Tektronix WFM601, Service Manual

Page: 102 / 304

Performance Verification
4–14
WFM 601 - Service Manual
i. Horizontally and vertically position the display over the center 8
divisions of the graticule 0 line.
j. CHECK – for 8 divisions of deflection 0.4 minor divisions.
12. Check Vector Mode Bandwidth Matching
REQUIREMENT – Horizontal-to-Vertical Bandwidth Matching: 2
°
loop
opening at 500 kHz or 2 MHz.
a. Select the multiburst signal from the serial digital component Generator.
(It is located under the multipulse signal graphic; it toggles with the
multipulse signal when the button is pushed.)
b. Turn on generator R–Y.
c. CHECK – that there is less than a trace width of loop opening.
13. Check Vector Registration
REQUIREMENT – 0.25 box with the X1 color black dot centered in box.
a. Center the color black dot, with the HORIZ and VERT POS controls in
the center box.
b. Enter the GAIN menu and select X5.
c. CHECK – that the color black dot is within
1
/
4
inch of the center of its
box.
d. Change the vertical gain (GAIN menu) to X10.
e. CHECK – that the color black dot is within
1
/
2
inch of the center of its
box.
14. Check Lightning Mode
REQUIREMENT – Y displayed on vertical axis, B–Y displayed horizontally
on top half of the display, R–Y displayed horizonatally on the bottom half of the
display. Vertical Gain Accuracy:
2%.
a. Select the color bar signal from the serial digital component generator.
b. Turn on the LIGHTNING VIDEO DISPLAY.
c. Turn off the generator B–Y and R–Y channels.
d. CHECK – that the signal vertical amplitude is 10 divisions 1 minor
division (–.3 to .7).
e. Turn on generator B–Y and R–Y channels.