1. Device Overview

️· Name: BHX2
️· Type: Narrowband FM/FSK Transceiver Module
️· Frequency Range: Primarily 458.5 - 459.1 MHz, but configurable to other 5MHz bands (420-480 MHz) and 3MHz bands (210-270MHz).
️· Applications: Wireless data communication, remote control, telemetry, etc. (suitable for license-free operation in some regions).

2. Key Features & Specifications

️· Transmit Power: +27 dBm (500mW) ±1dB
️· Sensitivity: -118 dBm for 12dB SINAD (good receiver performance).
️· Channel Spacing: 25kHz (12.5kHz available by special order).
️· Modulation: FM, FSK (F1D, F3D)
️· Interfaces:
- Antenna: RF pins, SMA, or MCX connector options.
- Power: 2-pin Molex connector.
- User: 13-pin 0.1" pitch Molex connector.
️· Data Interface: CMOS/TTL compatible.
️· Supply Voltage: 5.5 - 15V (also available in a +5V regulated version).
️· Current Consumption: 350mA (transmit), 30mA (receive).
️· Dimensions: 85x39x13 mm (case only), up to 105mm with connectors.
️· Operating Temperature: -20°C to +60°C.

3. Communication & Control

️· RS232 Interface: Used for configuration and data communication.
- Baud Rate: 1200bps for modem, configurable via RS232.
- Data Format: 8 Data bits, No Parity, 1/2 stop bits, no flow control.
- Commands: Used to set operating frequency, channel, and other parameters. (The sheet implies commands, but doesn't list them.)
️· Parallel Control: 8 parallel selected channels.
️· Modem Operation:
- The module can be configured as a 1200 baud modem.
- RS232 driver may be needed for PC connection.
️· P1-P3 Pins: Can be configured as data lines for data input/output.

4. Pinout (Important for Interfacing)

️· Detailed pin assignments are given for the 13-pin Molex connector. Key pins include:
- Power: VCC, GND
- Data: RXD, TXD, Data input/output.
- Control: P1, P2, P3 (used for parallel channel selection or modem data).
- Modem: MOD TXD, MOD RXD, PGM (RS232 interface for configuration).

5. Regulatory & Compliance

️· Standards: Compliant with ETSI EN 300 220-3 and EN 301 489-3 (European standards).
️· R&TTE Directive: Complies with the Radio Equipment and Telecommunications Terminal Equipment Directive (relevant for European market access).
️· Ordering Information: Lists different part numbers based on antenna connector type (RF pins, SMA, MCX).



6. Important Notes & Considerations

️· Data Slicer: Cannot be relied upon for waveform frequencies below 250Hz.
️· Startup Time: Requires 50ms for stable transmit, 28-45ms for stable audio.
️· Interrupts: There are no information provided about interrupts.
️· Module is intended to operate in license-free bands This means local regulations apply.



Where to Find More Detailed Information:

️· Radiometrix Website: [https://www.radiometrix.com/](https://www.radiometrix.com/) (Check for more detailed documentation, application notes, and software tools).