To Track A Frequency - HP 8712C User Manual

Using Instrument Functions
Using Reference Tracking
1. If you want to move the reference position (indicated by the ) symbol on
the left side of the display), press (EiE] R&WWHX Posftioa and
then use the front panel knob, the 0J (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.
Press (EKE] Ref %zentze Tra&irtg Set Track Fraq~+~cy . Use the
front panel knob, the @ (lJ keys, or the numeric keypad to enter the
frequency of interest.
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. lb turn reference tracking off, press (Erie] Ref eraac@ Tracking Oft .
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.
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