Last updated: December 3, 2008
This measurement is not applicable to GPRS or EGPRS.
This section provides an example of how to make an Audio Frequency measurement via the GPIB.
The following procedure assumes that an audio source is connected to the AUDIO IN connectors. See Analog Audio Measurement Description .
10 OUTPUT 714;"SETup:AAUDio:CONTinuous OFF" !Set the audio 20 !measurements to single trigger mode. 30 OUTPUT 714;"SETup:AAUDio:EXPected:VOLTage 3V" !Set the Expected peak voltage 40 !for the audio input level in Vpeak. 50 OUTPUT 714;"SETup:AAUDio:FREQuency:STATe ON" !Enable audio frequency measurement. 60 OUTPUT 714;"SETup:AAUDio:FILTer:STATe ON" !Enable the bandpass filter. 70 OUTPUT 714;"SETup:AAUDio:FILTer:FREQuency 8000 Hz" !Set the filter's center 80 !frequency to 8 kHz. 90 OUTPUT 714;"SETup:AAUDio:TIMeout 3S" !Set a timeout value of 3 seconds 100 !in case the measurement cannot be made. 110 OUTPUT 714;"INITiate:AAUDio" !Start the Analog Audio measurement. 120 OUTPUT 714;"FETCh:AAUDio:INTegrity?" !Query the integrity indicator to 130 !verify that a reliable measurement was made. 140 ENTER 714;Integrity !Enter the returned value into a variable for comparison 150 !with possible integrity indicator values (not shown here). 160 IF Integrity=0 THEN !Only fetch measurement result if integrity indicator is 0. 170 OUTPUT 714;"FETCh:AAUDio:FREQuency?" !Fetch the analog audio frequency result. 180 ENTER 714;Audio_frequency !Enter the result into a variable. 190 END IF 200 END
The results returned by this program are: