TB 9-6625-2293-24
VERTICAL MODE CH 1 and CH 2 to on.
(a)
VERTICAL MODE CH 3 and CH 4 to off.
(b)
ADD, INVERT, and BW LIMIT to off.
(c)
ALT/CHOP to ALT.
(d)
TRIGGER SLOPE to + (plus).
(e)
TRACKING/INDEP to INDEP.
(f)
ΔV to on (RATIO readout).
(g)
(2) Set corresponding switch up or down for indications as listed in (a) through (d) below:
TRIGGER MODE to AUTO LVL.
(a)
TRIGGER SOURCE to VERT.
(b)
TRIGGER COUPLING to DC.
(c)
CH 1 and CH 2 input coupling to 50 Ω DC.
(d)
(3) Position corresponding controls for indications as listed in (a) through (m) below:
(a) CH 1 and CH 2 VOLTS/DIV to 10 mV.
(b) CH 1 VAR ccw (out of detent).
(c) CH 2 VAR cw to detent.
(d) CH 1 and CH 2 VERTICAL POSITION to midrange.
(e) A and B SEC/DIV to 20 ns (knobs locked).
(f) A and B SEC/DIV VAR to detent.
(g) Horizontal POSITION to midrange.
(h) TRIGGER LEVEL to midrange.
(i) TRIGGER HOLDOFF to detent.
(j) ΔREF OR DLY POS and Δ to place cursors near the 3d line above and 3d
line below graticule center (6 division spacing).
(k) INTENSITY control to left of center.
(l) READOUT INTENSITY to right of center.
(m) FOCUS for best focused display.
NOTE
Crt termination, high frequency transient response, vertical
gain, vertical centering, and readout jitter adjustments are
interactive.
This procedure optimizes these adjustments
together.
(4) Press CH 2 pushbutton off and adjust CH 1 VOLTS/DIV VAR control for a
RATIO readout.
(5) Adjust ΔREF OR DLY POS control ccw until RATIO readout is constant
(>130 percent).
(6) Adjust Δ control until readout display indicates 130.0 percent.
(7) One cursor should be near bottom horizontal graticule line and the other cursor
near dotted graticule line marked 100(percent).
(8) Adjust ΔREF OR DLY POS control until the readout displays 100.0 percent.
Cursors should now be on or near dotted graticule lines marked 0 percent and 100 percent.
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