SITE (Site Survey) Menu
The SITE menu displays the results of a Site Survey conducted with this Gateway.
NOD XX
M XX
R XX
Y XX
G XX
*
SITE
Single-click
Button 2
Single-click
Button 2
Double-click
Button 2
adjust right rotary
switch to survey the
selected Node
Double-click
Button
2
AUTO
DISPLAY
LOOP
Site Survey
Gateway
The SITE menu displays the device number of the Node the Site Survey was
conducted with as well as the missed, green, yellow, and red received packet
count.
The SITE menu is only available on the Gateways.
To access the SITE menu, single-click button 1 to scroll across the menu levels
until reaching the Site Survey (SITE) menu.
See
Conducting a Site Survey Using the Menu System
on page 17.
See
Interpreting the Site Survey Results
on page 18.
3.7.2 Interpreting the Site Survey Results
Site Survey results are listed as a percentage of data packets received and indicate the signal strength of the received
signal.
Result
Description
Green
Packets received at a strong signal strength. A strong signal strength is greater than
−
90
dBm at the receiver.
Yellow
Packets received at a good signal strength. A good signal is between
−
90 and
−
100 dBm
at the receiver.
Red
Packets received at a weak signal strength. A weak signal is less than
−
100 dBm at the
receiver.
Missed
Packets not received on the first transmission and requiring a retry.
Judging if the reliability of a network’s signal meets the needs of the application is not just a matter of green, yellow, and
red packets received. In normal operating mode, when data packets are not received, the transmitter re-sends the packet
until all data is received.
For slow monitoring applications such as a tank farm, where data is required in terms of seconds or minutes, receiving
most of the data in the ‘red’ range, indicating a weak but reliable signal, transmits enough data for accurate monitoring.
Nodes positioned near the outside range of the radio signal may have 90% of the data packets received in the red zone,
again indicating a weak, but reliable signal.
Sure Cross
®
Performance DX80 Wireless I/O Networks
18
www.bannerengineering.com - Tel: 763.544.3164
