Appendix B Terminal Menu Reference
RFI-9256 Radio Modem User Manual
Page 72 of 109
B.1.2 (3) Radio Characteristics Menu
*** Radio Characteristics Menu ***
Hopping Pattern = 0
Tx Power Level = 20 dBm
RSSI trigger level = -110
Frame Time = 20 milliseconds
Max Tx bytes per frame = 113
Directional Bias is Disabled
(H) Hopping Pattern
(P) Tx Power Menu
(R) RSSI trigger level
(F) Frame Time Menu
(B) Directional Bias Menu
(Esc) Previous Menu
Enter Choice:
Figure 36: Radio characteristics menu
Hopping Pattern:
There are 32 (0-31) hopping patterns available. The hopping pattern determines
how the radio hops through the frequency spectrum. Co-located master units should all use different
hopping patterns to minimise interference, and all units on the same network must have the same
hopping pattern.
It is advised that the default hopping pattern not be used in order to minimise the change of
interference with other RFI-9256 in the area.
Tx Power Menu:
The transmit power menu allows the user to select the output power of the RFI-
9256. The options are:
(a)
OFF
(b)
0 dBm
(c)
+10 dBm
(d)
+20 dBm
(e)
+25 dBm
(f)
+30 dBm
The total output power from the antenna must not exceed 1W EIRP (30dBm) noting that antennas
will usually provide gain, and cables and connectors produce a loss.
RSSI trigger level:
The RFI-9256 will only attempt to acquire data if the power on the channel
exceeds the RSSI trigger level. This can be configured between -120dBm and -50dBm, however
setting this to greater than the radio sensitivity (-108dBm) will cause an artificial loss in sensitivity
and should only be done in noisy environments.