The original FRH-07T features high performance with an extremely low current consumption in three power modes, and is a great choice for battery powered applications.

This highly configurable unit has many features that are designed to avoid interference. Frequency selection is programmable from 1 to 94 channels and by grouping for it's frequency hopping algorithm. The data rate is settable from 300 bps to 115.2 kbps for error rate control and system compatibility. Automatic error detection and retransmission are included in the firmware for ease of integration.

A superior signal-to-noise ratio and a diversity antenna feature (two ports) help overcome reception problems in areas prone to multipath fading commonly encountered in manufacturing plants. This module is compatible with the entire FRH series of drop-in modems.

Radio Characteristics

• Engineering standard: FCC Part 15.247, ETS 300 440 approved (no user license required)
• RF power output: 5mW/MHz max.
• Modulation: Direct sequence spread spectrum
• Communication scheme: Single communication
• Frequency band: 2420.0 to 2479.0 MHz
• Frequency channel: 54 channels (27 channels available for simultaneous communication in one area)
• Channel management: Fixed mode or group mode
• Fixed mode: communication by fixing 1 arbitrary frequency from 54 freq.
• Group mode: multi-access within a group of plural frequencies
• Data barer: rate 51.9 kbps
• Oscillation: PLL synthesizer
• Antenna: diversity 2 branch reception diversity
• Service area: In an indoor environment: 60m radius, depending on the environment
• In an outdoor environment: more than 300m (line-of-sight)
• RF connector: Hirose U.FL-R-SMT
• In/out of connector 30 times max. using E.FL-LP-N extractor(for exclusive use)

Data Terminal Interface

• Physical interface: Molex 53780-1400 (14 pins)
• Mating connector: 51146-1400
• Interface specification: Serial communication Input CMOS level (5V tolerant with hysteresis) Output CMOS level Communication Full-duplex or half-duplex system Synchronization
• Asynchronous Transmit/receive buffer: Approx. 3 k bytes in total Baud rate 300 / 600 / 1200 / 2400 / 4800 / 9600 / 19200 / 38400 /50000 / 62500 / 83333 / 100000 / 57600 / 115200 bps
• Flow control: Hardware flow
• Data length: 7 or 8 bit
• Stop bit: 1 or 2 bit
• Parity: Even, odd, or none

Power Supplying

• Supply Voltage: 2.7 to 3.3Vdc
• Current Consumption:
• 35mA or less in the active mode.
• 5mA or less in the RF stop mode.
• 2mA or less in the ULTRA mode.
• 70uA or less in the shutdown mode.

Environmental

• Operating Temperature: -20° to +50°C
• Storage Temperature: -20° to +60°C
• Operating Humidity: 90%RH max. (no condensation)
• Storage Humidity: 90%RH max. (no condensation)
• Vibration Resistance: JIS-C-0040 (50m/s²)
• Shock Resistance: JIS-C-0041 (500 m/s²)

**(JIS specification is Japanese industry standard)**

End of an Era...
Well, he did it, Tom Herman decided to hang up his tools and venture into the world of retirement. His send off was Wednesday, June 25th 2008. It was held at "The Pines" golf course club house just up the road from the shop.