Using the Menus

Gain Menu

HAny one of three calibrated gain ratios can be selected: X1, X5, or X10. Variable gain is also available, indepen- dent of the other gain settings. When variable gain is on, the left bezel control adjusts the signal gain.

HAudio or Time Code gain is set from the GAIN menu when AUDIO or TIME CODE display is selected. Gain choices are 0 dBu, 4 dBu, 8 dBu, or 12 dBu. Select gain relative to the system under test.

HWhen variable gain is turned off, the instrument returns to the calibrated gain setting. Operator adjustments made with variable gain will be restored when variable gain is selected again.

CRT Menu

HDISPLAY is used for signal and etched graticule adjust- ments. When DISPLAY is selected, the left bezel control adjusts the signal focus (FOCUS), the center bezel control adjusts the etched graticule illumination (SCALE) and the right bezel control adjusts the signal intensity

(INTENSITY).

HREADOUT refers to electronic graticules, markers, menu and measurement readouts. When READOUT is selected, a test pattern containing a vertical line and a horizontal line is displayed. Use the left bezel control (VPOS) and the center bezel control (HPOS) until the lines cross at the center of the etched graticule. This will compensate for minor shifting of markers due to drift or external magnetic fields (particularly if the instrument is moved after the markers are set).

The right bezel control adjusts readout intensity (INTEN- SITY). Readout intensity will not go below the calibrated minimum value when menus are displayed.

HTRACE adjusts trace rotation

Exiting the menu will return the instrument to normal opera- tion, with the new settings in effect.

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1740A/1750A Series Waveform/Vector Monitor User Manual