HP 8568B, Performance Tests And Adjustments Manual, Page: 15 / 313

Introduction
Warning
Instruments Covered
by this Manual
This HP Tests and Adjustments Manual contains two sections:
Performance Tests and Adjustments Procedures. The Performance
Tests provided should be performed for the following reasons:
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.
For complete verification of specifications not covered by the
Operation Verification program.
The adjustment procedures should be performed for the following
reasons:
If the results of a performance test are not within the specifications.
After the replacement of a part or component that affects electrical
performance.
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 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.
This manual contains procedures for testing and adjusting HP
Spectrum Analyzers, including those with Option 001 (75 Ohm RF
INPUT), Option 400 (400 Hz operation), Option 462, and Option 857
installed. The procedures in this manual can also be used to adjust HP
Spectrum Analyzers that have been converted into HP
Spectrum Analyzers through the installation of an HP Retrofit
Kit (formerly HP Retrofit Kit).
G e n e r a l I n f o r m a t i o n