Agilent Technologies E8285A manual AM Depth, Ampl Error

Models: E8285A

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Chapter 4, Description of Fields

Fields

AM Depth

This field displays the percent depth of modulation of the AM signal. The field is only visible when the AF ANL In field is set to AM MOD or AM DEMOD.

Screens Where Field is Present

AF ANALYZER

RF ANALYZER

RF GENERATOR

Ampl Error

This field is displayed when Ampl 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

Amplitude error is an indication of the quality of the amplitude component in the reverse link OQPSK (offset quadrature phase shift keyed) signal. It is the expressed as a percent difference between the magnitude of the ideal amplitude vector and the magnitude of the amplitude vector transmitted from the mobile station.

GPIB Example

“DISP CTXT;MEASure:CDManalyzer:AMPL:ERRor?“

queries the CDMA amplitude error 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.

See Also

Freq Error (Analog) field description, on page 266

Meas Cntl field description, on page 295

Time Offset field description, on page 427

Screens Where Field is Present

CDMA CELLULAR MOBILE TRANSMITTER TEST

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S:\agilent\e8285\REFGUIDE\MANUAL\fields.chp

Page 164
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Agilent Technologies E8285A manual AM Depth, Ampl Error, Queries the Cdma amplitude error measurement result