Levels Page - DEVA Broadcast DB4004 Maintenance And Operation Instruction Manual

Levels page

Select Level icon from Menu page and short press OK button on it. The transition to Levels page
will be made.
Levels page shows bargraph representation of different parameters, measured by DB4004. The
parameters are shown in groups by four. Each bargraph displays averaged momentary value in
highlighted color number, minimum and maximum peak values. Shaded color number found on
the left and right bottom edges denotes the measurement range of the parameter. The name and
measurement unit of the parameter is shown above corresponding bargraph.
Group 1. This group shows RF carrier related parameters
taken into account in level calculation;
misalignment between the modulation and demodulation frequency can be measured. As the
misalignment is expected to be small, a large offset indicates disturbance (for example adjacent
channel breakthrough). Frequency offset is measured with better accuracy if there is no modulation
of the carrier. The usable range depends of selected IF filter bandwidth. For best result set IF filter
bandwidth to 153 kHz (manual).
RF level in dBµV at the selected antenna input. The attenuator position is
Frequency offset of the RF carrier in kHz. With this parameter the
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