Tektronix TDS6404, Руководство по обслуживанию

Страница: 113 / 252

Performance Tests
TDS6000 Series Service Manual
4- 57
3. Confirm reference is within limits for logic levels:
a. Display the test signal:
H
Move the cable from the timer-counter to the CH 1 input through an
adapter.
H
Set the Vertical
SCALE
to 1 V.
H
Use the Vertical POSITION knob to center the display on screen.
b. Measure logic levels:
H
From the button bar, touch MEAS and select the Ampl tab.
H
Touch the High and Low buttons.
H
Touch the Close button.
c.
Check REF OUT output against limits:
CHECK that the CH 1 High
readout is
≥
1.0 volt and that the CH 1 Low readout
≤
0.25 volts.
4. Disconnect the hookup: Disconnect the cable and adapter from the
oscilloscope.
50
Ω
Coaxial cable
Output
Sine-wave
generator
TDS6000 Series
Figure 4- 21: Initial test hookup
5. Install the test hookup and preset the instrument controls:
a.
Initialize the oscilloscope:
Press the DEFAULT SETUP button.
b. Hook up the test-signal source : Connect, through a 50
Ω
precision
coaxial cable, the output of the sine wave generator to CH 1 input
through an adapter (see Figure 4--21).
H
From the button bar, touch
MEAS
and select the
Ampl
tab.
H
Touch the Pk-Pk button.