RF Modules Australia has introduced Radiometrix TDH2 Multi Channel Radio Modem.
The TDH2 is a 9600baud half-duplex multi channel OEM radio modem with a power output of 25mW. The TDH2 is the high power version of the well established and successful TDL2A and is a 100% pin-compatible drop-in replacement for the TDL2A.
The TDH2 can be used to replace the TDL2A in applications where greater radiated power is desired. The TDH2 acts as a transparent serial cable to attached hosts.
TDH2 is an intermediate level OEM radio modem which is in between a raw FM radio module like BiM2 and a sophisticated OEM radio modem like SPM2. It takes care of preamble, synchronisation, bit balancing and error checking along with automatic noise squelching.
For multiple radio systems (polled networks) a TDH2 can be set to 1 of 8 unique addresses. As well as having unique addresses, the TDH2 allows operation on one of 5 pre-set frequencies in the 433MHz band. These frequencies are non-overlapping and simultaneous operation of TDH2s in the same area on different channels will be possible. Units are supplied on 433.925MHz (Ch0) as default.