Vertical - Tektronix 2215A Instruction Manual

Adjustment Procedure— 2215A Service
Equipment Required (See Table 4-1):
Calibration Generator (Item 1)
Leveled Sine-Wave Generator (Item 2)
50-ft BNC Cable (Item 4)
50-ft BNC Termination (Item 5)
Dual-Input Coupler (Item 6)
See
INITIAL CONTROL SETTINGS
Vertical (Both Channels)
POSITION
VERTICAL MODE
BW LIMIT
VOLTS/DIV
VOLTS/DIV Variable
INVERT
Input Coupling
Horizontal
POSITION
HORIZONTAL MODE
A SEC/DIV
SEC/DIV Variable
X I0 Magnifier
A TRIGGER
VAR HOLDOFF
Mode
SLOPE
LEVEL
A&B INT
A SOURCE
A EXT COUPLING
5-6

VERTICAL

A. ADJUSTMENT LOCATIONS 1
at the back o f this manual for locations o f test points and adjustments.
Midrange
CH 1
On (button in)
5 mV
CAL detent
Off (button out)
GND
Midrange
A
0.5 ms
CAL detent
Off (knob in)
NORM
P-P AUTO
OUT
Midrange
VERT MODE
INT
AC
10X Attenuator (Item 7)
Adapter (Item 9)
Screwdriver (Item 13)
Low-Capacitance Alignment Tool (Item 14)
10X Probe (included with instrument)
5 1 and and AD' ADJUSTMENT LOCATIONS 2
PROCEDURE STEPS
1. Adjust Attenuator Step Balance (RIO and R60)
a. Position the trace on the center horizontal graticule
line using the Channel 1 POSITION control.
b. ADJUST— Ch 1 Step Bal (RIO) to set the trace on the
center horizontal graticule line.
c. Set the CH 1 VOLTS/DIV switch to 50 mV.
d. Repeat parts a through c until there is no trace shift
when changing the CH 1 VOLTS/DIV switch from 50 mV to
5 mV.
e. Set the VERTICAL MODE switch to CH 2.
f. Repeats parts a through d for Channel 2, adjusting
Ch 2 Step Bal (R60) in part b.
2. Adjust 2/5 mV DC Balance (R33 and R83)
a. Set the CH 2 VOLTS/DIV switch to 5 mV.