© Microhard Systems Inc.
63
6.0 Configuration
Values
S105
Unit Address
2-65534
The unit address is, and must be, a unique identifier of
each modem in a network. The address value is 16-
bits in length.
The Master has by default, and must retain, a unit
address of 1; 65535 is the broadcast address.
Change the default value
for the Network Address
to something unique for
your network. Do this for
an added measure of
security
and
to
differentiate your network
from others which may
be operating nearby.
All modems in a given network must have the same
Network Address. This unique network address is not
only a security feature for a particular network, but also
allows other networks - with their own unique network
address - to operate in the same area without the
possibility of undesired data exchange between
networks.
1234567890
Values (0 - 4294967295)
S104
Network Address
Values (up to 16 char)
S107
Static Mask
default
(the word itself)
This mask
is applied to the transmitted data, and
removed from the received data. It is an added form of
security for a network.
Change
S107
to
something unique for
your network.
S108
Output Power
20 (100)
21 (125)
22 (160)
23 (200)
24 (250)
25 (320)
This setting establishes the transmit power level which
will be presented to the antenna connector at the rear
of the modem.
Unless required S108 should be set not for maximum,
but rather for the minimum value required to maintain
an adequate system fade margin.
FCC regulations allow
for
up
to
36dBi
effective
isotropic
radiated power (EIRP).
The sum (in dBm) of
the transmitted power,
the cabling loss, and
the
antenna
gain
cannot exceed 36dBi.
Values (dBm (mw))
26 (400)
27 (500)
28 (630)
29 (800)
30 (1000)
Values (bps)
S103
Wireless Link Rate
0 19200*
1 115200**
2 172800**
3 230400**
4 270000~
5 340000~
6 24700
8 1.2 Mbps***
See description for model
specific options.
This register determines the rate at which RF
communications will occur over a given network. All
modems within a particular network must be configured
with the same wireless link rate. Faster link rates result
in greater throughput, however, for each ’step’ increase
in link rate, there is an approximately 1dB reduction in
sensitivity.
*
n920 (Slow)
** n920/2420F (Fast)
*** n920/2420T (Turbo)
n920BD includes Link Rate options 0,1,2,3,6
n920X2 includes Link Rate options 0,1,2,3,4,5,6 (8 = 57600)
