|
|
PDF BIM-418-40 Data sheet ( Hoja de datos )
| Número de pieza | BIM-418-40 | |
| Descripción | (BIM-418-40 / BIM-433-40) Low Power UHF Data Transceiver Module | |
| Fabricantes | Radiometrix | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de BIM-418-40 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
|
No Preview Available !
Radiometrix
www.DataSheet4U.com
Hartcran House, Gibbs Couch, Watford, WD19 5EZ, England
Issue 3, 13 July 2001
Tel: +44 (0) 20 8428 1220, Fax: +44 (0) 20 8428 1221
BiM-UHF
Low Power UHF Data Transceiver Module
UK Version - BiM-418-40
Euro Version - BiM-433-40
The BiM-418-40 and BiM-433-40 are
miniature UHF radio modules
capable of half duplex data
transmission at speeds upto 40 Kbit/s
over distances of 30 metres "in-
building" and 120 metres open ground
Features
Miniature PCB Mounting module
Licence Exempt operation in UK on 418MHz, MPT 1340 (BiM-418-40)
ETS 300-220 tested for European use on 433.92 MHz (BiM-433-40)
SAW controlled FM transmission at -6dBm ERP.
Double conversion Superhet receiver
-107dBm receive sensitivity
Single 4.5 to 5.5V supply < 15mA (tx or rx)
Half duplex data at upto 40 kbit/s
Reliable 30 metre in-building range
Direct interface to 5V CMOS logic
Fast 1ms power up enable for duty cycle power saving
On board data slicer, supply switches and antenna change over.
BiM-UHF transceiver
The module integrates a low power UHF FM transmitter and matching superhet receiver together with
the data recovery and TX/RX change over circuits to provide a low cost solution to implementing a Bi-
directional short range radio data link. The high data rates (upto 40kbit/s) and fast TX/RX changeover
(<1ms) make the BiM transceiver ideal for high integrity one to one links / multi-node packet switch
networks. Rapid RX power up ( <1ms ) allows effective duty cycle power saving of the receiver for
battery powered applications
(e.g. 15µA average @ 1ms ON : 1sec OFF).
Typical applications :-
Medium speed computer networks
Laptop > PC > printer links
High integrity wireless Fire / Security alarms
Building environment control / monitoring
Vehicle alarm systems
Remote meter reading
Authorisation / Access control
Radiometrix Ltd, BiM Data Sheet
page 1
1 page  
Performance Data
ambient temperature: 20 °C
supply voltage:
+ 5.0 V, unless noted otherwise
Data applies to all frequency versions, except where noted
www.DataSheet4U.com
Parameter
Min
Typ.
Max
DC parameters
Operating supply range, Vcc
Supply current, transmit (40kbps version)
Transmit (-HP version)
receive
loop test
stand-by
4.5
8
15
10
-
-
-
12
17
12
20
-
5.5
15
21
16
25
1
RF Parameters - Transmit
Radiated power (ERP) (-40kbps version)
(-HP version)
Transmit frequency (Frf) BiM-418-40
Transmit frequency (Frf) BiM-433-40
Initial frequency accuracy
Overall frequency accuracy
Spurious radiation
FM deviation (+/-)
Distortion
Modulation response @ -3dB
-10 -6
-3
+3 +6
+10
- 418.000 -
- 433.920 -
-75 0
+75
-95 0
+95
meets ETS 300-220
15 20
30
-5
10
DC -
32
RF Parameters - Receive
Receive frequency (Frf) BiM-418-40
Receive frequency (Frf) BiM-433-40
-
-
418.000
433.920
-
-
Receiver sensitivity
AF bandwidth @ -3dB
AF output level, pin 13, pk to pk
Local Oscillator leakage, pin 2
IF Bandwidth
AFC lock range (5µV signal)
Timing
RX select low to valid CD
RX select low to valid RXD
Transmit to Receive delay
RF input (5µV) to valid CD
RF input (5µV) to stable AF
-100
0.1
-
-
-
-
-107
-
400
-57
200
200
-
22
-
-
-
-
--
--
--
--
--
1
3
1
0.5
0.5
Units Notes
V-
mA -
mA -
mA -
mA -
µA -
dBm
dBm
MHz
MHz
kHz
kHz
kHz
%
kHz
1
1
-
-
-
-
2
3
-
MHz
MHz
dBm
kHz
mV
dBm
kHz
kHz
-
-
-
-
-
-
-
-
ms -
ms -
ms -
ms -
ms -
Radiometrix Ltd, BiM Data Sheet
page 5
5 Page 
www.DataSheet4U.com
figure 8: fully buffered CMOS interface - digital drive
"RS232" Serial data
It is possible to transmit "RS232" serial data directly at 4.8 to 38.4kb/s baud between a pair of BiM
transceivers in half duplex . The data must be "packetised" with no gaps between bytes. i.e. : The data
must be preceded by >3ms of preamble (55h or AAh hex) to allow the data slicer in the BiM to settle,
followed by 1 or 2 FFh bytes to allow the receive UART to lock, followed by a unique start of message
byte, (01h), then the data bytes and finally terminated by a CRC or check sum. The receiver data slicer
provides the best bit error rate performance on codes with a 50:50 mark:space average over a 4ms
period, a string of FFh or 00h is a very asymmetric code and will give poor error rates where reception is
marginal. Only 50:50 codes may be used at data rates above 20kbit/s.
We recommend 3 methods of improving mark:space ratio of serial codes, all 3 coding methods are
suitable for transmission at 40kbit/s :-
• Method 1 - Bit coding
Bit rate , Max 40kbit/s , Min 250bit/s
Redundancy (per bit) 100% (Bi-phase), 200% (1/3 : 2/3)
Each bit to be sent is divided in half, the first half is the bit to be sent and the second
half, it's compliment. Thus each bit has a guaranteed transition in the centre and a
mark:space of 50:50 . This is Bi-phase or Manchester coding and gives good results,
however the 100% redundancy will give a true throughput of 20kbit/s.
A less efficient, variation of Bi-phase is 1/3 : 2/3 bit coding. Each bit to be sent is divided
into 3 parts, the first 1/3 is a low, mid 1/3 is the data bit and final 1/3 is high. This code
is easy to decode since each bit always starts with a negative transition. This code
should not be sent faster than 100µs per bit (10kbit/s) since the mark/space can vary for
33 to 67%.
Radiometrix Ltd, BiM Data Sheet
page 11
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet BIM-418-40.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| BIM-418-40 | (BIM-418-40 / BIM-433-40) Low Power UHF Data Transceiver Module | Radiometrix |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |