Performance Tests
4-70
TDS7104 & TDS7054 Service Manual
Sine wave
generator
To AUX IN and 50 Ω
terminator
TDS7000 oscilloscope
Figure 4- 31: Initial test hookup
2. Confirm the trigger system is within sensitivity limits (50 MHz):
a. Display the test signal:
H Set the generator frequency to 50 MHz.
H From the button bar, touch MEAS.
H Touch Setup Ref Levs; then touch the Min-Max button.
H Touch the Setup button and select the Ampl tab; then touch the
Amplitude button.
H Touch Close.
H Press PUSH TO SET 50%.
H Set the test signal amplitude for about three and a half divisions on
screen. Now fine adjust the generator output until the CH 1
Amplitude readout indicates the amplitude is 350 mV. Readout may
fluctuate around 350 mV.
H Disconnect the 50 Ω precision coaxial cable at CH 1 and reconnect
it to CH 1 through a 10X attenuator.
b. Check the Main trigger system for stable triggering at limits:
H Read the following definition: A stable trigger is one that is
consistent; that is, one that results in a uniform, regular display
triggered on the selected slope (positive or negative). This display
should not have its trigger point switching between opposite slopes,
nor should it roll across the screen. At horizontal scale settings of
2 ms/division and faster, TRIG’D will remain constantly lighted. It
will flash for slower settings.
H Press the Trigger Slope button to select the positive slope.
To Next Page
Loading...
Need help?
General
