HP 8566B Adjustment Manual page 265

13. Sweep, DAC, and Main Coil Driver Adjustments
73. Use signal generator TUNING control to vary signal generator
output frequency flO0 MHz (from frequency in step 70) in 1 MHz
steps. Readjust A19R43 25 GHz SPAN slightly as necessary so that
amplitude of displayed signal peak varies less than 3 dB over
entire flO0 MHz range bracketing band overlap point.
74. Key in
75. Verify that jumper between A12TP2 and A12TP3 (Lock Indicator
Disable) has been removed. Replace RF Digital Section cover over
Al2 through Al6 assemblies.
)=.
PEAK
Adjustments 3-125