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S:\Hp8960\E1960A GSM Mobile Test Application\A.04 Release\Reference_Manual\Chapters\prog_pfer_proc.fm
Programming a Phase and Frequency Error Measurement
Programming a Phase and Frequency Error Measurement
This section provides an example of how to make the phase and frequency error (PFER) measurement via
GPIB.
The following procedure assumes that an active link is established between the test set and the mobile station.
See
“Establishing an Active Link with the Mobile Station” on page 28
.
1. Configure PFER measurement parameters using the SETup subsystem.
2. Start the PFER measurement using the INITiate subsystem.
3. Use the INITiate:DONE? command to find out if PFER measurement results are available.
4. Use the FETCh? command to obtain PFER measurement results.
Example Program
10 OUTPUT 714;”SETUP:PFERROR:CONTINUOUS OFF” !Configures a PFER measurement to
20 !single trigger mode.
30 OUTPUT 714;”SETUP:PFERROR:COUNT:NUMBER 100 !Configures a multi-measurment
40 !of 100.
50 OUTPUT 714;”SETUP:PFERROR:TRIGGER:SOURCE AUTO”!Configure trigger source
60 !to auto.
70 OUTPUT 714;”SETUP:PFERROR:BSYNC:MIDAMBLE !Configures a PFER measurement so
80 !that burst synchronization, which
90 !will synchronize the timing of the
100 !measurement algorithm relative to
110 !the data sample, will be set
120 !to midamble.
130 OUTPUT 714;”INITIATE:PFERROR” !Starts the PFER measurement.
140 REPEAT
150 OUTPUT 714;”INITIATE:DONE?” !Query to see if PFER measurement is done
160 ENTER 714;Meas_complete$
170 UNTIL Meas_complete$=”PFER”
180 OUTPUT 714;”FETCH:PFERROR:ALL?”
190 ENTER 714;Integrity, Max_phase_err, Max_peak_error, Worst_freq_err
200 END
Returned values
The measurements returned by this program are:
•
Integrity
returns the measurement
“Integrity Indicator” on page 125
(0 means a successful
measurement with no errors).
•
Max_phase_err
returns the maximum rms phase error in degrees
•
Max_peak_phase_error
returns the maximum peak phase error in degrees
•
Worst_freq_err
returns the the frequency, in Hz, that is the furthest from zero, if the most positive and
the most negative frequency error are the same value, the most positive will be returned.
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