TB 9-6625-2173-24
b. Adjustments
fastest flat top waveform in the first 100 ns.
(2) Adjust R2321, C2321, and C2343 (fig. 8) for the fastest flat top waveform in the
first 30 ns.
(3) Repeat adjustments above as necessary.
(4) Adjust C1447, R1455 GAIN 1, and C1527 (fig. 6) for the fastest flat top
waveform in the first 100 ns.
31. Vertical Bandwidth
a. Performance Check
(1) Set TRIGGER SOURCE to LINE.
(2) Press PULL X10 HORIZ MAG switch to in position than set SECONDS/DIV
switch to 1m, and horizontal POSITION control to midrange.
(3) Ensure oscilloscope calibrator SOURCE/MEASURE CHAN 1 is connected to TI
CH1 using a 50 : termination.
(4) Set oscilloscope calibrator LEVEL SINE output frequency to 50 kHz and a
reference amplitude of 6 divisions on TI crt.
(5) Change oscilloscope calibrator LEVEL SINE frequency to 80 MHz.
(6) If the display amplitude is not 4.2 major divisions or greater, repeat checks and
adjustments in paragraph 30 above.
(7) Set DISPLAY switch to CH 2 and set oscilloscope calibrator output to CHAN 2.
(8) Repeat (4) through (6) above for CH 2, ensuring use of 50 : termination.
b. Adjustments. No further adjustments can be made.
32. External Trigger Sensitivity
a. Performance Check
(1) Set CH 1 and CH 2 VOLTS/DIV switch to 1.
(2) Set SECONDS/DIV switch to 50n and TRIGGERING SOURCE to EXT.
(3) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 to TI EXT
TRIG input using a 50 : termination.
(4) Set oscilloscope calibrator LEVEL SINE output for 0.060 V, 30 MHz on CHAN 1.
(5) Press in and hold DISPLAY TRIG VIEW pushbutton and adjust INTEN and
FOCUS controls for suitable viewing.
(6) While holding DISPLAY TRIG VIEW pushbutton in, verify a stable display can
be obtained by adjusting the TRIGGERING LEVEL control.
(7) Set oscilloscope calibrator LEVEL SINE output for 0.150 V, 80 MHz.