User's Manual

FreeWave Technologies User Manual Addendum
421-512 MHz Transceiver
V1.0
LAD0014AA Rev A
4 of 11
The LRS Series of radios are single frequency devices. Meaning they are designed to
operate on only one channel per network. The device default is single frequency
mode. This is displayed as seen in Fig. 2.
While still in the “More Options” section of the FreqKey menu:
1. Enter 1 to program the transceiver to operate on a single frequency.
2. When prompted enter the number of the frequency to be used:
Enter New Frequency Channel (0-63).
3. Once the single frequency has been entered it will appear at the bottom of the
table as the Single Channel being used. In addition, the FreqKey in the Radio
Parameters menu will now be programmed as Single Channel. Refer to Fig. 2.
Min/Max Packet Sizes
Min/Max Packet Sizes allow the user to designate the size in bytes of the packets
used by the transceiver in its communication link. This may be of particular value
when using FreeWave with different communications software packages. In addition,
packet sizes should be changed for every network, especially when overlapping or
adjacent networks are installed.
The combination of Max and Min Packet Size settings determines the allocation of
the communication link from the Master to the Slave and vice versa. With a given
Max Packet Setting the Master will transmit up to that number of bytes on every hop.
If fewer than that number of bytes is transmitted the balance is allocated to the
Slave’s transmission, in addition to the quantity in the Min Packet Size Setting.
Packet size is determined by a combination of the settings entered by the user and
RF Data Rate. The following tables provide the packet sizes for each different
combination of settings.
In the Radio Parameters menu, enter the Min Packet size (0-F), Max Packet size (0-
F), and the RF Data Rate (2 or 3). Please see the following tables to determine min
and max packet sizes and RF Data Rate to be used based on the number of bytes of
data being transmitted.
PLEASE NOTE: the invalid settings as indicated by “xxxx” on the tables.
For example, if the Minimum Packet Size is set to 7, Maximum Packet Size to 6, and
the RF Data Rate to 3, the radio would be transmitting 110 bytes per hop. Refer to
Table 1; a Min Packet size of 7 and RF Data Rate of 3 shows a minimum packet size
of 38 bytes per slot. Next, refer to Table 3. A Max Packet size of 6 and RF Data Rate
of 3 shows a maximum 72 bytes per slot. This gives a total of 110 bytes per slot.