HP 8340B Manual page 210

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A. BESTCHBSRDBIAS
STRAIGHT
LINE
D. GOOD CH A MOD LVL
HP 8340B/41B
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C. BAD CH B SRD BIAS
(ADJUST OFFSET A CONTROL COUNTER-
CLOCKWISE
TO IMPROVE WAVEFORM.)
LOOP GOES
UNLEVELED
Figure 5-55. Typical MOD LVL and SRD BIAS Waveforms
B. ACCEPTABLE CH B SRD BIAS.
(ADJUSTOFFSETA CONTROLCLOCKWISE
TO IMPROVE WAVEFORM.)
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E.
CURVED
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BAD CH A MOD LVL
Adjustments 5-105