Freedom R8100 SERIES, Руководство оператора

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Note: See the Technical Specification: ETSI TS 102 361-1 Electromagnetic compatibility and Radio
spectrum Matters (ERM); Digital Mobile Radio (DMR) Systems; Part 1: "DMR Air Interface (AI)
protocol", Burst timing.
Select View (Power Profile submenu)
Select the slot(s) to view. Although slots are alternating 30 milliseconds, the profile for a slot is 30.5 ms,
divided into three regions for ramp-up (1.5 ms), burst (27.5 ms), and ramp-down (1.5 ms).
Current – Horizontal axis -0.25 ms to 30.25 ms with slot from 0 to 30 ms.
Alternate – Horizontal axis 29.75 ms to 60.25 ms with slot from 30 to 60 ms.
Both – Horizontal axis -0.25 ms to 60.25 ms with slots from 0 to 30 and 30 to 60 ms. See Figure
2.2.7.2.3.2-2 .
Note: Ramp up/down times for a slot overlap the adjacent slots by 0.25 milliseconds.
Vertical Maximum (Power Profile submenu)
Adjusts the maximum level for the vertical scale of the display (top line) from -120 dBm to +60 dBm in
1 dB increments.
Vertical Scale (Power Profile submenu)
Selects the vertical scale resolution for the display’s major grid lines from 1 dB/div to 10 dB/div via a
horizontal soft key list.
Display Mode (Power Profile submenu)
Selects the display presentation with the following horizontal menu choices:
Normal – The display updates continuously.
Freeze – Provides a snapshot of the current display indication and stops additional updates.
Max Hold – The display retains the highest peak signal amplitudes measured during successive sweeps.
Average – The displayed signal amplitudes are a rolling average of the peak amplitudes measured on each
successive sweep. The average consists of 1 to 5 sweeps, shown beside the mode indication. See
Figure
2.2.7.2.3.2-2 .
Marker Mode (Power Profile submenu)
Provides display marker control via a horizontal soft key menu. Markers can be turned off or on with a
choice of numeric readout for the signal measurements. “Absolute” provides actual peak readings while
“Delta” measures the relative difference of both power and time between the markers. See
Figure
2.2.7.2.3.2-2 .
Toggle Marker (Power Profile submenu)
Cycles through the available markers to select the active one (yellow) for positional adjustment on the
display. The active marker is moved using the Left/Right (◄►) cursor control buttons.