HP 8559A Operation And Service Manual page 150

ADJUSTMENTS
FIRST CONVERTER ADJUSTMENTS (Cont'd)
5-25.
Set FREQ SPAN/DIV to 1 MHz. Note position of comb tooth.
Adjust A7R81 (MO) to place comb tooth midway between position noted in step 38 and center graticule
line.
Set FREQ SPAN/DIV to 2 MHz.
Adjust TUNING to place comb tooth in center graticule line.
Set FREQ SPAN/DIV to 1 MHz. Note displacement of comb tooth from center graticule line.
Repeat steps 36 through
ADJUSTMENTS
42 until displacement of comb tooth is less than 0.2 major division when FREQ
MHz to 1 MHz.
2
MODEL 8559A