User's Manual

8 MDS iNet 900 Installation Guide MDS 05-2873A01, Rev. A
DRAFT 6—8/29/01
3.3 A Word About Radio Interference
The iNet 900 transceivers share frequency spectrums with other ser-
vices and other Part 15 (unlicensed) devices in the USA. As such, near
100% error-free communications may not be achieved in a given loca-
tion, and some level of interference should be expected. However, the
radio’s flexible design and hopping techniques should allow adequate
performance as long as care is taken in choosing station location, con-
figuration of radio parameters and software/protocol techniques.
In general, keep the following points in mind when setting up your com-
munications network:
1. Systems installed in rural areas are least likely to encounter
interference; those in suburban and urban environments are more
likely to be affected by other devices operating in the license-free
frequency band and by adjacent licensed services.
2. If possible, use a directional antenna at remote sites. Although these
antennas may be more costly than omnidirectional types, they con-
fine the transmission and reception pattern to a comparatively nar-
row lobe, which minimizes interference to (and from) stations
located outside the pattern.
3. If interference is suspected from a nearby licensed system (such as a
paging transmitter), it may be helpful to use horizontal polarization
of all antennas in the network. Because most other services use ver-
tical polarization in this band, an additional 20 dB of attenuation to
interference can be achieved by using horizontal polarization.
COM2 ON Not Defined
Blinking Data TX/RX
OFF No data detected
PWR ON Primary power (DC)
present
Blinking Slow = Sleep mode
Quick = Alarm present
OFF Primary power (DC)
absent
LINK
(Access Point)
ON Default state
Blinking Data Tx/Rx
OFF Not Defined
LINK
(Station
Adapter)
ON Associated to AP
Blinking Data Tx/Rx
OFF Data Tx/Rx
Table 2.iNet Front Panel LED Functions
LED Label Activity Indication