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S:\Hp8960\E1962B CDMA 2000\Pi Release\Reference Guide\Chapters\cdma2000_prog_afan_freq.fm

Programming an Audio Frequency Measurement

This section provides an example of how to make an audio frequency measurement with the Audio Analyzer

(AFANalyzer) via GPIB.

The following procedure assumes that an audio source is connected to the AUDIO IN connectors. See “Audio

Analyzer Measurement Description” on page 38.

1. Configure audio analyzer measurement parameters using the SETup subsystem. When more than one

audio frequency signal may be present, use the 100 Hz bandpass filter to isolate the desired signal for

measurement (see the Programming Example below).

2. Start the audio analyzer measurement using the INITiate subsystem.

3. Use the FETCh? subsystem to obtain audio analyzer measurement results.

Programming Example

10 OUTPUT 714;”SETup:AFANalyzer:CONTinuous OFF” !Set the audio analyzer

20 !measurements to single trigger mode.

30 ! OUTPUT 714;”SETup:AFANalyzer:PEAK:VOLTage 3V” !Set the Expected peak voltage

40 !for the audio input level in Vpeak.

50 OUTPUT 714;”SETup:AFANalyzer:FREQuency:STATe ON” !Enable audio frequency meausurement.

60 OUTPUT 714;”SETup:AFANalyzer:FILTer TBPass” !Select the 100 Hz bandpass filter.

70 OUTPUT 714;”SETup:AFANalyzer:FILTer:TBPass 6000 Hz” !Set the 100 Hz bandpass

80 !filter’s center frequency to 6 kHz (example; to measure SAT frequency).

90 OUTPUT 714;”SETup:AFANalyzer:TIMeout 3S” !Set a timeout value of 3 seconds

100 !in case the measurement cannot be made.

110 OUTPUT 714;”INITiate:AFANalyzer” !Start the AF Analyzer measurement.

120 OUTPUT 714;”FETCh:AFANalyzer:FREQuency?” !Fetch the Audio Frequency result.

130 ENTER 714;Audio_frequency !Enter the returned value into a variable.

140 END

Agilent Technologies 8960 Series Reference Guide

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