HP 8559A Operation And Service Manual page 127

MODEL 8559A
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
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.
ADJUSTMENTS
NOTE
ADJUSTMENTS