beautypg.com

Scan delay in automatic modes, Summary of the three operation modes – Wavecom W-SPECTRA (Automatic Monitoring System) V1.1.0 User Manual

Page 44

background image

34

Complete Automatic Monitoring System W-SPECTRAWAVECOM Monitoring System W-SPECTRA, W-

SPEED Manual V1.1.0

 Previous and Next buttons: manually jump to the previous and next frequency respectively ac-

cording to the Step size.

There are 5 search strategies in which the classifier code check can work:

Process Steps

P1

Only classification is performed, but no decoding

P2

Classification and table check are performed, but no decoding

P3

Classification, table check and code check are performed, but no decoding

P4

Classification and table check are performed and finally the signal is decoded if
a mode with an associated, valid detector was found

P5

Classification, table check and code check are performed and finally the signal
is decoded if a mode with an associated, valid detector was found

Scan Delay in Automatic Modes

In all three operation modes (Direct mode, Memory scan and Frequency search) the classifier code check
adopts a “scan delay” method: When the classifier and code check find a signal at a frequency, the auto-
matic jump to the next frequency / database entry is deferred until the complete classifier code check re-
sult is delivered. In this way W-SPECTRA delivers more precise, stable and reliable monitoring results.

Summary of the Three Operation Modes

The following table summarizes the three operation modes and their parameters.

Direct mode

Memory scan

Frequency search

Description

Classify and decode a
signal by setting a re-
ceiver frequency manu-
ally. Use “Sweep” mode
to catch a signal in a
small range

Rescan and verify the
spectrum according to da-
tabase entries. New result
can be inserted into the
database

Automatic search signals
(classify and code check)
over a predefined frequency
band according to a search
strategy. Results automati-
cally inserted into a data-
base

Start button

Start to sweep over a
defined

frequency

range

Start to rescan the spec-
trum according to the da-
tabase entries

Start to search signals in a
wide range of frequency

Stop button

Stop sweeping

Stop rescan

Stop searching signals

Previous button

Jump to the previous
frequency according to
the step size

Jump to the previous data-
base entry

Jump to the previous fre-
quency according to the
step size

Next button

Jump to the next fre-
quency according to the
step size

Jump to the next database
entry

Jump to the next frequency
according to the step size

Default

(recom-

mended) values

Sweep range: 3000 Hz

Step size: 100 Hz

Dwell period: 1 sec

Time interval: 15 sec

Step size: 1000 Hz

Time interval: 15 sec