5
-1
-0,5
0
0,5
-20 -10 0 10 20 30 40 50 60 70 80
Temperature [°C]
Work frequency [MHz]
The curve has been obtained bt the test system
shown in Fig.1.
5V supply, RF 868,3 MHz, -100dBm input
Fig.3 Frequence-Selectivity curve
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
866,5 867,1 867,7 868,3 868,9 869,5 870,1
Frequency [MHz]
Selectivity [dB]