Tektronix 1740A/1750A manual 48

Operator’s Checkout Procedure

Select F+L+C (FLAT plus LUM plus CHROM). The display is similar to the F+L display, with the chrominance-filtered signal added on the right.

Select DIFF. Select the generator 5-step staircase signal. The differentiated-step filtered display appears similar to Figure 2-9.

Select R---Y. This provides a demodulated chrominance-versus -time display. Use the right bezel control to adjust vector phase. See Figure 2-10.

Select SCH R---Y(1750A only). This provides a demodulated SC/H sync-locked oscillator display, useful for viewing SC/H variations versus time. A sample NTSC display is shown in Figure 2-11. NTSC signals can be viewed in either line or field sweeps. For PAL applications, view the signal in two-field sweep (see Figure 2-12). Use the right bezel control to adjust vector phase.

Exit the FILTER menu. Enter the menu again and note that the filter selections are unchanged. Select FLAT. Exit the menu.

10S/DIV

FLAT

LUM

CHROM

DIFF

R-Y

SCH R-Y

F+L

F+L+C

Figure 2-9. Two-Line DIFF filter display of 5-step staircase signal.

2-18 1740A/1750A Series Waveform/Vector Monitor User Manual