User Manual

Global Transceiver Module (GXM) Wireless Data Transceiver User Manual
LUM0031AA
Version 1.0 31
The following table defines the Maximum packet size in bytes by way of charting the Min Packet Size
setting versus the Max Packet Size setting where the RF Data Rate is set to 2.
Maximum Packet Size Definition with RF Date Rate of 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
The following table defines the Maximum packet size in bytes by way of charting the Min Packet Size
setting versus the Max Packet Size setting where the RF Data Rate is set to 3. Using the default settings,
the actual maximum packet size, in bytes, is 172.
Maximum Packet Size Definition with RF Date Rate of 3
Max Setting
Min Setting 0 1 2 3 4 5 6 7 8 9
0
8 24 40 56 72 88 104 120 136 152
1
12 28 44 60 76 92 108 124 140 156
2
16 32 48 64 80 96 112 128 144 160
3
20 36 52 68 84 100 116 132 148 164
4
24 40 56 72 88 104 120 136 152 168
5
28 44 60 76 92 108 124 140 156 172
6
32 48 64 80 96 112 128 144 160 176
7
36 52 68 84 100 116 132 148 164 180
8
40 56 72 88 104 120 136 152 168 184
9
44 60 76 92 108 124 140 156 172 188
Referencing the default settings, the Master will transmit up to 172 bytes on every hop. If fewer than 172
bytes are transmitted, the balance is allocated to the Slave's transmission, plus the quantity in the Min
Packet Size Setting.
For example, if a Master transmits 100 bytes, the Slave will then have a total of 116 bytes available
(72(“leftover bytes”) + 44 (Min packet size)).
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