Programming A Frequency Stability Measurement; Programming Example; Returned Values - Agilent Technologies 8960 Series Reference Manual

Programming a Frequency Stability Measurement

This section provides an example of how to make analog frequency stability measurements via GPIB.
The following program example assumes that a signal within the measurements range is connected to the RF
IN/OUT connector (see
The basic procedure to test Frequency Stability is as follows:
1. Set the operating mode to CW (see
2. Enter the expected power (see
3. Enter the expected frequency (see
4. Define the Frequency Stability Setup parameters as desired for measurement timeout and
multi-measurements (see
5. Use the "INITiate"
6. Use the "FETCh:FSTability"

Programming Example

10 !Set the expected frequency and power.
20 OUTPUT 714;"SETup:FSTability:CONTinuous OFF" !Set the frequency stability
30
40 OUTPUT 714;"SETup:FSTability:TIMeout 1 S" !Set a timeout value of 1 second
50
60 OUTPUT 714;"SETup:FSTability:COUNt 5" !Set multi-measurements to 5.
70 OUTPUT 714;"INITiate:FSTability" !Start the measurement.
80 OUTPUT 714;"FETCh:FSTability?" !Query the returned integrity indicator and the
90 !Worst Case Frequency Error and average Frequency measurements.
100 ENTER 714;Integrity,Freq_error,Frequency
110 IF Integrity=0 THEN
120 ELSE
130 PRINT "Measurement problem; check for signal level over/under range condition."
140 END IF
150 END

Returned Values

The measurements returned by this program are:
• Integrity returns the measurement integrity indicator; 0 means a successful measurement with no
errors.
• Freq_error returns the worst case frequency error in parts per million (PPM). Frequency returns the
average frequency.
"Input Signal Requirements" on page
"CALL[:CELL]:OPERating"
"RFANalyzer:CW:EXPected:POWer"
"RFANalyzer:MANual:MEASurement[:MFRequency]"
"SETup:FSTability" on page
command to start the measurement.
command to obtain the measurement results.
!See if the integrity value = 0 (valid measurement).
57).
).
546).
!measurement to single trigger mode.
!in case the measurement cannot be made.
!Enter the returned values into variables.
S:\Hp8960\E1962B CDMA 2000\Pi Release\Reference Guide\Chapters\cdma2000_prog_fstab.fm
Programming a Frequency Stability Measurement
).
).
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