Adjustment I Nteraction - Agilent Technologies 4284A Service Manual

2-5. ADJUSTMENT I NTERACTION

Some of the HP 4284A adjustments are interactive. If you repair or replace an HP 4284A
assembly, be s u re to perform the related adjustment(s) in the sequence g iven . Table 2-2
lists the adjustments required for each assem bly repaired or replaced. I gnoring or changing
the adjustment sequence will make it impossible to obtain optimum performance.
Assembly Replaced or Repaired
A1 Power Supply
Modulator
A2
A3 Range Resistor
A3 Range Resistor (Opt. 00 1 )
A4 H i-PW Amplifier (Opt. 001 )
A5 Signal Source
A6 Vector Ratio Detector
A7 Dig ital Control
A9
Keyboard
A1 1 M other Board
A1 3 DC-AC Converter
A20 . H P- I B I nterface
A30 Handler Interface (Opt. 201 )
A3 1 Handler Interface (Opt. 202)
A40 Scanner I nterface (Opt. 301 )
A51 Bias Current I/F (Opt. 002)
A90 Keyboard/Display Control
A9 1 LCD Module
*: Option 001 only
Table 2-2 . Required Adjustments
Adjustments Required
(Paragraph Number)
2-8
2-1 2
2-9, 2-1 1 , 2-1 2
2-9, 2-1 0 , 2-1 1 , 2-1 2
2-1 0, 2-1 1
2-1 1
2-1 1 , 2-1 2
2-1 0*, 2-1 1 , 2-1 2
None
None
None
None
None
None
None
None
None
None
2-3