Tektronix 070-8462-03, Instruction Manual

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Adjustment Procedure
6–18
1735 HD High Definition Waveform Monitor
NOTE . Leave the CH 1B INPUT connected through the end of step 23.
b. Select the 1735 HD CH 1B INPUT.
c. Enter the 1735 HD MENU, select SUBTRACT NO, and exit the
MENU.
d. Set the leveled sine wave generator frequency to 50 kHz and adjust the
amplitude for a 700 mV display on the 1735 HD.
e. Enter the 1735 HD MENU, select SUBTRACT YES, and exit the
MENU.
f. Select the 1735 HD CH 1A INPUT and X5 Gain.
g. Use the VERTICAL Position control to position the trace to a minor
graticule mark at center screen.
h. Check while varying the frequency on the leveled sine wave generator
from 50 kHz to 15 MHz, for less than 5% (22 mV) of residual sine
wave; while varying the frequency from 15 MHz to 30 MHz, for less
than 6% (44 mV) of residual sine wave.
i. Repeat step h. for CH 2A, CH 3A, CH 2B, and CH 3B. Move the
CH 1A leveled sine wave generator input and 1735 HD input selection
accordingly.
j. Disconnect the leveled sine wave generator from the 1735 HD.
k. Enter the 1735 HD MENU, select SUBTRACT NO, and exit the
MENU.
24. Adjust Filter Gain
a. Connect the VAC output to the 1735 HD CH 1A INPUT. Do not
terminate.
b. Set the VAC to 999.9 mV.
c. Select the 1735 HD CH 1A INPUT, FLAT Filter, and ONE LINE
Sweep.
d. Use the VERTICAL Position control to position the traces on the –.3 and
+.7 graticule lines.
e. Enter the 1735 HD MENU, select NOISE FILTER, and exit the MENU.
f. Select FLAT and FILTER together.
g. Adjust A3R577 (Filter DC Position) and A3R84 (Filter Gain) to overlay
the two displays and make the filtered display match the DC level and
gain of the flat display,
±
1% (10 mV).