Agilent Technologies E5100A, Programming Manual, Page: 340 / 373

4. Settings P arameters for Tracking Function
The following process is required for the tracking function.
Set the start frequency for tracking (PTFR , unit:Hz)
Set the range from the start frequency for tracking to search the resonant point F
r
(PTFRSR ,
unit:Hz)
Set the range value for a phase (PTTRGLMT , unit:deg.)
Set the measurement abort ON/OFF when the phase is over the limit (PTABORT )
Dene the phase at the resonant point. (PTTRGPHS )
Set the number of tracking for each measurement point (PTREPN )
5. Searching for Resonant P oint
E5100A/B searches the range specied by PTFRSR command for the resonant point, which is
dened by PTTRGHS . When the resonant point is measured, E5100A/B automatically sets the
test signal level to the same level as ST ART and uses the calibration data at the start point.
Then Get F
r
, CI, and the tracking parameter at the resonant point. (SRCHFR? )
6. Tracking Measurement
T o start the tracking, the following procedure is required.
Set the phase tracking ON (PTRACK )
Set the reference frequency (PTFR )
Set the tracking parameter given by the SRCHFR? query response (PTPARA )
Check the status of phase tracking (PTSTAT? )
7. The Measurement Result
This program gives you the following result.
Figure G-2 describes the result screen. The upper half of the screen shows the measurement
and the lower half shows the resonant frequency at the minimum drive level and resonant
frequencies and resonant impedance of typical drive levels (in [W]) are displayed.
V alues along the horizontal axis on the screen (drive levels) are displayed in the unit specied
by the marker . The data trace indicates resonant impedance and the sub trace indicates
resonant frequency (1f).
When E5100A option 023 displays a resonant frequency (1f), it displays the value relative to
the reference frequency specied by PTFR command.
H-4 Option 023