Low Power Radio Modem
The Low Power Radio Modem is an ultra low power transceiver, mainly intended for 315, 433, 868 and 915 MHz frequency bands. It has been specifically designed to comply with the most stringent requirements of the low power short distance control and data communication applications.

A unique UHF RF Radio Modem

The UHF Transceiver is designed for very low power consumption and low voltage operated energy meter reading applications. The product is unique with features like compact, versatile, low cost, short range, intelligent data communication, etc. The product also has 2 / 3 isolated digital inputs and outputs. Necessary command sequences will be supplied to operate these telecommands from the user host.

The radio modem is designed primarily for FSK systems in the ISM / SRD bands at 315, 433868 and 915 MHz, but bands can be easily programmed for operation at other frequencies between 300 MHz and 1000 MHz. The modem supports maximum data rates upto 19.2 kbps.
 
Features

  • Programmable Frequency (300 – 1000 MHz)
  • Low operating voltage (3.3 V)
  • Active peak current, less than 75 mA
  • Incoming status signal indication
  • High receiver sensitivity (-110 dBm)
  • Compact and light weight
  • Programmable output power, ranging from -20 to +10 dBm
  • Suitable for frequency hopping protocols
  • User programmable
    1. Data rate
    2. Centre frequency
    3.Channel frequency (Max. 20 channels)
TECHNICAL SPECIFICATIONS

TRANSMISSION

Transmit data rate : 600 to 19, 200 Baud
Modulation : Binary FSK
Output Power
(Programmable) 433 MHz : -20 to +10 dBm
(Programmable) 868 MHz : -20 to +5 dBm

RECEPTION

Receiver sensitivity 433 MHz  : -109 dBm
Receiver sensitivity 868 MHz : -105 dBm
Output signal phase noise : -85 dBc / Hz
At 100 KHz offset from carrier
Range  : 100 meters plus (open range) with 0 dBi
omni directional antenna

FREQUENCY / CHANNEL OPTIONS

Spread spectrum feature  : Hop rates of 1 to 100 (max) depending on bit rate 
and amount of data to be sent during each 
transmission. 
Channel selection : About 20 channels can be selected through
software programmability.

INTERFACE / CONNECTORS
Data : RS – 232, through 9 pin D type connector
Antenna : SMA connector
Power : 2 Pin circular jack

POWER

Supply voltage : 3.3 v Typ. (3 to 3.6 v)
Supply current
Transmit mode (10 dBm)  : 60 mA (Max.)
Receive mode : 40 mA (Max.)

ENVIRONMENTAL

Operating temperature  : 0° C to 50° C
Storage temperature : -20° C to +70° C 
Relative humidity : 5 to 90 % (non-condensing)

OPTIONS

Digital outputs   : 2 / 3 nos. of isolated relay contacts
Digital inputs : 2 / 3 nos. of opto isolated inputs
Packaging : Board only or compact metal enclosure

Accessories
  • Universal Adaptor
  • PC Communication Cable

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Datasheet
  • Low Power Radio Modem

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