During remote operation of the Swept Audio measurement, you should always set the Trigger Arm setting to Single. The length of time required to return a measurement over GPIB using continuous triggering varies, but is always longer than when using single triggering. Continuous triggering can also cause problems when the INITiate:DONE? query is used.
If digital measurements are active, turn them off or set their trigger source to Immediate. See Triggering of Measurements .
The Detector Type selected (peak or rms) also sets how Audio Level measurements are displayed; as a peak value or an rms value. When comparing returned values over GPIB to your specifications, be sure to take into account the type of detector being used.
The Expected Peak Voltage is always set in V peak , regardless of the Detector Type selected, and cannot exceed 20 V peak (14.1 V rms ).
For accurate measurements, always set the Detector Type, Filter Type, and other audio analyzer settings for the type of measurement being made. The SINAD and Distortion measurements typically use different settings than the Audio Level measurement. See Audio Analyzer Measurement Description and Audio Analyzer Block Diagram .
For very low level audio signals, or for measurements made in a noisy environment, use the 100 Hz BW BPF filter to reduce the affects of noise (see Audio Analyzer Measurement Description ).
See Integrity Indicator .
If over range (5) is returned, the input level is greater than 4.9 dB above the Expected Peak Amplitude value or the maximum input level of 20 volts peak.
If under range (6) is returned, the input level is lower than 8 dB below the Expected Peak Amplitude value.
If the signal has both over range and under range conditions, only the over range condition (5) is indicated.