Spread Spectrum Wireless Data Transceiver User Manual
(1)
M
AX
P
ACKET
S
IZE AND
(2)
M
IN
P
ACKET
S
IZE
Selections (1) and (2) 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. Throughput can be optimized when packet sizes are customized by
the transceiver. In Point-to-Point mode, however, the Max and Min Packet Settings will not have 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.
The following lists the Min Packet size settings by bytes when the RF Data Rate equals 2 and 3.
Setting
Min Packet Size
RF Data Rate = 2
Min Packet Size
RF Data Rate = 3
0 15
8
1 21
12
2 26
16
3 31
20
4 37
24
5 42
28
6 47
32
7 53
36
8 58
40
9 63
44
The following lists the Max Packet size settings by bytes when the RF Data Rate equals 2.
Max Setting
Min Setting
0
1
2
3
4
5
6
7
8
9
0
15
37
58
79
101
122
143
165
186
207
1
21
42
63
85
106
127
149
170
191
213
2
26
47
69
90
111
133
154
175
197
218
3
31
53
74
95
117
138
159
181
202
223
4
37
58
79
101
122
143
165
186
207
229
5
42
63
85
106
127
149
170
191
213
234
6
47
69
90
111
133
154
175
197
218
239
7
53
74
95
117
138
159
181
202
223
245
8
58
79
101
122
143
165
186
207
229
250
9
63
85
106
127
149
170
191
213
234
255
LUM0002AD Version
6.1
36
