AIRSCOUT SPECTRUM
Tempo Communications Inc.
1390 Aspen Way • Vista, CA 92081 USA • 800-642-2155
16
2.7.1 REF
The REF submenu is available for Airscout Spectrum 0.3-3 GHz for all it’s RBW and also REF submenu is available for
Airscout Spectrum 2-8 GHz when selecting 30 khz or 100 khz RBW. It allows changing the gain and thus the reference level of
the spectrum analyzer. The current reference level is displayed at this menu and on the right side under the graph. The refer-
ence level can be raised or lowered by 6 or 12 dB by using the buttons. Tapping the DEFAULT button sets the default reference
level.
The reference level indicates the maximum input power level that Airscout Spectrum can display
without distortions. By adjusting it, the usable input power range is tuned: higher reference level allows
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The reference level is also raised by turning off the LNA and increasing the attenuation – either by increasing internal
attenuation (Main screen
Æ
LEVEL
Æ
ATT) or by adding external attenuators and then correcting the displayed levels with an
offset (Main screen
Æ
LEVEL
Æ
SCALE).
The displayed input power range is automatically adjusted for different reference levels to ensure
optimal use of display, but it can be manually changed at the SCALE menu.
To exit the REF submenu and return to the LEVEL menu, tap BACK.
The RBW & VBW menu
The RBW & VBW menu
