HP 8559A REF LEVEL dBm, FM Driver Adjustment, 5-25.FIRST CONVERTER ADJUSTMENTS(SERIAL PREFIX 2236A)(Cont'd)

ADJUSTMENTS

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5-25. FIRST CONVERTER ADJUSTMENTS(SERIAL PREFIX 2236A)(Cont'd)FM Driver Adjustment

18.Disconnect frequency counter from analyzer RF Input and connect comb generator to RF Input,

19.Set comb generator for 1 MHz comb teeth.

20.Set analyzer controlsas follows:

FREQ SPAN/DIV ..........................................................	1MHz
RES BW ..................................................................	30 kHz
TIME/DIV ................................................................	AUTO
FREQUENCY BANDGHz ...........................................	Band 1 (.01-3)
REF LEVEL dBm ............................................................	- 20
INPUT ATTEN ..............................................................	0 dB
ALTIF .................................................................	OFF(out)
SIG IDENT .............................................................	OFF (out)
Amplitude Scale ........................................................	10 dB/DIV

21.T h e front-panelTUNING control for approximately1500 MHz indication on front-panelFREQUENCY display.

22.Adjust front-panel TUNING FINE control to place a comb tooth on the first graticule line on the main- frame CRT display.

23.Adjust A7R38 FM to place a comb tooth on the ninth graticule line.

24.Readjust TUNING FINE control to place a comb tooth on the first graticule line and adjust A7R38 FM to place a comb tooth on each of the graticule lines while keeping the first comb tooth aligned using the TUNING FINE control.

25.T h e to approximatel./ 100 MHz and verify that when a comb tooth is placed on the first graticule line using the TUNING FINE control that the ninth comb tooth is aligned with the ninth graticule line *1 minor division.

26.Repeat step 25 for frequencyof approximately 2500 MHz.

27.If necessary, A7R38 FM may be compromise adjusted for best span linearity at the three frequencies indicated.

28.Set comb generator for 100-MHz comb teeth.

29.Adjust front-panel TUNING control for 100 MHz indication on FREQUENCY display

30.Set FREQ SPAN/DIV to 2 MHz.

31.Adjust TUNING to place 100-MHz comb tooth on center graticule line.