HP 8559A Operation And Service Manual page 170

Spectrum analyzer

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CAL OUTPUT AND REF LEVEL CAL ADJUSTMENTS (Cont'd)

15. Signal peak should now be approximately at top graticule line (Reference Level) on CRT.

16. Switch between 10 dB/DIV and LIN while adjusting A12R57 1A (offset) to place signal peak at same level

in both 10 dB/DIV and LIN.

17. Level at which signal peaks are coincident should be at top graticule line (Reference Level). If not, adjust

front-panel VERTICAL GAIN to place signal peak at Reference Level line. Be sure VERTICAL POSN is

properly adjusted for baseline on bottom graticule line.

18. Replace CAUTION label (PC Board) on A12 Step Gain.

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