Adjustment Procedure-2445A/2455A Service
NOTE
The
readout prompts
the
operator
by
showing to
which connector the input signal should
be applied
(upper left comer), the amplitude
of
that signal
(upper center), and the autocal step number (upper
right comer). An example (from step d
above)
Is:
CH1
500mV
215
e. Connect a 0.5-V standard-amplitude signal from the
Calibration Generator
to
the
CH
1
OR
X input connector
via a
50-0 BNC
cable.
f.
Press
and
release the upper TRIGGER COUPLING
switch.
g.
CHECK-Readout indicates
CH
1,
500
mV,
and
(step) 216.
h.
Press
and release the upper TRIGGER COUPLING
switch.
i.
CHECK-Readout indicates
CH
2,
500
mV,
and
(step) 217.
j.
Move the signal to the
CH
2 input connector. Press
and
release
the upper
TRIGGER
COUPLING switch.
k.
CHECK-Readout indicates
CH
3, 500
mV,
and
(step) 218.
I.
Move the signal to the
CH
3 input connector. Press
and
release
the upper TRIGGER COUPLING switch.
m.
CHECK-Readout indicates
CH
3,
2V,
and
(step)
219.
n. Change the generator output
level
to 2
V,
then press
and
release the upper
TRIGGER
COUPLING switch.
o.
CHECK-Readout indicates
CH
4,
500
mV,
and
(step) 220.
p. Move the signal to the
CH
4 input connector
and
change the generator output
level
to 0.5
V.
Press
and
release
the upper TRIGGER COUPLING switch.
5-16
q.
CHECK--Readout indicates
CH
4,
2V,
and
(step)
221.
r.
Change the generator output level to 2
V,
then press
and
release the upper TRIGGER COUPLING switch.
s.
Disconnect the test setup.
CAL
04-CH
2 DELAY ENABLE/DISABLE
4.
Check/
Adjust CH 2 Delay Enable/Disable.
a.
Scroll to CAL 04.
b.
Press
and release the upper TRIGGER COUPLING
switch
to
initiate the routine.
c.
CHECK-Readout alternately indicates "ENABLED"
and
"DISABLED"
each
time the upper TRIGGER COU-
PLING switch
is
pressed and released.
d.
Leave
the readout display indicating "ENABLED".
Press and release the A/B TRIG button to exit the routine.
e.
Connect a 100-kHz, positive-going signal from the
Calibration Generator fast-rise output to the
CH
1
OR
X
and
CH
2 input connectors
via
a 50-0 BNC cable, a
5X
attenuator,
and
a Dual-Input Coupler.
f.
Set:
VERTICAL
CH
1
and
CH
2
CH1andCH2
VOLTS/DIV
CH
1
and
CH
2
Input Coupling
HORIZONTAL
A SEC/DIV
TRIGGER
SOURCE
MODE
COUPLING
SLOPE
On
10
mV
50 0
DC
10
ns
(knob
in)
CH
1
AUTO
LVL
DC
+ (plus)
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