Agilent Technologies 8960 10 Series Reference Manual page 83

Types of Signals PFER can Measure
PFER measurements can be made of these types of input signals.
• Normal GSM TCH burst with mobile station in active cell mode.
• Access (RACH) burst with mobile station in active cell mode.
• Normal GSM TCH burst with mobile station in test mode.
• Access (RACH) burst with mobile station in test mode.
• Bursted signal with GMSK modulation without a valid midamble.
Input Signal Requirements
The PFER measurement will complete and meet its accuracy specification of:
• Frequency error measurement accuracy of ±12 Hz + timebase reference.
• rms phase error measurement accuracy of less than ±1 degree.
• Peak phase error measurement accuracy of less than ±4 degrees.
under these conditions
• Level is between −15 dBm and +43 dBm.
• Level within ±3 dB of the expected input level.
• Frequency is within ±100 kHz of expected input frequency.
Trigger Source
Auto triggering is the recommended trigger source for each measurement allowing the test set may choose the
preferred trigger source. However, the user may want to select the trigger source. Immediate trigger source is
not recommended for PFER measurements.
Table 3. Recommended Trigger Source settings
Input Signal Type
Normal GSM TCH burst with mobile
station in active cell mode
RACH burst with mobile station in active
cell mode
Normal GSM TCH burst with mobile
station in test mode
RACH burst with mobile station in test
mode
Bursted signal with GMSK modulation but
no valid midamble
Non-bursted non-GMSK signals with a
manual frequency offset of +/- 67.7083 kHz
Recommended Trigger Source
Midamble or Amplitude
Midamble or Amplitude
Amplitude
Amplitude
Amplitude
Immediate
S:\Hp8960\E1960A GSM Mobile Test Application\A.04 Release\Reference_Manual\Chapters\meas_pfer_desc.fm
Phase and Frequency Error Measurement Description
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