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MODEL 8559A
ADJUSTMENTS
ADJUSTMENTS
5
-
20. 1
-
dB OFFSET ADJUSTMENT (Cont'd)
2.
Connect equipment as shown in Figure
5
-
4.
3.
Adjust vertical position to align trace on bottom graticule.
4.
Set tuning to
35
MHz.
Set TUNING control to center the trace on the display. Set REF LEVEL FINE for
a
full
-
screen trace (signal at top graticule line).
5. Set Amplitude Scale to 10
dB/DIY Adjust
VERT
GAIN if necessary for full screen trace.
6.
Repeat steps
3
and
4
until the trace is full screen in both LIN and 10 dB/DIY
NOTE
1
dBlDlV will read approximately 0.5 dB (0.5 division) low when using
extender cable assembly. Adjusting
A15R1 1 dB OFFSET for a trace 0.5 divi
-
sion down from top graticule line should place signal at top graticule line
when
HP
8559A is properly installed in display mainframe.
7.
Set Amplitude Scale to 1 dB/DIV. Adjust A15R1 1 dB OFFSET for a trace 0.5 division down from top
graticule line.