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General Information
Introduction
This HP 8568B Tests and Adjustments
Manual
contains
two sections:
Performance
Tests
and Adjustments
Procedures.
The Performance
Tests provided
should be performed
for the
following
reasons:
n
If the test equipment
for the Operation
Verification
Program
is not available.
n
If the instrument
does not pass all of the Operation
Verification
tests.
n
For complete
verification
of specifications
not covered by the Operation
Verification
program.
The adjustment
procedures
should be performed
for the following
reasons:
w If the results of a performance
test are not within
the specifications.
n
After
the replacement
of a part or component
that affects electrical
performance.
Warning
The adjustment
procedures
require
access to the interior of the instrument
and therefore
should only be performed
by qualified
service
personnel.
There
are voltages
at many points in the instrument
which can, if contacted,
cause
personal
injury. Be extremely
careful.
Adjustments
should be performed
only
by trained
service
personnel.
Power is still applied
to this instrument
with the LINE switch in STANDBY.
There is no OFF position
on the LINE switch.
Before removing
or installing
any
assembly
or printed
circuit board, remove the power cord from the rear of both
instruments
and wait for the MAINS indicators
(red LEDs) to go completely
out.
Capacitors
inside the instrument
may still be charged
even if the instrument
has
been disconnected
from its source of power.
Use a non-metallic
tuning tool whenever
possible.
Instruments Covered by this Manual
This manual
contains
procedures
for testing
and adjusting
HP 8568B Spectrum
Analyzers,
including
those with Option
001 (75 Ohm RF INPUT),
Option
400 (400 Hz operation),
Option
462 (Impulse
Bandwidths),
and Option
857 installed.
The procedures
in this manual
can also be used to adjust
HP 8568A Spectrum
Analyzers
that have been converted
into HP
8568B Spectrum
Analyzers
through
the installation
of an HP 8568AB
Retrofit
Kit (formerly
HP 8568A+OlK
Retrofit
Kit).
General
Information
l-1
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