HP 8568B manual Performance Tests 2

16. Residual FM Test

13.Press MARKER Ia] and position movable marker at the lowest point on the trace (see Figure 2-30). Read the MARKER A amplitude from the display and record its absolute value.

MARKER A amplitude = p-p amplitude = dB

14.Divide the peak-to-peak amplitude by the slope computed in step

8 to obtain the residual FM:

p-p amplitude/filter slope = residual FM

dB/ dB/Hz = Hz

= residual FM

The residual FM should be less than 3 Hz.

15.Press ~NSTR PRESET].

16.Press Cm] 9 and adjust FREQ ZERO for a maximum amplitude

trace.

Performance Tests 2 - 59