HP 8559A Operation And Service Manual page 209

/ ' -
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.
Set
analyzer controls as follows:
FREQ SPAN/DIV
RES BW
FREQUENCY BANDGHz
REF LEVEL dBm
INPUT ATTEN
ALTIF
SIG IDENT
Amplitude Scale
21. T h e front-panel TUNING control for approximately 1500 MHz indication on front-panel FREQUENCY
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.
Readjust TUNING FINE control to place a comb tooth on the first graticule line and adjust A7R38 FM to
24.
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
minor division.
26. Repeat step 25 for frequency of 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.
ADJUSTMENTS
..........................................................
..................................................................
................................................................
...........................................
............................................................
..............................................................
.............................................................
........................................................
30 kHz
AUTO
Band 1 (.01-3)
- 20
OFF (out)
10 dB/DIV
1