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Chapter 5: Configuration
Table 5-1 (continued). AT commands.
y < command
command name > x
Description
&H0
Frequency Restriction
By default, the MDR100A-R5 or MDR112A-R5 will hop on frequencies across
the entire 900-MHz ISM bands. For some applications or within certain
operating environments, You might want to prohibit the modem from
operating on specific frequencies or range(s) of frequencies. The modem will
not allow “too many” frequencies to be restricted; it requires a certain
amount of bandwidth within which to operate to comply with regulations.
Following is an example of entering Frequency Restrictions on a MDR100A-R5
or MDR112A-R5 modem. First, the AT&H0 command is invoked:
Figure 5-1. Frequency Restriction.
The modem responds with a prompt for the Unit Address.
(Enter the Unit Address for the Master [1] and all Repeaters in the network
into each modem in the network.)
NOTES:
All modems in the network must have the same frequency restriction
configured within them.
Use the ATg or ATG feature to help identify the frequency/range of possible
interfering signals within the 902–928MHz ISM band, and then use the
AT&H0 feature to configure the modem to avoid them.
After you enter “1,” the modem prompts you to enter the first restricted
frequency.
Figure 5-2. Unit Address.
