To Track The Peak Point; Reference Positions - HP 8712C User Manual

1. If you want to move the reference position (indicated by the ) symbol on
the left side of the display), press (-1 IW~MWLCEI PesitfoiEt and
then use the front panel knob, the ch) (IJJ keys, or the numeric keypad to
enter a new reference position. A number is assigned to each possible
reference position. See Figure 4-19.
10
9
8
7
8
5
4
3
2
1
0
level is now adjusted with each sweep so that the peak point on the
measurement trace falls on the reference line. Note that the y-axis is now
a relative scale, with all amplitude values referenced to the reference line.
The y-axis reverts to its previous scale format, and the reference level is
readjusted so that the measurement trace is placed correctly on the display
for absolute measurements.
Figure 4-I 9. Reference Positions
Using Instrument Functions
Using Reference Tracking
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