Tektronix 2445A - Vertical

Performance Check-2445A/2455A Service
VERTICAL
Equipment Required (see Table 4-1)
Power Supply (item 1)
Primary Leveled Sine-Wave Generator (Item 2)
Calibration Generator (Item 3)
Secondary Leveled Sine-Wave Generator (Item 4)
1 OX Probe (supplied with oscilloscope) (Item 7)
Precision 50 þÿ©BNC Cable (Item 9)
50 þÿ©BNC Cable (Item 10)
Dual-Input Coupler (Item
11)
INITIAL CONTROL SETTINGS
Control settings not listed do not affect the procedure.
a. Set:
NOTE
Select channels to set VOL TS/DIV.
VOLTS/DIV
CH 1 and CH 2
CH 1 and CH 2 VAR
CH 3 and CH 4
VERTICAL MODE
1 V
In detent
0.1V
CH 1 On
CH 2, CH 3, CH 4,
ADD, and INVERT Off
CHOP/ALT VERTICAL
MODE ALT
20 MHz BW LIMIT Off
Input Coupling
CH 1 and CH 2
HORIZONTAL
A SEC/DIV
SEC/DIV VAR
X10 MAG
TRACE SEP
4-4
1 þÿM© GND
10 ms (knob in)
In detent
Off
Fully CW
50 þÿ©BNC Termination (Item
12)
Subminiature Probe Tip-to-BNC Adapter (Item 13)
BNC Female-to-BNC Female Adapter (Item 14)
BNC Female-to-Dual Banana Adapter (Item 15)
2X Attenuator (Item 16)
5X Attenuator (Item 17)
10X Attenuator (Item 18)
Delta
þÿ”t and þÿ”v
TRACKING
TRIGGER
HOLDOFF
LEVEL
SLOPE
A/B TRIG
MODE
SOURCE
COUPLING
Off (press
and release until
associated readout is off)
Off
Fully CCW
Midrange
+ (plus)
SELECTA
AUTO LVL
VERT
DC
1. Verify CH 1 and CH 2, 50 þÿ© OVERLOAD
protection.
a. Connect the Power Supply to the CH 1 OR X input
connector via a 50 þÿ©  BNC cable and a
BNC female-to-dual
banana adapter.
b. Using the CH 1 VERTICAL POSITION control, posi-
tion the trace on the bottom horizontal graticule line.
c. Change CH 1 Input Coupling to 1 þÿM©  DC.
d. Turn the Power Supply on.
e. Adjust the Power Supply output level until the CH 1
trace rises to 1 division above the center graticule line
(+5 V).