Operator’s Checkout Procedure

12. Audio Display

To obtain an audio display, connect the left and right audio signals to the rear-panel REMOTE connector as follows: +Y to pin 8, -Y to pin 9, +X to pin 10, and -X to pin 11. Select AUDIO display mode.

An audio signal with no phase error appears as a straight line extending from the audio box in the upper right corner of the graticule to the box in the lower left. A signal with phase error appears as an opening in a lissajous waveform. See Figure 2-16.

13. SCH Display (1750A Only)

The SCH display mode provides a vector display of the subcarrier-to-horizontal-sync phase relationship. (SCH measurements appear on page 4-10.)

For NTSC operation, verify that REF is set to internal, then select SCH display mode. This provides a dual-dot display, as shown in Figure 2-17. Select EXT REF. This provides the single-dot display, shown in Figure 2-18.

For PAL operation, the REF selection does not affect the display. A sample PAL display is shown in Figure 2-18.

Figure 2-16. Audio display with phase error.

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

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