Tektronix 2467B Service Manual

Adjustment Procedure—2465B/2467B Service
CH 1 POSITION As needed to view both
A and B Sweeps
Horizontal POSITION Position start of trace at
the left graticule line
NOTE
In the following calibration routine some sequen-
tial pairs of steps are iterative, i.e., the earlier
step is recalled if an adjustment is made in the
later step. Occasionally, on the earlier of some of
these pairs, the readout may indicate "LIMIT"
before the correct control setting is reached. If
this occurs, proceed to the next AUTOMATIC
CAL step. After the adjustment at the next step
is performed, the previous step will automatically
be recalled, and the adjustment may be per-
formed in the normal manner.
o. ADJUST—A REF OR DLY POS and A controls to
align both the intensified zones with the 6th time marker
(near graticule center) and to superimpose the delayed B-
ep time markers. Press and release the upper TRIGGER
COUPLING switch.
p. CHECK—CALIBRATOR output voltage is between
398 mV and 402 mV of the reading noted in part j. Discon-
nect the DMM when through.
q. CHECK—Readout indicates ADJ A (step) 2, 100 us
(for A Sweep), and 1 us (for B Sweep).
r. ADJUST—A REF OR DLY POS control to intensify
the 2nd time marker, and ADJUST—A control to intensify
the 10th time marker. Superimpose the delayed B Sweep
time markers within 0.2 division.
s. Press and release the upper TRIGGER COUPLING
switch.
t. CHECK—Readout indicates ADJ A (step) 3, 300 us
(for A Sweep), and 1 us (for B Sweep).
u. ADJUST—A REF OR DLY POS control to intensify
the 4th time marker, and ADJUST—A control to intensify
the 28th time marker. Superimpose the delayed B Sweep
time markers within 1 division.
v. Press and release the upper TRIGGER COUPLING
switch. If the adjustment in step 3 was changed, step 2
will be recalled; otherwise step 4 will be initiated.
w. CHECK—Readout indicates ADJ A (step) 4, 100 us
(for A Sweep), and 1 us (for B Sweep). Set the Time-Mark
Generator for 5 us time markers.
x. ADJUST—A control CCW until no further movement
of the B Sweep display occurs. Note the position of the
1st time marker, then adjust the A control CW until the
2nd time marker moves to the left and aligns with the
position just noted.
NOTE
Movement of the J REF control at this point will
adversely affect the calibration.
y. Press and release the upper TRIGGER COUPLING
switch. Set the Time-Mark Generator for 10 ^s time
markers.
z. CHECK—Readout indicates X1, X10, HRZ CTR,
(step) 5, and 10 us (for A Sweep) and two vertical cursors
appear on the display.
aa. ADJUST—X1 Gain (R860) and Hrz Ctr (R801) to
align the two cursors with the 2nd and 10th vertical grati-
cule lines, then adjust X10 Gain (R850) for 1 time marker
per division.
bb. Press and release the upper TRIGGER COUPLING
switch. Set the Time-Mark Generator for 10 ms time
markers.
cc. CHECK—Readout indicates ADJ, (step) 6, 10 ms
(for A Sweep), and 100 us (for B Sweep).
dd. ADJUST—A REF OR DLY POS control to intensify
the 2nd time marker, and ADJUST—A control to intensify
the 10th time marker. Superimpose the delayed B Sweep
time markers within 0.2 division.
ee. Press and release the upper TRIGGER COUPLING
switch. Set the Time-Mark Generator for 1 us time
markers.
ff. For each step in Table 5-2, do the following:
1. Adjust the A REF OR DLY POS and A controls,
as necessary, to intensify the indicated time
marks on the A Sweep and superimpose the
displayed B Sweep markers within the listed
limits.
5-14

Tektronix 2467B Specifications

General

Brand	Tektronix
Model	2467B
Category	Test Equipment
Language	English