Tektronix 1710J Series, Instruction Manual

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Adjustment Procedure
7–14
1710J-Series Waveform Monitors
The component to be adjusted is A3C372.
1. Select the CH A input.
2. Select X5 VERTICAL GAIN.
3. Set the sine wave generator for 50 kHz.
4. Select CH A input, EXT REF, and 1 LINE sweep.
5. Adjust the sine wave generator for a displayed amplitude of 100 IRE (or
700 mV).
6. Set the sine wave generator Frequency to 3.58 MHz (NTSC) or 4.43 MHz
(PAL)
7. Adjust C372 (X5 Comp) for an amplitude of 100 IRE (NTSC) or 700 mV
(PAL).
8. Set the sine wave generator frequency to 6 MHz and check that displayed
amplitude is still 100 IRE,
±
5 IRE (NTSC) or 700 mV,
±
35 mV (PAL).
Components to adjust are A3C777 and A3C3775.
1. Set the 1710J-Series Waveform Monitor sweep to 2 LINE.
2. Use a 75
W
coaxial cable to connect the television test signal generator color
bar signal to the CH A input. Terminate the remaining side of the loop-
through input with a 75
W
terminator.
3. Select input A and LPASS FILTER.
4. Turn on HORIZONTAL MAG and X5 VERTICAL GAIN.
5. Adjust C777 (LPASS Filter) for minimum chrominance (minimum trace
width on the back porch, following color burst).
6. Position the sync pulse to the baseline at center screen.
7. Adjust C775 (LPASS Filter) for the best corner on the leading edge of the
sync pulse.
8. Remove the coaxial cable from the 1710J-Series Waveform Monitor CH A
input. Leave the 75
W
terminator in place.
9. Use a 75
W
coaxial cable to connect the output of the sine wave generator to
the 1710J-Series Waveform Monitor CH A input.
10. Set the sine wave generator for 50 kHz.
11. Adjust the sine wave generator for a display amplitude of 100 IRE (NTSC)
or 700 mV (PAL).
X5 Gain HF Response
Low Pass Filter