TX Low Power/TX High Power
-This allows setting the RF output power for the two states of the
low/high power pin. The low-power selection corresponds to the low logic level of the pin while the high-
power selection corresponds to the high logic level. Note that the high-power selection does not necessarily
have to be greater than the low-power selection. Each is independent of the other and only corresponds to a
state of the power select pin.
Per Channel Values
-Summarizes the high and low power settings for the channels used by the radio.
5.5
MODEM TAB PAGE
The modem page allows selecting the parameters of the modem mode operation and is shown below:
The selections are:
Modem Protocol
-This selects the over-the-air protocol. The three choices are detailed below:
Low Latency Protocol with no CRC
-This is as close to a bit in/bit out protocol which can be
supported by the Ritron radio modem. A synchronization pattern is affixed to the beginning of the
transmitted stream, but after that, each symbol transmitted directly corresponds to two input bits.
No error detection or correction is used within the protocol itself. This protocol provides for the
fastest overall data rate, but sacrifices data accuracy.
Virtual Streaming Protocol
-This is similar to the low latency protocol, but the data is divided
into blocks and an error detecting CRC word is added to each block. This word is removed before
the data is passed to the data device on the receiving end. Blocks with errors are not passed on to
the data device.
Protocol 2
.
00 (Legacy)-
This is the protocol used by the DTXM-X54 family. This is a very robust,
packet protocol useful for large data blocks, but not for fast streaming or fast polling. This
protocol is useful when interfacing a system with the legacy Ritron DTXM-X54 family and/or
when data errors cannot be tolerated.