Tektronix 5103N

SECTION
S
CALIBRATION
5103N
Change information, if any, affecting
this
section
will be
found
at the
rear of the manual.
Introduction
Before complete
calibration, thoroughly
clean and
in-
spect this instrument as
outlined in the Maintenance
section
of this manual.
NOTE
This procedure facilitates
checking
and adjusting the
Low-Voltage Power Supply ONLY. For complete
oscilloscope
mainframe calibration (plug-in interface,
deflection amplifiers, CRT circuits, etc.), refer
to
the
calibration procedure given in the manual
for
the dis-
play unit.
Services
Available
Tektronix,
Inc.
provides complete instrument repair
and
calibration
at
local Field
Service Centers
and at
the Factory
Service Center. Contact
your local Tektronix Field Office
or
representative for
further information.
Equipment
Required
For power-supply
calibration, proper loading must be
established to
ensure correct
operation and regulation of
the low-voltage
supplies. For
best results, the 5103N should
be operated with a
display unit and plug-in units because
this provides
actual
operating-condition loads
for
the
supplies.
For measurement
of the supply
voltages,
a
precision DC
voltmeter is required.
The
voltmeter must have an accuracy
of within
±0.1%,
and a
measurement range from about
—35
volts to
+250
volts. For
example, a
Fairchild Model
7050
Digital Multimeter, a
Tektronix 7D13 Digital
Multimeter
(operated
with
a
Tektronix
7000-Series Readout Oscillo-
scope), or any
DC
voltmeter meeting the
listed require-
ments may be
used.
Preliminary
Procedure
NOTE
The
performance
of this
instrument can be
checked
at any
temperature
within
the
0° C
to +50° C range.
Make any
adjustments at a
temperature
of
+25°
C,
±5°
C.
a.
Remove
the bottom dust
cover of
the 5103N
to gain
access
to the power
supply circuit
board. If
necessary,
set
the line-selector
block
in accordance
with
the line
voltage
source to be
used
(see Section
2,
Operating
Voltage,
in this
manual for
complete
instructions).
b.
Connect the
5103N to the
line voltage
source.
Turn
the Intensity
control on the display
unit
counterclockwise
and pull
the Power switch
out
to turn the
instrument
on.
Location
of the power-supply
test
points and calibration
adjustments
is
shown
in Fig. 5-1.
Table
5-1
shows the
tolerances
of the low-voltage
supplies.
TABLE
5-1
Supply
Tolerance
-30
V
-29.925
V
to
-30.075
V
+5
V
+4.9 V
to
+5.1
V
+30 V
+29.85
V
to
+30.15 V
+205
V
+
180
V
to
+240
V
Fig.
5-1.
Locations
of power-supply test
points and adjustment
controls.
5-1