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Attenuator/PreAmp
Since the MESA is a highly sensitive receiver, very strong signals can have an overloading effect
on the circuitry. Receiver overload is evidenced by strong signals appearing at harmonic
frequencies and/or from intermodulation distortion. The built-in attenuator should be turned on to
reduce or eliminate the RF overload.
Also, in certain situations when dealing with low-level signals which are partially obscured by the noise
floor, it may be necessary to boost the signal strength. This is accomplished by using the built-in pre-
amp provided on the MESA unit.
To apply attenuation or boost the signal strength, tap the Attenuator/PreAmp icon in the status bar.
Select the desired attenuation/preamp level from the drop-down list.
The Auto Attn setting uses an algorithm to monitor the signal strength and automatically apply
attenuation or the pre-amplifier as necessary.
Modes
Mode Menu
The Mode Menu, located at the top center of the screen, enables switching between the five
main operating modes of the MESA: Spectrum Mode (see below), SmartBars Mode (see page
44), Mobile Bands Mode (see page 53), WiFi Mode (page 63), and Bluetooth Mode (page 77).
Spectrum Mode
Spectrum Mode on the MESA allows easy monitoring of the RF spectrum and analysis of found signals.
This section describes the controls for navigating the spectrum and tools necessary for analyzing signals.
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