Initial Control Seltings; Procedure Steps; Vertical; Adjust Attenuator Step Balance - Tektronix 2235A Instruction Manual

Adjustment Procedure
-
2235A lnstructlon
VERTICAL
Equipment Required (See Table 4-1):
Calibration Generator Dual-Input Coupler
Leveled Sine-Wave Generator
1 O X Attenuator
50-h BNC Coaxial Cable Adapter
50-h BNC Precision Coaxial Cable
Alignment Tool
50-h BNC Termination
1 O X Probe (included with instrument)
See ADJUSTMENT LOCATIONS
1
and
ADJUSTMENT LOCATIONS
2
at the back of this manual for locations of test points and adjustments.
INITIAL CONTROL SElTINGS PROCEDURE STEPS
Vertical (Both Channels)
POSITION
MODE
BW LIMIT
INVERT
VOLTSIDIV
VOLTSIDIV Variable
Input Coupling
Horizontal
POSITION
MODE
A SECIDIV
SECIDIV Variable
XI 0 Magnifier
A TRIGGER
VAR HOLDOFF
Mode
SLOPE
LEVEL
A & B SOURCE
A COUPL
A EXT COUPL
Midrange
b.
CH 1
Off (button out) c.
Off (knob in)
50 mV
CAL detent d.
AC
e.
Midrange
A
0.5 ms
CAL detent
Off (knob in)
NORM
P-P AUTO
OUT
Midrange
VERT MODE
NORM
AC
Adjust Attenuator Step Balance (R10 and R60)
Position the trace on the center horizontal graticule
line using the Channel 1 POSITION control.
Set the CH 1 VOLTSIDIV switch to 5 mV.
ADJUST- CH 1 Step Atten Bal (R10) to set the trace
on the center horizontal graticule line.
Set the CH 1 VOLTSIDIV switch to 50 mV.
Repeat parts a through d until there is no trace shift
when changing the CH 1 VOLTSIDIV switch from
50 mV to 5 mV.
Set the Vertical MODE switch to CH 2.
Repeat parts a through e for Channel 2, adjusting
Ch 2 Step Atten Bal (R60) in part c.
Adjust 215 rnV DC Balance (R33 and R83)
Set the CH 2 VOLTSIDIV switch to 5 mV.
Position the trace on the center horizontal graticule
line using the Channel 2 POSITION control.
Set the CH 2 VOLTSIDIV switch to 2 mV.
ADJUST-CH 2 215 mV Dc Bal (R83) to set the trace
on the center horizontal graticule line.
Repeat parts
a
through d until there is no trace shift
when changing the CH 2 VOLTSIDIV switch from
5 mV to 2 mV.
Scans
by ARTEK MEDLQ
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