BC-NBK Instruction Manual BC-NBK Receiver Digital RF receiver, thick-film technology, with high sensitivity, low consumption and low antenna radiation. Pin-out Lot (Week/Year) Code 15 1 Connections Pin 2-7-11 Pin 3 Pin 1-15 Pin 13 Ground Antenna +V Test Point Pin 14 Data Out. GND Connections: Internally connected to a single ground plate. 50 impedence, antenna connection Connection to the positive pole of supply (+5V 10%) Analog output of the demodulated signal. By connecting an oscillograph, the entity and quality of the received RF signal can be seen. Receiver digital output. Apply loads over 1 K Technical Features Min Working centre frequency Voltage supply Absorbed current RF sensitivity RF passband at -3dB Output square wave Output low logic level Output high logic level RF spurious emissions in antenna Switch-on time Working temperature Dimensions 4.5 Typical 433.92 5 2,7 -97 2.4 2 Max 5.5 3 0.1 3.8 -65 -20 -60 2 +80 38.1 x 13.7 x 5.5 mm Unity MHz V mA dBm MHz KHz V V dBm s C Remarks See note 1 See note 4 See note 4 See note 2 See note 3 See Fig. 5 Note1: Values have been obtained by applying the test system as per Fig. 1. Note2: The R.F. emission measure has been obtained by connecting the spectrum analyser directly to RX's 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 10K maximum load applied. BC-NBK module was previously BZT approved by mean of Test Report obtained c/o the laboratory: ISPT LAB RADIO - viale Europa 190, 00144 Roma. Technical features are subject to change without notice. AUREL S.p.A does not assume responsibilities for any damage caused by the device's misuse. AUREL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) - ITALY Tel.: +390546941124 - Fax: +390546941660 http://www.aurel.it - email: aurel@aurel.it Rev. A, 19-09-2001 Pag 1 of 4 BC-NBK Instruction Manual The declared technical features have been obtained by applying the following test system: Fig. 1 RF Generator: frequency: 433.92 MHz Out Level -85dBm Rx BC-NBK Pin 3 Digital Encoder MC 145026 Modulator OOK (-2dB) Pin 14 Decoder MC 145028 Code Validation Attenuator -10dB 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 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: 0,5 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 welding 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. 3 Suggested lay-out for the device correct usage. Technical features are subject to change without notice. AUREL S.p.A does not assume responsibilities for any damage caused by the device's misuse. AUREL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) - ITALY Tel.: +390546941124 - Fax: +390546941660 http://www.aurel.it - email: aurel@aurel.it Rev. A, 19-09-2001 Pag 2 of 4 BC-NBK Instruction Manual 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 coaxial cable. Be sure that the braid is welded to the ground in a close point. Antenna 1. A whip antenna, 16.5 cm 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 both vertically or horizontally, provided that the connection point between antenna and receiver input, is surrounded by a good ground plane. N.B: As an alternative to the a.m. antenna it is possible to utilize the whip model manufactured by AUREL (see related Data Sheet and Application Notes). By fitting whips too different from the described ones, the EEC Certification is not assured. 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 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 BC-NBK receiver is EEC certified and in particular it complies with the European Rules EN 300 220-3, and EN 301 489-3 for class 3. 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 source, safety protected against short circuits. The use of the receiver module is foreseen inside housings that assure the overcoming of the rule EN 61000-4-2 not 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. rules. Technical features are subject to change without notice. AUREL S.p.A does not assume responsibilities for any damage caused by the device's misuse. AUREL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) - ITALY Tel.: +390546941124 - Fax: +390546941660 http://www.aurel.it - email: aurel@aurel.it Rev. A, 19-09-2001 Pag 3 of 4 BC-NBK Instruction Manual Reference curves Fig.4 Frequency-Selectivity 0 -10 Selectivity [dB] -20 -30 -40 -50 -60 -70 410 414 418 422 426 430 434 438 442 446 450 454 458 Frequency [MHz] The curve has been obtained by the test system shown in Fig.1 Fig.5 Temperature-sensibility variation 0,5 Gain loss [dB] 0 -0,5 -1 -1,5 -2 -2,5 -3 -20 -10 0 10 20 30 40 50 60 70 80 Temperature [C] 5V supply, RF input 433,92MHz, -95dBm Technical features are subject to change without notice. AUREL S.p.A does not assume responsibilities for any damage caused by the device's misuse. AUREL S.p.A. Via Foro dei Tigli, 4 - 47015 Modigliana (FC) - ITALY Tel.: +390546941124 - Fax: +390546941660 http://www.aurel.it - email: aurel@aurel.it Rev. A, 19-09-2001 Pag 4 of 4