BWD MINI-LAB 603B Manual page 44

7.
ALIGNMENT
Component- changes
will not
normally affect the
performance
of the unit,
subject
to
the
replacement
component
being
of similar size, stability
and performance
to
the
original
component.
Test
Instruments Required;
TYPE
CHARACTERISTICS
USE
Multimeter
AC
and
DC
Voltage
to
>250V
DC
Ampere
to
>2A
Voltage and
current
measurement
.
AC
Millivoltmeter
Sensitivity
5mV
FSD
and
50mV
FSD
Frequency Range
to
>50MHz
Ripple
and
noise
measurement.
Oscilloscope
"Y" Bandwidth
DC-20MHz
"Y"
Sensitivity
lOmV
to
>10V^cm
AC
and
DC
coupled
Viewing
of various
waveforms -
p-p
measurements.
Digital
Frequency
Meter
Frequency Range
lOHz
to
>2MHz
Frequency measurement.
Distortion
Analyser
Frequency Range
>10Hz -50kHz
Sine
distortion
measurement.
General
Procedure;
The
order of adjustments described
in this
Section has
been determined
so that
any
adjustment
will
not affect a previous adjustment. RV320 and RV321
,
however,
should
be checked
before
any
other adjustments are carried out,
since the fixed
±15V
rails
are used throughout
the unit
and
should they be
outside the tolerances given,
difficulty
may
be experienced. The following
Table shows
the possible interactions of
the
various controls.
Adjustment
of
a
preset
in
Column
A
will
affect
only
the preset opposite
an
'X' in
Column
B.
For location of presets see Section 7.21
for
P.C.B.
layout
drawings.
Allow
15 minutes'
warm
up time before calibration.
7-0
603B