User Manual

CompactRF
TM
Operating Manual: Chapter 4 Configuration 29
FCC Regulations
The hopping interval is
controlled by the master.
The slave and repeater units
will use the hopping interval
setting from the master.
IMPORTANT:
FCC Regulations allow up to 36 dBi effective radiated power (ERP).
Therefore, the sum of the transmitted power (in dBm), the cabling loss
and the antenna gain cannot exceed 36 dBi.
1 mW = 0 dBm
10 mW = 10 dBm
100 mW = 20 dBm
1000 mW = 30 dBm
For example, when transmitting 1 Watt (30 dBm), the antenna gain
cannot exceed 36 - 30 = 6 dBi. If an antenna with a gain higher than 6
dBi were to be used, the power setting must be adjusted appropriately.
Microhard Systems Inc. limits the CompactRF’s transmitted power to
100mW for all units purchased with antennas with gain above 6dBi.
AT Menu
Hopping Interval S109 9
This option determines the frequency at which the modems change channel.
Note that the Master controls this parameter for the entire network. This
setting is ignored in units configured as Slaves or Repeaters.
The allowable settings are 20 to 255. There is a multiplying factor of
0.74ms. For example, if you set the Hopping Interval to 20, the actual
hopping interval will be 20 x 0.74ms = 14.8ms.
See Appendix D for optimal Hopping Interval settings in relation to packet
size and link rate.
AT Menu
Data Format S110 C
This register determines the format of the data on the serial port. Allowable
settings are:
*1 8 bits, No Parity, 1 Stop
2 8 bits, No Parity, 2 Stop
3 8 bits, Even Parity, 1 Stop
4 8 bits, Odd Parity, 1 Stop
5 7 bits, No Parity, 1 Stop
6 7 bits, No Parity, 2 Stop
7 7 bits, Even Parity, 1 Stop
8 7 bits, Odd Parity, 1 Stop
9 7 bits, Even Parity, 2 Stop
10 7 bits, Odd Parity, 2 Stop
11 9 bits, No Parity, 1 Stop