Specifications

- time needed for the packet transmissiont [ms]

- number of bytes transmitted (consider the longest possible

reply from RTU)

n [ - ]

- Modulation rateb [kbps]

- Forward Error Correctionfec [ - ]

fec = 1.00 if FEC = Off

fec = 0.75 if FEC = On

This calculation gives approximate results ( ± 3ms). When more accurate calculation is necessary,

please check the calculation tool on Racom web pages http://www.racom.eu/eng/products/radio-modem-

ripex.html#calculation

TX delay is configured in the Settings / Device / Operating Mode menu, for Radio 1 (left) and Radio 2

(right):

10.3. Bridge mode and COM stream

The COM port in Bridge mode can be switched into the Stream mode. In any other mode, a packet/frame

coming to RipEX over any interface has to be received completely before any further processing. In

Stream mode the incoming bytes are transmitted to radio channel with minimum possible delay, byte

by byte. Consequently nor checks neither processing of the data can be done. All the bytes are simply

broadcast to the radio channel and every radio modem which can receive them forwards them imme-

diately to its COM port(s).

Obviously there can not be any repeaters in the Stream mode and no measures against possible colli-

sions can be taken. The responsibility for collision-free communication remains solely with the application.

Consequently only simple master-slave polling-type applications, which never respond to broadcasts,

can use the Stream mode. This mode should be used solely in applications which would not work when

the normal store-and-forward regime is used because of the inevitable delays involved.

The Stream mode is configured in the Settings / Device / Operating Mode menu:

Channel access