Agilent Technologies E8285A manual Time/div, Time Offset, Frequency Accuracy Definition IS-98

Chapter 4, Description of Fields

Fields

Time/div

This field selects the horizontal sweep time per division.

Operating Considerations

The time-per-division is selected from a list of choices.

Screens Where Field is Present

OSCILLOSCOPE

Time Offset

This field is displayed when Freq Error is selected from the list of choices available when the unnamed field displaying one of the following choices is displayed:

•frequency error

•amplitude error

•time offset measurement

The time offset measurement is the timing difference between the beginning of a Test Set generated frame, as measured at the Test Set’s front panel connector, and the beginning of the same frame received on the reverse link.

GPIB Example

“DISP CTXT;MEASure:CDManalyzer:TIME:OFFS?“

queries the CDMA time offset measurement result.

Operating Considerations

These measurements, along with rho, phase error, and carrier feedthrough are made by DSP analysis techniques. The Meas Cntl field controls these measurements.

Time offset is referred to as time alignment in the Waveform Quality and

Frequency Accuracy Definition (IS-98).

See Also

Meas Cntl field description, on page 295

Ampl Error field description, on page 164

Freq Error (Analog) field description, on page 266

Screens Where Field is Present

CDMA CELLULAR MOBILE TRANSMITTER TEST

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