• Complies with ETSI EN 300 220-3 (radio) and EN 301 489-3 (EMC).
• Standard frequencies: 434.65 and 434.075MHz, with custom frequencies available in the 433MHz EU band.
• Data rates up to 10kbps with a usable range over 500m.
• 25kHz channel spacing, offering longer range compared to Wide Band FM modules.

• EPOS equipment, barcode scanners, data loggers, industrial telemetry and telecommand.
• In-building environmental monitoring and control, high-end security and fire alarms, DGPS systems, vehicle data up/download.

• 3-stage crystal controlled VCXO with a data bit rate of 10kbps max.
• Transmit power: +10dBm (10mW) with double conversion FM superhet.
• SAW band pass filter with image rejection of 50dB and receiver sensitivity of -118dBm.
• Supply voltage range: 2.9V - 15V with 20mA transmit and 15mA receive current.

The NiM2 transceiver includes a frequency modulated VCXO for transmission and a double conversion FM superhet for reception. The transmitter achieves full RF output within 5ms, and the receiver powers up in less than 2ms. The module provides an RSSI output with a range of 60dB.

The module features a standard pin-out with specific functions for each pin, including power supply, RX/TX select, and data input/output. It is important to avoid having both RX and TX low simultaneously to prevent undefined operation.

• Operating temperature: -10°C to +60°C; Storage temperature: -30°C to +70°C.
• RF input: ±50V @ <10MHz, +13dBm @ >10MHz; Other pins: -0.3V to +15.0V.

• Supply voltage: 2.9 - 15V; TX supply current: 20mA; RX supply current: 15mA.
• RF power output: +9 to +11 dBm; Spurious emissions: -36 dBm.
• RF sensitivity: -118 dBm @ 12dB SINAD; RSSI range: 60 dB.

The NiM2 requires a stable power supply and is factory-set for specific FM deviation. The RSSI output provides a relative indication of signal strength. Antenna choice and positioning are crucial for optimal performance, with options including whip, helical, and loop antennas.

Data is transmitted in packets with preamble, control, address, data, and CRC sections. The NiM2 supports various network configurations, including TDMA for multi-node systems, and can enhance range and reliability through techniques like store and forward repeaters and spatial diversity.

• Method 1 - Bit Coding: Uses Bi-phase or Manchester coding, dividing each bit into two halves (bit and its complement) ensuring a 50:50 ratio. Differential Manchester Encoding is also discussed, which is easier to decode.
• Method 2 - FEC Coding: Each byte is sent twice (true and its complement) to maintain balance. Adding parity and staggering the streams can improve error immunity.