Wavetek 147 Spécifications télécharger pdf (Page 137)

Measuring System Performance: Measuring Signal Levels

113

Tilt Compensation

The Tilt compensation feature allows you to enter the cable loss for a

particular section of coax and then, using the scan display, you can adjust

the gain of the amplifier to compensate for this loss. You can turn Tilt

compensation on or off in the TILT submenu.

The SDA-5000 enables you to designate up to nine Tilt channels.

See Also

½ "Edit Channel Plan" in Chapter 3 explains how to designate

Tilt channels (page 43).

The slope for tilt is a straight line from the lowest (in frequency) to the

highest designated tilt channel. The low and high frequency channels are

the pilot channels. Pilot carriers’ levels establish the slope of the tilt graph

that you see on the LCD.

You can enter Tilt measurement mode through the Navigator menu or by

pressing the Tilt mode key.

Fig. 6-3 shows the TILT screen. Use the LO and HI soft keys to select the LO

and HI pilot channels for your Tilt adjustment.

Use the icons in this screen as follows:

The LO or HI icons will darken when either is selected.

Pressing this icon brings up the following three useful functions,

then returns the main TILT menu.

Reference Level allows you to use the up and down diamond

keys to make discrete adjustments to the reference level within

in pre-set range(+/-).

Scale allows you to adjust the dB/div on the vertical scales,

using the up and down diamond keys to scroll through the pre-

set values for best presentation on the screen.

Establishes an optimized Autoscale presentation, based on the

previous two settings.

NOTE: The Reference Value level is limited by the units

selected and the Scale setting.

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Wavetek 147 Spécifications Page 137