Product Manual
Stinger User Manual Page 10 of
33
Wiring Diagram of Stinger subscriber module to Computer with Surge
Suppressor
Ethernet
cable
outside
wall
Ethernet
cable
SM
333SS
Computer
to NIC 24 VDC to
Stinger
wall
adapter
10
AWG
CU
wire
grounding
system
ALIGN THE SUBSCRIBER MODULE
There are two methods that can be utilized for aligning a subscriber module to an access
point
module. The first is to monitor the RSSI and Jitter values on the subscriber. The second is
to
utilize the built-in alignment tool on the subscriber module. In either case it is necessary for
a
computer to be connected to the subscriber module to gain access to the web-based
interface.
Monitoring
RSSI and
Jitter
The RSSI (received signal strength indicator) and Jitter are two parameters that can be used
for
alignment of a subscriber module. The RSSI level must be above 700 and the Jitter must be 9
or
below (with 5 being the best) for a link to be
acceptable.
•
Point subscriber module in direction of the access point. Remember that when using
the
internal patch antenna the energy is radiated out in a 60
o
horizontal by 60
o
vertical
pattern.
IF USING A PASSIVE REFLECTOR on 2.4 GHz SUBSCRIBER
MODULE:
the passive reflector will change the radiated pattern to
6°
horizontal by 6°
vertical.
•
The module has a series of states that it will go through to register to an access
point.
Those states are: scanning, syncing, registering, and registered. RSSI and Jitter will
not
report on the web page till the unit is registered. If the module will not register ensure
that
there is line-of-sight, the access point module is transmitting, the color codes match,
and
that the subscriber is within the appropriate distance to the access point as specified by
the
max range value on the access point
module.
•
After the module has registered, slowly adjust the positioning of the subscriber module
until
RSSI has been maximized and Jitter has been minimized. Lock down the module
when
appropriate.
•
Perform a link test to check the efficiency of the link. See Link Test for further
information.
The efficiencies must be above 90% in both the up and down link for packet loss to
not
occur.
USing
Alignment Mode
The Alignment web page will display, in graphical form, levels for RSSI, Jitter, and the number
of
registered users at the access
point.