User's Manual Part 1

92 APCD-LM043-8.0 (DRAFT C)
6: Installation & Diagnostic Tools
6.3 EUM Configuration Utility
The EUM can also be configured and monitored using the EUM Configuration Utility, a
Windows-based graphical user interface (GUI) running on a PC. The PC connects to the EUM
through the unit Ethernet port or from anywhere in the LMS4000 900 MHz Radio Network. The
EUM Configuration Utility and
EUM Configuration Utility User Guide can be downloaded from
the WaveRider Web site at www.waverider.com
.
6.4 Spectrum Analyser
On the CCU or EUM, the radio analyse command forces the radio to step across the
frequency band. At each frequency, it will measure and report the peak, average and noise
floor powers. It will also report the presence and level of any packets received from a
WaveRider CCU3000 or NCL1900. The radio analysis is configured using the parameters
described in Table 14:
Table 14 Radio analyser Configuration Parameters
Parameter Description
Samples The number of RSSI and noise floor samples taken at each frequency.
Samples affects the accuracy and duration of the measurement. The default
value is
200. The maximum RSSI reported is the largest of the RSSI
samples, the average RSSI reported is the mean of the RSSI samples, and
the noise floor reported is the maximum of the noise floor samples.
NOTE: Samples are not synchronized to any packet transmissions or
receptions. Since many transmission sources, including WaveRider
systems, transmit intermittently, there is the possibility that sources
may not be transmitting when the samples are taken, and that they
will subsequently be missed.
Interval The step size between sample points. The default is
2 (200kHz), which is
also the minimum step size allowed. The maximum interval is
200 (20MHz).
NOTE: Although the step size can be set in 100’s of kHz, odd frequencies
(9053 and 9057MHz, for example) will always be rounded down (to
9052 and 9056MHz, in the preceding example).
Start The lowest frequency sampled, in 100’s of kHz. The default is
9000
(900.0MHz), which is also the minimum allowed. This minimum value is
outside the allowed transmit range of the EUM and CCU, which is permitted
since the radio does not transmit during spectrum analysis. This provides
the operator with information about interference near the band edge, which
can aid in the identification of any interferers.