Audiotel International Limited 2-400-0001 ユーザーズマニュアル
20
AUDIOTEL INTERNATIONAL MN400872 Issue 1 (08/04)
D
ETECT
IV User Manual
AUDIOTEL INTERNATIONAL MN400872 Issue 1 (08/04)
21
Harmonic Receiver IDENTIFY screen
The Harmonic Receiver Identify screen displays the radio frequency spectrum in a compressed
form.
form.
To change the span of the Spectrum displayed use the Zoom In and Zoom Out on-
screen buttons.
The current zoom level is indicated in the upper part of the screen above the spectral display.
As in the broadband Identify screens the Alarm thresholds remain active
Listening to a captured radio signal - Auto Tuning
When Auto Tune is selected the cursor (and hence the listening receiver) is automatically tuned to
the highest level signal on the screen.
When Auto Tune is selected the cursor (and hence the listening receiver) is automatically tuned to
the highest level signal on the screen.
To turn Auto tuning On or Off press the Auto Tune on-screen buttons.
Auto tune is ON when the button appears down (the Auto Tune text appears black)
and the tuning cursor is displayed in
and the tuning cursor is displayed in
blue
.
Note Manual tuning is inactive in Auto Tune.
Manual Tuning
The audio output for the Harmonic Receiver Identify stage is FM (Frequency Modulation). The
actual signal being listened to is identified with
The audio output for the Harmonic Receiver Identify stage is FM (Frequency Modulation). The
actual signal being listened to is identified with
green
tuning cursor cross-hairs.
To select a particular signal to listen to either:
Touch the display screen on the required signal peak
or
Use the LEFT and RIGHT controls to move the cursor left or right respectively.
The cursor can also be dragged using a finger to drag across the touch screen
Note: The harmonic receiver captures the RF spectrum (10MHz to 10GHz) in four bands
(approx. 2.5GHz wide), therefore when scanning rapid clicking will be heard as the
receiver switches through the bands in sequence.
receiver switches through the bands in sequence.