Tektronix TDS6404, Руководство по обслуживанию

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Performance Tests
4- 64
TDS6000 Series Service Manual
TDS6000 Series
50
Ω
Coaxial cable
Sine Wave Generator
Output
10X Attenuator
Figure 4- 24: Initial test hookup
2. Confirm the trigger system is within time-accuracy limits for pulse-glitch or
pulse-width triggering (time range
≤
500 n s) :
a. Display the test signal: Set the output of the sine wave generator for a
100 MHz, five-division sine wave on screen. Press PUSH TO
SET 50% .
b. Set the trigger mode: Press the Trigger MODE button to toggle it to
NORMAL .
c.
Set upper and lower limits that ensure triggering: See Figure 4--25.
H
Press the front-panel ADVANCED button and select the A Event
tab; then select width triggering by touching the Width button.
H
Touch the Trig When button and select Inside limits.
H
Touch
Upper Limit
and use the keyboard to set the upper limit to
10 ns: press 10 , then n , and ENTER .
H
Touch Lower Limit and use the keypad to set the lower limit to
2 ns.
d. Change limits until triggering stops:
H
Press PUSH TO SET 50% .
H
While doing the following subparts, monitor the display (it will stop
acquiring) and the front-panel light
TRIG’D (it will extinguish) to
determine when triggering is lost.
H
Use the multipurpose knob to increase the
Lower Limit
readout
until triggering is lost.