Wavetek 147 Dokumentacja Pobierz pdf (Strona 111)

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Field Sweeping with the SDA-5000: Considerations for Sweep in the Field

Call up the level screen from the SWEEP screen (Fig. 4-10) by

pressing the soft key above the Frequency Submenu icon.

Press the soft key next to the Reference Level icon on the right

side of the display for manual reference level adjustment. Use

the up or down diamond keys, or the numeric keypad, to enter

the level, and then press Enter. Note the changes in the graph

as you adjust the values.

Fig. 4-17 The Reverse SWEEP Level Screen

Press the Autoscale soft key to auto reference the level. This

automatically sets the scale to a convenient level for optimum

viewing in the center of the screen. You can also perform

autoscaling by pressing the Function and Enter keys.

Press the Scale soft key to adjust the graph’s scaling. Use the

up and down diamond keys to scroll through the values

available (1, 2, 5, and 10 dB/div). Notice what happens to the

display as you change the scale factor. The change takes effect

from the center of the screen.

Press the Level Submenu icon to return to the main SWEEP

menu.

Reverse Noise Screen

The noise screen enables you to check the noise levels in the headend while

you’re in the field. If noise is enabled in the headend, you can get to the main

noise screen (see Fig. 4-18), by pressing the Noise Enable soft key when

you’re running a reverse sweep.

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