Levels Page - DEVA Broadcast DB7000 Maintenance And Operating Instructions

LEVELS PAGE

Enter the Main Menu page and select the Level icon, press OK button to enter the menu.
Levels page shows bar graph representation of the different signals, measured by DB7000.
The parameters are divided into groups. Each bar graph displays the low, average and high values
of the signal. The number in the center below represents the average value. The shaded color
number, placed on the left and right bottom edges, denotes the measurement range of the signal.
Measurement units and name of the signal are written above the corresponding bar graph.
The RF level at the selected antenna input is measured in dBμV. The RF attenuation is included
in the level calculation.
The Frequency offset of the RF carrier is measured in kHz. This signal measures the misalignment
between the modulation and demodulation frequency. As the misalignment is expected to be small,
a large offset will indicate disturbance (for example adjacent channel breakthrough).
The Frequency offset is measured with better accuracy if there is no modulation of the carrier.
The usable range depends on the selected IF filter bandwidth. For better results, we recommend
the IF filter bandwidth to be manually set to 153 kHz.
The Level of multipath reception is measured in percents. The multipath detector measures
the amplitude fluctuations of the signal. The FM signal is broadcast with a fixed level; therefore
the level fluctuations will indicate degraded signal quality. At multipath conditions, large level
fluctuations can be measured. Install the antenna at the reception point with the lowest multipath
level in order to achieve better re-broadcast.
IF Bandwidth - Shows the currently IF filter bandwidth.
E-mail: office@devabroadcast.com ,Web: www.devabroadcast.com
Group 1. RF carrier related parameters
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