Tektronix 2445A - Additional Functional Verification

Performance Check-2445A/2455A Service
ADDITIONAL FUNCTIONAL VERIFICATION
Equipment Required (see Table 4-1)
1 OX Probe supplied with Oscilloscope (Item 7)
INITIAL CONTROL SETTINGS
Control settings not listed do not affect the procedure.
a. Set:
NOTE
Select channels to set
VOL TS/DIV.
VERTICAL
CH 1 and CH 2
VOLTS/DIV
CH 1 and CH 2 VAR
CH
3 and CH 4
VOLTS/DIV
CH 1, CH 2, CH 3,
CH 4, ADD, and
INVERT
CHOP/ALT
20 MHz BW LIMIT
CH 1 and CH 2
Input Coupling
HORIZONTAL
A SEC/DIV
SEC/DIV VAR
X10 MAG
TRACE SEP
Delta
av and rn
TRACKING
TRIGGER
HOLDOFF
LEVEL
SLOPE
A/B TRIG Select
MODE
SOURCE
COUPLING
0.1 V
In detent
0.1 V
Off
ALT
Off
1 MO DC
1 ms (knob in)
In detent
Off
Fully CW
Off (press and release
until associated
readout is Off)
Off
B ENDS A (fully CW)
Midrange
+ (plus)
A
AUTO
VERT
DC
1. Verify ALT, CHOP, and ADD Modes and TRACE
SEP.
a. VERIFY-CH 1 trace is visible with no VERTICAL
MODE buttons selected.
b. Press the CH 2 VERTICAL MODE button.
c. VERIFY-CH 1 trace is not displayed and the CH 2
trace is displayed.
d. Press the
CH 1 VERTICAL MODE button.
NOTE
Separate the traces
by approximately 1 division
using the VERTICAL POSITION controls. Do
not
position either trace precisely at graticule center.
e. VERIFY -Both the CH 1 and the CH 2 traces are
displayed.
f. Press the ADD button.
g.
VERIFY-A third trace (ADD) is displayed.
h. Press the CH 3 VERTICAL MODE button.
i. VERIFY-The CH 3 trace is added to the display.
j. Press the CH 4 VERTICAL MODE button.
k.
VERIFY-The CH 4 trace is added to the display.
I. Set the SEC/DIV controls to 50 ms (knob in).
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