TB 9-4931-538-40
(20) Repeat (14) through (18) above for Channel 3.
(21) Loosen the connection where the S and U cables connect together, and move the
semi-rigid cable from Channel 3 to Channel 4. Press SYSTEM CONTROL CLEAR
DISPLAY pushbutton and retighten the connection where the semi-rigid S and U cables
join together.
(22) Repeat (14) through (18) above for Channel 4.
(23) Loosen the connection where the S and U cables connect together, and move the
semi-rigid cable from Channel 4 to External Trigger Input.
Press SYSTEM
CONTROL/CLEAR DISPLAY pushbutton and retighten the connection where the semi-
rigid S and U cables join together.
(24) Set the NORMALIZED RISETIME to Filter Risetime = 100 ps and Rho
limits for 10%. Repeat (14) through (18) above for external trigger.
(25) Remove the semi-rigid S and U cables from TI and connect the precision short to
Channel 1 input.
(26) Press Wfm Save key. Press WAVEFORM MEMORY key until 1 is highlighted
and press Display key until Off is highlighted.
(27) Press Channels key and set OFFSET to Offset = 0.000 V. Press Timebase
key and set TIME/DIV to Sweep Speed = 2.00 ns/div.
(28) Press Delta V key and overlay both V markers on Channel 1.
(29) Press MARKER1 POSITION key and overlay this marker on the center of
the trace.
(30) Press MARKER2 POSITION key and overlay this marker on the highest
portion of the ringing that occurs near the center of the display and is greater than
MARKER1.
(31) The V value will be less than 10 mV (+5%).
(32) Reposition MARKER2 to the lowest position of the ringing that occurs near the
center of the display and is less than MARKER1.
(33) The absolute value of Delta V should be <10 mV (+5%).
b. Adjustments. No further adjustments can be made.
a. De-energize and disconnect all equipment and reinstall protective cover on TI.
b. Annotate and affix DA label/form on accordance with TB 750-25.