Optimizing The Radio Network; Modem Type Setting; Inter-Packet Gap Settings; Baud Rate Setting - GE MDS SD Series Technical Manual

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5.3 Optimizing the Radio Network

With basic configuration complete, there are several additional settings
that can be made to optimize the radio system. The settings below
should be reviewed and changed as necessary to suit your particular
application.

Modem Type Setting

All radios in the network must be set to the same modem type and speed.
A range of values is available. The default setting is
may be set/viewed using the
Page 43 for details.
In general, the higher the modem baud rate, the faster the communica-
tion speed over the air. However, it must be remembered that signal
strength also plays a role in how fast a transmission may be sent. If sig-
nals are strong, faster speeds are possible. If signals are fair or poor,
slower speeds may be needed to achieve the best communication results
with the least number of re-transmissions due to errors.

Inter-Packet Gap Settings

For radios operating in Packet Mode, the inter-packet gap is a timing set-
ting used to delimit a packet on the serial interface. Too short of a time
can cause serial streams to be combined into one large packet instead of
two smaller ones. Too long of a time can slow down the communica-
tions channel.
Inter-Packet Gap Settings for
figuration>>Radio>>Packet Settings

Baud Rate Setting

The higher the baud rate, the faster the communication speed of the
serial link connected to the
effect on over-the-air transmission speed.
The modem baud rate is set using the
Ports>>COM1/2 Port Settings
NOTE: Baud rate settings that are matched or higher than the modem
speed should be used in all cases. If the baud rate must be
lower than the modem speed, the
adjusted. See "Data Key Hold Time-out" located on Page 54.
SD Series Technical Manual
Configuration>>Radio>>Basic Settings
and
COM1 COM2
window. See Page 48 for details.
port. However, this setting has no direct
COM
Configuration>>Communication
window. See Page 67 for details.
Data Key Hold Time-out
. This setting
9600
screen. See
are made using the
Con-
can be
MDS 05-4846A01, Rev. H