AvaLAN Wireless AW900R4-EVAL - Manual (Page 10)

User’s Manual
PAGE 10 Technical support (650) 384-0000 www.avalanwireless.com
AW900R4-EVAL
12. A snapshot of the module’s status can be retrieved by clicking the “Get Stats”
button. Here is an explanation of the values returned:
Name Meaning
RSSI Received Signal Strength Indication in dBm. This is useful when aligning
antennas or evaluating path attenuation.
Radio Block Error Rate Percentage of radio data blocks that are incorrectly received.
Radio Failed Packets Count of failed data packets since the last reboot. This may remain zero
because of retries even when the Radio Block Error Rate climbs because of
a poor connection.
Radio Passed Packets Count of successful data packets since the last reboot.
Radio Total Packets Total packets transmitted since last reboot.
Radio Average TX Size Average bytes transmitted per packet, a function of the serial data source
and the selected tuning parameters.
Radio Average RX Size Average bytes received per packet, a function of the serial data source and
the selected tuning parameters.
Current RF Channel The RF channel currently in use. If a fixed channel is configured, this
number should match. If automatic selection, this number may change
from time to time as the radios look for the channel with the lowest block
error rate.
Connected Subscribers/
Subscriber Key
For the AP, the number of SUs linked; for each SU, the ID number assigned
to it.
RF Connected True if the radio is linked and able to exchange data. False otherwise.
Radio Active True if the radio has a valid configuration and is linked or searching for a
link. False otherwise.
Radio Version 900 MHz Full Band for this product.
Radio Firmware Release The version of the firmware running in this module. Check www.avalan-
wireless.com from time to time to see if a later version is available.
13. The Spectrum Scan may be used to identify interference issues. When “Get
Spectrum Scan” is clicked, the module’s transmitter is disabled, interrupting the
serial data flow. The receiver is tuned across the 900 MHz band and the RSSI is plot-
ted for each frequency. You can select the frequency step size and the number of
samples to be taken and averaged at each frequency. The smaller the step size and
the larger the number of samples averaged, the longer the scan will take. If you
perform a scan from a Subscriber Unit, you may see large transient spikes caused
by the Access Point scanning the channels because the Subscriber Unit has gone off
line. Scanning from the Access Point will show a better picture of external interfer-
ence sources. After a spectrum scan, the radio will resume normal operation.
14. The LEDs on the AW900R4 PC board can be very useful in determining whether
the link is operating normally or if not, where the trouble might be. The next page
shows where these LEDs are located and the meaning of each.