To Track A Frequency - HP 8712ES User Manual

Using Instrument Functions
Using Reference Tracking

To Track a Frequency

1. If you want to move the reference position (indicated by the
on the left side of the display), press
and then use the front panel knob, the
numeric keypad to enter a new reference position. A number is
assigned to each possible reference position. See
2. Press
SCALE
Use the front panel knob, the
keypad to enter the frequency of interest.
3. Press
SCALE
reference level is now adjusted with each sweep so that the frequency
of interest falls on the reference line. Note that the y-axis is now a
relative scale, with all amplitude values referenced to the reference
line. Also note that a small arrow appears underneath the
measurement trace at the point where the frequency of interest
intersects the reference line.
4. To turn reference tracking off, press
Reference Tracking OFF
scale format, and the reference level is readjusted so that the
measurement trace is placed correctly on the display for absolute
measurements.
4-44
Reference Tracking
Reference Tracking
. The y-axis reverts to its previous
Reference Position
SCALE
keys, or the
Figure 4-19.
Set Track Frequency
keys, or the numeric
Track Frequency
SCALE
ES User's Guide
symbol
.
. The