Tektronix 1730 Series, Instruction Manual

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1730–Series Checks and Adjustments
5–41
employed. For dual-standard waveform monitors, make both the NTSC
and PAL adjustments, using the appropriate signal generator.
g. ADJUST – C683 (3.58 NTSC and PAL–M) or C778 (4.43 PAL) for the
squarest envelope (minimum burst envelope decay time). It may be
necessary to readjust C783 (NTSC or PAL–M) or C784 (PAL) for
maximum amplitude. For dual-standard waveform monitors, make both
adjustments, using the appropriate signal generator.
h. It may be necessary to perform parts f. and g. several times before
reaching the optimum setting for both Gain and Chroma Filter Com-
pensation.
i. Turn off VAR GAIN
j. Turn on Color Bar Luminance.
22. Adjust Readout Position
a. Select FLAT FILTER and 2LINE SWEEP for the 1730–Series.
b. Set the 1730–Series FOCUS control for optimum display definition.
c. Select LINE SELECT ON and LINE 19 (CRT readout).
d. Set the front panel Readout to midrange.
e. Position the display to overlay the waveform blanking level on the CRT
blanking level line, and position the center sync pulse on the sync
amplitude measurement scale.
f. ADJUST – R209 (Y-Axis Position) so that the 19 in the readout is just
above the peak white graticule line (110 IRE or 1.10 V).
g. Turn off the Line Select.
23. Adjust CRT Bias and Line Select Focus
a. Turn the INTENSity control fully counterclockwise.
b. ADJUST — A1R58 (CRT Bias) until the display just disappears.
c. Turn LINE SELECT ON, line 19.
d. Adjust the front panel INTENSity control fully clockwise.