Chapter 4, Description of Fields

Fields

SNR

When set to SNR, this field displays the signal to noise ratio of the input audio signal.

This field is a one-of-many field used to select the type of measurement to be made by the Audio Frequency Analyzer on the audio signal being measured. See “Measure” in the GPIB Command Syntax chapter of the E8285A Condensed Programming Reference Guide for programming command syntax.

Selecting this field displays the following measurement choices:

SINAD

Distn (Distortion)

SNR (Signal to Noise Ratio)

AF Freq

DC Level

Current (DC only)

Operating Considerations

This is a priority control field. Accessing the RX TEST or TX TEST screen overrides any changes made to this field in other screens.

SNR Operation

Selecting SNR turns off the other audio measurements.

The RF Generator and AFGen1 must be set up to provide the radio’s carrier. (AFGen1 is automatically turned on and off repeatedly during this measurement.)

AFGen2 must be turned off.

The radio’s receiver’s audio output must be connected to the AUDIO IN port (set the

AF Anl in field to Audio In.

Screens Where Field is Present

AF ANALYZER

RX TEST

TX TEST

DUPLEX TEST

RF GENERATOR

RF ANALYZER

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Agilent Technologies E8285A manual Snr, SNR Operation