Using the Menus

If it becomes necessary to compensate for minor shifting of markers due to drift or external magnetic fields (particularly if the instrument is moved after the markers are set), enter the CRT menu and select READOUT. Use the bezel controls to adjust vertical position (VPOS) and horizontal position (HPOS) until the center of the displayed test pattern is at the center of the graticule.

With Waveform Display

Voltage Cursors can be used to make accurate signal amplitude measurements. With VOLT selected, use the left bezel control to position the VOLT1 cursor at the upper excursion of signal to be measured, and the center bezel control to position the VOLT2 cursor at the lower excursion. The on-screen readout gives the voltage difference between the two levels.

When GAIN is changed, the voltage cursors maintain their relationship with the signal. For example, if the VOLT2 cursor were set to the signal sync tip in X1 GAIN, it would also be at sync tip in X5 gain, X10 gain, or with VAR gain on.

Timing Cursors can be used to make accurate time measure- ments. When TIME is selected, position the TIME1 cursor at the left excursion of the signal to be measured, and the TIME2 cursor on the right. The on-screen readout gives the time difference between the two points.

When MAG is selected, the timing cursors maintain their relationship with the signal. For example, if the VOLT1 cursor were set to the rising edge of sync, it would also be set there with MAG selected.

Markers. When MARK is selected, use the bezel controls to vertically position the markers where desired with respect to the graticule markings. These markers are designed to be used for reference points; there is no amplitude readout. The markers are not affected by GAIN changes; if a marker were set to 100 IRE in X1 GAIN, it would still be set to 100 IRE with the MAG on.

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

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