RPC-418-5 RADIOMETRIX [Radiometrix Ltd], RPC-418-5 Datasheet - Page 10

• Manufacturer Part Number: RPC-418-5
• Description: UHF Radio Telemetry Receiver Module
• Manufacturer: RADIOMETRIX [Radiometrix Ltd]

Applications note
Four Channel Receiver with battery saver
Fig 7 shows a simple four channel paging receiver with 256 setable codes. The CMOS 555 timer
provides a duty cycle power save circuit which latches ON when a signal is present. The values used in
the example give 4ms ON; 400 ms OFF, i.e. 1:100 duty cycle. The total quiescent current is less than
200µA, thus a 9V alkaline battery (500 mA/hr) will give a life of over 2000 hours. The ON time is
determined by the receiver’s power up settling time (3 ms worst case) + any tolerance of the duty cycle
oscillator. The OFF time is controlled by R8 in the circuit and should be selected to suit the application
depending upon the required response time and any limits imposed upon the duration of the
transmission. It is recommended that the OFF time be no longer than 1/2 for the transmission
preamble duration.
Ordering information
SAW based OEM Transmit and Receive modules.
TXM-418-5
TXM-418-10
RXM-418-5
SILRX-418-5
BiM-418-10
RPC-418-5
Controller
EVAL-418-A
EVAL-418-B
BiM-KIT
All modules are available in a 433.92 MHz version for use in other European countries.
Radiometrix Ltd, SILRX-UHF Data Sheet
figure 7: Four Channel Receiver with power save
UK Transmitter on 418 MHz, Type approved to MPT1340
Fast transmitter on 418 MHz, Type approved to MPT1340
matching UK receiver module on 418 MHz
Low current UK receiver module on 418 MHz
Bi-directional short range module on 418 MHz
Self-contained module wich integrates the BiM transceiver with a Radio Packet
Evaluation kit for TXM & RXM
SILRX supplementary PCB for EVAL-418-A
Evaluation kit for BiM-UHF modules.
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