This is information about a communication time test with an oscilloscope to measure and show how fast our long-range LoRa technology works. Below is a picture of the data communication time. The Green pulses were inbound 16 bytes of data on a UART into Radio #1 at 38400bps. The Yellow pulses are the outbound 16 […]

Raveon’s WMX protocol is the preferred way to communicate over-the-air in advanced or tightly-integrated configurations. As of version D4 of the protocol, it is now possible to closely monitor message queuing, transmission and acknowledgement. This allows bandwidth usage to be optimized for the communication application. Bit 5 in the WMX control field indicates whether the […]

The following charts compare various type of coaxial cable used in VHF and UHF data radio systems.  All coax cable has a certain amount of signal loss.  When an antenna is connected to a radio modem using any type of coax cable, the transmit signal is attenuated as it passes through the cable, so the […]

Obtaining an FCC license to use a narrow-band radio channel is not difficult at all.  In fact, the FCC has listed over 300 ,000 license holders in the Land Mobile Radio service alone. Raveon’s M7 radio modem operate on radio frequencies that are regulated by the Federal Communications Commission (FCC).  In order to transmit on […]

TDMA, or Time-Division-Multiple-Access is a very effective way of allowing a lot of radios to share one radio channel.  Used extensively in GSM cellular and APCO public-safety systems, TDMA excels at allowing quick and reliable access to radio channels.  Raveon’s M7 series of GPS tracking radios and all narrow-band GPS tracking radios use TDMA to […]

Raveon Technologies data radio modems can have either wide band IF filters, which are used on 25kHz or 30kHz spaced channels, or narrow-band IF filters, which are used on 12.5kHz spaced channels.   As the picture above illustrates, it is possible to have twice the number of radio channels, when everyone uses 12.5kHz narrow band […]