User's Manual

FreeWave Technologies Spread Spectrum Transceiver User Manual
900 MHz and 2.4 GHz
V5.0S
34
(1) Max Packet Size and
(2) Min Packet Size
Selections (1) and (2) allow the user to designate the size of the packets (in bytes)
used by the transceiver in its communication link. This may be of particular value
when using FreeWave with different communications software packages; you may
find that throughput is optimized when packet sizes are restricted by the
transceiver. It should be noted, however, that in Point to Point modes the Max and
Min Packet Settings will not have any material impact on throughput unless 115.2
KBaud is desired.
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 setting entered by the user and
the RF Data Rate. Tables 7, 8, and 9 provide the packet sizes for each different
combination of settings.
Table 10: Min Packet Size
Settings (Bytes)
Setting Min Packet Size
RF Data Rate = 2
Setting Min Packet Size
RF Data Rate = 3
0
16 0 8
1
21 1 12
2
26 2 16
3
32 3 20
4
37 4 24
5
42 5 28
6
48 6 32
7
53 7 36
8
58 8 40
9
64 9 44