Tektronix 1730 Series, Instruction Manual

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1730–Series Checks and Adjustments
5–40
a. Set the 1730–Series SWEEP rate to 2LINE.
b. Turn off DC REST.
c. Connect color bar signal to the CH–A INPUT.
d. Select INPUT A and LPASS FILTER.
e. Turn on HORIZONTAL MAG and X5 VERTICAL GAIN.
f. ADJUST – C777 (LPASS Filter) for minimum chrominance (minimum
trace width on the back porch, following color burst).
g. Position the sync pulse to the baseline at center screen.
h. ADJUST – C775 (LPASS Filter) for the best corner on the leading edge
of the sync pulse.
Perform parts i. through m. for dual-standard waveform monitors only.
i. Connect the output of the sine wave generator to the 1730–Series CH–A
INPUT.
j. Set the sine wave generator for 50 kHz.
k. Adjust the sine wave generator for an amplitude, on the 1730–Series, of
100 IRE (700 mV).
l. Set the sine wave generator Frequency to 4.00 MHz.
m. Re-adjust C777 for minimum chrominance.
21. Adjust Chroma Filter
a. Connect a color bar signal to the 1730–Series CH–A INPUT.
b. Set the color bar generator for Full Field and turn off Luminance (Y) and
Setup. Set color bar amplitude to 75%.
c. Set the 1730–Series to CH–A, FLAT FILTER, 1LINE SWEEP, DC
REST OFF, VERTICAL GAIN VAR, and SWEEP MAG off.
d. Use the 1730–Series VAR to set the displayed amplitude of the largest
color bar packet to be from blanking level to peak white (100 IRE for
NTSC and PAL–M, or 700 mV for PAL).
e. Change 1730–Series FILTER to CHRM.
f. ADJUST – R683 (NTSC and PAL–M Chroma Filter Gain) or R680
(PAL Chroma Filter Gain) so that the amplitude of the largest color
packet is again 100 IRE or 700 mV, depending on the color standard