Adjustment Procedure—2465B/2467B Service
hh.
Press and release the upper TRIGGER COUPLING
switch (step 4). Move the test signal to CH 2 and
ADJUST amplitude for 5 division signal.
ii.
ADJUST—A until CH 2 waveform best matches that
noted in step ff above.
jj.
Press and release the upper TRIGGER COUPLING
switch (step 5). Connect the test signal to CH 1 through
2X, 2.5X, and 5X attenuators. ADJUST A for best front
corner.
kk. Press and release the upper TRIGGER COUPLING
switch (step 6). Remove 2.5X attenuator. ADJUST A for
best corner.
NOTE
The 5 mV response should have a 4-5% front corner
spike to maintain correct bandwidth.
II.
Press and release the upper TRIGGER COUPLING
switch (step 7). Remove 5X attenuator. ADJUST genera-
tor for a 5 division signal. ADJUST A for best corner.
mm.
Press and release the upper TRIGGER
COU-
PLING switch (step 8). Adjust generator for 5 division
sig-
nal.
ADJUST A for best corner.
nn.
Press and release the upper TRIGGER COUPLING
switch (step 9). Adjust high amplitude generator for 5
divi-
sion signal. ADJUST A for a front corner spike of 6 to 7%.
This is necessary to have the 10X bandwidth (0.1V - 0.5V)
be similar to the 10 mV bandwidth.
NOTE
Generator amplitude for the 500 mV step will be
approximately 2 divisions and the amplitude for the
1 V step will be approximately 1 division.
oo.
Press and release the upper TRIGGER COUPLING
switch (step 10). Remove 2X attenuator. ADJUST A for
best corner. Continue through cal step 12 as above.
pp.
Press and release the upper TRIGGER COUPLING
switch.
Steps 13 and 14 are automatically calibrated.
Con-
nect test signal to CH 2 via 2X, 2.5X, and 5X attenuators
and adjust for 5 division signal. ADJUST A for best corner.
qq.
Repeat steps kk through oo for CH 2
(steps 16-22).
rr. Steps 23 and 24 are automatically calibrated after
step 22.
ss.
Disconnect the generator from the CH 2 input.
tt.
CHECK—Readout indicates VERT CENTER GAIN.
uu.
ADJUST —Gain (R638) and Vertical Centering
(R639) to align the cursors with the dotted 0% and 100%
graticule markings.
vv. Press and release the upper TRIGGER COUPLING
switch to conclude the calibration routine.
CAL 07—READOUT CENTERING AND GAIN
7. Check/adjust Readout Centering and Gain
(R2918 R2931)
a. Scroll to CAL 07.
b. Press and release the upper TRIGGER COUPLING
switch to initiate the routine.
NOTE
The 2465B has stationary 8s in the top row and
BWL characters in the bottom row of the readout.
c. CHECK—Readout displays large 8 characters mov-
ing in the top line and BWL characters moving in the bot-
tom line.
d.
ADJUST—Readout Centering (R2918) and Gain
(R2931) so characters remain just inside the graticule area.
e. Press and release the lower TRIGGER COUPLING
switch.
5-22
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