Tektronix 070-8462-03, Instruction Manual

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Performance Verification
1735 HD High Definition Waveform Monitor
5–11
8. Check X1 and X5 Vertical Gain
Requirement: With VAR Gain control in detent and 1 V signal applied, the
vertical deflection of the displayed signal should be 1 V peak-to-peak within
a tolerance of
±
1%. X5 Gain within 5% with 200 mV input.
a. Connect a 999.9 mV signal from the VAC to the 1735 HD CH 1A
INPUT. Leave the loop-through unterminated.
b. Select the following settings on the VAC: CHR P-P, NTSC, and Manual.
c. Select 1735 HD CH 1A INPUT (all other input channels off).
d. Check that the peak-to-peak amplitude of the display is 1 V. Measure
from the –0.3 graticule line to the 0.7 graticule line. Tolerance is
±
1%
(10 mV).
e. Repeat steps a. through d. for INPUTs CH2A, CH 3A, CH 1B, CH 2B,
and CH 3B.
f. Connect the VAC signal to the 1735 HD CH1A INPUT.
g. Set the VAC to 200.0 mV and change the 1735 HD Gain to X5.
h. Select the 1735 HD CH 1A INPUT (all other input channels off).
i. Check that the peak-to-peak amplitude of the display is 1 V,
±
5%
(50 mV).
j. Repeat steps f. through i. for INPUTs CH2A, CH 3A, CH 1B, CH 2B,
and CH 3B.
9. Check Calibrator Amplitude
Requirement: Amplitude should be 700 mV within a tolerance of
±
1%.
a. Enter the 1735 HD MENU and select the Calibration signal through the
MENU.
b. Check for a displayed amplitude of 700 mV,
±
1% (7 mV).
c. Press the FIELD button to exit the CALIBRATION mode.
10. Check Vertical Position Range and Variable Gain Range
Requirement: Position Range: 1 V signal can be positioned so that peak
white or sync tip can be placed at blanking level, with Clamp on in any gain
setting. Variable Gain Range = +5 dB, –20 dB
a. Disconnect the VAC signal from the 1735 HD. Connect the TSG 1001
G/Y output to the 1735 HD CH 1A input and terminate the loop-through
in 75
W
.