Performance Tests
TDS 500D, TDS 600C, TDS 700D & TDS 714L Performance Verification and Specifications
1–57
b. Hook up the pulse generator (see Figure 1–14 on page 1–56):
H Connect the pulse generator output to a 50 W precision coaxial cable
followed by a 90°right-angle female to male BNC adapter, then
a 50 W 2X attenuator. The attenuator is connected to one side of the
female BNC T connector. The other side of the BNC T is connected
to BNC male to SMA adapter. The SMA side is connected to
male side of the SMA T connector. (Keep the distance between the
BNC T and SMA T as short as possible). Connect 20 inch 50 W
coaxial cables to each female side of the SMA T connector. Connect
a female to female SMA adapter to both male coaxial connectors.
Connect the SMA short, to the remaining female SMA adapter. Now
connect the male BNC T connector to CH 1.
H Set the pulse generator output for a positive-going pulse with a
rise–time as shown in Table 1–6 on page 1–58 for your oscilloscope,
and for the fastest possible rep rate (at least 1 kHz).
H Set the pulse generator output for about 500 mV. (This amplitude
can be adjusted later to get a 5–division pulse on screen.)
c. Modify the initialized front-panel control settings:
H (This substep is not required on the TDS694C or TDS794D.) Press
VERTICAL MENU. Press the main-menu button Coupling, then
press the side-menu W button to toggle it to the 50 W setting.
H Press AUTOSET. You may see both positive and negative pulses.
Adjust the trigger MAIN LEVEL knob so the trigger level is about
50% of the rising edge of the positive pulse.
H (TDS 500D/700D/714L only.) Press SHIFT; then press ACQUIRE
MENU. Press the main-menu button Repetitive Signal, then press
the side-menu OFF (Real Time Only).
H Set the horizontal SCALE of the Main time base to 2 ns/division.
The pulse width should be about 6 ns.
H Adjust pulse amplitude and oscilloscope vertical scale and position
as necessary to obtain about 5 divisions of the positive pulse.
d. Set up for statistics measurements:
H Re-adjust the trigger MAIN LEVEL knob so the trigger level is
about 50% of the rising edge of the positive pulse.
H Press RUN/STOP button to freeze the display.
H Press MEASURE to bring up the Measure menu.
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