Narrow band 10mW multi channel transceiver 70TRX-T1

The 70TRX-T1 is a professional 10mW narrow band multi channel transceiver according to EN 300220 or EN 300113. Compared to its predecessor 70TRX-T, the volume was reduced by 35%. Regarding to footprint and connecting the new module is 100% compatible.

The transmitter is produced by default for the European ISM band at 433/434 MHz. All 139 channels from 433.0625 to 434.7875 MHz are programmed in a 12.5 kHz raster. The adjustment of the frequency is predefined for the user in a simple manner in multiples of the channel raster. Therefore, complex programming of the transmitter module is not necessary. A DIP switch or simple soldering bridges are sufficient. The integrated micro controller generates a serial data protocol from the 8-bit data word which sets the synthesizer. Up to 256 channels can be pre-programmed on customers request.

The module is available for most of the worldwide used frequency bands in the 400 MHz range: 406 - 418 MHz, 418 - 428 MHz, 428 - 438 MHz, 438 - 448 MHz, 456 - 466 MHz and 466 - 476 MHz. Due to the wide range of our filters, very few variants are sufficient.

The direct audio signal output doesn`t restrict in any way the nature of the desired signal or code transmission. The transmission of digital data works just as well as analog audio or voice signal. Fast switching between TX and RX mode allows the transmission of complex data sets.

The combination with another transceiver module 70TRX-T1 offers the user a perfect radio system with long range communication at half-duplex. Together f.e. with our remote control unit FSM24 the user can expect a free field range of more than 1800 m.


  • Narrow band multi channel transceiver
  • Up to 256 channels
  • 10mW output power
  • Typical range 1800m
  • Very small size
  • Less current consumption
  • Data rate DC - 5kHz (up to 9600 Bd)
  • Suitable for analog and digital data
  • No licence required
  • Compliance to RED (2014/53/EU), EN 300220
  • also with professional approval EN 300113


  • Remote control systems
  • Industrial applications
  • Telemetry systems
  • Alarms
  • Security systems
Transceiver 70TRX-T1
Transceiver 70TRX-T1 backview


Communication Half-Duplex
Frequency range 433.0625 - 434.7875 MHz (12.5 / 25 kHz raster)
  optional 406 - 476 MHz
Number of channels 139 channels (Standard ISM); max. 256 channels
Output Power 10 mW / 10 dBm at 50 Ω
Modulation FM narrow band (analog and digital)
Data input level 5 VPP (TTL)   
Deviation ± 2.4 kHz  (± 150 Hz)    by sinus with 5 VPP
Receiver mode Double Superhet
Sensitivity at least  -119 dBm  / 12 dB SINAD (CCITT-filter)
Selectivity 15 kHz channel bandwidth
NF-Output 1.0 VPP    inverted
Data rate DC - 5 kHz (up to 9600 Bd)
Temperature range -25°C . . . +75°C
Supply voltage 4.8 - 11.5 V    (max. 4.6 - 12.0 V)
Supply current Receiver-mode:  46 mA (± 2 mA)
  Transmit-mode:  66 mA (± 2 mA)
Dimensions 51.8 x 31.6 x 9.7 mm  (with lashes 61.8 x 31.6 x 9.7 mm)
Weight 24 g
Material stainless steel with M3 mounting lashes
Antenna λ/4 - whip antenna (teflon)     optional SMA-, SMB- or MCX
Outputs Mute, RSSI, Lock Detect
Approvals RED (EN 300220)  for Europe (433.0625 - 434.7875 MHz)
  optional EN 300113

Data sheets 70TRX-T1 (multi channel)

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