Audiotel International Limited 2-400-0001 ユーザーズマニュアル
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AUDIOTEL INTERNATIONAL MN400872 Issue 1 (08/04)
D
ETECT
IV User Manual
AUDIOTEL INTERNATIONAL MN400872 Issue 1 (08/04)
21
To improve the audio quality of a captured radio signal press the P control on the
keypad to pause the receiver.
This pauses the receiver on the band of the captured signal. The background clicking
will know cease and the audio quality will improve.
Scanning in DIFFERENCE mode
The Diff On on-screen button selects and deselects the Difference mode.
The Diff On on-screen button selects and deselects the Difference mode.
Difference mode is ON when the Diff On button appears down (the Diff On text
appears black) .
When Difference mode is selected the current scan display is stored as a reference scan, all
subsequent scans are compared with this reference scan and the differences between the two
are displayed. This allows the user to take a scan of background RF activity prior to entering the
target area and effectively cancelling out background signals from the display. This will help in
highlighting signals peculiar to the target area that will require investigation.
subsequent scans are compared with this reference scan and the differences between the two
are displayed. This allows the user to take a scan of background RF activity prior to entering the
target area and effectively cancelling out background signals from the display. This will help in
highlighting signals peculiar to the target area that will require investigation.
Previous scans from a target area can also be used as reference scans allowing changes in RF
activity between sweeps to be highlighted quickly. These stored reference scans are captured
when the p control is used and held in the EVENT LOG - reference list. Uploading stored scans
is covered later in this manual in the EVENT LOG section.
activity between sweeps to be highlighted quickly. These stored reference scans are captured
when the p control is used and held in the EVENT LOG - reference list. Uploading stored scans
is covered later in this manual in the EVENT LOG section.
Measuring a signal frequency
Note This facility is only available in Spectrum mode with Auto Tune selected.
To measure the frequency of a captured radio signal
Press the p control on the keypad.
This pauses the display and also attempts to measure the real RF frequency of the signal
indicated by the blue cursor cross-hairs.
The value is displayed above the main spectrum display.
indicated by the blue cursor cross-hairs.
The value is displayed above the main spectrum display.
Note
D
ETECT
IV takes four measurements. The result is only displayed if a
consistent result is obtained in three of the four attempts.