Tektronix 1740A/1750A Manuel d'utilisateur télécharger pdf (Page 53)

Operator’s Checkout Procedure

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

2-23

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.

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Tektronix 1740A/1750A Manuel d'utilisateur Page 53