AUREL TX-8LAVSA01IA User manual

TX-8LAVSA01IA
Instruction Manual
Technical features are subject to change without notice. AUR°EL S.p.A does not feel responsible for any damage caused by the device’s misuse.
AUR°EL S.p.A. Via Foro dei Tigli, 4 -47015 Modigliana (FC) –ITALY Rev. A, 30-04-2002
Tel.: [phone] –Fax: [phone] Pag 1di 3
http://www.aurel.it -email: [email protected]
TX-8LAVSA01IA Transmitter
SAW Transmitter module with integrated antenna for utilisations with ON-OFF modulation, with digital data
of an RF carrier centred on 868.3 MHz. The power supply voltage ranges from 2.7 to 5V, typical 3V.
Pin-out
Connections
Pin 1-4-13 Ground Connected to external ground plane [see Fig. 2]
Pin 2 Input Mod. Data Input [0 to Vs]
Pin 15 +V Connected to power supply [+2.7 to 5V]
Technical features [ETS 300 220]
Description Min Typical Max Unity
Working frequency centre 868.3 MHz
Voltage supply (Vs) 2.7 35V
Absorbed Current 18 25 45 mA
RF output power (E.R.P.) +0 dBm
Modulation Frequency 3KHz
Input logic level 4.5 55.5 V
Operating temperature -20 +80 °C
Working temperature [ETS 300 220] -20 +55 °C
Dimensions 38.1 x 13.7 x 3 mm
The technical features have been obtained by applying the following testing system:
1
15
Fig.1
TX-8LAVSA01IA
+3 Vdc
power
supplier
Spectrum
analyzer
Square wave generator:
3KHz frequency
0
÷÷
5V Out Level RF 50
ΩΩ
Input
Pin 2
Pin 11
50
ΩΩ
coaxial
cable
connection

TX-8LAVSA01IA
Instruction Manual
Technical features are subject to change without notice. AUR°EL S.p.A does not feel responsible for any damage caused by the device’s misuse.
AUR°EL S.p.A. Via Foro dei Tigli, 4 -47015 Modigliana (FC) –ITALY Rev. A, 30-04-2002
Tel.: [phone] –Fax: [phone] Pag 2di 3
http://www.aurel.it -email: [email protected]
Device usage
In order to obtain the performances described in the technical specifications and to comply with the
operating conditions which characterize the Certification, the transmitter has to be mounted on a printed
circuit, and keep into consideration what follows:
3V dc supply
1. The transmitter must be supplied by a very low voltage source, safetly protected against short circuits.
2. Maximum voltage variations allowed: ± 0,25 V.
3. De-coupling, next to the transmitter, by means of a minimum 100.000 pF ceramic capacitor.
Ground
1. It must surround at the best the welded area of the transmitter. The circuit must be double layer, with
throughout vias to the ground planes, approximately each 15 mm.
2. It must be properly dimensioned, especially in the antenna connection area, in case a radiating whip
antenna is fitted in it (an area of approximately 50 mm radius is suggested).
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.
It must be kept 2 mm away from the ground circuit on the same side.
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

TX-8LAVSA01IA
Instruction Manual
Technical features are subject to change without notice. AUR°EL S.p.A does not feel responsible for any damage caused by the device’s misuse.
AUR°EL S.p.A. Via Foro dei Tigli, 4 -47015 Modigliana (FC) –ITALY Rev. A, 30-04-2002
Tel.: [phone] –Fax: [phone] Pag 3di 3
http://www.aurel.it -email: [email protected]
1. A whip antenna, 16,5 mm long and approximately 1 mm dia, brass or copper wire made, must be
connected to the RF output of the transmitter (pin 11), (see fig. 2).
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 vertically or horizontally, provided that a good ground plane surrounds the
connection point between antenna and transmitter output.
N.B:As an alternative to the a.m. antenna it is possible to utilize the whip model manufactured by
AUR°EL (see related Data Sheet and Application Notes).
By fitting whips too different from the described ones, the EC Certification is not assured.
Other components
1. Keep the transmitter 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. Keep them at least at 5 mm distance.
4. If the Antenna Connection is directly used for a radiating whip connection, keep at least 5 cm radius free
area. In case a 50 Ωimpedance coaxial cable is connected, then 5 mm radius will suffice.
Reference Rules
The TX-8LAVSA01IA transmitter complies with the EU Rules ETS 300-220, with a 5V max. supply. The
equipment has been tested according to rule EN 60950 and it can be utilized inside a special insulated
housing that assures its compliance with the above mentioned rule. The transmitter must be supplied by a
very low voltage source, safely protected against short circuits.
The use of the transmitter module is foreseen inside housings that assure the overcoming of the rules EN
61000 not directly applicable to the module itself. In particular, it is left at the User’s care, the insulation of
the external antenna connection, and of the antenna itself, since the RF output of the transmitter is not built
to directly bear the electrostatic charges foreseen by the EN 61000-4-2rules.
CEPT 70-03 Recommendation
In order to comply with such rule, the device must be used only for a 10% of an hourly duty-cycle, (that
means 6 minutes of utilisation over 60). The device utilisation inside the italian territory is governed by the
Codice Postale and Telecomunicazioni rules in force (art. no. 334 and subsequents).