The core members of this family comprise of the SFX2 transceiver and the HMT2 transmitter. Both provide a full 500mW (+27dBm) transmit output power.
The SFX2 transceiver resembles the TR2M in all respects except a slightly taller (15mm) case, but employs a more advanced “up converting” transmit strip to both reduce the switching speed from 50mS to a lightning fast 5mS, and increase the transmitter output power to 500mW (+27dBm). In other respects the unit is similar, employing a low noise VCO/PLL locked to a TCXO reference, and providing the same full-featured user interface (with analogue and digital baseband ports, serial and parallel frequency programming and an optional noise squelch/mute).
The HMT2 transmitter is a very low profile (66x23x9mm) design, sharing a pinout with the SHX transceiver family. Internally, it uses similar PLL based circuitry to the LMT2 transmitter, with an added LDMOS power stage for full 500mW TX power.
Both modules are fully screened, with 2.54mm pitch pin header interfaces, intended for PCB mounting. A +5v regulated supply is required (at around 350mA), although a version of the SFX2 is offered with an internal LDO.
Receivers
While not explicitly included in this family, Radiometrix offers 458MHz band versions of nearly all of its narrowband UHF receiver designs, from the simple SIL NRX2B through to the LMR2 and RX2M units. All of these can be matched to a high power transceiver or transmitter.