Spread Spectrum Wireless Data Transceiver User Manual
The following lists the Max Packet size settings in bytes when the RF Data Rate equals 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
(3)
X
MIT
R
ATE
There are two settings for the Transmit Rate parameter. The setting for normal operation of the
transceiver is a Transmit Rate 1. Transmit Rate 0 is useful to qualitatively gauge signal strength. When
set to Transmit Rate 0 the transceivers will transmit back and forth continuously regardless if they have
any actual data. Therefore, in Point-to-Point operation, Transmit Rate 0 should be used only as a
diagnostic tool and not for normal operation. The strength of the signal may be gauged by the Clear to
Send LED. A solid red CTS LED indicates a strong signal, the less the LED is on, the weaker the signal.
(4)
RF
D
ATA
R
ATE
FreeWave transceivers have two settings for the RF Data Rate. This is not to be confused with the
RS232 Baud Rate. Setting 2 should be used when the transceivers are close together and data
throughput needs to be optimized. Setting 2 must also be used when full throughput of 115.2 KBaud is
necessary. Setting 3 should be used when the transceivers are farther away and a solid data link is
preferred over data throughput.
Note:
When using the transceivers in MultiPoint mode, the RF Data Rate setting must be identical for all
units in the system. Any transceiver with a RF Data Rate different from the Master will not
establish a communication link.
(5)
RF
X
MIT
P
OWER
For more information, refer to the Installation Guides for the 900 MHz and 2.4 GHz wireless modems.
(6)
S
LAVE
S
ECURITY
The transceiver’s security may be disabled so it will accept a call from any other FreeWave unit. The
default setting is 0, where security is enabled. When enabled, the caller’s serial number must be in the
Slave’s Call Book. With a setting of 1, security is disabled.
Slave Security must be set to 1 when the unit is operating in Mode 6 Master/Slave switchable or a Point-
to-Point system where it may need to accept calls from more than 10 different FreeWave transceivers.
However, it is important to note that when Slave Security is set to 1 the transceiver will accept calls from
any other FreeWave transceiver, and additional system security measures should be taken to prevent
unauthorized access.
LUM0002AD Version
6.1
37
