6
MRX-900 Operating Manual: Initial Setup and Configuration
Warning:
Using an antenna other
than one approved by Microhard
Systems Inc. could result in
undesired performance, and may
damage the MRX-900. Failure to
use an approved antenna may void
your warranty. It is the user’s
responsibility to ensure the
antenna has adequate lightning
protection.
n
The
Wireless Link Rate
for both modems must be the same.
n
The
Network Address
assigned for both modems must be the
same.
n
The
Unit Address
assigned for both modems must be the same.
n
The same
Hopping Pattern
must be selected for both modems.
n
Both modems must use the same
Encryption Key
.
B. Point-to-Multipoint
To establish a point-to-multipoint network, the following requisites must be
satisfied:
n
The
Operating Mode
for one modem must be configured as a
Point-to-Multipoint Master
, and the others as
Point-to-
Multipoint Slave
s.
n
The
Serial Baud Rate
for each modem must be set to match the
baud rate of the connected equipment (DCE and DTE rates must be
equivalent).
n
The
Wireless Link Rate
for all modems must be the same.
n
The
Network Address
assigned to all modems must be the same.
n
Each Slave must be assigned a unique
Unit Address
.
n
The Master must have a list of all
Slave Unit Numbers
in its
Slave
List
.
n
The same
Hopping Pattern
must be selected for all modems.
n
All modems must use the same
Encryption Key
.
Each of the parameters above are defined using the terminal to display the
menu-driven configuration screens and setting the appropriate items. Settings
are immediately stored in non-volatile memory upon selection, and are
therefore retained even after powering down. Each item and the settable
parameters within the modem configuration are described in detail in Chapter
3: Configuration Options. Once the configuration is complete, the modems
can be restored to operation mode by either pressing ESC to exit the menu
(“
Running ...
” should then appear), or simply by power-cycling the unit
(momentarily disrupting power to the unit, then restoring it).
2.5 Checking the Link
Once configured properly, a pair or set of communicating modems can be tested
to ensure that a link can be successfully established. Attach the provided antenna
to the antenna connector on each MRX-900 and screw the antenna in snugly.
The modems should indicate the status of the wireless link via the RSSI
LEDs on the rear panel: if the link is good, up to three LEDs should
illuminate; and if the link is absent (due to a fault at one end or another, such
as misconfiguration), the LEDs will be unlit. It is recommended that if
MRX-900s will be deployed in a field where large distances separate DTEs,
the modems be configured and tested in close proximity (
e.g.
, in the same
room) first to ensure a good link can be established and settings are correct.
This will facilitate troubleshooting, should problems arise.
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