Adjustments; 5- 1 . Introduction; Locations; Crt Control And High Voltage - HP 3585A Service Manual

5- 1 . INTRODUCTION

This section contains complete adjustment procedures for the Model 3585A Spectrum
Analyzer. Table 5-1 lists the adjustments and their affected components. Figures 5-45 and
5-46 are foldout drawings found at the end of this section. These drawings show adjustment
locations throughout the instrument.
Adjustment
Low Voltage Power Supplies
(A7 1 - 7 5 )
90MHz Reference 80ard (A2 1 )
1 OMHz Oven Oscillator (A8 1 )
Oven Output Shutdown

CRT Control and High Voltage

Power Supply (A6 3 , 6 5 , 6 7 )
CRT G raphics (A64 , 6 7 )
CRT Alphanumerics (A64)
Fractional N (A3 1 -34)
L . O . Step Loop (A23-26)
First L . O . VTO and Sum Loop
Video Filter and AID (A 1 5, 1 6 )
Log A m p a n d 30kHz Filter (A 1 4)
Log A m p Slope Adjustment (A 1 4)
Reference Level DC Offset (A 1 5)
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SECTI O N V

ADJUSTMENTS

Table 5- 1 . Adjustment Locations
Paragraph
Location
Affected Components
5- 6 A 7 5 R9 , R 1 5 , A 7 2 R3 1 ,
R 1 9
5-7 A2 1 R 1 2 5
5-8
A8 1 R2
5-9 A8 1 R9
5- 1 0 A 6 7 R4 6 , R 6 , R 1 0 5, R 1 1 6 ,
A 6 5 R 1 3 , A 6 3 R 4 , R 1 -
6 , R 3 8
5 - 1 1
A 6 7 R 5 9 , R 8 5 , R 5 4 , R 8 0 ,
R3, R 2 , R 1
5- 1 2 A 6 4 R 7 2 , C 2 3 , R4 8 , R 6 2 ,
R 1 4, R 1 6 , R 1
5 - 1 3 A34R3 2 , A 3 1 L3,
A 3 2 R49 , R 5 6
5- 1 4 A 2 3 L 1
5- 1 5 A 2 7 R 2 , R 1 1
5- 1 6 A 1 6 R2 1 , R 1 9 ,A 1 5R4
5- 1 7
A 1 4L 5 , L 7 , R 5 7 , R 5 3
A 1 7 R 1 0 5 , A 1 5 R 7
5- 1 8 A 1 4 R 4 3 , R 1 7 , R 7 , R 8 ,
R 1 4 , R 2 1 , R 2 6
5- 1 9 A 1 5 R 9 , R 7
Service Group
I
8- 1
8 - 1
8 - 1
D- 2 , 4
D-4
D-3
8-4 , 5
8-3
8-2
A- 5 , 6
A-3 , 4 , 5
A- 4
A- 5
5-1